commit vendor

vendor/.htaccess

@@ -0,0 +1,6 @@
+<IfModule mod_authz_core.c>
+Require all denied
+</IfModule>
+<IfModule !mod_authz_core.c>
+deny from all
+</IfModule>

vendor/autoload.php

@@ -0,0 +1,7 @@
+<?php
+
+// autoload.php @generated by Composer
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInit6882c6981c649052754140f42b94e11f::getLoader();

vendor/blueimp/jquery-file-upload/LICENSE.txt

@@ -0,0 +1,20 @@
+MIT License
+
+Copyright © 2010 Sebastian Tschan, https://blueimp.net
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/blueimp/jquery-file-upload/SECURITY.md

@@ -0,0 +1,227 @@
+# File Upload Security
+
+## Contents
+
+- [Introduction](#introduction)
+- [Purpose of this project](#purpose-of-this-project)
+- [Mitigations against file upload risks](#mitigations-against-file-upload-risks)
+  - [Prevent code execution on the server](#prevent-code-execution-on-the-server)
+  - [Prevent code execution in the browser](#prevent-code-execution-in-the-browser)
+  - [Prevent distribution of malware](#prevent-distribution-of-malware)
+- [Secure file upload serving configurations](#secure-file-upload-serving-configurations)
+  - [Apache config](#apache-config)
+  - [NGINX config](#nginx-config)
+- [Secure image processing configurations](#secure-image-processing-configurations)
+- [ImageMagick config](#imagemagick-config)
+
+## Introduction
+
+For an in-depth understanding of the potential security risks of providing file
+uploads and possible mitigations, please refer to the
+[OWASP - Unrestricted File Upload](https://owasp.org/www-community/vulnerabilities/Unrestricted_File_Upload)
+documentation.
+
+To securely setup the project to serve uploaded files, please refer to the
+sample
+[Secure file upload serving configurations](#secure-file-upload-serving-configurations).
+
+To mitigate potential vulnerabilities in image processing libraries, please
+refer to the
+[Secure image processing configurations](#secure-image-processing-configurations).
+
+By default, all sample upload handlers allow only upload of image files, which
+mitigates some attack vectors, but should not be relied on as the only
+protection.
+
+Please also have a look at the
+[list of fixed vulnerabilities](VULNERABILITIES.md) in jQuery File Upload, which
+relates mostly to the sample server-side upload handlers and how they have been
+configured.
+
+## Purpose of this project
+
+Please note that this project is not a complete file management product, but
+foremost a client-side file upload library for [jQuery](https://jquery.com/).  
+The server-side sample upload handlers are just examples to demonstrate the
+client-side file upload functionality.
+
+To make this very clear, there is **no user authentication** by default:
+
+- **everyone can upload files**
+- **everyone can delete uploaded files**
+
+In some cases this can be acceptable, but for most projects you will want to
+extend the sample upload handlers to integrate user authentication, or implement
+your own.
+
+It is also up to you to configure your web server to securely serve the uploaded
+files, e.g. using the
+[sample server configurations](#secure-file-upload-serving-configurations).
+
+## Mitigations against file upload risks
+
+### Prevent code execution on the server
+
+To prevent execution of scripts or binaries on server-side, the upload directory
+must be configured to not execute files in the upload directory (e.g.
+`server/php/files` as the default for the PHP upload handler) and only treat
+uploaded files as static content.
+
+The recommended way to do this is to configure the upload directory path to
+point outside of the web application root.  
+Then the web server can be configured to serve files from the upload directory
+with their default static files handler only.
+
+Limiting file uploads to a whitelist of safe file types (e.g. image files) also
+mitigates this issue, but should not be the only protection.
+
+### Prevent code execution in the browser
+
+To prevent execution of scripts on client-side, the following headers must be
+sent when delivering generic uploaded files to the client:
+
+```
+Content-Type: application/octet-stream
+X-Content-Type-Options: nosniff
+```
+
+The `Content-Type: application/octet-stream` header instructs browsers to
+display a download dialog instead of parsing it and possibly executing script
+content e.g. in HTML files.
+
+The `X-Content-Type-Options: nosniff` header prevents browsers to try to detect
+the file mime type despite the given content-type header.
+
+For known safe files, the content-type header can be adjusted using a
+**whitelist**, e.g. sending `Content-Type: image/png` for PNG files.
+
+### Prevent distribution of malware
+
+To prevent attackers from uploading and distributing malware (e.g. computer
+viruses), it is recommended to limit file uploads only to a whitelist of safe
+file types.
+
+Please note that the detection of file types in the sample file upload handlers
+is based on the file extension and not the actual file content. This makes it
+still possible for attackers to upload malware by giving their files an image
+file extension, but should prevent automatic execution on client computers when
+opening those files.
+
+It does not protect at all from exploiting vulnerabilities in image display
+programs, nor from users renaming file extensions to inadvertently execute the
+contained malicious code.
+
+## Secure file upload serving configurations
+
+The following configurations serve uploaded files as static files with the
+proper headers as
+[mitigation against file upload risks](#mitigations-against-file-upload-risks).  
+Please do not simply copy&paste these configurations, but make sure you
+understand what they are doing and that you have implemented them correctly.
+
+> Always test your own setup and make sure that it is secure!
+
+e.g. try uploading PHP scripts (as "example.php", "example.php.png" and
+"example.png") to see if they get executed by your web server, e.g. the content
+of the following sample:
+
+```php
+GIF89ad <?php echo mime_content_type(__FILE__); phpinfo();
+```
+
+### Apache config
+
+Add the following directive to the Apache config (e.g.
+/etc/apache2/apache2.conf), replacing the directory path with the absolute path
+to the upload directory:
+
+```ApacheConf
+<Directory "/path/to/project/server/php/files">
+  # Some of the directives require the Apache Headers module. If it is not
+  # already enabled, please execute the following command and reload Apache:
+  # sudo a2enmod headers
+  #
+  # Please note that the order of directives across configuration files matters,
+  # see also:
+  # https://httpd.apache.org/docs/current/sections.html#merging
+
+  # The following directive matches all files and forces them to be handled as
+  # static content, which prevents the server from parsing and executing files
+  # that are associated with a dynamic runtime, e.g. PHP files.
+  # It also forces their Content-Type header to "application/octet-stream" and
+  # adds a "Content-Disposition: attachment" header to force a download dialog,
+  # which prevents browsers from interpreting files in the context of the
+  # web server, e.g. HTML files containing JavaScript.
+  # Lastly it also prevents browsers from MIME-sniffing the Content-Type,
+  # preventing them from interpreting a file as a different Content-Type than
+  # the one sent by the webserver.
+  <FilesMatch ".*">
+    SetHandler default-handler
+    ForceType application/octet-stream
+    Header set Content-Disposition attachment
+    Header set X-Content-Type-Options nosniff
+  </FilesMatch>
+
+  # The following directive matches known image files and unsets the forced
+  # Content-Type so they can be served with their original mime type.
+  # It also unsets the Content-Disposition header to allow displaying them
+  # inline in the browser.
+  <FilesMatch ".+\.(?i:(gif|jpe?g|png))$">
+    ForceType none
+    Header unset Content-Disposition
+  </FilesMatch>
+</Directory>
+```
+
+### NGINX config
+
+Add the following directive to the NGINX config, replacing the directory path
+with the absolute path to the upload directory:
+
+```Nginx
+location ^~ /path/to/project/server/php/files {
+    root html;
+    default_type application/octet-stream;
+    types {
+        image/gif     gif;
+        image/jpeg    jpg;
+        image/png    png;
+    }
+    add_header X-Content-Type-Options 'nosniff';
+    if ($request_filename ~ /(((?!\.(jpg)|(png)|(gif)$)[^/])+$)) {
+        add_header Content-Disposition 'attachment; filename="$1"';
+        # Add X-Content-Type-Options again, as using add_header in a new context
+        # dismisses all previous add_header calls:
+        add_header X-Content-Type-Options 'nosniff';
+    }
+}
+```
+
+## Secure image processing configurations
+
+The following configuration mitigates
+[potential image processing vulnerabilities with ImageMagick](VULNERABILITIES.md#potential-vulnerabilities-with-php-imagemagick)
+by limiting the attack vectors to a small subset of image types
+(`GIF/JPEG/PNG`).
+
+Please also consider using alternative, safer image processing libraries like
+[libvips](https://github.com/libvips/libvips) or
+[imageflow](https://github.com/imazen/imageflow).
+
+## ImageMagick config
+
+It is recommended to disable all non-required ImageMagick coders via
+[policy.xml](https://wiki.debian.org/imagemagick/security).  
+To do so, locate the ImageMagick `policy.xml` configuration file and add the
+following policies:
+
+```xml
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- ... -->
+<policymap>
+  <!-- ... -->
+  <policy domain="delegate" rights="none" pattern="*" />
+  <policy domain="coder" rights="none" pattern="*" />
+  <policy domain="coder" rights="read | write" pattern="{GIF,JPEG,JPG,PNG}" />
+</policymap>
+```

vendor/blueimp/jquery-file-upload/VULNERABILITIES.md

@@ -0,0 +1,118 @@
+# List of fixed vulnerabilities
+
+## Contents
+
+- [Potential vulnerabilities with PHP+ImageMagick](#potential-vulnerabilities-with-phpimagemagick)
+- [Remote code execution vulnerability in the PHP component](#remote-code-execution-vulnerability-in-the-php-component)
+- [Open redirect vulnerability in the GAE components](#open-redirect-vulnerability-in-the-gae-components)
+- [Cross-site scripting vulnerability in the Iframe Transport](#cross-site-scripting-vulnerability-in-the-iframe-transport)
+
+## Potential vulnerabilities with PHP+ImageMagick
+
+> Mitigated: 2018-10-25 (GMT)
+
+The sample [PHP upload handler](server/php/UploadHandler.php) before
+[v9.25.1](https://github.com/blueimp/jQuery-File-Upload/releases/tag/v9.25.1)
+did not validate file signatures before invoking
+[ImageMagick](https://www.imagemagick.org/) (via
+[Imagick](https://php.net/manual/en/book.imagick.php)).  
+Verifying those
+[magic bytes](https://en.wikipedia.org/wiki/List_of_file_signatures) mitigates
+potential vulnerabilities when handling input files other than `GIF/JPEG/PNG`.
+
+Please also configure ImageMagick to only enable the coders required for
+`GIF/JPEG/PNG` processing, e.g. with the sample
+[ImageMagick config](SECURITY.md#imagemagick-config).
+
+**Further information:**
+
+- Commit containing the mitigation:
+  [fe44d34](https://github.com/blueimp/jQuery-File-Upload/commit/fe44d34be43be32c6b8d507932f318dababb25dd)
+- [ImageTragick](https://imagetragick.com/)
+- [CERT Vulnerability Note VU#332928](https://www.kb.cert.org/vuls/id/332928)
+- [ImageMagick CVE entries](https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=imagemagick)
+
+## Remote code execution vulnerability in the PHP component
+
+> Fixed: 2018-10-23 (GMT)
+
+The sample [PHP upload handler](server/php/UploadHandler.php) before
+[v9.24.1](https://github.com/blueimp/jQuery-File-Upload/releases/tag/v9.24.1)
+allowed to upload all file types by default.  
+This opens up a remote code execution vulnerability, unless the server is
+configured to not execute (PHP) files in the upload directory
+(`server/php/files`).
+
+The provided [.htaccess](server/php/files/.htaccess) file includes instructions
+for Apache to disable script execution, however
+[.htaccess support](https://httpd.apache.org/docs/current/howto/htaccess.html)
+is disabled by default since Apache `v2.3.9` via
+[AllowOverride Directive](https://httpd.apache.org/docs/current/mod/core.html#allowoverride).
+
+**You are affected if you:**
+
+1. A) Uploaded jQuery File Upload < `v9.24.1` on a Webserver that executes files
+   with `.php` as part of the file extension (e.g. "example.php.png"), e.g.
+   Apache with `mod_php` enabled and the following directive (_not a recommended
+   configuration_):
+   ```ApacheConf
+   AddHandler php5-script .php
+   ```
+   B) Uploaded jQuery File Upload < `v9.22.1` on a Webserver that executes files
+   with the file extension `.php`, e.g. Apache with `mod_php` enabled and the
+   following directive:
+   ```ApacheConf
+   <FilesMatch \.php$>
+     SetHandler application/x-httpd-php
+   </FilesMatch>
+   ```
+2. Did not actively configure your Webserver to not execute files in the upload
+   directory (`server/php/files`).
+3. Are running Apache `v2.3.9+` with the default `AllowOverride` Directive set
+   to `None` or another Webserver with no `.htaccess` support.
+
+**How to fix it:**
+
+1. Upgrade to the latest version of jQuery File Upload.
+2. Configure your Webserver to not execute files in the upload directory, e.g.
+   with the [sample Apache configuration](SECURITY.md#apache-config)
+
+**Further information:**
+
+- Commits containing the security fix:
+  [aeb47e5](https://github.com/blueimp/jQuery-File-Upload/commit/aeb47e51c67df8a504b7726595576c1c66b5dc2f),
+  [ad4aefd](https://github.com/blueimp/jQuery-File-Upload/commit/ad4aefd96e4056deab6fea2690f0d8cf56bb2d7d)
+- [Full disclosure post on Hacker News](https://news.ycombinator.com/item?id=18267309).
+- [CVE-2018-9206](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-9206)
+- [OWASP - Unrestricted File Upload](https://owasp.org/www-community/vulnerabilities/Unrestricted_File_Upload)
+
+## Open redirect vulnerability in the GAE components
+
+> Fixed: 2015-06-12 (GMT)
+
+The sample Google App Engine upload handlers before
+v[9.10.1](https://github.com/blueimp/jQuery-File-Upload/releases/tag/9.10.1)
+accepted any URL as redirect target, making it possible to use the Webserver's
+domain for phishing attacks.
+
+**Further information:**
+
+- Commit containing the security fix:
+  [f74d2a8](https://github.com/blueimp/jQuery-File-Upload/commit/f74d2a8c3e3b1e8e336678d2899facd5bcdb589f)
+- [OWASP - Unvalidated Redirects and Forwards Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Unvalidated_Redirects_and_Forwards_Cheat_Sheet.html)
+
+## Cross-site scripting vulnerability in the Iframe Transport
+
+> Fixed: 2012-08-09 (GMT)
+
+The [redirect page](cors/result.html) for the
+[Iframe Transport](js/jquery.iframe-transport.js) before commit
+[4175032](https://github.com/blueimp/jQuery-File-Upload/commit/41750323a464e848856dc4c5c940663498beb74a)
+(_fixed in all tagged releases_) allowed executing arbitrary JavaScript in the
+context of the Webserver.
+
+**Further information:**
+
+- Commit containing the security fix:
+  [4175032](https://github.com/blueimp/jQuery-File-Upload/commit/41750323a464e848856dc4c5c940663498beb74a)
+- [OWASP - Cross-site Scripting (XSS)](https://owasp.org/www-community/attacks/xss/)

vendor/blueimp/jquery-file-upload/cors/postmessage.html

@@ -0,0 +1,85 @@
+<!DOCTYPE html>
+<!--
+/*
+ * jQuery File Upload Plugin postMessage API
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+-->
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>jQuery File Upload Plugin postMessage API</title>
+    <script
+      src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"
+      integrity="sha384-nvAa0+6Qg9clwYCGGPpDQLVpLNn0fRaROjHqs13t4Ggj3Ez50XnGQqc/r8MhnRDZ"
+      crossorigin="anonymous"
+    ></script>
+  </head>
+  <body>
+    <script>
+      'use strict';
+      var origin = /^https:\/\/example.org/,
+        target = new RegExp('^(http(s)?:)?\\/\\/' + location.host + '\\/');
+      $(window).on('message', function (e) {
+        e = e.originalEvent;
+        var s = e.data,
+          xhr = $.ajaxSettings.xhr(),
+          f;
+        if (!origin.test(e.origin)) {
+          throw new Error('Origin "' + e.origin + '" does not match ' + origin);
+        }
+        if (!target.test(e.data.url)) {
+          throw new Error(
+            'Target "' + e.data.url + '" does not match ' + target
+          );
+        }
+        $(xhr.upload).on('progress', function (ev) {
+          ev = ev.originalEvent;
+          e.source.postMessage(
+            {
+              id: s.id,
+              type: ev.type,
+              timeStamp: ev.timeStamp,
+              lengthComputable: ev.lengthComputable,
+              loaded: ev.loaded,
+              total: ev.total
+            },
+            e.origin
+          );
+        });
+        s.xhr = function () {
+          return xhr;
+        };
+        if (!(s.data instanceof Blob)) {
+          f = new FormData();
+          $.each(s.data, function (i, v) {
+            f.append(v.name, v.value);
+          });
+          s.data = f;
+        }
+        $.ajax(s).always(function (result, statusText, jqXHR) {
+          if (!jqXHR.done) {
+            jqXHR = result;
+            result = null;
+          }
+          e.source.postMessage(
+            {
+              id: s.id,
+              status: jqXHR.status,
+              statusText: statusText,
+              result: result,
+              headers: jqXHR.getAllResponseHeaders()
+            },
+            e.origin
+          );
+        });
+      });
+    </script>
+  </body>
+</html>

vendor/blueimp/jquery-file-upload/cors/result.html

@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<!--
+/*
+ * jQuery Iframe Transport Plugin Redirect Page
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+-->
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>jQuery Iframe Transport Plugin Redirect Page</title>
+  </head>
+  <body>
+    <script>
+      document.body.innerText = document.body.textContent = decodeURIComponent(
+        window.location.search.slice(1)
+      );
+    </script>
+  </body>
+</html>

vendor/blueimp/jquery-file-upload/css/jquery.fileupload-noscript.css

@@ -0,0 +1,22 @@
+@charset "UTF-8";
+/*
+ * jQuery File Upload Plugin NoScript CSS
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2013, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+.fileinput-button input {
+  position: static;
+  opacity: 1;
+  filter: none;
+  font-size: inherit !important;
+  direction: inherit;
+}
+.fileinput-button span {
+  display: none;
+}

vendor/blueimp/jquery-file-upload/css/jquery.fileupload-ui-noscript.css

@@ -0,0 +1,17 @@
+@charset "UTF-8";
+/*
+ * jQuery File Upload UI Plugin NoScript CSS
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2012, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+.fileinput-button i,
+.fileupload-buttonbar .delete,
+.fileupload-buttonbar .toggle {
+  display: none;
+}

vendor/blueimp/jquery-file-upload/css/jquery.fileupload-ui.css

@@ -0,0 +1,68 @@
+@charset "UTF-8";
+/*
+ * jQuery File Upload UI Plugin CSS
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+.progress-animated .progress-bar,
+.progress-animated .bar {
+  background: url('../img/progressbar.gif') !important;
+  filter: none;
+}
+.fileupload-process {
+  float: right;
+  display: none;
+}
+.fileupload-processing .fileupload-process,
+.files .processing .preview {
+  display: block;
+  width: 32px;
+  height: 32px;
+  background: url('../img/loading.gif') center no-repeat;
+  background-size: contain;
+}
+.files audio,
+.files video {
+  max-width: 300px;
+}
+.files .name {
+  word-wrap: break-word;
+  overflow-wrap: anywhere;
+  -webkit-hyphens: auto;
+  hyphens: auto;
+}
+.files button {
+  margin-bottom: 5px;
+}
+.toggle[type='checkbox'] {
+  transform: scale(2);
+  margin-left: 10px;
+}
+
+@media (max-width: 767px) {
+  .fileupload-buttonbar .btn {
+    margin-bottom: 5px;
+  }
+  .fileupload-buttonbar .delete,
+  .fileupload-buttonbar .toggle,
+  .files .toggle,
+  .files .btn span {
+    display: none;
+  }
+  .files audio,
+  .files video {
+    max-width: 80px;
+  }
+}
+
+@media (max-width: 480px) {
+  .files .image td:nth-child(2) {
+    display: none;
+  }
+}

vendor/blueimp/jquery-file-upload/css/jquery.fileupload.css

@@ -0,0 +1,36 @@
+@charset "UTF-8";
+/*
+ * jQuery File Upload Plugin CSS
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2013, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+.fileinput-button {
+  position: relative;
+  overflow: hidden;
+  display: inline-block;
+}
+.fileinput-button input {
+  position: absolute;
+  top: 0;
+  right: 0;
+  margin: 0;
+  height: 100%;
+  opacity: 0;
+  filter: alpha(opacity=0);
+  font-size: 200px !important;
+  direction: ltr;
+  cursor: pointer;
+}
+
+/* Fixes for IE < 8 */
+@media screen\9 {
+  .fileinput-button input {
+    font-size: 150% !important;
+  }
+}

vendor/blueimp/jquery-file-upload/docker-compose.yml

@@ -0,0 +1,59 @@
+version: '3.7'
+services:
+  example:
+    build: server/php
+    ports:
+      - 127.0.0.1:80:80
+      - ${SERVER_HOST:-127.0.0.1}:${SERVER_PORT-}:80
+    volumes:
+      - .:/var/www/html
+  mocha:
+    image: blueimp/mocha-chrome
+    command: http://example/test
+    environment:
+      - WAIT_FOR_HOSTS=example:80
+    depends_on:
+      - example
+  chromedriver:
+    image: blueimp/chromedriver
+    init: true
+    tmpfs: /tmp
+    environment:
+      - DISABLE_X11=false
+      - ENABLE_VNC=true
+      - EXPOSE_X11=true
+    volumes:
+      - ./wdio/assets:/home/webdriver/assets:ro
+    ports:
+      - 127.0.0.1:5900:5900
+  geckodriver:
+    image: blueimp/geckodriver
+    init: true
+    tmpfs: /tmp
+    shm_size: 2g
+    environment:
+      - DISABLE_X11=false
+      - ENABLE_VNC=true
+      - EXPOSE_X11=true
+    volumes:
+      - ./wdio/assets:/home/webdriver/assets:ro
+    ports:
+      - 127.0.0.1:5901:5900
+  wdio:
+    image: blueimp/wdio
+    init: true
+    read_only: true
+    tmpfs:
+      - /tmp
+    environment:
+      - WAIT_FOR_HOSTS= chromedriver:4444 geckodriver:4444 example:80
+      - WINDOWS_HOST
+      - MACOS_ASSETS_DIR=$PWD/wdio/assets/
+      - WINDOWS_ASSETS_DIR
+    volumes:
+      - ./wdio:/opt:ro
+      - ./wdio/reports:/opt/reports
+    depends_on:
+      - chromedriver
+      - geckodriver
+      - example

vendor/blueimp/jquery-file-upload/index.html

@@ -0,0 +1,332 @@
+<!DOCTYPE html>
+<!--
+/*
+ * jQuery File Upload Demo
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+-->
+<html lang="en">
+  <head>
+    <!-- Force latest IE rendering engine or ChromeFrame if installed -->
+    <!--[if IE]>
+      <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
+    <![endif]-->
+    <meta charset="utf-8" />
+    <title>jQuery File Upload Demo</title>
+    <meta
+      name="description"
+      content="File Upload widget with multiple file selection, drag&amp;drop support, progress bars, validation and preview images, audio and video for jQuery. Supports cross-domain, chunked and resumable file uploads and client-side image resizing. Works with any server-side platform (PHP, Python, Ruby on Rails, Java, Node.js, Go etc.) that supports standard HTML form file uploads."
+    />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <!-- Bootstrap styles -->
+    <link
+      rel="stylesheet"
+      href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"
+      integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u"
+      crossorigin="anonymous"
+    />
+    <!-- Generic page styles -->
+    <style>
+      #navigation {
+        margin: 10px 0;
+      }
+      @media (max-width: 767px) {
+        #title,
+        #description {
+          display: none;
+        }
+      }
+    </style>
+    <!-- blueimp Gallery styles -->
+    <link
+      rel="stylesheet"
+      href="https://blueimp.github.io/Gallery/css/blueimp-gallery.min.css"
+    />
+    <!-- CSS to style the file input field as button and adjust the Bootstrap progress bars -->
+    <link rel="stylesheet" href="css/jquery.fileupload.css" />
+    <link rel="stylesheet" href="css/jquery.fileupload-ui.css" />
+    <!-- CSS adjustments for browsers with JavaScript disabled -->
+    <noscript
+      ><link rel="stylesheet" href="css/jquery.fileupload-noscript.css"
+    /></noscript>
+    <noscript
+      ><link rel="stylesheet" href="css/jquery.fileupload-ui-noscript.css"
+    /></noscript>
+  </head>
+  <body>
+    <div class="container">
+      <ul class="nav nav-tabs" id="navigation">
+        <li>
+          <a href="https://github.com/blueimp/jQuery-File-Upload">Project</a>
+        </li>
+        <li class="active">
+          <a href="#">Demo</a>
+        </li>
+        <li>
+          <a href="https://github.com/blueimp/jQuery-File-Upload/wiki">Wiki</a>
+        </li>
+        <li>
+          <a href="https://blueimp.net">Author</a>
+        </li>
+      </ul>
+      <h1 id="title">jQuery File Upload Demo</h1>
+      <blockquote id="description">
+        <p>
+          File Upload widget with multiple file selection, drag&amp;drop
+          support, progress bars, validation and preview images, audio and video
+          for jQuery.<br />
+          Supports cross-domain, chunked and resumable file uploads and
+          client-side image resizing.<br />
+          Works with any server-side platform (PHP, Python, Ruby on Rails, Java,
+          Node.js, Go etc.) that supports standard HTML form file uploads.
+        </p>
+      </blockquote>
+      <!-- The file upload form used as target for the file upload widget -->
+      <form
+        id="fileupload"
+        action="https://jquery-file-upload.appspot.com/"
+        method="POST"
+        enctype="multipart/form-data"
+      >
+        <!-- Redirect browsers with JavaScript disabled to the origin page -->
+        <noscript
+          ><input
+            type="hidden"
+            name="redirect"
+            value="https://blueimp.github.io/jQuery-File-Upload/"
+        /></noscript>
+        <!-- The fileupload-buttonbar contains buttons to add/delete files and start/cancel the upload -->
+        <div class="row fileupload-buttonbar">
+          <div class="col-lg-7">
+            <!-- The fileinput-button span is used to style the file input field as button -->
+            <span class="btn btn-success fileinput-button">
+              <i class="glyphicon glyphicon-plus"></i>
+              <span>Add files...</span>
+              <input type="file" name="files[]" multiple />
+            </span>
+            <button type="submit" class="btn btn-primary start">
+              <i class="glyphicon glyphicon-upload"></i>
+              <span>Start upload</span>
+            </button>
+            <button type="reset" class="btn btn-warning cancel">
+              <i class="glyphicon glyphicon-ban-circle"></i>
+              <span>Cancel upload</span>
+            </button>
+            <button type="button" class="btn btn-danger delete">
+              <i class="glyphicon glyphicon-trash"></i>
+              <span>Delete selected</span>
+            </button>
+            <input type="checkbox" class="toggle" />
+            <!-- The global file processing state -->
+            <span class="fileupload-process"></span>
+          </div>
+          <!-- The global progress state -->
+          <div class="col-lg-5 fileupload-progress fade">
+            <!-- The global progress bar -->
+            <div
+              class="progress progress-striped active"
+              role="progressbar"
+              aria-valuemin="0"
+              aria-valuemax="100"
+            >
+              <div
+                class="progress-bar progress-bar-success"
+                style="width: 0%;"
+              ></div>
+            </div>
+            <!-- The extended global progress state -->
+            <div class="progress-extended">&nbsp;</div>
+          </div>
+        </div>
+        <!-- The table listing the files available for upload/download -->
+        <table role="presentation" class="table table-striped">
+          <tbody class="files"></tbody>
+        </table>
+      </form>
+      <div class="panel panel-default">
+        <div class="panel-heading">
+          <h3 class="panel-title">Demo Notes</h3>
+        </div>
+        <div class="panel-body">
+          <ul>
+            <li>
+              The maximum file size for uploads in this demo is
+              <strong>999 KB</strong> (default file size is unlimited).
+            </li>
+            <li>
+              Only image files (<strong>JPG, GIF, PNG</strong>) are allowed in
+              this demo (by default there is no file type restriction).
+            </li>
+            <li>
+              Uploaded files will be deleted automatically after
+              <strong>5 minutes or less</strong> (demo files are stored in
+              memory).
+            </li>
+            <li>
+              You can <strong>drag &amp; drop</strong> files from your desktop
+              on this webpage (see
+              <a
+                href="https://github.com/blueimp/jQuery-File-Upload/wiki/Browser-support"
+                >Browser support</a
+              >).
+            </li>
+            <li>
+              Please refer to the
+              <a href="https://github.com/blueimp/jQuery-File-Upload"
+                >project website</a
+              >
+              and
+              <a href="https://github.com/blueimp/jQuery-File-Upload/wiki"
+                >documentation</a
+              >
+              for more information.
+            </li>
+            <li>
+              Built with the
+              <a href="https://getbootstrap.com/">Bootstrap</a> CSS framework
+              and Icons from <a href="https://glyphicons.com/">Glyphicons</a>.
+            </li>
+          </ul>
+        </div>
+      </div>
+    </div>
+    <!-- The blueimp Gallery widget -->
+    <div
+      id="blueimp-gallery"
+      class="blueimp-gallery blueimp-gallery-controls"
+      data-filter=":even"
+    >
+      <div class="slides"></div>
+      <h3 class="title"></h3>
+      <a class="prev">‹</a>
+      <a class="next">›</a>
+      <a class="close">×</a>
+      <a class="play-pause"></a>
+      <ol class="indicator"></ol>
+    </div>
+    <!-- The template to display files available for upload -->
+    <script id="template-upload" type="text/x-tmpl">
+      {% for (var i=0, file; file=o.files[i]; i++) { %}
+          <tr class="template-upload fade{%=o.options.loadImageFileTypes.test(file.type)?' image':''%}">
+              <td>
+                  <span class="preview"></span>
+              </td>
+              <td>
+                  <p class="name">{%=file.name%}</p>
+                  <strong class="error text-danger"></strong>
+              </td>
+              <td>
+                  <p class="size">Processing...</p>
+                  <div class="progress progress-striped active" role="progressbar" aria-valuemin="0" aria-valuemax="100" aria-valuenow="0"><div class="progress-bar progress-bar-success" style="width:0%;"></div></div>
+              </td>
+              <td>
+                  {% if (!o.options.autoUpload && o.options.edit && o.options.loadImageFileTypes.test(file.type)) { %}
+                    <button class="btn btn-success edit" data-index="{%=i%}" disabled>
+                        <i class="glyphicon glyphicon-edit"></i>
+                        <span>Edit</span>
+                    </button>
+                  {% } %}
+                  {% if (!i && !o.options.autoUpload) { %}
+                      <button class="btn btn-primary start" disabled>
+                          <i class="glyphicon glyphicon-upload"></i>
+                          <span>Start</span>
+                      </button>
+                  {% } %}
+                  {% if (!i) { %}
+                      <button class="btn btn-warning cancel">
+                          <i class="glyphicon glyphicon-ban-circle"></i>
+                          <span>Cancel</span>
+                      </button>
+                  {% } %}
+              </td>
+          </tr>
+      {% } %}
+    </script>
+    <!-- The template to display files available for download -->
+    <script id="template-download" type="text/x-tmpl">
+      {% for (var i=0, file; file=o.files[i]; i++) { %}
+          <tr class="template-download fade{%=file.thumbnailUrl?' image':''%}">
+              <td>
+                  <span class="preview">
+                      {% if (file.thumbnailUrl) { %}
+                          <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" data-gallery><img src="{%=file.thumbnailUrl%}"></a>
+                      {% } %}
+                  </span>
+              </td>
+              <td>
+                  <p class="name">
+                      {% if (file.url) { %}
+                          <a href="{%=file.url%}" title="{%=file.name%}" download="{%=file.name%}" {%=file.thumbnailUrl?'data-gallery':''%}>{%=file.name%}</a>
+                      {% } else { %}
+                          <span>{%=file.name%}</span>
+                      {% } %}
+                  </p>
+                  {% if (file.error) { %}
+                      <div><span class="label label-danger">Error</span> {%=file.error%}</div>
+                  {% } %}
+              </td>
+              <td>
+                  <span class="size">{%=o.formatFileSize(file.size)%}</span>
+              </td>
+              <td>
+                  {% if (file.deleteUrl) { %}
+                      <button class="btn btn-danger delete" data-type="{%=file.deleteType%}" data-url="{%=file.deleteUrl%}"{% if (file.deleteWithCredentials) { %} data-xhr-fields='{"withCredentials":true}'{% } %}>
+                          <i class="glyphicon glyphicon-trash"></i>
+                          <span>Delete</span>
+                      </button>
+                      <input type="checkbox" name="delete" value="1" class="toggle">
+                  {% } else { %}
+                      <button class="btn btn-warning cancel">
+                          <i class="glyphicon glyphicon-ban-circle"></i>
+                          <span>Cancel</span>
+                      </button>
+                  {% } %}
+              </td>
+          </tr>
+      {% } %}
+    </script>
+    <script
+      src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"
+      integrity="sha384-nvAa0+6Qg9clwYCGGPpDQLVpLNn0fRaROjHqs13t4Ggj3Ez50XnGQqc/r8MhnRDZ"
+      crossorigin="anonymous"
+    ></script>
+    <!-- The jQuery UI widget factory, can be omitted if jQuery UI is already included -->
+    <script src="js/vendor/jquery.ui.widget.js"></script>
+    <!-- The Templates plugin is included to render the upload/download listings -->
+    <script src="https://blueimp.github.io/JavaScript-Templates/js/tmpl.min.js"></script>
+    <!-- The Load Image plugin is included for the preview images and image resizing functionality -->
+    <script src="https://blueimp.github.io/JavaScript-Load-Image/js/load-image.all.min.js"></script>
+    <!-- The Canvas to Blob plugin is included for image resizing functionality -->
+    <script src="https://blueimp.github.io/JavaScript-Canvas-to-Blob/js/canvas-to-blob.min.js"></script>
+    <!-- blueimp Gallery script -->
+    <script src="https://blueimp.github.io/Gallery/js/jquery.blueimp-gallery.min.js"></script>
+    <!-- The Iframe Transport is required for browsers without support for XHR file uploads -->
+    <script src="js/jquery.iframe-transport.js"></script>
+    <!-- The basic File Upload plugin -->
+    <script src="js/jquery.fileupload.js"></script>
+    <!-- The File Upload processing plugin -->
+    <script src="js/jquery.fileupload-process.js"></script>
+    <!-- The File Upload image preview & resize plugin -->
+    <script src="js/jquery.fileupload-image.js"></script>
+    <!-- The File Upload audio preview plugin -->
+    <script src="js/jquery.fileupload-audio.js"></script>
+    <!-- The File Upload video preview plugin -->
+    <script src="js/jquery.fileupload-video.js"></script>
+    <!-- The File Upload validation plugin -->
+    <script src="js/jquery.fileupload-validate.js"></script>
+    <!-- The File Upload user interface plugin -->
+    <script src="js/jquery.fileupload-ui.js"></script>
+    <!-- The main application script -->
+    <script src="js/demo.js"></script>
+    <!-- The XDomainRequest Transport is included for cross-domain file deletion for IE 8 and IE 9 -->
+    <!--[if (gte IE 8)&(lt IE 10)]>
+      <script src="js/cors/jquery.xdr-transport.js"></script>
+    <![endif]-->
+  </body>
+</html>

vendor/blueimp/jquery-file-upload/js/cors/jquery.postmessage-transport.js

@@ -0,0 +1,126 @@
+/*
+ * jQuery postMessage Transport Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global define, require */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define(['jquery'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(require('jquery'));
+  } else {
+    // Browser globals:
+    factory(window.jQuery);
+  }
+})(function ($) {
+  'use strict';
+
+  var counter = 0,
+    names = [
+      'accepts',
+      'cache',
+      'contents',
+      'contentType',
+      'crossDomain',
+      'data',
+      'dataType',
+      'headers',
+      'ifModified',
+      'mimeType',
+      'password',
+      'processData',
+      'timeout',
+      'traditional',
+      'type',
+      'url',
+      'username'
+    ],
+    convert = function (p) {
+      return p;
+    };
+
+  $.ajaxSetup({
+    converters: {
+      'postmessage text': convert,
+      'postmessage json': convert,
+      'postmessage html': convert
+    }
+  });
+
+  $.ajaxTransport('postmessage', function (options) {
+    if (options.postMessage && window.postMessage) {
+      var iframe,
+        loc = $('<a></a>').prop('href', options.postMessage)[0],
+        target = loc.protocol + '//' + loc.host,
+        xhrUpload = options.xhr().upload;
+      // IE always includes the port for the host property of a link
+      // element, but not in the location.host or origin property for the
+      // default http port 80 and https port 443, so we strip it:
+      if (/^(http:\/\/.+:80)|(https:\/\/.+:443)$/.test(target)) {
+        target = target.replace(/:(80|443)$/, '');
+      }
+      return {
+        send: function (_, completeCallback) {
+          counter += 1;
+          var message = {
+              id: 'postmessage-transport-' + counter
+            },
+            eventName = 'message.' + message.id;
+          iframe = $(
+            '<iframe style="display:none;" src="' +
+              options.postMessage +
+              '" name="' +
+              message.id +
+              '"></iframe>'
+          )
+            .on('load', function () {
+              $.each(names, function (i, name) {
+                message[name] = options[name];
+              });
+              message.dataType = message.dataType.replace('postmessage ', '');
+              $(window).on(eventName, function (event) {
+                var e = event.originalEvent;
+                var data = e.data;
+                var ev;
+                if (e.origin === target && data.id === message.id) {
+                  if (data.type === 'progress') {
+                    ev = document.createEvent('Event');
+                    ev.initEvent(data.type, false, true);
+                    $.extend(ev, data);
+                    xhrUpload.dispatchEvent(ev);
+                  } else {
+                    completeCallback(
+                      data.status,
+                      data.statusText,
+                      { postmessage: data.result },
+                      data.headers
+                    );
+                    iframe.remove();
+                    $(window).off(eventName);
+                  }
+                }
+              });
+              iframe[0].contentWindow.postMessage(message, target);
+            })
+            .appendTo(document.body);
+        },
+        abort: function () {
+          if (iframe) {
+            iframe.remove();
+          }
+        }
+      };
+    }
+  });
+});

vendor/blueimp/jquery-file-upload/js/cors/jquery.xdr-transport.js

@@ -0,0 +1,97 @@
+/*
+ * jQuery XDomainRequest Transport Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ *
+ * Based on Julian Aubourg's ajaxHooks xdr.js:
+ * https://github.com/jaubourg/ajaxHooks/
+ */
+
+/* global define, require, XDomainRequest */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define(['jquery'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(require('jquery'));
+  } else {
+    // Browser globals:
+    factory(window.jQuery);
+  }
+})(function ($) {
+  'use strict';
+  if (window.XDomainRequest && !$.support.cors) {
+    $.ajaxTransport(function (s) {
+      if (s.crossDomain && s.async) {
+        if (s.timeout) {
+          s.xdrTimeout = s.timeout;
+          delete s.timeout;
+        }
+        var xdr;
+        return {
+          send: function (headers, completeCallback) {
+            var addParamChar = /\?/.test(s.url) ? '&' : '?';
+            /**
+             * Callback wrapper function
+             *
+             * @param {number} status HTTP status code
+             * @param {string} statusText HTTP status text
+             * @param {object} [responses] Content-type specific responses
+             * @param {string} [responseHeaders] Response headers string
+             */
+            function callback(status, statusText, responses, responseHeaders) {
+              xdr.onload = xdr.onerror = xdr.ontimeout = $.noop;
+              xdr = null;
+              completeCallback(status, statusText, responses, responseHeaders);
+            }
+            xdr = new XDomainRequest();
+            // XDomainRequest only supports GET and POST:
+            if (s.type === 'DELETE') {
+              s.url = s.url + addParamChar + '_method=DELETE';
+              s.type = 'POST';
+            } else if (s.type === 'PUT') {
+              s.url = s.url + addParamChar + '_method=PUT';
+              s.type = 'POST';
+            } else if (s.type === 'PATCH') {
+              s.url = s.url + addParamChar + '_method=PATCH';
+              s.type = 'POST';
+            }
+            xdr.open(s.type, s.url);
+            xdr.onload = function () {
+              callback(
+                200,
+                'OK',
+                { text: xdr.responseText },
+                'Content-Type: ' + xdr.contentType
+              );
+            };
+            xdr.onerror = function () {
+              callback(404, 'Not Found');
+            };
+            if (s.xdrTimeout) {
+              xdr.ontimeout = function () {
+                callback(0, 'timeout');
+              };
+              xdr.timeout = s.xdrTimeout;
+            }
+            xdr.send((s.hasContent && s.data) || null);
+          },
+          abort: function () {
+            if (xdr) {
+              xdr.onerror = $.noop();
+              xdr.abort();
+            }
+          }
+        };
+      }
+    });
+  }
+});

vendor/blueimp/jquery-file-upload/js/demo.js

@@ -0,0 +1,75 @@
+/*
+ * jQuery File Upload Demo
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global $ */
+
+$(function () {
+  'use strict';
+
+  // Initialize the jQuery File Upload widget:
+  $('#fileupload').fileupload({
+    // Uncomment the following to send cross-domain cookies:
+    //xhrFields: {withCredentials: true},
+    url: 'server/php/'
+  });
+
+  // Enable iframe cross-domain access via redirect option:
+  $('#fileupload').fileupload(
+    'option',
+    'redirect',
+    window.location.href.replace(/\/[^/]*$/, '/cors/result.html?%s')
+  );
+
+  if (window.location.hostname === 'blueimp.github.io') {
+    // Demo settings:
+    $('#fileupload').fileupload('option', {
+      url: '//jquery-file-upload.appspot.com/',
+      // Enable image resizing, except for Android and Opera,
+      // which actually support image resizing, but fail to
+      // send Blob objects via XHR requests:
+      disableImageResize: /Android(?!.*Chrome)|Opera/.test(
+        window.navigator.userAgent
+      ),
+      maxFileSize: 999000,
+      acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i
+    });
+    // Upload server status check for browsers with CORS support:
+    if ($.support.cors) {
+      $.ajax({
+        url: '//jquery-file-upload.appspot.com/',
+        type: 'HEAD'
+      }).fail(function () {
+        $('<div class="alert alert-danger"></div>')
+          .text('Upload server currently unavailable - ' + new Date())
+          .appendTo('#fileupload');
+      });
+    }
+  } else {
+    // Load existing files:
+    $('#fileupload').addClass('fileupload-processing');
+    $.ajax({
+      // Uncomment the following to send cross-domain cookies:
+      //xhrFields: {withCredentials: true},
+      url: $('#fileupload').fileupload('option', 'url'),
+      dataType: 'json',
+      context: $('#fileupload')[0]
+    })
+      .always(function () {
+        $(this).removeClass('fileupload-processing');
+      })
+      .done(function (result) {
+        $(this)
+          .fileupload('option', 'done')
+          // eslint-disable-next-line new-cap
+          .call(this, $.Event('done'), { result: result });
+      });
+  }
+});

vendor/blueimp/jquery-file-upload/js/jquery.fileupload-audio.js

@@ -0,0 +1,101 @@
+/*
+ * jQuery File Upload Audio Preview Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2013, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global define, require */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define(['jquery', 'load-image', './jquery.fileupload-process'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(
+      require('jquery'),
+      require('blueimp-load-image/js/load-image'),
+      require('./jquery.fileupload-process')
+    );
+  } else {
+    // Browser globals:
+    factory(window.jQuery, window.loadImage);
+  }
+})(function ($, loadImage) {
+  'use strict';
+
+  // Prepend to the default processQueue:
+  $.blueimp.fileupload.prototype.options.processQueue.unshift(
+    {
+      action: 'loadAudio',
+      // Use the action as prefix for the "@" options:
+      prefix: true,
+      fileTypes: '@',
+      maxFileSize: '@',
+      disabled: '@disableAudioPreview'
+    },
+    {
+      action: 'setAudio',
+      name: '@audioPreviewName',
+      disabled: '@disableAudioPreview'
+    }
+  );
+
+  // The File Upload Audio Preview plugin extends the fileupload widget
+  // with audio preview functionality:
+  $.widget('blueimp.fileupload', $.blueimp.fileupload, {
+    options: {
+      // The regular expression for the types of audio files to load,
+      // matched against the file type:
+      loadAudioFileTypes: /^audio\/.*$/
+    },
+
+    _audioElement: document.createElement('audio'),
+
+    processActions: {
+      // Loads the audio file given via data.files and data.index
+      // as audio element if the browser supports playing it.
+      // Accepts the options fileTypes (regular expression)
+      // and maxFileSize (integer) to limit the files to load:
+      loadAudio: function (data, options) {
+        if (options.disabled) {
+          return data;
+        }
+        var file = data.files[data.index],
+          url,
+          audio;
+        if (
+          this._audioElement.canPlayType &&
+          this._audioElement.canPlayType(file.type) &&
+          ($.type(options.maxFileSize) !== 'number' ||
+            file.size <= options.maxFileSize) &&
+          (!options.fileTypes || options.fileTypes.test(file.type))
+        ) {
+          url = loadImage.createObjectURL(file);
+          if (url) {
+            audio = this._audioElement.cloneNode(false);
+            audio.src = url;
+            audio.controls = true;
+            data.audio = audio;
+            return data;
+          }
+        }
+        return data;
+      },
+
+      // Sets the audio element as a property of the file object:
+      setAudio: function (data, options) {
+        if (data.audio && !options.disabled) {
+          data.files[data.index][options.name || 'preview'] = data.audio;
+        }
+        return data;
+      }
+    }
+  });
+});

vendor/blueimp/jquery-file-upload/js/jquery.fileupload-image.js

@@ -0,0 +1,355 @@
+/*
+ * jQuery File Upload Image Preview & Resize Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2013, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global define, require */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define([
+      'jquery',
+      'load-image',
+      'load-image-meta',
+      'load-image-scale',
+      'load-image-exif',
+      'load-image-orientation',
+      'canvas-to-blob',
+      './jquery.fileupload-process'
+    ], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(
+      require('jquery'),
+      require('blueimp-load-image/js/load-image'),
+      require('blueimp-load-image/js/load-image-meta'),
+      require('blueimp-load-image/js/load-image-scale'),
+      require('blueimp-load-image/js/load-image-exif'),
+      require('blueimp-load-image/js/load-image-orientation'),
+      require('blueimp-canvas-to-blob'),
+      require('./jquery.fileupload-process')
+    );
+  } else {
+    // Browser globals:
+    factory(window.jQuery, window.loadImage);
+  }
+})(function ($, loadImage) {
+  'use strict';
+
+  // Prepend to the default processQueue:
+  $.blueimp.fileupload.prototype.options.processQueue.unshift(
+    {
+      action: 'loadImageMetaData',
+      maxMetaDataSize: '@',
+      disableImageHead: '@',
+      disableMetaDataParsers: '@',
+      disableExif: '@',
+      disableExifThumbnail: '@',
+      disableExifOffsets: '@',
+      includeExifTags: '@',
+      excludeExifTags: '@',
+      disableIptc: '@',
+      disableIptcOffsets: '@',
+      includeIptcTags: '@',
+      excludeIptcTags: '@',
+      disabled: '@disableImageMetaDataLoad'
+    },
+    {
+      action: 'loadImage',
+      // Use the action as prefix for the "@" options:
+      prefix: true,
+      fileTypes: '@',
+      maxFileSize: '@',
+      noRevoke: '@',
+      disabled: '@disableImageLoad'
+    },
+    {
+      action: 'resizeImage',
+      // Use "image" as prefix for the "@" options:
+      prefix: 'image',
+      maxWidth: '@',
+      maxHeight: '@',
+      minWidth: '@',
+      minHeight: '@',
+      crop: '@',
+      orientation: '@',
+      forceResize: '@',
+      disabled: '@disableImageResize'
+    },
+    {
+      action: 'saveImage',
+      quality: '@imageQuality',
+      type: '@imageType',
+      disabled: '@disableImageResize'
+    },
+    {
+      action: 'saveImageMetaData',
+      disabled: '@disableImageMetaDataSave'
+    },
+    {
+      action: 'resizeImage',
+      // Use "preview" as prefix for the "@" options:
+      prefix: 'preview',
+      maxWidth: '@',
+      maxHeight: '@',
+      minWidth: '@',
+      minHeight: '@',
+      crop: '@',
+      orientation: '@',
+      thumbnail: '@',
+      canvas: '@',
+      disabled: '@disableImagePreview'
+    },
+    {
+      action: 'setImage',
+      name: '@imagePreviewName',
+      disabled: '@disableImagePreview'
+    },
+    {
+      action: 'deleteImageReferences',
+      disabled: '@disableImageReferencesDeletion'
+    }
+  );
+
+  // The File Upload Resize plugin extends the fileupload widget
+  // with image resize functionality:
+  $.widget('blueimp.fileupload', $.blueimp.fileupload, {
+    options: {
+      // The regular expression for the types of images to load:
+      // matched against the file type:
+      loadImageFileTypes: /^image\/(gif|jpeg|png|svg\+xml)$/,
+      // The maximum file size of images to load:
+      loadImageMaxFileSize: 10000000, // 10MB
+      // The maximum width of resized images:
+      imageMaxWidth: 1920,
+      // The maximum height of resized images:
+      imageMaxHeight: 1080,
+      // Defines the image orientation (1-8) or takes the orientation
+      // value from Exif data if set to true:
+      imageOrientation: true,
+      // Define if resized images should be cropped or only scaled:
+      imageCrop: false,
+      // Disable the resize image functionality by default:
+      disableImageResize: true,
+      // The maximum width of the preview images:
+      previewMaxWidth: 80,
+      // The maximum height of the preview images:
+      previewMaxHeight: 80,
+      // Defines the preview orientation (1-8) or takes the orientation
+      // value from Exif data if set to true:
+      previewOrientation: true,
+      // Create the preview using the Exif data thumbnail:
+      previewThumbnail: true,
+      // Define if preview images should be cropped or only scaled:
+      previewCrop: false,
+      // Define if preview images should be resized as canvas elements:
+      previewCanvas: true
+    },
+
+    processActions: {
+      // Loads the image given via data.files and data.index
+      // as img element, if the browser supports the File API.
+      // Accepts the options fileTypes (regular expression)
+      // and maxFileSize (integer) to limit the files to load:
+      loadImage: function (data, options) {
+        if (options.disabled) {
+          return data;
+        }
+        var that = this,
+          file = data.files[data.index],
+          // eslint-disable-next-line new-cap
+          dfd = $.Deferred();
+        if (
+          ($.type(options.maxFileSize) === 'number' &&
+            file.size > options.maxFileSize) ||
+          (options.fileTypes && !options.fileTypes.test(file.type)) ||
+          !loadImage(
+            file,
+            function (img) {
+              if (img.src) {
+                data.img = img;
+              }
+              dfd.resolveWith(that, [data]);
+            },
+            options
+          )
+        ) {
+          return data;
+        }
+        return dfd.promise();
+      },
+
+      // Resizes the image given as data.canvas or data.img
+      // and updates data.canvas or data.img with the resized image.
+      // Also stores the resized image as preview property.
+      // Accepts the options maxWidth, maxHeight, minWidth,
+      // minHeight, canvas and crop:
+      resizeImage: function (data, options) {
+        if (options.disabled || !(data.canvas || data.img)) {
+          return data;
+        }
+        // eslint-disable-next-line no-param-reassign
+        options = $.extend({ canvas: true }, options);
+        var that = this,
+          // eslint-disable-next-line new-cap
+          dfd = $.Deferred(),
+          img = (options.canvas && data.canvas) || data.img,
+          resolve = function (newImg) {
+            if (
+              newImg &&
+              (newImg.width !== img.width ||
+                newImg.height !== img.height ||
+                options.forceResize)
+            ) {
+              data[newImg.getContext ? 'canvas' : 'img'] = newImg;
+            }
+            data.preview = newImg;
+            dfd.resolveWith(that, [data]);
+          },
+          thumbnail,
+          thumbnailBlob;
+        if (data.exif) {
+          if (options.orientation === true) {
+            options.orientation = data.exif.get('Orientation');
+          }
+          if (options.thumbnail) {
+            thumbnail = data.exif.get('Thumbnail');
+            thumbnailBlob = thumbnail && thumbnail.get('Blob');
+            if (thumbnailBlob) {
+              loadImage(thumbnailBlob, resolve, options);
+              return dfd.promise();
+            }
+          }
+          // Prevent orienting browser oriented images:
+          if (loadImage.orientation) {
+            data.orientation = data.orientation || options.orientation;
+          }
+          // Prevent orienting the same image twice:
+          if (data.orientation) {
+            delete options.orientation;
+          } else {
+            data.orientation = options.orientation;
+          }
+        }
+        if (img) {
+          resolve(loadImage.scale(img, options));
+          return dfd.promise();
+        }
+        return data;
+      },
+
+      // Saves the processed image given as data.canvas
+      // inplace at data.index of data.files:
+      saveImage: function (data, options) {
+        if (!data.canvas || options.disabled) {
+          return data;
+        }
+        var that = this,
+          file = data.files[data.index],
+          // eslint-disable-next-line new-cap
+          dfd = $.Deferred();
+        if (data.canvas.toBlob) {
+          data.canvas.toBlob(
+            function (blob) {
+              if (!blob.name) {
+                if (file.type === blob.type) {
+                  blob.name = file.name;
+                } else if (file.name) {
+                  blob.name = file.name.replace(
+                    /\.\w+$/,
+                    '.' + blob.type.substr(6)
+                  );
+                }
+              }
+              // Don't restore invalid meta data:
+              if (file.type !== blob.type) {
+                delete data.imageHead;
+              }
+              // Store the created blob at the position
+              // of the original file in the files list:
+              data.files[data.index] = blob;
+              dfd.resolveWith(that, [data]);
+            },
+            options.type || file.type,
+            options.quality
+          );
+        } else {
+          return data;
+        }
+        return dfd.promise();
+      },
+
+      loadImageMetaData: function (data, options) {
+        if (options.disabled) {
+          return data;
+        }
+        var that = this,
+          // eslint-disable-next-line new-cap
+          dfd = $.Deferred();
+        loadImage.parseMetaData(
+          data.files[data.index],
+          function (result) {
+            $.extend(data, result);
+            dfd.resolveWith(that, [data]);
+          },
+          options
+        );
+        return dfd.promise();
+      },
+
+      saveImageMetaData: function (data, options) {
+        if (
+          !(
+            data.imageHead &&
+            data.canvas &&
+            data.canvas.toBlob &&
+            !options.disabled
+          )
+        ) {
+          return data;
+        }
+        var that = this,
+          file = data.files[data.index],
+          // eslint-disable-next-line new-cap
+          dfd = $.Deferred();
+        if (data.orientation && data.exifOffsets) {
+          // Reset Exif Orientation data:
+          loadImage.writeExifData(data.imageHead, data, 'Orientation', 1);
+        }
+        loadImage.replaceHead(file, data.imageHead, function (blob) {
+          blob.name = file.name;
+          data.files[data.index] = blob;
+          dfd.resolveWith(that, [data]);
+        });
+        return dfd.promise();
+      },
+
+      // Sets the resized version of the image as a property of the
+      // file object, must be called after "saveImage":
+      setImage: function (data, options) {
+        if (data.preview && !options.disabled) {
+          data.files[data.index][options.name || 'preview'] = data.preview;
+        }
+        return data;
+      },
+
+      deleteImageReferences: function (data, options) {
+        if (!options.disabled) {
+          delete data.img;
+          delete data.canvas;
+          delete data.preview;
+          delete data.imageHead;
+        }
+        return data;
+      }
+    }
+  });
+});

vendor/blueimp/jquery-file-upload/js/jquery.fileupload-process.js

@@ -0,0 +1,170 @@
+/*
+ * jQuery File Upload Processing Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2012, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global define, require */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define(['jquery', './jquery.fileupload'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(require('jquery'), require('./jquery.fileupload'));
+  } else {
+    // Browser globals:
+    factory(window.jQuery);
+  }
+})(function ($) {
+  'use strict';
+
+  var originalAdd = $.blueimp.fileupload.prototype.options.add;
+
+  // The File Upload Processing plugin extends the fileupload widget
+  // with file processing functionality:
+  $.widget('blueimp.fileupload', $.blueimp.fileupload, {
+    options: {
+      // The list of processing actions:
+      processQueue: [
+        /*
+                {
+                    action: 'log',
+                    type: 'debug'
+                }
+                */
+      ],
+      add: function (e, data) {
+        var $this = $(this);
+        data.process(function () {
+          return $this.fileupload('process', data);
+        });
+        originalAdd.call(this, e, data);
+      }
+    },
+
+    processActions: {
+      /*
+            log: function (data, options) {
+                console[options.type](
+                    'Processing "' + data.files[data.index].name + '"'
+                );
+            }
+            */
+    },
+
+    _processFile: function (data, originalData) {
+      var that = this,
+        // eslint-disable-next-line new-cap
+        dfd = $.Deferred().resolveWith(that, [data]),
+        chain = dfd.promise();
+      this._trigger('process', null, data);
+      $.each(data.processQueue, function (i, settings) {
+        var func = function (data) {
+          if (originalData.errorThrown) {
+            // eslint-disable-next-line new-cap
+            return $.Deferred().rejectWith(that, [originalData]).promise();
+          }
+          return that.processActions[settings.action].call(
+            that,
+            data,
+            settings
+          );
+        };
+        chain = chain[that._promisePipe](func, settings.always && func);
+      });
+      chain
+        .done(function () {
+          that._trigger('processdone', null, data);
+          that._trigger('processalways', null, data);
+        })
+        .fail(function () {
+          that._trigger('processfail', null, data);
+          that._trigger('processalways', null, data);
+        });
+      return chain;
+    },
+
+    // Replaces the settings of each processQueue item that
+    // are strings starting with an "@", using the remaining
+    // substring as key for the option map,
+    // e.g. "@autoUpload" is replaced with options.autoUpload:
+    _transformProcessQueue: function (options) {
+      var processQueue = [];
+      $.each(options.processQueue, function () {
+        var settings = {},
+          action = this.action,
+          prefix = this.prefix === true ? action : this.prefix;
+        $.each(this, function (key, value) {
+          if ($.type(value) === 'string' && value.charAt(0) === '@') {
+            settings[key] =
+              options[
+                value.slice(1) ||
+                  (prefix
+                    ? prefix + key.charAt(0).toUpperCase() + key.slice(1)
+                    : key)
+              ];
+          } else {
+            settings[key] = value;
+          }
+        });
+        processQueue.push(settings);
+      });
+      options.processQueue = processQueue;
+    },
+
+    // Returns the number of files currently in the processsing queue:
+    processing: function () {
+      return this._processing;
+    },
+
+    // Processes the files given as files property of the data parameter,
+    // returns a Promise object that allows to bind callbacks:
+    process: function (data) {
+      var that = this,
+        options = $.extend({}, this.options, data);
+      if (options.processQueue && options.processQueue.length) {
+        this._transformProcessQueue(options);
+        if (this._processing === 0) {
+          this._trigger('processstart');
+        }
+        $.each(data.files, function (index) {
+          var opts = index ? $.extend({}, options) : options,
+            func = function () {
+              if (data.errorThrown) {
+                // eslint-disable-next-line new-cap
+                return $.Deferred().rejectWith(that, [data]).promise();
+              }
+              return that._processFile(opts, data);
+            };
+          opts.index = index;
+          that._processing += 1;
+          that._processingQueue = that._processingQueue[that._promisePipe](
+            func,
+            func
+          ).always(function () {
+            that._processing -= 1;
+            if (that._processing === 0) {
+              that._trigger('processstop');
+            }
+          });
+        });
+      }
+      return this._processingQueue;
+    },
+
+    _create: function () {
+      this._super();
+      this._processing = 0;
+      // eslint-disable-next-line new-cap
+      this._processingQueue = $.Deferred().resolveWith(this).promise();
+    }
+  });
+});

vendor/blueimp/jquery-file-upload/js/jquery.fileupload-ui.js

@@ -0,0 +1,759 @@
+/*
+ * jQuery File Upload User Interface Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global define, require */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define([
+      'jquery',
+      'blueimp-tmpl',
+      './jquery.fileupload-image',
+      './jquery.fileupload-audio',
+      './jquery.fileupload-video',
+      './jquery.fileupload-validate'
+    ], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(
+      require('jquery'),
+      require('blueimp-tmpl'),
+      require('./jquery.fileupload-image'),
+      require('./jquery.fileupload-audio'),
+      require('./jquery.fileupload-video'),
+      require('./jquery.fileupload-validate')
+    );
+  } else {
+    // Browser globals:
+    factory(window.jQuery, window.tmpl);
+  }
+})(function ($, tmpl) {
+  'use strict';
+
+  $.blueimp.fileupload.prototype._specialOptions.push(
+    'filesContainer',
+    'uploadTemplateId',
+    'downloadTemplateId'
+  );
+
+  // The UI version extends the file upload widget
+  // and adds complete user interface interaction:
+  $.widget('blueimp.fileupload', $.blueimp.fileupload, {
+    options: {
+      // By default, files added to the widget are uploaded as soon
+      // as the user clicks on the start buttons. To enable automatic
+      // uploads, set the following option to true:
+      autoUpload: false,
+      // The class to show/hide UI elements:
+      showElementClass: 'in',
+      // The ID of the upload template:
+      uploadTemplateId: 'template-upload',
+      // The ID of the download template:
+      downloadTemplateId: 'template-download',
+      // The container for the list of files. If undefined, it is set to
+      // an element with class "files" inside of the widget element:
+      filesContainer: undefined,
+      // By default, files are appended to the files container.
+      // Set the following option to true, to prepend files instead:
+      prependFiles: false,
+      // The expected data type of the upload response, sets the dataType
+      // option of the $.ajax upload requests:
+      dataType: 'json',
+
+      // Error and info messages:
+      messages: {
+        unknownError: 'Unknown error'
+      },
+
+      // Function returning the current number of files,
+      // used by the maxNumberOfFiles validation:
+      getNumberOfFiles: function () {
+        return this.filesContainer.children().not('.processing').length;
+      },
+
+      // Callback to retrieve the list of files from the server response:
+      getFilesFromResponse: function (data) {
+        if (data.result && $.isArray(data.result.files)) {
+          return data.result.files;
+        }
+        return [];
+      },
+
+      // The add callback is invoked as soon as files are added to the fileupload
+      // widget (via file input selection, drag & drop or add API call).
+      // See the basic file upload widget for more information:
+      add: function (e, data) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var $this = $(this),
+          that = $this.data('blueimp-fileupload') || $this.data('fileupload'),
+          options = that.options;
+        data.context = that
+          ._renderUpload(data.files)
+          .data('data', data)
+          .addClass('processing');
+        options.filesContainer[options.prependFiles ? 'prepend' : 'append'](
+          data.context
+        );
+        that._forceReflow(data.context);
+        that._transition(data.context);
+        data
+          .process(function () {
+            return $this.fileupload('process', data);
+          })
+          .always(function () {
+            data.context
+              .each(function (index) {
+                $(this)
+                  .find('.size')
+                  .text(that._formatFileSize(data.files[index].size));
+              })
+              .removeClass('processing');
+            that._renderPreviews(data);
+          })
+          .done(function () {
+            data.context.find('.edit,.start').prop('disabled', false);
+            if (
+              that._trigger('added', e, data) !== false &&
+              (options.autoUpload || data.autoUpload) &&
+              data.autoUpload !== false
+            ) {
+              data.submit();
+            }
+          })
+          .fail(function () {
+            if (data.files.error) {
+              data.context.each(function (index) {
+                var error = data.files[index].error;
+                if (error) {
+                  $(this).find('.error').text(error);
+                }
+              });
+            }
+          });
+      },
+      // Callback for the start of each file upload request:
+      send: function (e, data) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var that =
+          $(this).data('blueimp-fileupload') || $(this).data('fileupload');
+        if (
+          data.context &&
+          data.dataType &&
+          data.dataType.substr(0, 6) === 'iframe'
+        ) {
+          // Iframe Transport does not support progress events.
+          // In lack of an indeterminate progress bar, we set
+          // the progress to 100%, showing the full animated bar:
+          data.context
+            .find('.progress')
+            .addClass(!$.support.transition && 'progress-animated')
+            .attr('aria-valuenow', 100)
+            .children()
+            .first()
+            .css('width', '100%');
+        }
+        return that._trigger('sent', e, data);
+      },
+      // Callback for successful uploads:
+      done: function (e, data) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var that =
+            $(this).data('blueimp-fileupload') || $(this).data('fileupload'),
+          getFilesFromResponse =
+            data.getFilesFromResponse || that.options.getFilesFromResponse,
+          files = getFilesFromResponse(data),
+          template,
+          deferred;
+        if (data.context) {
+          data.context.each(function (index) {
+            var file = files[index] || { error: 'Empty file upload result' };
+            deferred = that._addFinishedDeferreds();
+            that._transition($(this)).done(function () {
+              var node = $(this);
+              template = that._renderDownload([file]).replaceAll(node);
+              that._forceReflow(template);
+              that._transition(template).done(function () {
+                data.context = $(this);
+                that._trigger('completed', e, data);
+                that._trigger('finished', e, data);
+                deferred.resolve();
+              });
+            });
+          });
+        } else {
+          template = that
+            ._renderDownload(files)
+            [that.options.prependFiles ? 'prependTo' : 'appendTo'](
+              that.options.filesContainer
+            );
+          that._forceReflow(template);
+          deferred = that._addFinishedDeferreds();
+          that._transition(template).done(function () {
+            data.context = $(this);
+            that._trigger('completed', e, data);
+            that._trigger('finished', e, data);
+            deferred.resolve();
+          });
+        }
+      },
+      // Callback for failed (abort or error) uploads:
+      fail: function (e, data) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var that =
+            $(this).data('blueimp-fileupload') || $(this).data('fileupload'),
+          template,
+          deferred;
+        if (data.context) {
+          data.context.each(function (index) {
+            if (data.errorThrown !== 'abort') {
+              var file = data.files[index];
+              file.error =
+                file.error || data.errorThrown || data.i18n('unknownError');
+              deferred = that._addFinishedDeferreds();
+              that._transition($(this)).done(function () {
+                var node = $(this);
+                template = that._renderDownload([file]).replaceAll(node);
+                that._forceReflow(template);
+                that._transition(template).done(function () {
+                  data.context = $(this);
+                  that._trigger('failed', e, data);
+                  that._trigger('finished', e, data);
+                  deferred.resolve();
+                });
+              });
+            } else {
+              deferred = that._addFinishedDeferreds();
+              that._transition($(this)).done(function () {
+                $(this).remove();
+                that._trigger('failed', e, data);
+                that._trigger('finished', e, data);
+                deferred.resolve();
+              });
+            }
+          });
+        } else if (data.errorThrown !== 'abort') {
+          data.context = that
+            ._renderUpload(data.files)
+            [that.options.prependFiles ? 'prependTo' : 'appendTo'](
+              that.options.filesContainer
+            )
+            .data('data', data);
+          that._forceReflow(data.context);
+          deferred = that._addFinishedDeferreds();
+          that._transition(data.context).done(function () {
+            data.context = $(this);
+            that._trigger('failed', e, data);
+            that._trigger('finished', e, data);
+            deferred.resolve();
+          });
+        } else {
+          that._trigger('failed', e, data);
+          that._trigger('finished', e, data);
+          that._addFinishedDeferreds().resolve();
+        }
+      },
+      // Callback for upload progress events:
+      progress: function (e, data) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var progress = Math.floor((data.loaded / data.total) * 100);
+        if (data.context) {
+          data.context.each(function () {
+            $(this)
+              .find('.progress')
+              .attr('aria-valuenow', progress)
+              .children()
+              .first()
+              .css('width', progress + '%');
+          });
+        }
+      },
+      // Callback for global upload progress events:
+      progressall: function (e, data) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var $this = $(this),
+          progress = Math.floor((data.loaded / data.total) * 100),
+          globalProgressNode = $this.find('.fileupload-progress'),
+          extendedProgressNode = globalProgressNode.find('.progress-extended');
+        if (extendedProgressNode.length) {
+          extendedProgressNode.html(
+            (
+              $this.data('blueimp-fileupload') || $this.data('fileupload')
+            )._renderExtendedProgress(data)
+          );
+        }
+        globalProgressNode
+          .find('.progress')
+          .attr('aria-valuenow', progress)
+          .children()
+          .first()
+          .css('width', progress + '%');
+      },
+      // Callback for uploads start, equivalent to the global ajaxStart event:
+      start: function (e) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var that =
+          $(this).data('blueimp-fileupload') || $(this).data('fileupload');
+        that._resetFinishedDeferreds();
+        that
+          ._transition($(this).find('.fileupload-progress'))
+          .done(function () {
+            that._trigger('started', e);
+          });
+      },
+      // Callback for uploads stop, equivalent to the global ajaxStop event:
+      stop: function (e) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var that =
+            $(this).data('blueimp-fileupload') || $(this).data('fileupload'),
+          deferred = that._addFinishedDeferreds();
+        $.when.apply($, that._getFinishedDeferreds()).done(function () {
+          that._trigger('stopped', e);
+        });
+        that
+          ._transition($(this).find('.fileupload-progress'))
+          .done(function () {
+            $(this)
+              .find('.progress')
+              .attr('aria-valuenow', '0')
+              .children()
+              .first()
+              .css('width', '0%');
+            $(this).find('.progress-extended').html(' ');
+            deferred.resolve();
+          });
+      },
+      processstart: function (e) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        $(this).addClass('fileupload-processing');
+      },
+      processstop: function (e) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        $(this).removeClass('fileupload-processing');
+      },
+      // Callback for file deletion:
+      destroy: function (e, data) {
+        if (e.isDefaultPrevented()) {
+          return false;
+        }
+        var that =
+            $(this).data('blueimp-fileupload') || $(this).data('fileupload'),
+          removeNode = function () {
+            that._transition(data.context).done(function () {
+              $(this).remove();
+              that._trigger('destroyed', e, data);
+            });
+          };
+        if (data.url) {
+          data.dataType = data.dataType || that.options.dataType;
+          $.ajax(data)
+            .done(removeNode)
+            .fail(function () {
+              that._trigger('destroyfailed', e, data);
+            });
+        } else {
+          removeNode();
+        }
+      }
+    },
+
+    _resetFinishedDeferreds: function () {
+      this._finishedUploads = [];
+    },
+
+    _addFinishedDeferreds: function (deferred) {
+      // eslint-disable-next-line new-cap
+      var promise = deferred || $.Deferred();
+      this._finishedUploads.push(promise);
+      return promise;
+    },
+
+    _getFinishedDeferreds: function () {
+      return this._finishedUploads;
+    },
+
+    // Link handler, that allows to download files
+    // by drag & drop of the links to the desktop:
+    _enableDragToDesktop: function () {
+      var link = $(this),
+        url = link.prop('href'),
+        name = link.prop('download'),
+        type = 'application/octet-stream';
+      link.on('dragstart', function (e) {
+        try {
+          e.originalEvent.dataTransfer.setData(
+            'DownloadURL',
+            [type, name, url].join(':')
+          );
+        } catch (ignore) {
+          // Ignore exceptions
+        }
+      });
+    },
+
+    _formatFileSize: function (bytes) {
+      if (typeof bytes !== 'number') {
+        return '';
+      }
+      if (bytes >= 1000000000) {
+        return (bytes / 1000000000).toFixed(2) + ' GB';
+      }
+      if (bytes >= 1000000) {
+        return (bytes / 1000000).toFixed(2) + ' MB';
+      }
+      return (bytes / 1000).toFixed(2) + ' KB';
+    },
+
+    _formatBitrate: function (bits) {
+      if (typeof bits !== 'number') {
+        return '';
+      }
+      if (bits >= 1000000000) {
+        return (bits / 1000000000).toFixed(2) + ' Gbit/s';
+      }
+      if (bits >= 1000000) {
+        return (bits / 1000000).toFixed(2) + ' Mbit/s';
+      }
+      if (bits >= 1000) {
+        return (bits / 1000).toFixed(2) + ' kbit/s';
+      }
+      return bits.toFixed(2) + ' bit/s';
+    },
+
+    _formatTime: function (seconds) {
+      var date = new Date(seconds * 1000),
+        days = Math.floor(seconds / 86400);
+      days = days ? days + 'd ' : '';
+      return (
+        days +
+        ('0' + date.getUTCHours()).slice(-2) +
+        ':' +
+        ('0' + date.getUTCMinutes()).slice(-2) +
+        ':' +
+        ('0' + date.getUTCSeconds()).slice(-2)
+      );
+    },
+
+    _formatPercentage: function (floatValue) {
+      return (floatValue * 100).toFixed(2) + ' %';
+    },
+
+    _renderExtendedProgress: function (data) {
+      return (
+        this._formatBitrate(data.bitrate) +
+        ' | ' +
+        this._formatTime(((data.total - data.loaded) * 8) / data.bitrate) +
+        ' | ' +
+        this._formatPercentage(data.loaded / data.total) +
+        ' | ' +
+        this._formatFileSize(data.loaded) +
+        ' / ' +
+        this._formatFileSize(data.total)
+      );
+    },
+
+    _renderTemplate: function (func, files) {
+      if (!func) {
+        return $();
+      }
+      var result = func({
+        files: files,
+        formatFileSize: this._formatFileSize,
+        options: this.options
+      });
+      if (result instanceof $) {
+        return result;
+      }
+      return $(this.options.templatesContainer).html(result).children();
+    },
+
+    _renderPreviews: function (data) {
+      data.context.find('.preview').each(function (index, elm) {
+        $(elm).empty().append(data.files[index].preview);
+      });
+    },
+
+    _renderUpload: function (files) {
+      return this._renderTemplate(this.options.uploadTemplate, files);
+    },
+
+    _renderDownload: function (files) {
+      return this._renderTemplate(this.options.downloadTemplate, files)
+        .find('a[download]')
+        .each(this._enableDragToDesktop)
+        .end();
+    },
+
+    _editHandler: function (e) {
+      e.preventDefault();
+      if (!this.options.edit) return;
+      var that = this,
+        button = $(e.currentTarget),
+        template = button.closest('.template-upload'),
+        data = template.data('data'),
+        index = button.data().index;
+      this.options.edit(data.files[index]).then(function (file) {
+        if (!file) return;
+        data.files[index] = file;
+        data.context.addClass('processing');
+        template.find('.edit,.start').prop('disabled', true);
+        $(that.element)
+          .fileupload('process', data)
+          .always(function () {
+            template
+              .find('.size')
+              .text(that._formatFileSize(data.files[index].size));
+            data.context.removeClass('processing');
+            that._renderPreviews(data);
+          })
+          .done(function () {
+            template.find('.edit,.start').prop('disabled', false);
+          })
+          .fail(function () {
+            template.find('.edit').prop('disabled', false);
+            var error = data.files[index].error;
+            if (error) {
+              template.find('.error').text(error);
+            }
+          });
+      });
+    },
+
+    _startHandler: function (e) {
+      e.preventDefault();
+      var button = $(e.currentTarget),
+        template = button.closest('.template-upload'),
+        data = template.data('data');
+      button.prop('disabled', true);
+      if (data && data.submit) {
+        data.submit();
+      }
+    },
+
+    _cancelHandler: function (e) {
+      e.preventDefault();
+      var template = $(e.currentTarget).closest(
+          '.template-upload,.template-download'
+        ),
+        data = template.data('data') || {};
+      data.context = data.context || template;
+      if (data.abort) {
+        data.abort();
+      } else {
+        data.errorThrown = 'abort';
+        this._trigger('fail', e, data);
+      }
+    },
+
+    _deleteHandler: function (e) {
+      e.preventDefault();
+      var button = $(e.currentTarget);
+      this._trigger(
+        'destroy',
+        e,
+        $.extend(
+          {
+            context: button.closest('.template-download'),
+            type: 'DELETE'
+          },
+          button.data()
+        )
+      );
+    },
+
+    _forceReflow: function (node) {
+      return $.support.transition && node.length && node[0].offsetWidth;
+    },
+
+    _transition: function (node) {
+      // eslint-disable-next-line new-cap
+      var dfd = $.Deferred();
+      if (
+        $.support.transition &&
+        node.hasClass('fade') &&
+        node.is(':visible')
+      ) {
+        var transitionEndHandler = function (e) {
+          // Make sure we don't respond to other transition events
+          // in the container element, e.g. from button elements:
+          if (e.target === node[0]) {
+            node.off($.support.transition.end, transitionEndHandler);
+            dfd.resolveWith(node);
+          }
+        };
+        node
+          .on($.support.transition.end, transitionEndHandler)
+          .toggleClass(this.options.showElementClass);
+      } else {
+        node.toggleClass(this.options.showElementClass);
+        dfd.resolveWith(node);
+      }
+      return dfd;
+    },
+
+    _initButtonBarEventHandlers: function () {
+      var fileUploadButtonBar = this.element.find('.fileupload-buttonbar'),
+        filesList = this.options.filesContainer;
+      this._on(fileUploadButtonBar.find('.start'), {
+        click: function (e) {
+          e.preventDefault();
+          filesList.find('.start').trigger('click');
+        }
+      });
+      this._on(fileUploadButtonBar.find('.cancel'), {
+        click: function (e) {
+          e.preventDefault();
+          filesList.find('.cancel').trigger('click');
+        }
+      });
+      this._on(fileUploadButtonBar.find('.delete'), {
+        click: function (e) {
+          e.preventDefault();
+          filesList
+            .find('.toggle:checked')
+            .closest('.template-download')
+            .find('.delete')
+            .trigger('click');
+          fileUploadButtonBar.find('.toggle').prop('checked', false);
+        }
+      });
+      this._on(fileUploadButtonBar.find('.toggle'), {
+        change: function (e) {
+          filesList
+            .find('.toggle')
+            .prop('checked', $(e.currentTarget).is(':checked'));
+        }
+      });
+    },
+
+    _destroyButtonBarEventHandlers: function () {
+      this._off(
+        this.element
+          .find('.fileupload-buttonbar')
+          .find('.start, .cancel, .delete'),
+        'click'
+      );
+      this._off(this.element.find('.fileupload-buttonbar .toggle'), 'change.');
+    },
+
+    _initEventHandlers: function () {
+      this._super();
+      this._on(this.options.filesContainer, {
+        'click .edit': this._editHandler,
+        'click .start': this._startHandler,
+        'click .cancel': this._cancelHandler,
+        'click .delete': this._deleteHandler
+      });
+      this._initButtonBarEventHandlers();
+    },
+
+    _destroyEventHandlers: function () {
+      this._destroyButtonBarEventHandlers();
+      this._off(this.options.filesContainer, 'click');
+      this._super();
+    },
+
+    _enableFileInputButton: function () {
+      this.element
+        .find('.fileinput-button input')
+        .prop('disabled', false)
+        .parent()
+        .removeClass('disabled');
+    },
+
+    _disableFileInputButton: function () {
+      this.element
+        .find('.fileinput-button input')
+        .prop('disabled', true)
+        .parent()
+        .addClass('disabled');
+    },
+
+    _initTemplates: function () {
+      var options = this.options;
+      options.templatesContainer = this.document[0].createElement(
+        options.filesContainer.prop('nodeName')
+      );
+      if (tmpl) {
+        if (options.uploadTemplateId) {
+          options.uploadTemplate = tmpl(options.uploadTemplateId);
+        }
+        if (options.downloadTemplateId) {
+          options.downloadTemplate = tmpl(options.downloadTemplateId);
+        }
+      }
+    },
+
+    _initFilesContainer: function () {
+      var options = this.options;
+      if (options.filesContainer === undefined) {
+        options.filesContainer = this.element.find('.files');
+      } else if (!(options.filesContainer instanceof $)) {
+        options.filesContainer = $(options.filesContainer);
+      }
+    },
+
+    _initSpecialOptions: function () {
+      this._super();
+      this._initFilesContainer();
+      this._initTemplates();
+    },
+
+    _create: function () {
+      this._super();
+      this._resetFinishedDeferreds();
+      if (!$.support.fileInput) {
+        this._disableFileInputButton();
+      }
+    },
+
+    enable: function () {
+      var wasDisabled = false;
+      if (this.options.disabled) {
+        wasDisabled = true;
+      }
+      this._super();
+      if (wasDisabled) {
+        this.element.find('input, button').prop('disabled', false);
+        this._enableFileInputButton();
+      }
+    },
+
+    disable: function () {
+      if (!this.options.disabled) {
+        this.element.find('input, button').prop('disabled', true);
+        this._disableFileInputButton();
+      }
+      this._super();
+    }
+  });
+});

vendor/blueimp/jquery-file-upload/js/jquery.fileupload-validate.js

@@ -0,0 +1,119 @@
+/*
+ * jQuery File Upload Validation Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2013, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global define, require */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define(['jquery', './jquery.fileupload-process'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(require('jquery'), require('./jquery.fileupload-process'));
+  } else {
+    // Browser globals:
+    factory(window.jQuery);
+  }
+})(function ($) {
+  'use strict';
+
+  // Append to the default processQueue:
+  $.blueimp.fileupload.prototype.options.processQueue.push({
+    action: 'validate',
+    // Always trigger this action,
+    // even if the previous action was rejected:
+    always: true,
+    // Options taken from the global options map:
+    acceptFileTypes: '@',
+    maxFileSize: '@',
+    minFileSize: '@',
+    maxNumberOfFiles: '@',
+    disabled: '@disableValidation'
+  });
+
+  // The File Upload Validation plugin extends the fileupload widget
+  // with file validation functionality:
+  $.widget('blueimp.fileupload', $.blueimp.fileupload, {
+    options: {
+      /*
+            // The regular expression for allowed file types, matches
+            // against either file type or file name:
+            acceptFileTypes: /(\.|\/)(gif|jpe?g|png)$/i,
+            // The maximum allowed file size in bytes:
+            maxFileSize: 10000000, // 10 MB
+            // The minimum allowed file size in bytes:
+            minFileSize: undefined, // No minimal file size
+            // The limit of files to be uploaded:
+            maxNumberOfFiles: 10,
+            */
+
+      // Function returning the current number of files,
+      // has to be overriden for maxNumberOfFiles validation:
+      getNumberOfFiles: $.noop,
+
+      // Error and info messages:
+      messages: {
+        maxNumberOfFiles: 'Maximum number of files exceeded',
+        acceptFileTypes: 'File type not allowed',
+        maxFileSize: 'File is too large',
+        minFileSize: 'File is too small'
+      }
+    },
+
+    processActions: {
+      validate: function (data, options) {
+        if (options.disabled) {
+          return data;
+        }
+        // eslint-disable-next-line new-cap
+        var dfd = $.Deferred(),
+          settings = this.options,
+          file = data.files[data.index],
+          fileSize;
+        if (options.minFileSize || options.maxFileSize) {
+          fileSize = file.size;
+        }
+        if (
+          $.type(options.maxNumberOfFiles) === 'number' &&
+          (settings.getNumberOfFiles() || 0) + data.files.length >
+            options.maxNumberOfFiles
+        ) {
+          file.error = settings.i18n('maxNumberOfFiles');
+        } else if (
+          options.acceptFileTypes &&
+          !(
+            options.acceptFileTypes.test(file.type) ||
+            options.acceptFileTypes.test(file.name)
+          )
+        ) {
+          file.error = settings.i18n('acceptFileTypes');
+        } else if (fileSize > options.maxFileSize) {
+          file.error = settings.i18n('maxFileSize');
+        } else if (
+          $.type(fileSize) === 'number' &&
+          fileSize < options.minFileSize
+        ) {
+          file.error = settings.i18n('minFileSize');
+        } else {
+          delete file.error;
+        }
+        if (file.error || data.files.error) {
+          data.files.error = true;
+          dfd.rejectWith(this, [data]);
+        } else {
+          dfd.resolveWith(this, [data]);
+        }
+        return dfd.promise();
+      }
+    }
+  });
+});

vendor/blueimp/jquery-file-upload/js/jquery.fileupload-video.js

@@ -0,0 +1,101 @@
+/*
+ * jQuery File Upload Video Preview Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2013, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global define, require */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define(['jquery', 'load-image', './jquery.fileupload-process'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(
+      require('jquery'),
+      require('blueimp-load-image/js/load-image'),
+      require('./jquery.fileupload-process')
+    );
+  } else {
+    // Browser globals:
+    factory(window.jQuery, window.loadImage);
+  }
+})(function ($, loadImage) {
+  'use strict';
+
+  // Prepend to the default processQueue:
+  $.blueimp.fileupload.prototype.options.processQueue.unshift(
+    {
+      action: 'loadVideo',
+      // Use the action as prefix for the "@" options:
+      prefix: true,
+      fileTypes: '@',
+      maxFileSize: '@',
+      disabled: '@disableVideoPreview'
+    },
+    {
+      action: 'setVideo',
+      name: '@videoPreviewName',
+      disabled: '@disableVideoPreview'
+    }
+  );
+
+  // The File Upload Video Preview plugin extends the fileupload widget
+  // with video preview functionality:
+  $.widget('blueimp.fileupload', $.blueimp.fileupload, {
+    options: {
+      // The regular expression for the types of video files to load,
+      // matched against the file type:
+      loadVideoFileTypes: /^video\/.*$/
+    },
+
+    _videoElement: document.createElement('video'),
+
+    processActions: {
+      // Loads the video file given via data.files and data.index
+      // as video element if the browser supports playing it.
+      // Accepts the options fileTypes (regular expression)
+      // and maxFileSize (integer) to limit the files to load:
+      loadVideo: function (data, options) {
+        if (options.disabled) {
+          return data;
+        }
+        var file = data.files[data.index],
+          url,
+          video;
+        if (
+          this._videoElement.canPlayType &&
+          this._videoElement.canPlayType(file.type) &&
+          ($.type(options.maxFileSize) !== 'number' ||
+            file.size <= options.maxFileSize) &&
+          (!options.fileTypes || options.fileTypes.test(file.type))
+        ) {
+          url = loadImage.createObjectURL(file);
+          if (url) {
+            video = this._videoElement.cloneNode(false);
+            video.src = url;
+            video.controls = true;
+            data.video = video;
+            return data;
+          }
+        }
+        return data;
+      },
+
+      // Sets the video element as a property of the file object:
+      setVideo: function (data, options) {
+        if (data.video && !options.disabled) {
+          data.files[data.index][options.name || 'preview'] = data.video;
+        }
+        return data;
+      }
+    }
+  });
+});

vendor/blueimp/jquery-file-upload/js/jquery.iframe-transport.js

@@ -0,0 +1,227 @@
+/*
+ * jQuery Iframe Transport Plugin
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global define, require */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // Register as an anonymous AMD module:
+    define(['jquery'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS:
+    factory(require('jquery'));
+  } else {
+    // Browser globals:
+    factory(window.jQuery);
+  }
+})(function ($) {
+  'use strict';
+
+  // Helper variable to create unique names for the transport iframes:
+  var counter = 0,
+    jsonAPI = $,
+    jsonParse = 'parseJSON';
+
+  if ('JSON' in window && 'parse' in JSON) {
+    jsonAPI = JSON;
+    jsonParse = 'parse';
+  }
+
+  // The iframe transport accepts four additional options:
+  // options.fileInput: a jQuery collection of file input fields
+  // options.paramName: the parameter name for the file form data,
+  //  overrides the name property of the file input field(s),
+  //  can be a string or an array of strings.
+  // options.formData: an array of objects with name and value properties,
+  //  equivalent to the return data of .serializeArray(), e.g.:
+  //  [{name: 'a', value: 1}, {name: 'b', value: 2}]
+  // options.initialIframeSrc: the URL of the initial iframe src,
+  //  by default set to "javascript:false;"
+  $.ajaxTransport('iframe', function (options) {
+    if (options.async) {
+      // javascript:false as initial iframe src
+      // prevents warning popups on HTTPS in IE6:
+      // eslint-disable-next-line no-script-url
+      var initialIframeSrc = options.initialIframeSrc || 'javascript:false;',
+        form,
+        iframe,
+        addParamChar;
+      return {
+        send: function (_, completeCallback) {
+          form = $('<form style="display:none;"></form>');
+          form.attr('accept-charset', options.formAcceptCharset);
+          addParamChar = /\?/.test(options.url) ? '&' : '?';
+          // XDomainRequest only supports GET and POST:
+          if (options.type === 'DELETE') {
+            options.url = options.url + addParamChar + '_method=DELETE';
+            options.type = 'POST';
+          } else if (options.type === 'PUT') {
+            options.url = options.url + addParamChar + '_method=PUT';
+            options.type = 'POST';
+          } else if (options.type === 'PATCH') {
+            options.url = options.url + addParamChar + '_method=PATCH';
+            options.type = 'POST';
+          }
+          // IE versions below IE8 cannot set the name property of
+          // elements that have already been added to the DOM,
+          // so we set the name along with the iframe HTML markup:
+          counter += 1;
+          iframe = $(
+            '<iframe src="' +
+              initialIframeSrc +
+              '" name="iframe-transport-' +
+              counter +
+              '"></iframe>'
+          ).on('load', function () {
+            var fileInputClones,
+              paramNames = $.isArray(options.paramName)
+                ? options.paramName
+                : [options.paramName];
+            iframe.off('load').on('load', function () {
+              var response;
+              // Wrap in a try/catch block to catch exceptions thrown
+              // when trying to access cross-domain iframe contents:
+              try {
+                response = iframe.contents();
+                // Google Chrome and Firefox do not throw an
+                // exception when calling iframe.contents() on
+                // cross-domain requests, so we unify the response:
+                if (!response.length || !response[0].firstChild) {
+                  throw new Error();
+                }
+              } catch (e) {
+                response = undefined;
+              }
+              // The complete callback returns the
+              // iframe content document as response object:
+              completeCallback(200, 'success', { iframe: response });
+              // Fix for IE endless progress bar activity bug
+              // (happens on form submits to iframe targets):
+              $('<iframe src="' + initialIframeSrc + '"></iframe>').appendTo(
+                form
+              );
+              window.setTimeout(function () {
+                // Removing the form in a setTimeout call
+                // allows Chrome's developer tools to display
+                // the response result
+                form.remove();
+              }, 0);
+            });
+            form
+              .prop('target', iframe.prop('name'))
+              .prop('action', options.url)
+              .prop('method', options.type);
+            if (options.formData) {
+              $.each(options.formData, function (index, field) {
+                $('<input type="hidden"/>')
+                  .prop('name', field.name)
+                  .val(field.value)
+                  .appendTo(form);
+              });
+            }
+            if (
+              options.fileInput &&
+              options.fileInput.length &&
+              options.type === 'POST'
+            ) {
+              fileInputClones = options.fileInput.clone();
+              // Insert a clone for each file input field:
+              options.fileInput.after(function (index) {
+                return fileInputClones[index];
+              });
+              if (options.paramName) {
+                options.fileInput.each(function (index) {
+                  $(this).prop('name', paramNames[index] || options.paramName);
+                });
+              }
+              // Appending the file input fields to the hidden form
+              // removes them from their original location:
+              form
+                .append(options.fileInput)
+                .prop('enctype', 'multipart/form-data')
+                // enctype must be set as encoding for IE:
+                .prop('encoding', 'multipart/form-data');
+              // Remove the HTML5 form attribute from the input(s):
+              options.fileInput.removeAttr('form');
+            }
+            window.setTimeout(function () {
+              // Submitting the form in a setTimeout call fixes an issue with
+              // Safari 13 not triggering the iframe load event after resetting
+              // the load event handler, see also:
+              // https://github.com/blueimp/jQuery-File-Upload/issues/3633
+              form.submit();
+              // Insert the file input fields at their original location
+              // by replacing the clones with the originals:
+              if (fileInputClones && fileInputClones.length) {
+                options.fileInput.each(function (index, input) {
+                  var clone = $(fileInputClones[index]);
+                  // Restore the original name and form properties:
+                  $(input)
+                    .prop('name', clone.prop('name'))
+                    .attr('form', clone.attr('form'));
+                  clone.replaceWith(input);
+                });
+              }
+            }, 0);
+          });
+          form.append(iframe).appendTo(document.body);
+        },
+        abort: function () {
+          if (iframe) {
+            // javascript:false as iframe src aborts the request
+            // and prevents warning popups on HTTPS in IE6.
+            iframe.off('load').prop('src', initialIframeSrc);
+          }
+          if (form) {
+            form.remove();
+          }
+        }
+      };
+    }
+  });
+
+  // The iframe transport returns the iframe content document as response.
+  // The following adds converters from iframe to text, json, html, xml
+  // and script.
+  // Please note that the Content-Type for JSON responses has to be text/plain
+  // or text/html, if the browser doesn't include application/json in the
+  // Accept header, else IE will show a download dialog.
+  // The Content-Type for XML responses on the other hand has to be always
+  // application/xml or text/xml, so IE properly parses the XML response.
+  // See also
+  // https://github.com/blueimp/jQuery-File-Upload/wiki/Setup#content-type-negotiation
+  $.ajaxSetup({
+    converters: {
+      'iframe text': function (iframe) {
+        return iframe && $(iframe[0].body).text();
+      },
+      'iframe json': function (iframe) {
+        return iframe && jsonAPI[jsonParse]($(iframe[0].body).text());
+      },
+      'iframe html': function (iframe) {
+        return iframe && $(iframe[0].body).html();
+      },
+      'iframe xml': function (iframe) {
+        var xmlDoc = iframe && iframe[0];
+        return xmlDoc && $.isXMLDoc(xmlDoc)
+          ? xmlDoc
+          : $.parseXML(
+              (xmlDoc.XMLDocument && xmlDoc.XMLDocument.xml) ||
+                $(xmlDoc.body).html()
+            );
+      },
+      'iframe script': function (iframe) {
+        return iframe && $.globalEval($(iframe[0].body).text());
+      }
+    }
+  });
+});

vendor/blueimp/jquery-file-upload/js/vendor/jquery.ui.widget.js

@@ -0,0 +1,808 @@
+/*! jQuery UI - v1.12.1+0b7246b6eeadfa9e2696e22f3230f6452f8129dc - 2020-02-20
+ * http://jqueryui.com
+ * Includes: widget.js
+ * Copyright jQuery Foundation and other contributors; Licensed MIT */
+
+/* global define, require */
+/* eslint-disable no-param-reassign, new-cap, jsdoc/require-jsdoc */
+
+(function (factory) {
+  'use strict';
+  if (typeof define === 'function' && define.amd) {
+    // AMD. Register as an anonymous module.
+    define(['jquery'], factory);
+  } else if (typeof exports === 'object') {
+    // Node/CommonJS
+    factory(require('jquery'));
+  } else {
+    // Browser globals
+    factory(window.jQuery);
+  }
+})(function ($) {
+  ('use strict');
+
+  $.ui = $.ui || {};
+
+  $.ui.version = '1.12.1';
+
+  /*!
+   * jQuery UI Widget 1.12.1
+   * http://jqueryui.com
+   *
+   * Copyright jQuery Foundation and other contributors
+   * Released under the MIT license.
+   * http://jquery.org/license
+   */
+
+  //>>label: Widget
+  //>>group: Core
+  //>>description: Provides a factory for creating stateful widgets with a common API.
+  //>>docs: http://api.jqueryui.com/jQuery.widget/
+  //>>demos: http://jqueryui.com/widget/
+
+  // Support: jQuery 1.9.x or older
+  // $.expr[ ":" ] is deprecated.
+  if (!$.expr.pseudos) {
+    $.expr.pseudos = $.expr[':'];
+  }
+
+  // Support: jQuery 1.11.x or older
+  // $.unique has been renamed to $.uniqueSort
+  if (!$.uniqueSort) {
+    $.uniqueSort = $.unique;
+  }
+
+  var widgetUuid = 0;
+  var widgetHasOwnProperty = Array.prototype.hasOwnProperty;
+  var widgetSlice = Array.prototype.slice;
+
+  $.cleanData = (function (orig) {
+    return function (elems) {
+      var events, elem, i;
+      // eslint-disable-next-line eqeqeq
+      for (i = 0; (elem = elems[i]) != null; i++) {
+        // Only trigger remove when necessary to save time
+        events = $._data(elem, 'events');
+        if (events && events.remove) {
+          $(elem).triggerHandler('remove');
+        }
+      }
+      orig(elems);
+    };
+  })($.cleanData);
+
+  $.widget = function (name, base, prototype) {
+    var existingConstructor, constructor, basePrototype;
+
+    // ProxiedPrototype allows the provided prototype to remain unmodified
+    // so that it can be used as a mixin for multiple widgets (#8876)
+    var proxiedPrototype = {};
+
+    var namespace = name.split('.')[0];
+    name = name.split('.')[1];
+    var fullName = namespace + '-' + name;
+
+    if (!prototype) {
+      prototype = base;
+      base = $.Widget;
+    }
+
+    if ($.isArray(prototype)) {
+      prototype = $.extend.apply(null, [{}].concat(prototype));
+    }
+
+    // Create selector for plugin
+    $.expr.pseudos[fullName.toLowerCase()] = function (elem) {
+      return !!$.data(elem, fullName);
+    };
+
+    $[namespace] = $[namespace] || {};
+    existingConstructor = $[namespace][name];
+    constructor = $[namespace][name] = function (options, element) {
+      // Allow instantiation without "new" keyword
+      if (!this._createWidget) {
+        return new constructor(options, element);
+      }
+
+      // Allow instantiation without initializing for simple inheritance
+      // must use "new" keyword (the code above always passes args)
+      if (arguments.length) {
+        this._createWidget(options, element);
+      }
+    };
+
+    // Extend with the existing constructor to carry over any static properties
+    $.extend(constructor, existingConstructor, {
+      version: prototype.version,
+
+      // Copy the object used to create the prototype in case we need to
+      // redefine the widget later
+      _proto: $.extend({}, prototype),
+
+      // Track widgets that inherit from this widget in case this widget is
+      // redefined after a widget inherits from it
+      _childConstructors: []
+    });
+
+    basePrototype = new base();
+
+    // We need to make the options hash a property directly on the new instance
+    // otherwise we'll modify the options hash on the prototype that we're
+    // inheriting from
+    basePrototype.options = $.widget.extend({}, basePrototype.options);
+    $.each(prototype, function (prop, value) {
+      if (!$.isFunction(value)) {
+        proxiedPrototype[prop] = value;
+        return;
+      }
+      proxiedPrototype[prop] = (function () {
+        function _super() {
+          return base.prototype[prop].apply(this, arguments);
+        }
+
+        function _superApply(args) {
+          return base.prototype[prop].apply(this, args);
+        }
+
+        return function () {
+          var __super = this._super;
+          var __superApply = this._superApply;
+          var returnValue;
+
+          this._super = _super;
+          this._superApply = _superApply;
+
+          returnValue = value.apply(this, arguments);
+
+          this._super = __super;
+          this._superApply = __superApply;
+
+          return returnValue;
+        };
+      })();
+    });
+    constructor.prototype = $.widget.extend(
+      basePrototype,
+      {
+        // TODO: remove support for widgetEventPrefix
+        // always use the name + a colon as the prefix, e.g., draggable:start
+        // don't prefix for widgets that aren't DOM-based
+        widgetEventPrefix: existingConstructor
+          ? basePrototype.widgetEventPrefix || name
+          : name
+      },
+      proxiedPrototype,
+      {
+        constructor: constructor,
+        namespace: namespace,
+        widgetName: name,
+        widgetFullName: fullName
+      }
+    );
+
+    // If this widget is being redefined then we need to find all widgets that
+    // are inheriting from it and redefine all of them so that they inherit from
+    // the new version of this widget. We're essentially trying to replace one
+    // level in the prototype chain.
+    if (existingConstructor) {
+      $.each(existingConstructor._childConstructors, function (i, child) {
+        var childPrototype = child.prototype;
+
+        // Redefine the child widget using the same prototype that was
+        // originally used, but inherit from the new version of the base
+        $.widget(
+          childPrototype.namespace + '.' + childPrototype.widgetName,
+          constructor,
+          child._proto
+        );
+      });
+
+      // Remove the list of existing child constructors from the old constructor
+      // so the old child constructors can be garbage collected
+      delete existingConstructor._childConstructors;
+    } else {
+      base._childConstructors.push(constructor);
+    }
+
+    $.widget.bridge(name, constructor);
+
+    return constructor;
+  };
+
+  $.widget.extend = function (target) {
+    var input = widgetSlice.call(arguments, 1);
+    var inputIndex = 0;
+    var inputLength = input.length;
+    var key;
+    var value;
+
+    for (; inputIndex < inputLength; inputIndex++) {
+      for (key in input[inputIndex]) {
+        value = input[inputIndex][key];
+        if (
+          widgetHasOwnProperty.call(input[inputIndex], key) &&
+          value !== undefined
+        ) {
+          // Clone objects
+          if ($.isPlainObject(value)) {
+            target[key] = $.isPlainObject(target[key])
+              ? $.widget.extend({}, target[key], value)
+              : // Don't extend strings, arrays, etc. with objects
+                $.widget.extend({}, value);
+
+            // Copy everything else by reference
+          } else {
+            target[key] = value;
+          }
+        }
+      }
+    }
+    return target;
+  };
+
+  $.widget.bridge = function (name, object) {
+    var fullName = object.prototype.widgetFullName || name;
+    $.fn[name] = function (options) {
+      var isMethodCall = typeof options === 'string';
+      var args = widgetSlice.call(arguments, 1);
+      var returnValue = this;
+
+      if (isMethodCall) {
+        // If this is an empty collection, we need to have the instance method
+        // return undefined instead of the jQuery instance
+        if (!this.length && options === 'instance') {
+          returnValue = undefined;
+        } else {
+          this.each(function () {
+            var methodValue;
+            var instance = $.data(this, fullName);
+
+            if (options === 'instance') {
+              returnValue = instance;
+              return false;
+            }
+
+            if (!instance) {
+              return $.error(
+                'cannot call methods on ' +
+                  name +
+                  ' prior to initialization; ' +
+                  "attempted to call method '" +
+                  options +
+                  "'"
+              );
+            }
+
+            if (!$.isFunction(instance[options]) || options.charAt(0) === '_') {
+              return $.error(
+                "no such method '" +
+                  options +
+                  "' for " +
+                  name +
+                  ' widget instance'
+              );
+            }
+
+            methodValue = instance[options].apply(instance, args);
+
+            if (methodValue !== instance && methodValue !== undefined) {
+              returnValue =
+                methodValue && methodValue.jquery
+                  ? returnValue.pushStack(methodValue.get())
+                  : methodValue;
+              return false;
+            }
+          });
+        }
+      } else {
+        // Allow multiple hashes to be passed on init
+        if (args.length) {
+          options = $.widget.extend.apply(null, [options].concat(args));
+        }
+
+        this.each(function () {
+          var instance = $.data(this, fullName);
+          if (instance) {
+            instance.option(options || {});
+            if (instance._init) {
+              instance._init();
+            }
+          } else {
+            $.data(this, fullName, new object(options, this));
+          }
+        });
+      }
+
+      return returnValue;
+    };
+  };
+
+  $.Widget = function (/* options, element */) {};
+  $.Widget._childConstructors = [];
+
+  $.Widget.prototype = {
+    widgetName: 'widget',
+    widgetEventPrefix: '',
+    defaultElement: '<div>',
+
+    options: {
+      classes: {},
+      disabled: false,
+
+      // Callbacks
+      create: null
+    },
+
+    _createWidget: function (options, element) {
+      element = $(element || this.defaultElement || this)[0];
+      this.element = $(element);
+      this.uuid = widgetUuid++;
+      this.eventNamespace = '.' + this.widgetName + this.uuid;
+
+      this.bindings = $();
+      this.hoverable = $();
+      this.focusable = $();
+      this.classesElementLookup = {};
+
+      if (element !== this) {
+        $.data(element, this.widgetFullName, this);
+        this._on(true, this.element, {
+          remove: function (event) {
+            if (event.target === element) {
+              this.destroy();
+            }
+          }
+        });
+        this.document = $(
+          element.style
+            ? // Element within the document
+              element.ownerDocument
+            : // Element is window or document
+              element.document || element
+        );
+        this.window = $(
+          this.document[0].defaultView || this.document[0].parentWindow
+        );
+      }
+
+      this.options = $.widget.extend(
+        {},
+        this.options,
+        this._getCreateOptions(),
+        options
+      );
+
+      this._create();
+
+      if (this.options.disabled) {
+        this._setOptionDisabled(this.options.disabled);
+      }
+
+      this._trigger('create', null, this._getCreateEventData());
+      this._init();
+    },
+
+    _getCreateOptions: function () {
+      return {};
+    },
+
+    _getCreateEventData: $.noop,
+
+    _create: $.noop,
+
+    _init: $.noop,
+
+    destroy: function () {
+      var that = this;
+
+      this._destroy();
+      $.each(this.classesElementLookup, function (key, value) {
+        that._removeClass(value, key);
+      });
+
+      // We can probably remove the unbind calls in 2.0
+      // all event bindings should go through this._on()
+      this.element.off(this.eventNamespace).removeData(this.widgetFullName);
+      this.widget().off(this.eventNamespace).removeAttr('aria-disabled');
+
+      // Clean up events and states
+      this.bindings.off(this.eventNamespace);
+    },
+
+    _destroy: $.noop,
+
+    widget: function () {
+      return this.element;
+    },
+
+    option: function (key, value) {
+      var options = key;
+      var parts;
+      var curOption;
+      var i;
+
+      if (arguments.length === 0) {
+        // Don't return a reference to the internal hash
+        return $.widget.extend({}, this.options);
+      }
+
+      if (typeof key === 'string') {
+        // Handle nested keys, e.g., "foo.bar" => { foo: { bar: ___ } }
+        options = {};
+        parts = key.split('.');
+        key = parts.shift();
+        if (parts.length) {
+          curOption = options[key] = $.widget.extend({}, this.options[key]);
+          for (i = 0; i < parts.length - 1; i++) {
+            curOption[parts[i]] = curOption[parts[i]] || {};
+            curOption = curOption[parts[i]];
+          }
+          key = parts.pop();
+          if (arguments.length === 1) {
+            return curOption[key] === undefined ? null : curOption[key];
+          }
+          curOption[key] = value;
+        } else {
+          if (arguments.length === 1) {
+            return this.options[key] === undefined ? null : this.options[key];
+          }
+          options[key] = value;
+        }
+      }
+
+      this._setOptions(options);
+
+      return this;
+    },
+
+    _setOptions: function (options) {
+      var key;
+
+      for (key in options) {
+        this._setOption(key, options[key]);
+      }
+
+      return this;
+    },
+
+    _setOption: function (key, value) {
+      if (key === 'classes') {
+        this._setOptionClasses(value);
+      }
+
+      this.options[key] = value;
+
+      if (key === 'disabled') {
+        this._setOptionDisabled(value);
+      }
+
+      return this;
+    },
+
+    _setOptionClasses: function (value) {
+      var classKey, elements, currentElements;
+
+      for (classKey in value) {
+        currentElements = this.classesElementLookup[classKey];
+        if (
+          value[classKey] === this.options.classes[classKey] ||
+          !currentElements ||
+          !currentElements.length
+        ) {
+          continue;
+        }
+
+        // We are doing this to create a new jQuery object because the _removeClass() call
+        // on the next line is going to destroy the reference to the current elements being
+        // tracked. We need to save a copy of this collection so that we can add the new classes
+        // below.
+        elements = $(currentElements.get());
+        this._removeClass(currentElements, classKey);
+
+        // We don't use _addClass() here, because that uses this.options.classes
+        // for generating the string of classes. We want to use the value passed in from
+        // _setOption(), this is the new value of the classes option which was passed to
+        // _setOption(). We pass this value directly to _classes().
+        elements.addClass(
+          this._classes({
+            element: elements,
+            keys: classKey,
+            classes: value,
+            add: true
+          })
+        );
+      }
+    },
+
+    _setOptionDisabled: function (value) {
+      this._toggleClass(
+        this.widget(),
+        this.widgetFullName + '-disabled',
+        null,
+        !!value
+      );
+
+      // If the widget is becoming disabled, then nothing is interactive
+      if (value) {
+        this._removeClass(this.hoverable, null, 'ui-state-hover');
+        this._removeClass(this.focusable, null, 'ui-state-focus');
+      }
+    },
+
+    enable: function () {
+      return this._setOptions({ disabled: false });
+    },
+
+    disable: function () {
+      return this._setOptions({ disabled: true });
+    },
+
+    _classes: function (options) {
+      var full = [];
+      var that = this;
+
+      options = $.extend(
+        {
+          element: this.element,
+          classes: this.options.classes || {}
+        },
+        options
+      );
+
+      function bindRemoveEvent() {
+        options.element.each(function (_, element) {
+          var isTracked = $.map(that.classesElementLookup, function (elements) {
+            return elements;
+          }).some(function (elements) {
+            return elements.is(element);
+          });
+
+          if (!isTracked) {
+            that._on($(element), {
+              remove: '_untrackClassesElement'
+            });
+          }
+        });
+      }
+
+      function processClassString(classes, checkOption) {
+        var current, i;
+        for (i = 0; i < classes.length; i++) {
+          current = that.classesElementLookup[classes[i]] || $();
+          if (options.add) {
+            bindRemoveEvent();
+            current = $(
+              $.uniqueSort(current.get().concat(options.element.get()))
+            );
+          } else {
+            current = $(current.not(options.element).get());
+          }
+          that.classesElementLookup[classes[i]] = current;
+          full.push(classes[i]);
+          if (checkOption && options.classes[classes[i]]) {
+            full.push(options.classes[classes[i]]);
+          }
+        }
+      }
+
+      if (options.keys) {
+        processClassString(options.keys.match(/\S+/g) || [], true);
+      }
+      if (options.extra) {
+        processClassString(options.extra.match(/\S+/g) || []);
+      }
+
+      return full.join(' ');
+    },
+
+    _untrackClassesElement: function (event) {
+      var that = this;
+      $.each(that.classesElementLookup, function (key, value) {
+        if ($.inArray(event.target, value) !== -1) {
+          that.classesElementLookup[key] = $(value.not(event.target).get());
+        }
+      });
+
+      this._off($(event.target));
+    },
+
+    _removeClass: function (element, keys, extra) {
+      return this._toggleClass(element, keys, extra, false);
+    },
+
+    _addClass: function (element, keys, extra) {
+      return this._toggleClass(element, keys, extra, true);
+    },
+
+    _toggleClass: function (element, keys, extra, add) {
+      add = typeof add === 'boolean' ? add : extra;
+      var shift = typeof element === 'string' || element === null,
+        options = {
+          extra: shift ? keys : extra,
+          keys: shift ? element : keys,
+          element: shift ? this.element : element,
+          add: add
+        };
+      options.element.toggleClass(this._classes(options), add);
+      return this;
+    },
+
+    _on: function (suppressDisabledCheck, element, handlers) {
+      var delegateElement;
+      var instance = this;
+
+      // No suppressDisabledCheck flag, shuffle arguments
+      if (typeof suppressDisabledCheck !== 'boolean') {
+        handlers = element;
+        element = suppressDisabledCheck;
+        suppressDisabledCheck = false;
+      }
+
+      // No element argument, shuffle and use this.element
+      if (!handlers) {
+        handlers = element;
+        element = this.element;
+        delegateElement = this.widget();
+      } else {
+        element = delegateElement = $(element);
+        this.bindings = this.bindings.add(element);
+      }
+
+      $.each(handlers, function (event, handler) {
+        function handlerProxy() {
+          // Allow widgets to customize the disabled handling
+          // - disabled as an array instead of boolean
+          // - disabled class as method for disabling individual parts
+          if (
+            !suppressDisabledCheck &&
+            (instance.options.disabled === true ||
+              $(this).hasClass('ui-state-disabled'))
+          ) {
+            return;
+          }
+          return (typeof handler === 'string'
+            ? instance[handler]
+            : handler
+          ).apply(instance, arguments);
+        }
+
+        // Copy the guid so direct unbinding works
+        if (typeof handler !== 'string') {
+          handlerProxy.guid = handler.guid =
+            handler.guid || handlerProxy.guid || $.guid++;
+        }
+
+        var match = event.match(/^([\w:-]*)\s*(.*)$/);
+        var eventName = match[1] + instance.eventNamespace;
+        var selector = match[2];
+
+        if (selector) {
+          delegateElement.on(eventName, selector, handlerProxy);
+        } else {
+          element.on(eventName, handlerProxy);
+        }
+      });
+    },
+
+    _off: function (element, eventName) {
+      eventName =
+        (eventName || '').split(' ').join(this.eventNamespace + ' ') +
+        this.eventNamespace;
+      element.off(eventName);
+
+      // Clear the stack to avoid memory leaks (#10056)
+      this.bindings = $(this.bindings.not(element).get());
+      this.focusable = $(this.focusable.not(element).get());
+      this.hoverable = $(this.hoverable.not(element).get());
+    },
+
+    _delay: function (handler, delay) {
+      var instance = this;
+      function handlerProxy() {
+        return (typeof handler === 'string'
+          ? instance[handler]
+          : handler
+        ).apply(instance, arguments);
+      }
+      return setTimeout(handlerProxy, delay || 0);
+    },
+
+    _hoverable: function (element) {
+      this.hoverable = this.hoverable.add(element);
+      this._on(element, {
+        mouseenter: function (event) {
+          this._addClass($(event.currentTarget), null, 'ui-state-hover');
+        },
+        mouseleave: function (event) {
+          this._removeClass($(event.currentTarget), null, 'ui-state-hover');
+        }
+      });
+    },
+
+    _focusable: function (element) {
+      this.focusable = this.focusable.add(element);
+      this._on(element, {
+        focusin: function (event) {
+          this._addClass($(event.currentTarget), null, 'ui-state-focus');
+        },
+        focusout: function (event) {
+          this._removeClass($(event.currentTarget), null, 'ui-state-focus');
+        }
+      });
+    },
+
+    _trigger: function (type, event, data) {
+      var prop, orig;
+      var callback = this.options[type];
+
+      data = data || {};
+      event = $.Event(event);
+      event.type = (type === this.widgetEventPrefix
+        ? type
+        : this.widgetEventPrefix + type
+      ).toLowerCase();
+
+      // The original event may come from any element
+      // so we need to reset the target on the new event
+      event.target = this.element[0];
+
+      // Copy original event properties over to the new event
+      orig = event.originalEvent;
+      if (orig) {
+        for (prop in orig) {
+          if (!(prop in event)) {
+            event[prop] = orig[prop];
+          }
+        }
+      }
+
+      this.element.trigger(event, data);
+      return !(
+        ($.isFunction(callback) &&
+          callback.apply(this.element[0], [event].concat(data)) === false) ||
+        event.isDefaultPrevented()
+      );
+    }
+  };
+
+  $.each({ show: 'fadeIn', hide: 'fadeOut' }, function (method, defaultEffect) {
+    $.Widget.prototype['_' + method] = function (element, options, callback) {
+      if (typeof options === 'string') {
+        options = { effect: options };
+      }
+
+      var hasOptions;
+      var effectName = !options
+        ? method
+        : options === true || typeof options === 'number'
+        ? defaultEffect
+        : options.effect || defaultEffect;
+
+      options = options || {};
+      if (typeof options === 'number') {
+        options = { duration: options };
+      }
+
+      hasOptions = !$.isEmptyObject(options);
+      options.complete = callback;
+
+      if (options.delay) {
+        element.delay(options.delay);
+      }
+
+      if (hasOptions && $.effects && $.effects.effect[effectName]) {
+        element[method](options);
+      } else if (effectName !== method && element[effectName]) {
+        element[effectName](options.duration, options.easing, callback);
+      } else {
+        element.queue(function (next) {
+          $(this)[method]();
+          if (callback) {
+            callback.call(element[0]);
+          }
+          next();
+        });
+      }
+    };
+  });
+});

vendor/blueimp/jquery-file-upload/package.json

@@ -0,0 +1,116 @@
+{
+  "name": "blueimp-file-upload",
+  "version": "10.29.0",
+  "title": "jQuery File Upload",
+  "description": "File Upload widget with multiple file selection, drag&drop support, progress bar, validation and preview images, audio and video for jQuery. Supports cross-domain, chunked and resumable file uploads. Works with any server-side platform (Google App Engine, PHP, Python, Ruby on Rails, Java, etc.) that supports standard HTML form file uploads.",
+  "keywords": [
+    "jquery",
+    "file",
+    "upload",
+    "widget",
+    "multiple",
+    "selection",
+    "drag",
+    "drop",
+    "progress",
+    "preview",
+    "cross-domain",
+    "cross-site",
+    "chunk",
+    "resume",
+    "gae",
+    "go",
+    "python",
+    "php",
+    "bootstrap"
+  ],
+  "homepage": "https://github.com/blueimp/jQuery-File-Upload",
+  "author": {
+    "name": "Sebastian Tschan",
+    "url": "https://blueimp.net"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/blueimp/jQuery-File-Upload.git"
+  },
+  "license": "MIT",
+  "peerDependencies": {
+    "jquery": ">=1.7"
+  },
+  "optionalDependencies": {
+    "blueimp-canvas-to-blob": "3",
+    "blueimp-load-image": "5",
+    "blueimp-tmpl": "3"
+  },
+  "devDependencies": {
+    "eslint": "7",
+    "eslint-config-blueimp": "2",
+    "eslint-config-prettier": "6",
+    "eslint-plugin-jsdoc": "25",
+    "eslint-plugin-prettier": "3",
+    "prettier": "2",
+    "stylelint": "13",
+    "stylelint-config-prettier": "8",
+    "stylelint-config-recommended": "3"
+  },
+  "stylelint": {
+    "extends": [
+      "stylelint-config-recommended",
+      "stylelint-config-prettier"
+    ],
+    "ignoreFiles": [
+      "css/*.min.css",
+      "css/vendor/*",
+      "test/vendor/*"
+    ]
+  },
+  "eslintConfig": {
+    "extends": [
+      "blueimp",
+      "plugin:jsdoc/recommended",
+      "plugin:prettier/recommended"
+    ],
+    "env": {
+      "browser": true
+    }
+  },
+  "eslintIgnore": [
+    "js/*.min.js",
+    "test/vendor"
+  ],
+  "prettier": {
+    "arrowParens": "avoid",
+    "proseWrap": "always",
+    "singleQuote": true,
+    "trailingComma": "none"
+  },
+  "scripts": {
+    "lint": "stylelint '**/*.css' && eslint .",
+    "unit": "docker-compose run --rm mocha",
+    "wdio": "docker-compose run --rm wdio",
+    "test": "npm run lint && npm run unit && npm run wdio && npm run wdio -- conf/firefox.js",
+    "posttest": "docker-compose down -v",
+    "preversion": "npm test",
+    "postversion": "git push --tags origin master && npm publish"
+  },
+  "files": [
+    "css/jquery.fileupload-noscript.css",
+    "css/jquery.fileupload-ui-noscript.css",
+    "css/jquery.fileupload-ui.css",
+    "css/jquery.fileupload.css",
+    "img/loading.gif",
+    "img/progressbar.gif",
+    "js/cors/jquery.postmessage-transport.js",
+    "js/cors/jquery.xdr-transport.js",
+    "js/vendor/jquery.ui.widget.js",
+    "js/jquery.fileupload-audio.js",
+    "js/jquery.fileupload-image.js",
+    "js/jquery.fileupload-process.js",
+    "js/jquery.fileupload-ui.js",
+    "js/jquery.fileupload-validate.js",
+    "js/jquery.fileupload-video.js",
+    "js/jquery.fileupload.js",
+    "js/jquery.iframe-transport.js"
+  ],
+  "main": "js/jquery.fileupload.js"
+}

vendor/blueimp/jquery-file-upload/server/gae-go/app.yaml

@@ -0,0 +1,10 @@
+runtime: go
+api_version: go1
+
+handlers:
+- url: /(favicon\.ico|robots\.txt)
+  static_files: static/\1
+  upload: static/(.*)
+  expiration: '1d'
+- url: /.*
+  script: _go_app

vendor/blueimp/jquery-file-upload/server/gae-go/main.go

@@ -0,0 +1,361 @@
+/*
+ * jQuery File Upload Plugin GAE Go Example
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+package app
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"github.com/disintegration/gift"
+	"golang.org/x/net/context"
+	"google.golang.org/appengine"
+	"google.golang.org/appengine/memcache"
+	"hash/crc32"
+	"image"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"log"
+	"mime/multipart"
+	"net/http"
+	"net/url"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+const (
+	WEBSITE       = "https://blueimp.github.io/jQuery-File-Upload/"
+	MIN_FILE_SIZE = 1 // bytes
+	// Max file size is memcache limit (1MB) minus key size minus overhead:
+	MAX_FILE_SIZE     = 999000 // bytes
+	IMAGE_TYPES       = "image/(gif|p?jpeg|(x-)?png)"
+	ACCEPT_FILE_TYPES = IMAGE_TYPES
+	THUMB_MAX_WIDTH   = 80
+	THUMB_MAX_HEIGHT  = 80
+	EXPIRATION_TIME   = 300 // seconds
+	// If empty, only allow redirects to the referer protocol+host.
+	// Set to a regexp string for custom pattern matching:
+	REDIRECT_ALLOW_TARGET = ""
+)
+
+var (
+	imageTypes      = regexp.MustCompile(IMAGE_TYPES)
+	acceptFileTypes = regexp.MustCompile(ACCEPT_FILE_TYPES)
+	thumbSuffix     = "." + fmt.Sprint(THUMB_MAX_WIDTH) + "x" +
+		fmt.Sprint(THUMB_MAX_HEIGHT)
+)
+
+func escape(s string) string {
+	return strings.Replace(url.QueryEscape(s), "+", "%20", -1)
+}
+
+func extractKey(r *http.Request) string {
+	// Use RequestURI instead of r.URL.Path, as we need the encoded form:
+	path := strings.Split(r.RequestURI, "?")[0]
+	// Also adjust double encoded slashes:
+	return strings.Replace(path[1:], "%252F", "%2F", -1)
+}
+
+func check(err error) {
+	if err != nil {
+		panic(err)
+	}
+}
+
+type FileInfo struct {
+	Key          string `json:"-"`
+	ThumbnailKey string `json:"-"`
+	Url          string `json:"url,omitempty"`
+	ThumbnailUrl string `json:"thumbnailUrl,omitempty"`
+	Name         string `json:"name"`
+	Type         string `json:"type"`
+	Size         int64  `json:"size"`
+	Error        string `json:"error,omitempty"`
+	DeleteUrl    string `json:"deleteUrl,omitempty"`
+	DeleteType   string `json:"deleteType,omitempty"`
+}
+
+func (fi *FileInfo) ValidateType() (valid bool) {
+	if acceptFileTypes.MatchString(fi.Type) {
+		return true
+	}
+	fi.Error = "Filetype not allowed"
+	return false
+}
+
+func (fi *FileInfo) ValidateSize() (valid bool) {
+	if fi.Size < MIN_FILE_SIZE {
+		fi.Error = "File is too small"
+	} else if fi.Size > MAX_FILE_SIZE {
+		fi.Error = "File is too big"
+	} else {
+		return true
+	}
+	return false
+}
+
+func (fi *FileInfo) CreateUrls(r *http.Request, c context.Context) {
+	u := &url.URL{
+		Scheme: r.URL.Scheme,
+		Host:   appengine.DefaultVersionHostname(c),
+		Path:   "/",
+	}
+	uString := u.String()
+	fi.Url = uString + fi.Key
+	fi.DeleteUrl = fi.Url
+	fi.DeleteType = "DELETE"
+	if fi.ThumbnailKey != "" {
+		fi.ThumbnailUrl = uString + fi.ThumbnailKey
+	}
+}
+
+func (fi *FileInfo) SetKey(checksum uint32) {
+	fi.Key = escape(string(fi.Type)) + "/" +
+		escape(fmt.Sprint(checksum)) + "/" +
+		escape(string(fi.Name))
+}
+
+func (fi *FileInfo) createThumb(buffer *bytes.Buffer, c context.Context) {
+	if imageTypes.MatchString(fi.Type) {
+		src, _, err := image.Decode(bytes.NewReader(buffer.Bytes()))
+		check(err)
+		filter := gift.New(gift.ResizeToFit(
+			THUMB_MAX_WIDTH,
+			THUMB_MAX_HEIGHT,
+			gift.LanczosResampling,
+		))
+		dst := image.NewNRGBA(filter.Bounds(src.Bounds()))
+		filter.Draw(dst, src)
+		buffer.Reset()
+		bWriter := bufio.NewWriter(buffer)
+		switch fi.Type {
+		case "image/jpeg", "image/pjpeg":
+			err = jpeg.Encode(bWriter, dst, nil)
+		case "image/gif":
+			err = gif.Encode(bWriter, dst, nil)
+		default:
+			err = png.Encode(bWriter, dst)
+		}
+		check(err)
+		bWriter.Flush()
+		thumbnailKey := fi.Key + thumbSuffix + filepath.Ext(fi.Name)
+		item := &memcache.Item{
+			Key:   thumbnailKey,
+			Value: buffer.Bytes(),
+		}
+		err = memcache.Set(c, item)
+		check(err)
+		fi.ThumbnailKey = thumbnailKey
+	}
+}
+
+func handleUpload(r *http.Request, p *multipart.Part) (fi *FileInfo) {
+	fi = &FileInfo{
+		Name: p.FileName(),
+		Type: p.Header.Get("Content-Type"),
+	}
+	if !fi.ValidateType() {
+		return
+	}
+	defer func() {
+		if rec := recover(); rec != nil {
+			log.Println(rec)
+			fi.Error = rec.(error).Error()
+		}
+	}()
+	var buffer bytes.Buffer
+	hash := crc32.NewIEEE()
+	mw := io.MultiWriter(&buffer, hash)
+	lr := &io.LimitedReader{R: p, N: MAX_FILE_SIZE + 1}
+	_, err := io.Copy(mw, lr)
+	check(err)
+	fi.Size = MAX_FILE_SIZE + 1 - lr.N
+	if !fi.ValidateSize() {
+		return
+	}
+	fi.SetKey(hash.Sum32())
+	item := &memcache.Item{
+		Key:   fi.Key,
+		Value: buffer.Bytes(),
+	}
+	context := appengine.NewContext(r)
+	err = memcache.Set(context, item)
+	check(err)
+	fi.createThumb(&buffer, context)
+	fi.CreateUrls(r, context)
+	return
+}
+
+func getFormValue(p *multipart.Part) string {
+	var b bytes.Buffer
+	io.CopyN(&b, p, int64(1<<20)) // Copy max: 1 MiB
+	return b.String()
+}
+
+func handleUploads(r *http.Request) (fileInfos []*FileInfo) {
+	fileInfos = make([]*FileInfo, 0)
+	mr, err := r.MultipartReader()
+	check(err)
+	r.Form, err = url.ParseQuery(r.URL.RawQuery)
+	check(err)
+	part, err := mr.NextPart()
+	for err == nil {
+		if name := part.FormName(); name != "" {
+			if part.FileName() != "" {
+				fileInfos = append(fileInfos, handleUpload(r, part))
+			} else {
+				r.Form[name] = append(r.Form[name], getFormValue(part))
+			}
+		}
+		part, err = mr.NextPart()
+	}
+	return
+}
+
+func validateRedirect(r *http.Request, redirect string) bool {
+	if redirect != "" {
+		var redirectAllowTarget *regexp.Regexp
+		if REDIRECT_ALLOW_TARGET != "" {
+			redirectAllowTarget = regexp.MustCompile(REDIRECT_ALLOW_TARGET)
+		} else {
+			referer := r.Referer()
+			if referer == "" {
+				return false
+			}
+			refererUrl, err := url.Parse(referer)
+			if err != nil {
+				return false
+			}
+			redirectAllowTarget = regexp.MustCompile("^" + regexp.QuoteMeta(
+				refererUrl.Scheme+"://"+refererUrl.Host+"/",
+			))
+		}
+		return redirectAllowTarget.MatchString(redirect)
+	}
+	return false
+}
+
+func get(w http.ResponseWriter, r *http.Request) {
+	if r.URL.Path == "/" {
+		http.Redirect(w, r, WEBSITE, http.StatusFound)
+		return
+	}
+	// Use RequestURI instead of r.URL.Path, as we need the encoded form:
+	key := extractKey(r)
+	parts := strings.Split(key, "/")
+	if len(parts) == 3 {
+		context := appengine.NewContext(r)
+		item, err := memcache.Get(context, key)
+		if err == nil {
+			w.Header().Add("X-Content-Type-Options", "nosniff")
+			contentType, _ := url.QueryUnescape(parts[0])
+			if !imageTypes.MatchString(contentType) {
+				contentType = "application/octet-stream"
+			}
+			w.Header().Add("Content-Type", contentType)
+			w.Header().Add(
+				"Cache-Control",
+				fmt.Sprintf("public,max-age=%d", EXPIRATION_TIME),
+			)
+			w.Write(item.Value)
+			return
+		}
+	}
+	http.Error(w, "404 Not Found", http.StatusNotFound)
+}
+
+func post(w http.ResponseWriter, r *http.Request) {
+	result := make(map[string][]*FileInfo, 1)
+	result["files"] = handleUploads(r)
+	b, err := json.Marshal(result)
+	check(err)
+	if redirect := r.FormValue("redirect"); validateRedirect(r, redirect) {
+		if strings.Contains(redirect, "%s") {
+			redirect = fmt.Sprintf(
+				redirect,
+				escape(string(b)),
+			)
+		}
+		http.Redirect(w, r, redirect, http.StatusFound)
+		return
+	}
+	w.Header().Set("Cache-Control", "no-cache")
+	jsonType := "application/json"
+	if strings.Index(r.Header.Get("Accept"), jsonType) != -1 {
+		w.Header().Set("Content-Type", jsonType)
+	}
+	fmt.Fprintln(w, string(b))
+}
+
+func delete(w http.ResponseWriter, r *http.Request) {
+	key := extractKey(r)
+	parts := strings.Split(key, "/")
+	if len(parts) == 3 {
+		result := make(map[string]bool, 1)
+		context := appengine.NewContext(r)
+		err := memcache.Delete(context, key)
+		if err == nil {
+			result[key] = true
+			contentType, _ := url.QueryUnescape(parts[0])
+			if imageTypes.MatchString(contentType) {
+				thumbnailKey := key + thumbSuffix + filepath.Ext(parts[2])
+				err := memcache.Delete(context, thumbnailKey)
+				if err == nil {
+					result[thumbnailKey] = true
+				}
+			}
+		}
+		w.Header().Set("Content-Type", "application/json")
+		b, err := json.Marshal(result)
+		check(err)
+		fmt.Fprintln(w, string(b))
+	} else {
+		http.Error(w, "405 Method not allowed", http.StatusMethodNotAllowed)
+	}
+}
+
+func handle(w http.ResponseWriter, r *http.Request) {
+	params, err := url.ParseQuery(r.URL.RawQuery)
+	check(err)
+	w.Header().Add("Access-Control-Allow-Origin", "*")
+	w.Header().Add(
+		"Access-Control-Allow-Methods",
+		"OPTIONS, HEAD, GET, POST, DELETE",
+	)
+	w.Header().Add(
+		"Access-Control-Allow-Headers",
+		"Content-Type, Content-Range, Content-Disposition",
+	)
+	switch r.Method {
+	case "OPTIONS", "HEAD":
+		return
+	case "GET":
+		get(w, r)
+	case "POST":
+		if len(params["_method"]) > 0 && params["_method"][0] == "DELETE" {
+			delete(w, r)
+		} else {
+			post(w, r)
+		}
+	case "DELETE":
+		delete(w, r)
+	default:
+		http.Error(w, "501 Not Implemented", http.StatusNotImplemented)
+	}
+}
+
+func init() {
+	http.HandleFunc("/", handle)
+}

vendor/blueimp/jquery-file-upload/server/gae-go/static/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow:

vendor/blueimp/jquery-file-upload/server/gae-python/app.yaml

@@ -0,0 +1,15 @@
+runtime: python27
+api_version: 1
+threadsafe: true
+
+libraries:
+- name: PIL
+  version: latest
+
+handlers:
+- url: /(favicon\.ico|robots\.txt)
+  static_files: static/\1
+  upload: static/(.*)
+  expiration: '1d'
+- url: /.*
+  script: main.app

vendor/blueimp/jquery-file-upload/server/gae-python/main.py

@@ -0,0 +1,204 @@
+# -*- coding: utf-8 -*-
+#
+# jQuery File Upload Plugin GAE Python Example
+# https://github.com/blueimp/jQuery-File-Upload
+#
+# Copyright 2011, Sebastian Tschan
+# https://blueimp.net
+#
+# Licensed under the MIT license:
+# https://opensource.org/licenses/MIT
+#
+
+from google.appengine.api import memcache, images
+import json
+import os
+import re
+import urllib
+import webapp2
+
+DEBUG=os.environ.get('SERVER_SOFTWARE', '').startswith('Dev')
+WEBSITE = 'https://blueimp.github.io/jQuery-File-Upload/'
+MIN_FILE_SIZE = 1  # bytes
+# Max file size is memcache limit (1MB) minus key size minus overhead:
+MAX_FILE_SIZE = 999000  # bytes
+IMAGE_TYPES = re.compile('image/(gif|p?jpeg|(x-)?png)')
+ACCEPT_FILE_TYPES = IMAGE_TYPES
+THUMB_MAX_WIDTH = 80
+THUMB_MAX_HEIGHT = 80
+THUMB_SUFFIX = '.'+str(THUMB_MAX_WIDTH)+'x'+str(THUMB_MAX_HEIGHT)+'.png'
+EXPIRATION_TIME = 300  # seconds
+# If set to None, only allow redirects to the referer protocol+host.
+# Set to a regexp for custom pattern matching against the redirect value:
+REDIRECT_ALLOW_TARGET = None
+
+class CORSHandler(webapp2.RequestHandler):
+    def cors(self):
+        headers = self.response.headers
+        headers['Access-Control-Allow-Origin'] = '*'
+        headers['Access-Control-Allow-Methods'] =\
+            'OPTIONS, HEAD, GET, POST, DELETE'
+        headers['Access-Control-Allow-Headers'] =\
+            'Content-Type, Content-Range, Content-Disposition'
+
+    def initialize(self, request, response):
+        super(CORSHandler, self).initialize(request, response)
+        self.cors()
+
+    def json_stringify(self, obj):
+        return json.dumps(obj, separators=(',', ':'))
+
+    def options(self, *args, **kwargs):
+        pass
+
+class UploadHandler(CORSHandler):
+    def validate(self, file):
+        if file['size'] < MIN_FILE_SIZE:
+            file['error'] = 'File is too small'
+        elif file['size'] > MAX_FILE_SIZE:
+            file['error'] = 'File is too big'
+        elif not ACCEPT_FILE_TYPES.match(file['type']):
+            file['error'] = 'Filetype not allowed'
+        else:
+            return True
+        return False
+
+    def validate_redirect(self, redirect):
+        if redirect:
+            if REDIRECT_ALLOW_TARGET:
+                return REDIRECT_ALLOW_TARGET.match(redirect)
+            referer = self.request.headers['referer']
+            if referer:
+                from urlparse import urlparse
+                parts = urlparse(referer)
+                redirect_allow_target = '^' + re.escape(
+                    parts.scheme + '://' + parts.netloc + '/'
+                )
+            return re.match(redirect_allow_target, redirect)
+        return False
+
+    def get_file_size(self, file):
+        file.seek(0, 2)  # Seek to the end of the file
+        size = file.tell()  # Get the position of EOF
+        file.seek(0)  # Reset the file position to the beginning
+        return size
+
+    def write_blob(self, data, info):
+        key = urllib.quote(info['type'].encode('utf-8'), '') +\
+            '/' + str(hash(data)) +\
+            '/' + urllib.quote(info['name'].encode('utf-8'), '')
+        try:
+            memcache.set(key, data, time=EXPIRATION_TIME)
+        except: #Failed to add to memcache
+            return (None, None)
+        thumbnail_key = None
+        if IMAGE_TYPES.match(info['type']):
+            try:
+                img = images.Image(image_data=data)
+                img.resize(
+                    width=THUMB_MAX_WIDTH,
+                    height=THUMB_MAX_HEIGHT
+                )
+                thumbnail_data = img.execute_transforms()
+                thumbnail_key = key + THUMB_SUFFIX
+                memcache.set(
+                    thumbnail_key,
+                    thumbnail_data,
+                    time=EXPIRATION_TIME
+                )
+            except: #Failed to resize Image or add to memcache
+                thumbnail_key = None
+        return (key, thumbnail_key)
+
+    def handle_upload(self):
+        results = []
+        for name, fieldStorage in self.request.POST.items():
+            if type(fieldStorage) is unicode:
+                continue
+            result = {}
+            result['name'] = urllib.unquote(fieldStorage.filename)
+            result['type'] = fieldStorage.type
+            result['size'] = self.get_file_size(fieldStorage.file)
+            if self.validate(result):
+                key, thumbnail_key = self.write_blob(
+                    fieldStorage.value,
+                    result
+                )
+                if key is not None:
+                    result['url'] = self.request.host_url + '/' + key
+                    result['deleteUrl'] = result['url']
+                    result['deleteType'] = 'DELETE'
+                    if thumbnail_key is not None:
+                        result['thumbnailUrl'] = self.request.host_url +\
+                             '/' + thumbnail_key
+                else:
+                    result['error'] = 'Failed to store uploaded file.'
+            results.append(result)
+        return results
+
+    def head(self):
+        pass
+
+    def get(self):
+        self.redirect(WEBSITE)
+
+    def post(self):
+        if (self.request.get('_method') == 'DELETE'):
+            return self.delete()
+        result = {'files': self.handle_upload()}
+        s = self.json_stringify(result)
+        redirect = self.request.get('redirect')
+        if self.validate_redirect(redirect):
+            return self.redirect(str(
+                redirect.replace('%s', urllib.quote(s, ''), 1)
+            ))
+        if 'application/json' in self.request.headers.get('Accept'):
+            self.response.headers['Content-Type'] = 'application/json'
+        self.response.write(s)
+
+class FileHandler(CORSHandler):
+    def normalize(self, str):
+        return urllib.quote(urllib.unquote(str), '')
+
+    def get(self, content_type, data_hash, file_name):
+        content_type = self.normalize(content_type)
+        file_name = self.normalize(file_name)
+        key = content_type + '/' + data_hash + '/' + file_name
+        data = memcache.get(key)
+        if data is None:
+            return self.error(404)
+        # Prevent browsers from MIME-sniffing the content-type:
+        self.response.headers['X-Content-Type-Options'] = 'nosniff'
+        content_type = urllib.unquote(content_type)
+        if not IMAGE_TYPES.match(content_type):
+            # Force a download dialog for non-image types:
+            content_type = 'application/octet-stream'
+        elif file_name.endswith(THUMB_SUFFIX):
+            content_type = 'image/png'
+        self.response.headers['Content-Type'] = content_type
+        # Cache for the expiration time:
+        self.response.headers['Cache-Control'] = 'public,max-age=%d' \
+            % EXPIRATION_TIME
+        self.response.write(data)
+
+    def delete(self, content_type, data_hash, file_name):
+        content_type = self.normalize(content_type)
+        file_name = self.normalize(file_name)
+        key = content_type + '/' + data_hash + '/' + file_name
+        result = {key: memcache.delete(key)}
+        content_type = urllib.unquote(content_type)
+        if IMAGE_TYPES.match(content_type):
+            thumbnail_key = key + THUMB_SUFFIX
+            result[thumbnail_key] = memcache.delete(thumbnail_key)
+        if 'application/json' in self.request.headers.get('Accept'):
+            self.response.headers['Content-Type'] = 'application/json'
+        s = self.json_stringify(result)
+        self.response.write(s)
+
+app = webapp2.WSGIApplication(
+    [
+        ('/', UploadHandler),
+        ('/(.+)/([^/]+)/([^/]+)', FileHandler)
+    ],
+    debug=DEBUG
+)

vendor/blueimp/jquery-file-upload/server/gae-python/static/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow:

vendor/blueimp/jquery-file-upload/server/php/Dockerfile

@@ -0,0 +1,44 @@
+FROM php:7.4-apache
+
+# Enable the Apache Headers module:
+RUN ln -s /etc/apache2/mods-available/headers.load \
+  /etc/apache2/mods-enabled/headers.load
+
+# Enable the Apache Rewrite module:
+RUN ln -s /etc/apache2/mods-available/rewrite.load \
+  /etc/apache2/mods-enabled/rewrite.load
+
+# Install GD, Imagick and ImageMagick as image conversion options:
+RUN DEBIAN_FRONTEND=noninteractive \
+  apt-get update && apt-get install -y --no-install-recommends \
+  libpng-dev \
+  libjpeg-dev \
+  libmagickwand-dev \
+  imagemagick \
+  && pecl install \
+  imagick \
+  && docker-php-ext-enable \
+  imagick \
+  && docker-php-ext-configure \
+  gd --with-jpeg=/usr/include/ \
+  && docker-php-ext-install \
+  gd \
+  # Uninstall obsolete packages:
+  && apt-get autoremove -y \
+  libpng-dev \
+  libjpeg-dev \
+  libmagickwand-dev \
+  # Remove obsolete files:
+  && apt-get clean \
+  && rm -rf \
+  /tmp/* \
+  /usr/share/doc/* \
+  /var/cache/* \
+  /var/lib/apt/lists/* \
+  /var/tmp/*
+
+# Use the default development configuration:
+RUN mv "$PHP_INI_DIR/php.ini-development" "$PHP_INI_DIR/php.ini"
+
+# Add a custom configuration file:
+COPY php.ini "$PHP_INI_DIR/conf.d/"

vendor/blueimp/jquery-file-upload/server/php/files/.htaccess

@@ -0,0 +1,50 @@
+# If you have not done so already, please first read SECURITY.md in the root
+# directory of this project or online:
+# https://github.com/blueimp/jQuery-File-Upload/blob/master/SECURITY.md
+#
+# The settings in this file require Apache to support configuration overrides
+# in .htaccess files, which is disabled by default since Apache v2.3.9 and needs
+# to be enabled for the directives in this file to have any effect, see also:
+# https://httpd.apache.org/docs/current/mod/core.html#allowoverride
+#
+# If you have full control over the web server, it is preferrable to define the
+# settings in the Apache configuration (e.g. /etc/apache2/apache2.conf) itself.
+#
+# Some of the directives require the Apache Headers module. If it is not
+# already enabled, please execute the following command and reload Apache:
+# sudo a2enmod headers
+#
+# Please note that the order of directives across configuration files matters,
+# see also:
+# https://httpd.apache.org/docs/current/sections.html#merging
+
+# The following directive matches all files and forces them to be handled as
+# static content, which prevents the server from parsing and executing files
+# that are associated with a dynamic runtime, e.g. PHP files.
+# It also forces their Content-Type header to "application/octet-stream" and
+# adds a "Content-Disposition: attachment" header to force a download dialog,
+# which prevents browsers from interpreting files in the context of the
+# web server, e.g. HTML files containing JavaScript.
+# Lastly it also prevents browsers from MIME-sniffing the Content-Type,
+# preventing them from interpreting a file as a different Content-Type than
+# the one sent by the webserver.
+<FilesMatch ".*">
+	SetHandler default-handler
+	ForceType application/octet-stream
+	Header set Content-Disposition attachment
+	Header set X-Content-Type-Options nosniff
+</FilesMatch>
+
+# The following directive matches known image files and unsets the forced
+# Content-Type so they can be served with their original mime type.
+# It also unsets the Content-Disposition header to allow displaying them
+# inline in the browser.
+<FilesMatch ".+\.(?i:(gif|jpe?g|png))$">
+	ForceType none
+	Header unset Content-Disposition
+</FilesMatch>
+
+# Uncomment the following lines to prevent unauthorized download of files:
+#AuthName "Authorization required"
+#AuthType Basic
+#require valid-user

vendor/blueimp/jquery-file-upload/server/php/index.php

@@ -0,0 +1,15 @@
+<?php
+/*
+ * jQuery File Upload Plugin PHP Example
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+error_reporting(E_ALL | E_STRICT);
+require('UploadHandler.php');
+$upload_handler = new UploadHandler();

vendor/blueimp/jquery-file-upload/server/php/php.ini

@@ -0,0 +1,5 @@
+max_execution_time = 300
+memory_limit = 500M
+post_max_size = 4G
+upload_max_filesize = 4G
+max_file_uploads = 50

vendor/blueimp/jquery-file-upload/test/index.html

@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<!--
+/*
+ * jQuery File Upload Test
+ * https://github.com/blueimp/jQuery-File-Upload
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+-->
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <title>jQuery File Upload Test</title>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="stylesheet" href="vendor/mocha.css" />
+  </head>
+  <body>
+    <div id="mocha"></div>
+    <script src="vendor/mocha.js"></script>
+    <script src="vendor/chai.js"></script>
+    <script>
+      mocha.setup('bdd');
+    </script>
+    <script src="https://blueimp.github.io/JavaScript-Load-Image/js/load-image.all.min.js"></script>
+    <script src="https://blueimp.github.io/JavaScript-Canvas-to-Blob/js/canvas-to-blob.min.js"></script>
+    <script
+      src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"
+      integrity="sha384-nvAa0+6Qg9clwYCGGPpDQLVpLNn0fRaROjHqs13t4Ggj3Ez50XnGQqc/r8MhnRDZ"
+      crossorigin="anonymous"
+    ></script>
+    <script src="../js/vendor/jquery.ui.widget.js"></script>
+    <script src="../js/jquery.iframe-transport.js"></script>
+    <script src="../js/jquery.fileupload.js"></script>
+    <script src="../js/jquery.fileupload-process.js"></script>
+    <script src="../js/jquery.fileupload-image.js"></script>
+    <script src="../js/jquery.fileupload-audio.js"></script>
+    <script src="../js/jquery.fileupload-video.js"></script>
+    <script src="../js/jquery.fileupload-validate.js"></script>
+    <script src="unit.js"></script>
+    <script>
+      mocha.checkLeaks();
+      mocha.run();
+    </script>
+  </body>
+</html>

vendor/blueimp/jquery-file-upload/test/unit.js

@@ -0,0 +1,989 @@
+/*
+ * jQuery File Upload Test
+ * https://github.com/blueimp/JavaScript-Load-Image
+ *
+ * Copyright 2010, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ */
+
+/* global beforeEach, afterEach, describe, it */
+/* eslint-disable new-cap */
+
+(function (expect, $) {
+  'use strict';
+
+  var canCreateBlob = !!window.dataURLtoBlob;
+  // 80x60px GIF image (color black, base64 data):
+  var b64DataGIF =
+    'R0lGODdhUAA8AIABAAAAAP///ywAAAAAUAA8AAACS4SPqcvtD6' +
+    'OctNqLs968+w+G4kiW5omm6sq27gvH8kzX9o3n+s73/g8MCofE' +
+    'ovGITCqXzKbzCY1Kp9Sq9YrNarfcrvcLDovH5PKsAAA7';
+  var imageUrlGIF = 'data:image/gif;base64,' + b64DataGIF;
+  var blobGIF = canCreateBlob && window.dataURLtoBlob(imageUrlGIF);
+
+  // 2x1px JPEG (color white, with the Exif orientation flag set to 6 and the
+  // IPTC ObjectName (2:5) set to 'objectname'):
+  var b64DataJPEG =
+    '/9j/4AAQSkZJRgABAQEAYABgAAD/4QAiRXhpZgAASUkqAAgAAAABABIBAwABAAAA' +
+    'BgASAAAAAAD/7QAsUGhvdG9zaG9wIDMuMAA4QklNBAQAAAAAAA8cAgUACm9iamVj' +
+    'dG5hbWUA/9sAQwABAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB' +
+    'AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB/9sAQwEBAQEBAQEBAQEBAQEBAQEB' +
+    'AQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB' +
+    '/8AAEQgAAQACAwEiAAIRAQMRAf/EAB8AAAEFAQEBAQEBAAAAAAAAAAABAgMEBQYH' +
+    'CAkKC//EALUQAAIBAwMCBAMFBQQEAAABfQECAwAEEQUSITFBBhNRYQcicRQygZGh' +
+    'CCNCscEVUtHwJDNicoIJChYXGBkaJSYnKCkqNDU2Nzg5OkNERUZHSElKU1RVVldY' +
+    'WVpjZGVmZ2hpanN0dXZ3eHl6g4SFhoeIiYqSk5SVlpeYmZqio6Slpqeoqaqys7S1' +
+    'tre4ubrCw8TFxsfIycrS09TV1tfY2drh4uPk5ebn6Onq8fLz9PX29/j5+v/EAB8B' +
+    'AAMBAQEBAQEBAQEAAAAAAAABAgMEBQYHCAkKC//EALURAAIBAgQEAwQHBQQEAAEC' +
+    'dwABAgMRBAUhMQYSQVEHYXETIjKBCBRCkaGxwQkjM1LwFWJy0QoWJDThJfEXGBka' +
+    'JicoKSo1Njc4OTpDREVGR0hJSlNUVVZXWFlaY2RlZmdoaWpzdHV2d3h5eoKDhIWG' +
+    'h4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ' +
+    '2uLj5OXm5+jp6vLz9PX29/j5+v/aAAwDAQACEQMRAD8A/v4ooooA/9k=';
+  var imageUrlJPEG = 'data:image/jpeg;base64,' + b64DataJPEG;
+  var blobJPEG = canCreateBlob && window.dataURLtoBlob(imageUrlJPEG);
+
+  var fileGIF, fileJPEG, files, items, eventObject;
+
+  var uploadURL = '../server/php/';
+
+  /**
+   * Creates a fileupload form and adds it to the DOM
+   *
+   * @returns {object} jQuery node
+   */
+  function createFileuploadForm() {
+    return $('<form><input type="file" name="files[]" multiple></form>')
+      .prop({
+        action: uploadURL,
+        method: 'POST',
+        enctype: 'multipart/form-data'
+      })
+      .css({ display: 'none' })
+      .appendTo(document.body);
+  }
+
+  /**
+   * Deletes all files from the upload server
+   *
+   * @param {Array} files Response files list
+   * @param {Function} callback Callback function
+   */
+  function deleteFiles(files, callback) {
+    $.when(
+      files.map(function (file) {
+        return $.ajax({
+          type: file.deleteType,
+          url: file.deleteUrl
+        });
+      })
+    ).always(function () {
+      callback();
+    });
+  }
+
+  beforeEach(function () {
+    fileGIF = new File([blobGIF], 'example.gif', { type: 'image/gif' });
+    fileJPEG = new File([blobJPEG], 'example.jpg', { type: 'image/jpeg' });
+    files = [fileGIF, fileJPEG];
+    items = [
+      {
+        getAsFile: function () {
+          return files[0];
+        }
+      },
+      {
+        getAsFile: function () {
+          return files[1];
+        }
+      }
+    ];
+    eventObject = {
+      originalEvent: {
+        dataTransfer: { files: files, types: ['Files'] },
+        clipboardData: { items: items }
+      }
+    };
+  });
+
+  afterEach(function (done) {
+    $.getJSON(uploadURL).then(function (result) {
+      deleteFiles(result.files, done);
+    });
+  });
+
+  describe('Initialization', function () {
+    var form;
+
+    beforeEach(function () {
+      form = createFileuploadForm();
+    });
+
+    afterEach(function () {
+      form.remove();
+    });
+
+    it('widget', function () {
+      form.fileupload();
+      expect(form.data('blueimp-fileupload')).to.be.an('object');
+    });
+
+    it('file input', function () {
+      form.fileupload();
+      expect(form.fileupload('option', 'fileInput').length).to.equal(1);
+    });
+
+    it('drop zone', function () {
+      form.fileupload();
+      expect(form.fileupload('option', 'dropZone').length).to.equal(1);
+    });
+
+    it('paste zone', function () {
+      form.fileupload({ pasteZone: document });
+      expect(form.fileupload('option', 'pasteZone').length).to.equal(1);
+    });
+
+    it('data attributes', function () {
+      form.attr('data-url', 'https://example.org');
+      form.fileupload();
+      expect(form.fileupload('option', 'url')).to.equal('https://example.org');
+      expect(form.data('blueimp-fileupload')).to.be.an('object');
+    });
+
+    it('event listeners', function () {
+      var eventsData = {};
+      form.fileupload({
+        autoUpload: false,
+        pasteZone: document,
+        dragover: function () {
+          eventsData.dragover = true;
+        },
+        dragenter: function () {
+          eventsData.dragenter = true;
+        },
+        dragleave: function () {
+          eventsData.dragleave = true;
+        },
+        drop: function (e, data) {
+          eventsData.drop = data;
+        },
+        paste: function (e, data) {
+          eventsData.paste = data;
+        },
+        change: function () {
+          eventsData.change = true;
+        }
+      });
+      form
+        .fileupload('option', 'fileInput')
+        .trigger($.Event('change', eventObject));
+      expect(eventsData.change).to.equal(true);
+      form
+        .fileupload('option', 'dropZone')
+        .trigger($.Event('dragover', eventObject))
+        .trigger($.Event('dragenter', eventObject))
+        .trigger($.Event('dragleave', eventObject))
+        .trigger($.Event('drop', eventObject));
+      expect(eventsData.dragover).to.equal(true);
+      expect(eventsData.dragenter).to.equal(true);
+      expect(eventsData.dragleave).to.equal(true);
+      expect(eventsData.drop.files).to.deep.equal(files);
+      form
+        .fileupload('option', 'pasteZone')
+        .trigger($.Event('paste', eventObject));
+      expect(eventsData.paste.files).to.deep.equal(files);
+    });
+  });
+
+  describe('API', function () {
+    var form;
+
+    beforeEach(function () {
+      form = createFileuploadForm().fileupload({
+        dataType: 'json',
+        autoUpload: false
+      });
+    });
+
+    afterEach(function () {
+      form.remove();
+    });
+
+    it('destroy', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        pasteZone: document,
+        dragover: function () {
+          eventsData.dragover = true;
+        },
+        dragenter: function () {
+          eventsData.dragenter = true;
+        },
+        dragleave: function () {
+          eventsData.dragleave = true;
+        },
+        drop: function (e, data) {
+          eventsData.drop = data;
+        },
+        paste: function (e, data) {
+          eventsData.paste = data;
+        },
+        change: function () {
+          eventsData.change = true;
+        }
+      });
+      var fileInput = form.fileupload('option', 'fileInput');
+      var dropZone = form.fileupload('option', 'dropZone');
+      var pasteZone = form.fileupload('option', 'pasteZone');
+      form.fileupload('destroy');
+      expect(form.data('blueimp-fileupload')).to.equal();
+      fileInput.trigger($.Event('change', eventObject));
+      expect(eventsData.change).to.equal();
+      dropZone
+        .trigger($.Event('dragover', eventObject))
+        .trigger($.Event('dragenter', eventObject))
+        .trigger($.Event('dragleave', eventObject))
+        .trigger($.Event('drop', eventObject));
+      expect(eventsData.dragover).to.equal();
+      expect(eventsData.dragenter).to.equal();
+      expect(eventsData.dragleave).to.equal();
+      expect(eventsData.drop).to.equal();
+      pasteZone.trigger($.Event('paste', eventObject));
+      expect(eventsData.paste).to.equal();
+    });
+
+    it('disable', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        pasteZone: document,
+        dragover: function () {
+          eventsData.dragover = true;
+        },
+        dragenter: function () {
+          eventsData.dragenter = true;
+        },
+        dragleave: function () {
+          eventsData.dragleave = true;
+        },
+        drop: function (e, data) {
+          eventsData.drop = data;
+        },
+        paste: function (e, data) {
+          eventsData.paste = data;
+        },
+        change: function () {
+          eventsData.change = true;
+        }
+      });
+      form.fileupload('disable');
+      form
+        .fileupload('option', 'fileInput')
+        .trigger($.Event('change', eventObject));
+      expect(eventsData.change).to.equal();
+      form
+        .fileupload('option', 'dropZone')
+        .trigger($.Event('dragover', eventObject))
+        .trigger($.Event('dragenter', eventObject))
+        .trigger($.Event('dragleave', eventObject))
+        .trigger($.Event('drop', eventObject));
+      expect(eventsData.dragover).to.equal();
+      expect(eventsData.dragenter).to.equal();
+      expect(eventsData.dragleave).to.equal();
+      expect(eventsData.drop).to.equal();
+      form
+        .fileupload('option', 'pasteZone')
+        .trigger($.Event('paste', eventObject));
+      expect(eventsData.paste).to.equal();
+    });
+
+    it('enable', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        pasteZone: document,
+        dragover: function () {
+          eventsData.dragover = true;
+        },
+        dragenter: function () {
+          eventsData.dragenter = true;
+        },
+        dragleave: function () {
+          eventsData.dragleave = true;
+        },
+        drop: function (e, data) {
+          eventsData.drop = data;
+        },
+        paste: function (e, data) {
+          eventsData.paste = data;
+        },
+        change: function () {
+          eventsData.change = true;
+        }
+      });
+      form.fileupload('disable');
+      form.fileupload('enable');
+      form
+        .fileupload('option', 'fileInput')
+        .trigger($.Event('change', eventObject));
+      expect(eventsData.change).to.equal(true);
+      form
+        .fileupload('option', 'dropZone')
+        .trigger($.Event('dragover', eventObject))
+        .trigger($.Event('dragenter', eventObject))
+        .trigger($.Event('dragleave', eventObject))
+        .trigger($.Event('drop', eventObject));
+      expect(eventsData.dragover).to.equal(true);
+      expect(eventsData.dragenter).to.equal(true);
+      expect(eventsData.dragleave).to.equal(true);
+      expect(eventsData.drop.files).to.deep.equal(files);
+      form
+        .fileupload('option', 'pasteZone')
+        .trigger($.Event('paste', eventObject));
+      expect(eventsData.paste.files).to.deep.equal(files);
+    });
+
+    it('option', function () {
+      var eventsData = {};
+      form.fileupload('option', 'drop', function (e, data) {
+        eventsData.drop = data;
+      });
+      var dropZone = form
+        .fileupload('option', 'dropZone')
+        .trigger($.Event('drop', eventObject));
+      expect(eventsData.drop.files).to.deep.equal(files);
+      delete eventsData.drop;
+      form.fileupload('option', 'dropZone', null);
+      dropZone.trigger($.Event('drop', eventObject));
+      expect(eventsData.drop).to.equal();
+      form.fileupload('option', {
+        dropZone: dropZone
+      });
+      dropZone.trigger($.Event('drop', eventObject));
+      expect(eventsData.drop.files).to.deep.equal(files);
+    });
+
+    it('add', function () {
+      var eventData = [];
+      form.fileupload('option', 'add', function (e, data) {
+        eventData.push(data);
+      });
+      form.fileupload('add', { files: files });
+      expect(eventData.length).to.equal(2);
+      expect(eventData[0].files[0]).to.equal(files[0]);
+      expect(eventData[1].files[0]).to.equal(files[1]);
+    });
+
+    it('send', function (done) {
+      this.slow(200);
+      form.fileupload('send', { files: files }).complete(function (result) {
+        var uploadedFiles = result.responseJSON.files;
+        expect(uploadedFiles.length).to.equal(2);
+        expect(uploadedFiles[0].type).to.equal(files[0].type);
+        expect(uploadedFiles[0].error).to.equal();
+        expect(uploadedFiles[1].type).to.equal(files[1].type);
+        expect(uploadedFiles[1].error).to.equal();
+        done();
+      });
+    });
+  });
+
+  describe('Callbacks', function () {
+    var form;
+
+    beforeEach(function () {
+      form = createFileuploadForm().fileupload({ dataType: 'json' });
+    });
+
+    afterEach(function () {
+      form.remove();
+    });
+
+    it('add', function () {
+      var eventData = [];
+      form.fileupload('option', 'add', function (e, data) {
+        eventData.push(data);
+      });
+      form.fileupload('add', { files: files });
+      expect(eventData.length).to.equal(2);
+      expect(eventData[0].files[0]).to.equal(files[0]);
+      expect(eventData[1].files[0]).to.equal(files[1]);
+    });
+
+    it('submit', function (done) {
+      this.slow(200);
+      var eventData = [];
+      form.fileupload('option', {
+        submit: function (e, data) {
+          eventData.push(data);
+        },
+        stop: function () {
+          if (eventData.length < 2) return;
+          expect(eventData[0].files[0]).to.equal(files[0]);
+          expect(eventData[1].files[0]).to.equal(files[1]);
+          done();
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+
+    it('send', function (done) {
+      this.slow(200);
+      var eventData = [];
+      form.fileupload('option', {
+        send: function (e, data) {
+          eventData.push(data);
+        },
+        stop: function () {
+          expect(eventData.length).to.equal(1);
+          expect(eventData[0].files).to.deep.equal(files);
+          done();
+        }
+      });
+      form.fileupload('send', { files: files });
+    });
+
+    it('done', function (done) {
+      this.slow(200);
+      var eventData = [];
+      form.fileupload('option', {
+        done: function (e, data) {
+          eventData.push(data);
+        },
+        stop: function () {
+          if (eventData.length < 2) return;
+          expect(eventData[0].result.files.length).to.equal(1);
+          expect(eventData[1].result.files.length).to.equal(1);
+          done();
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+
+    it('fail', function (done) {
+      this.slow(200);
+      var eventData = [];
+      form.fileupload('option', {
+        url: uploadURL + '404',
+        fail: function (e, data) {
+          eventData.push(data);
+        },
+        stop: function () {
+          if (eventData.length < 2) return;
+          expect(eventData[0].result).to.equal();
+          expect(eventData[1].result).to.equal();
+          done();
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+
+    it('always', function (done) {
+      this.slow(200);
+      var eventData = [];
+      form.fileupload('option', {
+        always: function (e, data) {
+          eventData.push(data);
+        },
+        stop: function () {
+          if (eventData.length < 2) {
+            expect(eventData[0].result).to.equal();
+            form.fileupload('add', { files: [fileGIF] });
+            return;
+          }
+          expect(eventData[1].result.files.length).to.equal(1);
+          done();
+        }
+      });
+      form.fileupload('add', { files: [fileGIF], url: uploadURL + '404' });
+    });
+
+    it('progress', function (done) {
+      this.slow(200);
+      var loaded;
+      var total;
+      form.fileupload('option', {
+        progress: function (e, data) {
+          loaded = data.loaded;
+          total = data.total;
+          expect(loaded).to.be.at.most(total);
+        },
+        stop: function () {
+          expect(loaded).to.equal(total);
+          done();
+        }
+      });
+      form.fileupload('add', { files: [fileGIF] });
+    });
+
+    it('progressall', function (done) {
+      this.slow(200);
+      var loaded;
+      var total;
+      var completed = 0;
+      form.fileupload('option', {
+        progressall: function (e, data) {
+          loaded = data.loaded;
+          total = data.total;
+          expect(loaded).to.be.at.most(total);
+        },
+        always: function () {
+          completed++;
+        },
+        stop: function () {
+          if (completed < 2) return;
+          expect(loaded).to.equal(total);
+          done();
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+
+    it('start', function (done) {
+      this.slow(200);
+      var started;
+      form.fileupload('option', {
+        start: function () {
+          started = true;
+        },
+        stop: function () {
+          expect(started).to.equal(true);
+          done();
+        }
+      });
+      form.fileupload('add', { files: [fileGIF] });
+    });
+
+    it('stop', function (done) {
+      this.slow(200);
+      form.fileupload('option', {
+        stop: function () {
+          done();
+        }
+      });
+      form.fileupload('add', { files: [fileGIF] });
+    });
+
+    it('dragover', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        autoUpload: false,
+        dragover: function () {
+          eventsData.dragover = true;
+        }
+      });
+      form
+        .fileupload('option', 'dropZone')
+        .trigger($.Event('dragover', eventObject));
+      expect(eventsData.dragover).to.equal(true);
+    });
+
+    it('dragenter', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        autoUpload: false,
+        dragenter: function () {
+          eventsData.dragenter = true;
+        }
+      });
+      form
+        .fileupload('option', 'dropZone')
+        .trigger($.Event('dragenter', eventObject));
+      expect(eventsData.dragenter).to.equal(true);
+    });
+
+    it('dragleave', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        autoUpload: false,
+        dragleave: function () {
+          eventsData.dragleave = true;
+        }
+      });
+      form
+        .fileupload('option', 'dropZone')
+        .trigger($.Event('dragleave', eventObject));
+      expect(eventsData.dragleave).to.equal(true);
+    });
+
+    it('drop', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        autoUpload: false,
+        drop: function (e, data) {
+          eventsData.drop = data;
+        }
+      });
+      form
+        .fileupload('option', 'dropZone')
+        .trigger($.Event('drop', eventObject));
+      expect(eventsData.drop.files).to.deep.equal(files);
+    });
+
+    it('paste', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        autoUpload: false,
+        pasteZone: document,
+        paste: function (e, data) {
+          eventsData.paste = data;
+        }
+      });
+      form
+        .fileupload('option', 'pasteZone')
+        .trigger($.Event('paste', eventObject));
+      expect(eventsData.paste.files).to.deep.equal(files);
+    });
+
+    it('change', function () {
+      var eventsData = {};
+      form.fileupload('option', {
+        autoUpload: false,
+        change: function () {
+          eventsData.change = true;
+        }
+      });
+      form
+        .fileupload('option', 'fileInput')
+        .trigger($.Event('change', eventObject));
+      expect(eventsData.change).to.equal(true);
+    });
+  });
+
+  describe('Options', function () {
+    var form;
+
+    beforeEach(function () {
+      form = createFileuploadForm();
+    });
+
+    afterEach(function () {
+      form.remove();
+    });
+
+    it('paramName', function (done) {
+      form.fileupload({
+        send: function (e, data) {
+          expect(data.paramName[0]).to.equal(
+            form.fileupload('option', 'fileInput').prop('name')
+          );
+          done();
+          return false;
+        }
+      });
+      form.fileupload('add', { files: [fileGIF] });
+    });
+
+    it('url', function (done) {
+      form.fileupload({
+        send: function (e, data) {
+          expect(data.url).to.equal(form.prop('action'));
+          done();
+          return false;
+        }
+      });
+      form.fileupload('add', { files: [fileGIF] });
+    });
+
+    it('type', function (done) {
+      form.fileupload({
+        type: 'PUT',
+        send: function (e, data) {
+          expect(data.type).to.equal('PUT');
+          done();
+          return false;
+        }
+      });
+      form.fileupload('add', { files: [fileGIF] });
+    });
+
+    it('replaceFileInput', function () {
+      form.fileupload();
+      var fileInput = form.fileupload('option', 'fileInput');
+      fileInput.trigger($.Event('change', eventObject));
+      expect(form.fileupload('option', 'fileInput')[0]).to.not.equal(
+        fileInput[0]
+      );
+      form.fileupload('option', 'replaceFileInput', false);
+      fileInput = form.fileupload('option', 'fileInput');
+      fileInput.trigger($.Event('change', eventObject));
+      expect(form.fileupload('option', 'fileInput')[0]).to.equal(fileInput[0]);
+    });
+
+    it('forceIframeTransport', function (done) {
+      form.fileupload({
+        forceIframeTransport: 'PUT',
+        send: function (e, data) {
+          expect(data.dataType.substr(0, 6)).to.equal('iframe');
+          done();
+          return false;
+        }
+      });
+      form.fileupload('add', { files: [fileGIF] });
+    });
+
+    it('singleFileUploads', function (done) {
+      form.fileupload({
+        singleFileUploads: false,
+        send: function (e, data) {
+          expect(data.files).to.deep.equal(files);
+          done();
+          return false;
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+
+    it('limitMultiFileUploads', function (done) {
+      var completed = 0;
+      form.fileupload({
+        singleFileUploads: false,
+        limitMultiFileUploads: 2,
+        send: function (e, data) {
+          expect(data.files).to.deep.equal(files);
+          completed++;
+          if (completed < 2) return;
+          done();
+          return false;
+        }
+      });
+      form.fileupload('add', { files: files.concat(files) });
+    });
+
+    it('limitMultiFileUploadSize', function (done) {
+      var completed = 0;
+      form.fileupload({
+        singleFileUploads: false,
+        limitMultiFileUploadSize: files[0].size + files[1].size,
+        limitMultiFileUploadSizeOverhead: 0,
+        send: function (e, data) {
+          expect(data.files).to.deep.equal(files);
+          completed++;
+          if (completed < 2) return;
+          done();
+          return false;
+        }
+      });
+      form.fileupload('add', { files: files.concat(files) });
+    });
+
+    it('sequentialUploads', function (done) {
+      this.slow(400);
+      var completed = 0;
+      var events = [];
+      form.fileupload({
+        sequentialUploads: true,
+        dataType: 'json',
+        send: function () {
+          events.push('send');
+        },
+        always: function () {
+          events.push('complete');
+          completed++;
+        },
+        stop: function () {
+          if (completed === 4) {
+            expect(events.join(',')).to.equal(
+              [
+                'send',
+                'complete',
+                'send',
+                'complete',
+                'send',
+                'complete',
+                'send',
+                'complete'
+              ].join(',')
+            );
+            done();
+          }
+        }
+      });
+      form.fileupload('add', { files: files.concat(files) });
+    });
+
+    it('limitConcurrentUploads', function (done) {
+      this.slow(800);
+      var completed = 0;
+      var loadCount = 0;
+      form.fileupload({
+        limitConcurrentUploads: 2,
+        dataType: 'json',
+        send: function () {
+          loadCount++;
+          expect(loadCount).to.be.at.most(2);
+        },
+        always: function () {
+          completed++;
+          loadCount--;
+        },
+        stop: function () {
+          if (completed === 8) {
+            done();
+          }
+        }
+      });
+      form.fileupload('add', {
+        files: files.concat(files).concat(files).concat(files)
+      });
+    });
+
+    it('multipart', function (done) {
+      form.fileupload({
+        multipart: false,
+        send: function (e, data) {
+          expect(data.contentType).to.equal(fileGIF.type);
+          expect(data.headers['Content-Disposition']).to.equal(
+            'attachment; filename="' + fileGIF.name + '"'
+          );
+          done();
+          return false;
+        }
+      });
+      form.fileupload('add', { files: [fileGIF] });
+    });
+
+    it('uniqueFilenames', function (done) {
+      form.fileupload({
+        uniqueFilenames: {},
+        send: function (e, data) {
+          var formFiles = data.data.getAll('files[]');
+          expect(formFiles[0].name).to.equal(fileGIF.name);
+          expect(formFiles[1].name).to.equal(
+            fileGIF.name.replace('.gif', ' (1).gif')
+          );
+          expect(formFiles[2].name).to.equal(
+            fileGIF.name.replace('.gif', ' (2).gif')
+          );
+          done();
+          return false;
+        }
+      });
+      form.fileupload('send', { files: [fileGIF, fileGIF, fileGIF] });
+    });
+
+    it('maxChunkSize', function (done) {
+      this.slow(400);
+      var events = [];
+      form.fileupload({
+        maxChunkSize: 32,
+        dataType: 'json',
+        chunkbeforesend: function () {
+          events.push('chunkbeforesend');
+        },
+        chunksend: function () {
+          events.push('chunksend');
+        },
+        chunkdone: function () {
+          events.push('chunkdone');
+        },
+        done: function (e, data) {
+          var uploadedFile = data.result.files[0];
+          expect(uploadedFile.type).to.equal(fileGIF.type);
+          expect(uploadedFile.size).to.equal(fileGIF.size);
+        },
+        stop: function () {
+          expect(events.join(',')).to.equal(
+            [
+              'chunkbeforesend',
+              'chunksend',
+              'chunkdone',
+              'chunkbeforesend',
+              'chunksend',
+              'chunkdone',
+              'chunkbeforesend',
+              'chunksend',
+              'chunkdone',
+              'chunkbeforesend',
+              'chunksend',
+              'chunkdone'
+            ].join(',')
+          );
+          done();
+        }
+      });
+      form.fileupload('send', { files: [fileGIF] });
+    });
+
+    it('acceptFileTypes', function (done) {
+      var processData;
+      form.fileupload({
+        acceptFileTypes: /^image\/gif$/,
+        singleFileUploads: false,
+        processalways: function (e, data) {
+          processData = data;
+        },
+        processstop: function () {
+          expect(processData.files[0].error).to.equal();
+          expect(processData.files[1].error).to.equal(
+            form.fileupload('option').i18n('acceptFileTypes')
+          );
+          done();
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+
+    it('maxFileSize', function (done) {
+      var processData;
+      form.fileupload({
+        maxFileSize: 200,
+        singleFileUploads: false,
+        processalways: function (e, data) {
+          processData = data;
+        },
+        processstop: function () {
+          expect(processData.files[0].error).to.equal();
+          expect(processData.files[1].error).to.equal(
+            form.fileupload('option').i18n('maxFileSize')
+          );
+          done();
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+
+    it('minFileSize', function (done) {
+      var processData;
+      form.fileupload({
+        minFileSize: 200,
+        singleFileUploads: false,
+        processalways: function (e, data) {
+          processData = data;
+        },
+        processstop: function () {
+          expect(processData.files[0].error).to.equal(
+            form.fileupload('option').i18n('minFileSize')
+          );
+          expect(processData.files[1].error).to.equal();
+          done();
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+
+    it('maxNumberOfFiles', function (done) {
+      var processData;
+      form.fileupload({
+        maxNumberOfFiles: 2,
+        getNumberOfFiles: function () {
+          return 2;
+        },
+        singleFileUploads: false,
+        processalways: function (e, data) {
+          processData = data;
+        },
+        processstop: function () {
+          expect(processData.files[0].error).to.equal(
+            form.fileupload('option').i18n('maxNumberOfFiles')
+          );
+          expect(processData.files[1].error).to.equal(
+            form.fileupload('option').i18n('maxNumberOfFiles')
+          );
+          done();
+        }
+      });
+      form.fileupload('add', { files: files });
+    });
+  });
+})(this.chai.expect, this.jQuery);

vendor/blueimp/jquery-file-upload/test/vendor/mocha.css

@@ -0,0 +1,325 @@
+@charset "utf-8";
+
+body {
+  margin:0;
+}
+
+#mocha {
+  font: 20px/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
+  margin: 60px 50px;
+}
+
+#mocha ul,
+#mocha li {
+  margin: 0;
+  padding: 0;
+}
+
+#mocha ul {
+  list-style: none;
+}
+
+#mocha h1,
+#mocha h2 {
+  margin: 0;
+}
+
+#mocha h1 {
+  margin-top: 15px;
+  font-size: 1em;
+  font-weight: 200;
+}
+
+#mocha h1 a {
+  text-decoration: none;
+  color: inherit;
+}
+
+#mocha h1 a:hover {
+  text-decoration: underline;
+}
+
+#mocha .suite .suite h1 {
+  margin-top: 0;
+  font-size: .8em;
+}
+
+#mocha .hidden {
+  display: none;
+}
+
+#mocha h2 {
+  font-size: 12px;
+  font-weight: normal;
+  cursor: pointer;
+}
+
+#mocha .suite {
+  margin-left: 15px;
+}
+
+#mocha .test {
+  margin-left: 15px;
+  overflow: hidden;
+}
+
+#mocha .test.pending:hover h2::after {
+  content: '(pending)';
+  font-family: arial, sans-serif;
+}
+
+#mocha .test.pass.medium .duration {
+  background: #c09853;
+}
+
+#mocha .test.pass.slow .duration {
+  background: #b94a48;
+}
+
+#mocha .test.pass::before {
+  content: '✓';
+  font-size: 12px;
+  display: block;
+  float: left;
+  margin-right: 5px;
+  color: #00d6b2;
+}
+
+#mocha .test.pass .duration {
+  font-size: 9px;
+  margin-left: 5px;
+  padding: 2px 5px;
+  color: #fff;
+  -webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  -moz-box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  box-shadow: inset 0 1px 1px rgba(0,0,0,.2);
+  -webkit-border-radius: 5px;
+  -moz-border-radius: 5px;
+  -ms-border-radius: 5px;
+  -o-border-radius: 5px;
+  border-radius: 5px;
+}
+
+#mocha .test.pass.fast .duration {
+  display: none;
+}
+
+#mocha .test.pending {
+  color: #0b97c4;
+}
+
+#mocha .test.pending::before {
+  content: '◦';
+  color: #0b97c4;
+}
+
+#mocha .test.fail {
+  color: #c00;
+}
+
+#mocha .test.fail pre {
+  color: black;
+}
+
+#mocha .test.fail::before {
+  content: '✖';
+  font-size: 12px;
+  display: block;
+  float: left;
+  margin-right: 5px;
+  color: #c00;
+}
+
+#mocha .test pre.error {
+  color: #c00;
+  max-height: 300px;
+  overflow: auto;
+}
+
+#mocha .test .html-error {
+  overflow: auto;
+  color: black;
+  display: block;
+  float: left;
+  clear: left;
+  font: 12px/1.5 monaco, monospace;
+  margin: 5px;
+  padding: 15px;
+  border: 1px solid #eee;
+  max-width: 85%; /*(1)*/
+  max-width: -webkit-calc(100% - 42px);
+  max-width: -moz-calc(100% - 42px);
+  max-width: calc(100% - 42px); /*(2)*/
+  max-height: 300px;
+  word-wrap: break-word;
+  border-bottom-color: #ddd;
+  -webkit-box-shadow: 0 1px 3px #eee;
+  -moz-box-shadow: 0 1px 3px #eee;
+  box-shadow: 0 1px 3px #eee;
+  -webkit-border-radius: 3px;
+  -moz-border-radius: 3px;
+  border-radius: 3px;
+}
+
+#mocha .test .html-error pre.error {
+  border: none;
+  -webkit-border-radius: 0;
+  -moz-border-radius: 0;
+  border-radius: 0;
+  -webkit-box-shadow: 0;
+  -moz-box-shadow: 0;
+  box-shadow: 0;
+  padding: 0;
+  margin: 0;
+  margin-top: 18px;
+  max-height: none;
+}
+
+/**
+ * (1): approximate for browsers not supporting calc
+ * (2): 42 = 2*15 + 2*10 + 2*1 (padding + margin + border)
+ *      ^^ seriously
+ */
+#mocha .test pre {
+  display: block;
+  float: left;
+  clear: left;
+  font: 12px/1.5 monaco, monospace;
+  margin: 5px;
+  padding: 15px;
+  border: 1px solid #eee;
+  max-width: 85%; /*(1)*/
+  max-width: -webkit-calc(100% - 42px);
+  max-width: -moz-calc(100% - 42px);
+  max-width: calc(100% - 42px); /*(2)*/
+  word-wrap: break-word;
+  border-bottom-color: #ddd;
+  -webkit-box-shadow: 0 1px 3px #eee;
+  -moz-box-shadow: 0 1px 3px #eee;
+  box-shadow: 0 1px 3px #eee;
+  -webkit-border-radius: 3px;
+  -moz-border-radius: 3px;
+  border-radius: 3px;
+}
+
+#mocha .test h2 {
+  position: relative;
+}
+
+#mocha .test a.replay {
+  position: absolute;
+  top: 3px;
+  right: 0;
+  text-decoration: none;
+  vertical-align: middle;
+  display: block;
+  width: 15px;
+  height: 15px;
+  line-height: 15px;
+  text-align: center;
+  background: #eee;
+  font-size: 15px;
+  -webkit-border-radius: 15px;
+  -moz-border-radius: 15px;
+  border-radius: 15px;
+  -webkit-transition:opacity 200ms;
+  -moz-transition:opacity 200ms;
+  -o-transition:opacity 200ms;
+  transition: opacity 200ms;
+  opacity: 0.3;
+  color: #888;
+}
+
+#mocha .test:hover a.replay {
+  opacity: 1;
+}
+
+#mocha-report.pass .test.fail {
+  display: none;
+}
+
+#mocha-report.fail .test.pass {
+  display: none;
+}
+
+#mocha-report.pending .test.pass,
+#mocha-report.pending .test.fail {
+  display: none;
+}
+#mocha-report.pending .test.pass.pending {
+  display: block;
+}
+
+#mocha-error {
+  color: #c00;
+  font-size: 1.5em;
+  font-weight: 100;
+  letter-spacing: 1px;
+}
+
+#mocha-stats {
+  position: fixed;
+  top: 15px;
+  right: 10px;
+  font-size: 12px;
+  margin: 0;
+  color: #888;
+  z-index: 1;
+}
+
+#mocha-stats .progress {
+  float: right;
+  padding-top: 0;
+
+  /**
+   * Set safe initial values, so mochas .progress does not inherit these
+   * properties from Bootstrap .progress (which causes .progress height to
+   * equal line height set in Bootstrap).
+   */
+  height: auto;
+  -webkit-box-shadow: none;
+  -moz-box-shadow: none;
+  box-shadow: none;
+  background-color: initial;
+}
+
+#mocha-stats em {
+  color: black;
+}
+
+#mocha-stats a {
+  text-decoration: none;
+  color: inherit;
+}
+
+#mocha-stats a:hover {
+  border-bottom: 1px solid #eee;
+}
+
+#mocha-stats li {
+  display: inline-block;
+  margin: 0 5px;
+  list-style: none;
+  padding-top: 11px;
+}
+
+#mocha-stats canvas {
+  width: 40px;
+  height: 40px;
+}
+
+#mocha code .comment { color: #ddd; }
+#mocha code .init { color: #2f6fad; }
+#mocha code .string { color: #5890ad; }
+#mocha code .keyword { color: #8a6343; }
+#mocha code .number { color: #2f6fad; }
+
+@media screen and (max-device-width: 480px) {
+  #mocha {
+    margin: 60px 0px;
+  }
+
+  #mocha #stats {
+    position: absolute;
+  }
+}

vendor/blueimp/jquery-file-upload/wdio/LICENSE.txt

@@ -0,0 +1,20 @@
+MIT License
+
+Copyright © 2019 Sebastian Tschan, https://blueimp.net
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/blueimp/jquery-file-upload/wdio/bin/forward-ports.sh

@@ -0,0 +1,85 @@
+#!/bin/sh
+
+#
+# Adds TCP/UDP port forwarding rules to the pf firewall (MacOS/BSD).
+#
+# Adds rules for both TCP and UDP in addition to those from /etc/pf.conf.
+# Requires an existing rdr-anchor entry in /etc/pf.conf.
+# Only adds rules temporarily, without changing any files.
+#
+# Usage: ./forward-ports.sh [[nic:]port=[ip:]port [...]]
+#
+# If no network interface is given, forwards from all interfaces.
+# If no IP is given, forwards to 127.0.0.1.
+# If no port forwarding rule is given, resets to the rules from /etc/pf.conf.
+#
+# e.g. forwarding ports 80 and 443 on network interface en0 to ports 8080 and
+# 8443 on localhost respectively:
+# ./forward-ports.sh en0:80=8080 en0:443=8443
+#
+# Copyright 2019, Sebastian Tschan
+# https://blueimp.net
+#
+# Licensed under the MIT license:
+# https://opensource.org/licenses/MIT
+#
+
+set -e
+
+RULES=
+NEWLINE='
+'
+
+print_usage_exit() {
+  if [ -n "$RULES" ]; then
+    printf '\nError in custom rules:\n%s\n' "$RULES" >&2
+  fi
+  echo "Usage: $0 [[nic:]port=[ip:]port [...]]" >&2
+  exit 1
+}
+
+print_nat_rules() {
+  echo
+  echo 'Loaded NAT rules:'
+  sudo pfctl -s nat 2>/dev/null
+  echo
+}
+
+# Print usage and exit if option arguments like "-h" are used:
+if [ "${1#-}" != "$1" ]; then print_usage_exit; fi
+
+while test $# -gt 0; do
+  # Separate the from=to parts:
+  from=${1%=*}
+  to=${1#*=}
+  # If from part has a nic defined, extract it, else forward from all:
+  case "$from" in
+    *:*) nic="on ${from%:*}";;
+      *) nic=;;
+  esac
+  # Extract the port to forward from:
+  from_port=${from##*:}
+  # If to part has an IP defined, extract it, else forward to 127.0.0.1:
+  case "$to" in
+    *:*) to_ip=${to%:*};;
+      *) to_ip=127.0.0.1;;
+  esac
+  # Extract the port to forward to:
+  to_port=${to##*:}
+  # Create the packet filter (pf) forwarding rule for both TCP and UDP:
+  rule=$(
+    printf \
+      'rdr pass %s inet proto %s from any to any port %s -> %s port %s' \
+      "$nic" '{tcp udp}' "$from_port" "$to_ip" "$to_port"
+  )
+  # Add it to the list of rules:
+  RULES="$RULES$rule$NEWLINE"
+  shift
+done
+
+# Add the rules after the line matching "rdr-anchor" in /etc/pf.conf, print the
+# combined rules to STDOUT and load the rules into pf from STDIN.
+# Finally, display the loaded NAT rules or print the script usage on failure:
+# shellcheck disable=SC2015
+printf %s "$RULES" | sed -e '/rdr-anchor/r /dev/stdin' /etc/pf.conf |
+sudo pfctl -Ef - 2>/dev/null && print_nat_rules || print_usage_exit

vendor/blueimp/jquery-file-upload/wdio/bin/safaridriver.sh

@@ -0,0 +1,43 @@
+#!/bin/sh
+
+if [ "$1" = -t ]; then
+  BIN='/Applications/Safari Technology Preview.app/Contents/MacOS/safaridriver'
+  shift
+else
+  BIN=safaridriver
+fi
+
+SCREEN='Capture screen'
+
+if [ -z "$1" ]; then
+  OUTPUT=$(ffmpeg -f avfoundation -list_devices true -i - 2>&1 | grep "$SCREEN")
+  if [ "$(echo "$OUTPUT" | grep -c ^)" -gt 1 ]; then
+    echo 'Please select the input device by entering its [index] number:' >&2
+    echo "$OUTPUT" >&2
+    read -r INDEX
+  fi
+else
+  INDEX=$1
+fi
+
+echo 'Starting safaridriver on 127.0.0.1:4444 ...' >&2
+"$BIN" -p 4444 & pid=$!
+
+# shellcheck disable=SC2064
+trap "kill $pid; exit" INT TERM
+
+echo 'Starting mjpeg-server on 127.0.0.1:9000 ...' >&2
+mjpeg-server -a 127.0.0.1:9000 -- ffmpeg \
+  -loglevel error \
+  -probesize 32 \
+  -fpsprobesize 0 \
+  -analyzeduration 0 \
+  -fflags nobuffer \
+  -f avfoundation \
+  -capture_cursor 1 \
+  -r "${FPS:-15}" \
+  -pixel_format yuyv422 \
+  -i "${INDEX:-$SCREEN}" \
+  -f mpjpeg \
+  -q "${QUALITY:-2}" \
+  -

vendor/blueimp/jquery-file-upload/wdio/conf/chrome.js

@@ -0,0 +1,40 @@
+'use strict'
+
+/* eslint-disable jsdoc/valid-types */
+/** @type WebdriverIO.Config */
+const config = {
+  hostname: 'chromedriver',
+  path: '/',
+  capabilities: [
+    {
+      // Set maxInstances to 1 if screen recordings are enabled:
+      // maxInstances: 1,
+      browserName: 'chrome',
+      'goog:chromeOptions': {
+        // Disable headless mode if screen recordings are enabled:
+        args: ['--headless', '--window-size=1440,900']
+      }
+    }
+  ],
+  logLevel: 'warn',
+  reporters: ['spec'],
+  framework: 'mocha',
+  mochaOpts: {
+    timeout: 60000
+  },
+  specs: ['test/specs/**/*.js'],
+  maximizeWindow: true,
+  screenshots: {
+    saveOnFail: true
+  },
+  videos: {
+    enabled: false,
+    resolution: '1440x900',
+    startDelay: 500,
+    stopDelay: 500
+  },
+  assetsDir: '/home/webdriver/assets/',
+  baseUrl: 'http://example'
+}
+
+exports.config = Object.assign({}, require('../hooks'), config)

vendor/blueimp/jquery-file-upload/wdio/conf/edge.js

@@ -0,0 +1,23 @@
+'use strict'
+
+/* eslint-disable jsdoc/valid-types */
+/** @type WebdriverIO.Config */
+const config = {
+  hostname: process.env.WINDOWS_HOST || 'host.docker.internal',
+  capabilities: [
+    {
+      // Set maxInstances to 1 if screen recordings are enabled:
+      // maxInstances: 1,
+      browserName: 'MicrosoftEdge'
+    }
+  ],
+  videos: {
+    enabled: false,
+    inputFormat: 'mjpeg',
+    startDelay: 500,
+    stopDelay: 500
+  },
+  assetsDir: process.env.WINDOWS_ASSETS_DIR || process.env.MACOS_ASSETS_DIR
+}
+
+exports.config = Object.assign({}, require('./chrome').config, config)

vendor/blueimp/jquery-file-upload/wdio/conf/firefox.js

@@ -0,0 +1,25 @@
+'use strict'
+
+/* eslint-disable jsdoc/valid-types */
+/** @type WebdriverIO.Config */
+const config = {
+  hostname: 'geckodriver',
+  capabilities: [
+    {
+      // geckodriver supports no parallel sessions:
+      maxInstances: 1,
+      browserName: 'firefox',
+      'moz:firefoxOptions': {
+        //args: ['-headless', '--window-size=1440,900']
+      }
+    }
+  ],
+  videos: {
+    enabled: true,
+    resolution: '1440x900',
+    startDelay: 500,
+    stopDelay: 500
+  }
+}
+
+exports.config = Object.assign({}, require('./chrome').config, config)

vendor/blueimp/jquery-file-upload/wdio/conf/internet-explorer.js

@@ -0,0 +1,24 @@
+'use strict'
+
+/* eslint-disable jsdoc/valid-types */
+/** @type WebdriverIO.Config */
+const config = {
+  hostname: process.env.WINDOWS_HOST || 'host.docker.internal',
+  port: 4445,
+  capabilities: [
+    {
+      // IEDriverServer supports no parallel sessions:
+      maxInstances: 1,
+      browserName: 'internet explorer'
+    }
+  ],
+  videos: {
+    enabled: true,
+    inputFormat: 'mjpeg',
+    startDelay: 500,
+    stopDelay: 500
+  },
+  assetsDir: process.env.WINDOWS_ASSETS_DIR
+}
+
+exports.config = Object.assign({}, require('./chrome').config, config)

vendor/blueimp/jquery-file-upload/wdio/conf/safari.js

@@ -0,0 +1,24 @@
+'use strict'
+
+/* eslint-disable jsdoc/valid-types */
+/** @type WebdriverIO.Config */
+const config = {
+  // Docker for Mac host address:
+  hostname: 'host.docker.internal',
+  capabilities: [
+    {
+      // safaridriver supports no parallel sessions:
+      maxInstances: 1,
+      browserName: 'safari'
+    }
+  ],
+  videos: {
+    enabled: true,
+    inputFormat: 'mjpeg',
+    startDelay: 500,
+    stopDelay: 500
+  },
+  assetsDir: process.env.MACOS_ASSETS_DIR
+}
+
+exports.config = Object.assign({}, require('./chrome').config, config)

vendor/blueimp/jquery-file-upload/wdio/hooks/index.js

@@ -0,0 +1,26 @@
+'use strict'
+
+/* global browser, Promise */
+
+const cmds = require('wdio-screen-commands')
+
+/* eslint-disable jsdoc/valid-types */
+/** @type WebdriverIO.HookFunctions */
+const config = {
+  before: async () => {
+    browser.addCommand('saveScreenshotByName', cmds.saveScreenshotByName)
+    browser.addCommand('saveAndDiffScreenshot', cmds.saveAndDiffScreenshot)
+    if (browser.config.maximizeWindow) await browser.maximizeWindow()
+  },
+  beforeTest: async test => {
+    await cmds.startScreenRecording(test)
+  },
+  afterTest: async (test, context, result) => {
+    await Promise.all([
+      cmds.stopScreenRecording(test, result),
+      cmds.saveScreenshotByTest(test, result)
+    ])
+  }
+}
+
+module.exports = config

vendor/blueimp/jquery-file-upload/wdio/test/pages/file-upload.js

@@ -0,0 +1,74 @@
+'use strict'
+
+/* global browser, $, $$ */
+/* eslint-disable class-methods-use-this */
+
+class FileUpload {
+  get fileinput() {
+    return $('.fileinput-button input')
+  }
+  get start() {
+    return $('.fileupload-buttonbar .start')
+  }
+  get toggle() {
+    return $('.fileupload-buttonbar .toggle')
+  }
+  get remove() {
+    return $('.fileupload-buttonbar .delete')
+  }
+  get processing() {
+    return $$('.files .processing')
+  }
+  get uploads() {
+    return $$('.files .template-upload')
+  }
+  get downloads() {
+    return $$('.files .template-download')
+  }
+  get checked() {
+    return $$('.files .toggle:checked')
+  }
+  /**
+   * Opens the file upload form.
+   *
+   * @param {number} [timeout] Wait timeout
+   * @returns {FileUpload} FileUpload object
+   */
+  open(timeout) {
+    browser.url('/')
+    this.fileinput.waitForExist({ timeout })
+    return this
+  }
+  /**
+   * Uploads files.
+   *
+   * @param {Array<string>} files Files to upload
+   * @param {number} [timeout] Wait timeout
+   * @returns {FileUpload} FileUpload object
+   */
+  upload(files, timeout) {
+    this.fileinput.addValue(files.join('\n'))
+    browser.waitUntil(() => !this.processing.length, { timeout })
+    this.start.click()
+    browser.waitUntil(() => !!this.downloads.length, { timeout })
+    browser.waitUntil(() => !this.uploads.length, { timeout })
+    return this
+  }
+  /**
+   * Deletes uploaded files.
+   *
+   * @param {number} [timeout] Wait timeout
+   * @returns {FileUpload} FileUpload object
+   */
+  delete(timeout) {
+    this.toggle.click()
+    browser.waitUntil(() => this.downloads.length === this.checked.length, {
+      timeout
+    })
+    this.remove.click()
+    browser.waitUntil(() => !this.downloads.length, { timeout })
+    return this
+  }
+}
+
+module.exports = new FileUpload()

vendor/blueimp/jquery-file-upload/wdio/test/specs/01-file-upload.js

@@ -0,0 +1,23 @@
+'use strict'
+
+/* global browser, describe, it */
+
+const FileUpload = require('../pages/file-upload')
+const assetsDir = browser.config.assetsDir
+
+describe('File Upload', () => {
+  if (!assetsDir) return
+
+  it('uploads files', () => {
+    FileUpload.open().upload([
+      assetsDir + 'black+white-60x40.gif',
+      assetsDir + 'black+white-3x2.jpg'
+    ])
+    browser.saveAndDiffScreenshot('Files uploaded')
+  })
+
+  it('deletes files', () => {
+    FileUpload.open().delete()
+    browser.saveAndDiffScreenshot('Files deleted')
+  })
+})

vendor/blueimp/jquery-file-upload/wdio/wdio.conf.js

@@ -0,0 +1,4 @@
+'use strict'
+
+// Default to the Chrome config:
+exports.config = require('./conf/chrome').config

vendor/brick/math/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-present Benjamin Morel
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/brick/math/SECURITY.md

@@ -0,0 +1,16 @@
+# Security Policy
+
+## Supported Versions
+
+Only the latest release stream is supported.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 0.8.x   | :white_check_mark: |
+| < 0.8   | :x:                |
+
+## Reporting a Vulnerability
+
+To report a security vulnerability, please use the
+[Tidelift security contact](https://tidelift.com/security).
+Tidelift will coordinate the fix and disclosure.

vendor/brick/math/psalm-baseline.xml

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<files psalm-version="3.8.5@e6ec5fa22a7b9e61670a24d07b3119aff80dcd89">
+  <file src="src/Internal/Calculator/BcMathCalculator.php">
+    <InvalidNullableReturnType occurrences="3">
+      <code>string</code>
+      <code>string</code>
+      <code>string</code>
+    </InvalidNullableReturnType>
+    <InvalidReturnStatement occurrences="1">
+      <code>[$q, $r]</code>
+    </InvalidReturnStatement>
+    <InvalidReturnType occurrences="1">
+      <code>array</code>
+    </InvalidReturnType>
+    <NullableReturnStatement occurrences="3">
+      <code>\bcdiv($a, $b, 0)</code>
+      <code>\bcmod($a, $b)</code>
+      <code>\bcpowmod($base, $exp, $mod, 0)</code>
+    </NullableReturnStatement>
+  </file>
+  <file src="src/Internal/Calculator/NativeCalculator.php">
+    <InvalidOperand occurrences="6">
+      <code>$a</code>
+      <code>$a</code>
+      <code>$a</code>
+      <code>$b</code>
+      <code>$blockA</code>
+      <code>$blockA</code>
+    </InvalidOperand>
+    <LoopInvalidation occurrences="4">
+      <code>$i</code>
+      <code>$i</code>
+      <code>$i</code>
+      <code>$j</code>
+    </LoopInvalidation>
+    <PossiblyInvalidArgument occurrences="1">
+      <code>$e / 2</code>
+    </PossiblyInvalidArgument>
+  </file>
+</files>

vendor/brick/math/psalm.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0"?>
+<psalm
+    totallyTyped="false"
+    resolveFromConfigFile="true"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xmlns="https://getpsalm.org/schema/config"
+    xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    errorBaseline="psalm-baseline.xml"
+>
+    <projectFiles>
+        <directory name="src" />
+        <ignoreFiles>
+            <directory name="vendor" />
+        </ignoreFiles>
+    </projectFiles>
+
+    <issueHandlers>
+        <LessSpecificReturnType errorLevel="info" />
+
+        <!-- level 3 issues - slightly lazy code writing, but provably low false-negatives -->
+
+        <DeprecatedMethod errorLevel="info" />
+        <DeprecatedProperty errorLevel="info" />
+        <DeprecatedClass errorLevel="info" />
+        <DeprecatedConstant errorLevel="info" />
+        <DeprecatedFunction errorLevel="info" />
+        <DeprecatedInterface errorLevel="info" />
+        <DeprecatedTrait errorLevel="info" />
+
+        <InternalMethod errorLevel="info" />
+        <InternalProperty errorLevel="info" />
+        <InternalClass errorLevel="info" />
+
+        <MissingClosureReturnType errorLevel="info" />
+        <MissingReturnType errorLevel="info" />
+        <MissingPropertyType errorLevel="info" />
+        <InvalidDocblock errorLevel="info" />
+        <MisplacedRequiredParam errorLevel="info" />
+
+        <PropertyNotSetInConstructor errorLevel="info" />
+        <MissingConstructor errorLevel="info" />
+        <MissingClosureParamType errorLevel="info" />
+        <MissingParamType errorLevel="info" />
+
+        <RedundantCondition errorLevel="info" />
+
+        <DocblockTypeContradiction errorLevel="info" />
+        <RedundantConditionGivenDocblockType errorLevel="info" />
+
+        <UnresolvableInclude errorLevel="info" />
+
+        <RawObjectIteration errorLevel="info" />
+
+        <InvalidStringClass errorLevel="info" />
+    </issueHandlers>
+</psalm>

vendor/brick/math/src/BigDecimal.php

@@ -0,0 +1,855 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math;
+
+use Brick\Math\Exception\DivisionByZeroException;
+use Brick\Math\Exception\MathException;
+use Brick\Math\Exception\NegativeNumberException;
+use Brick\Math\Internal\Calculator;
+
+/**
+ * Immutable, arbitrary-precision signed decimal numbers.
+ *
+ * @psalm-immutable
+ */
+final class BigDecimal extends BigNumber
+{
+    /**
+     * The unscaled value of this decimal number.
+     *
+     * This is a string of digits with an optional leading minus sign.
+     * No leading zero must be present.
+     * No leading minus sign must be present if the value is 0.
+     *
+     * @var string
+     */
+    private $value;
+
+    /**
+     * The scale (number of digits after the decimal point) of this decimal number.
+     *
+     * This must be zero or more.
+     *
+     * @var int
+     */
+    private $scale;
+
+    /**
+     * Protected constructor. Use a factory method to obtain an instance.
+     *
+     * @param string $value The unscaled value, validated.
+     * @param int    $scale The scale, validated.
+     */
+    protected function __construct(string $value, int $scale = 0)
+    {
+        $this->value = $value;
+        $this->scale = $scale;
+    }
+
+    /**
+     * Creates a BigDecimal of the given value.
+     *
+     * @param BigNumber|int|float|string $value
+     *
+     * @return BigDecimal
+     *
+     * @throws MathException If the value cannot be converted to a BigDecimal.
+     *
+     * @psalm-pure
+     */
+    public static function of($value) : BigNumber
+    {
+        return parent::of($value)->toBigDecimal();
+    }
+
+    /**
+     * Creates a BigDecimal from an unscaled value and a scale.
+     *
+     * Example: `(12345, 3)` will result in the BigDecimal `12.345`.
+     *
+     * @param BigNumber|int|float|string $value The unscaled value. Must be convertible to a BigInteger.
+     * @param int                        $scale The scale of the number, positive or zero.
+     *
+     * @return BigDecimal
+     *
+     * @throws \InvalidArgumentException If the scale is negative.
+     *
+     * @psalm-pure
+     */
+    public static function ofUnscaledValue($value, int $scale = 0) : BigDecimal
+    {
+        if ($scale < 0) {
+            throw new \InvalidArgumentException('The scale cannot be negative.');
+        }
+
+        return new BigDecimal((string) BigInteger::of($value), $scale);
+    }
+
+    /**
+     * Returns a BigDecimal representing zero, with a scale of zero.
+     *
+     * @return BigDecimal
+     *
+     * @psalm-pure
+     */
+    public static function zero() : BigDecimal
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $zero;
+
+        if ($zero === null) {
+            $zero = new BigDecimal('0');
+        }
+
+        return $zero;
+    }
+
+    /**
+     * Returns a BigDecimal representing one, with a scale of zero.
+     *
+     * @return BigDecimal
+     *
+     * @psalm-pure
+     */
+    public static function one() : BigDecimal
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $one;
+
+        if ($one === null) {
+            $one = new BigDecimal('1');
+        }
+
+        return $one;
+    }
+
+    /**
+     * Returns a BigDecimal representing ten, with a scale of zero.
+     *
+     * @return BigDecimal
+     *
+     * @psalm-pure
+     */
+    public static function ten() : BigDecimal
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $ten;
+
+        if ($ten === null) {
+            $ten = new BigDecimal('10');
+        }
+
+        return $ten;
+    }
+
+    /**
+     * Returns the sum of this number and the given one.
+     *
+     * The result has a scale of `max($this->scale, $that->scale)`.
+     *
+     * @param BigNumber|int|float|string $that The number to add. Must be convertible to a BigDecimal.
+     *
+     * @return BigDecimal The result.
+     *
+     * @throws MathException If the number is not valid, or is not convertible to a BigDecimal.
+     */
+    public function plus($that) : BigDecimal
+    {
+        $that = BigDecimal::of($that);
+
+        if ($that->value === '0' && $that->scale <= $this->scale) {
+            return $this;
+        }
+
+        if ($this->value === '0' && $this->scale <= $that->scale) {
+            return $that;
+        }
+
+        [$a, $b] = $this->scaleValues($this, $that);
+
+        $value = Calculator::get()->add($a, $b);
+        $scale = $this->scale > $that->scale ? $this->scale : $that->scale;
+
+        return new BigDecimal($value, $scale);
+    }
+
+    /**
+     * Returns the difference of this number and the given one.
+     *
+     * The result has a scale of `max($this->scale, $that->scale)`.
+     *
+     * @param BigNumber|int|float|string $that The number to subtract. Must be convertible to a BigDecimal.
+     *
+     * @return BigDecimal The result.
+     *
+     * @throws MathException If the number is not valid, or is not convertible to a BigDecimal.
+     */
+    public function minus($that) : BigDecimal
+    {
+        $that = BigDecimal::of($that);
+
+        if ($that->value === '0' && $that->scale <= $this->scale) {
+            return $this;
+        }
+
+        [$a, $b] = $this->scaleValues($this, $that);
+
+        $value = Calculator::get()->sub($a, $b);
+        $scale = $this->scale > $that->scale ? $this->scale : $that->scale;
+
+        return new BigDecimal($value, $scale);
+    }
+
+    /**
+     * Returns the product of this number and the given one.
+     *
+     * The result has a scale of `$this->scale + $that->scale`.
+     *
+     * @param BigNumber|int|float|string $that The multiplier. Must be convertible to a BigDecimal.
+     *
+     * @return BigDecimal The result.
+     *
+     * @throws MathException If the multiplier is not a valid number, or is not convertible to a BigDecimal.
+     */
+    public function multipliedBy($that) : BigDecimal
+    {
+        $that = BigDecimal::of($that);
+
+        if ($that->value === '1' && $that->scale === 0) {
+            return $this;
+        }
+
+        if ($this->value === '1' && $this->scale === 0) {
+            return $that;
+        }
+
+        $value = Calculator::get()->mul($this->value, $that->value);
+        $scale = $this->scale + $that->scale;
+
+        return new BigDecimal($value, $scale);
+    }
+
+    /**
+     * Returns the result of the division of this number by the given one, at the given scale.
+     *
+     * @param BigNumber|int|float|string $that         The divisor.
+     * @param int|null                   $scale        The desired scale, or null to use the scale of this number.
+     * @param int                        $roundingMode An optional rounding mode.
+     *
+     * @return BigDecimal
+     *
+     * @throws \InvalidArgumentException If the scale or rounding mode is invalid.
+     * @throws MathException             If the number is invalid, is zero, or rounding was necessary.
+     */
+    public function dividedBy($that, ?int $scale = null, int $roundingMode = RoundingMode::UNNECESSARY) : BigDecimal
+    {
+        $that = BigDecimal::of($that);
+
+        if ($that->isZero()) {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        if ($scale === null) {
+            $scale = $this->scale;
+        } elseif ($scale < 0) {
+            throw new \InvalidArgumentException('Scale cannot be negative.');
+        }
+
+        if ($that->value === '1' && $that->scale === 0 && $scale === $this->scale) {
+            return $this;
+        }
+
+        $p = $this->valueWithMinScale($that->scale + $scale);
+        $q = $that->valueWithMinScale($this->scale - $scale);
+
+        $result = Calculator::get()->divRound($p, $q, $roundingMode);
+
+        return new BigDecimal($result, $scale);
+    }
+
+    /**
+     * Returns the exact result of the division of this number by the given one.
+     *
+     * The scale of the result is automatically calculated to fit all the fraction digits.
+     *
+     * @param BigNumber|int|float|string $that The divisor. Must be convertible to a BigDecimal.
+     *
+     * @return BigDecimal The result.
+     *
+     * @throws MathException If the divisor is not a valid number, is not convertible to a BigDecimal, is zero,
+     *                       or the result yields an infinite number of digits.
+     */
+    public function exactlyDividedBy($that) : BigDecimal
+    {
+        $that = BigDecimal::of($that);
+
+        if ($that->value === '0') {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        [$a, $b] = $this->scaleValues($this, $that);
+
+        $d = \rtrim($b, '0');
+        $scale = \strlen($b) - \strlen($d);
+
+        $calculator = Calculator::get();
+
+        foreach ([5, 2] as $prime) {
+            for (;;) {
+                $lastDigit = (int) $d[-1];
+
+                if ($lastDigit % $prime !== 0) {
+                    break;
+                }
+
+                $d = $calculator->divQ($d, (string) $prime);
+                $scale++;
+            }
+        }
+
+        return $this->dividedBy($that, $scale)->stripTrailingZeros();
+    }
+
+    /**
+     * Returns this number exponentiated to the given value.
+     *
+     * The result has a scale of `$this->scale * $exponent`.
+     *
+     * @param int $exponent The exponent.
+     *
+     * @return BigDecimal The result.
+     *
+     * @throws \InvalidArgumentException If the exponent is not in the range 0 to 1,000,000.
+     */
+    public function power(int $exponent) : BigDecimal
+    {
+        if ($exponent === 0) {
+            return BigDecimal::one();
+        }
+
+        if ($exponent === 1) {
+            return $this;
+        }
+
+        if ($exponent < 0 || $exponent > Calculator::MAX_POWER) {
+            throw new \InvalidArgumentException(\sprintf(
+                'The exponent %d is not in the range 0 to %d.',
+                $exponent,
+                Calculator::MAX_POWER
+            ));
+        }
+
+        return new BigDecimal(Calculator::get()->pow($this->value, $exponent), $this->scale * $exponent);
+    }
+
+    /**
+     * Returns the quotient of the division of this number by this given one.
+     *
+     * The quotient has a scale of `0`.
+     *
+     * @param BigNumber|int|float|string $that The divisor. Must be convertible to a BigDecimal.
+     *
+     * @return BigDecimal The quotient.
+     *
+     * @throws MathException If the divisor is not a valid decimal number, or is zero.
+     */
+    public function quotient($that) : BigDecimal
+    {
+        $that = BigDecimal::of($that);
+
+        if ($that->isZero()) {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        $p = $this->valueWithMinScale($that->scale);
+        $q = $that->valueWithMinScale($this->scale);
+
+        $quotient = Calculator::get()->divQ($p, $q);
+
+        return new BigDecimal($quotient, 0);
+    }
+
+    /**
+     * Returns the remainder of the division of this number by this given one.
+     *
+     * The remainder has a scale of `max($this->scale, $that->scale)`.
+     *
+     * @param BigNumber|int|float|string $that The divisor. Must be convertible to a BigDecimal.
+     *
+     * @return BigDecimal The remainder.
+     *
+     * @throws MathException If the divisor is not a valid decimal number, or is zero.
+     */
+    public function remainder($that) : BigDecimal
+    {
+        $that = BigDecimal::of($that);
+
+        if ($that->isZero()) {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        $p = $this->valueWithMinScale($that->scale);
+        $q = $that->valueWithMinScale($this->scale);
+
+        $remainder = Calculator::get()->divR($p, $q);
+
+        $scale = $this->scale > $that->scale ? $this->scale : $that->scale;
+
+        return new BigDecimal($remainder, $scale);
+    }
+
+    /**
+     * Returns the quotient and remainder of the division of this number by the given one.
+     *
+     * The quotient has a scale of `0`, and the remainder has a scale of `max($this->scale, $that->scale)`.
+     *
+     * @param BigNumber|int|float|string $that The divisor. Must be convertible to a BigDecimal.
+     *
+     * @return BigDecimal[] An array containing the quotient and the remainder.
+     *
+     * @throws MathException If the divisor is not a valid decimal number, or is zero.
+     */
+    public function quotientAndRemainder($that) : array
+    {
+        $that = BigDecimal::of($that);
+
+        if ($that->isZero()) {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        $p = $this->valueWithMinScale($that->scale);
+        $q = $that->valueWithMinScale($this->scale);
+
+        [$quotient, $remainder] = Calculator::get()->divQR($p, $q);
+
+        $scale = $this->scale > $that->scale ? $this->scale : $that->scale;
+
+        $quotient = new BigDecimal($quotient, 0);
+        $remainder = new BigDecimal($remainder, $scale);
+
+        return [$quotient, $remainder];
+    }
+
+    /**
+     * Returns the square root of this number, rounded down to the given number of decimals.
+     *
+     * @param int $scale
+     *
+     * @return BigDecimal
+     *
+     * @throws \InvalidArgumentException If the scale is negative.
+     * @throws NegativeNumberException If this number is negative.
+     */
+    public function sqrt(int $scale) : BigDecimal
+    {
+        if ($scale < 0) {
+            throw new \InvalidArgumentException('Scale cannot be negative.');
+        }
+
+        if ($this->value === '0') {
+            return new BigDecimal('0', $scale);
+        }
+
+        if ($this->value[0] === '-') {
+            throw new NegativeNumberException('Cannot calculate the square root of a negative number.');
+        }
+
+        $value = $this->value;
+        $addDigits = 2 * $scale - $this->scale;
+
+        if ($addDigits > 0) {
+            // add zeros
+            $value .= \str_repeat('0', $addDigits);
+        } elseif ($addDigits < 0) {
+            // trim digits
+            if (-$addDigits >= \strlen($this->value)) {
+                // requesting a scale too low, will always yield a zero result
+                return new BigDecimal('0', $scale);
+            }
+
+            $value = \substr($value, 0, $addDigits);
+        }
+
+        $value = Calculator::get()->sqrt($value);
+
+        return new BigDecimal($value, $scale);
+    }
+
+    /**
+     * Returns a copy of this BigDecimal with the decimal point moved $n places to the left.
+     *
+     * @param int $n
+     *
+     * @return BigDecimal
+     */
+    public function withPointMovedLeft(int $n) : BigDecimal
+    {
+        if ($n === 0) {
+            return $this;
+        }
+
+        if ($n < 0) {
+            return $this->withPointMovedRight(-$n);
+        }
+
+        return new BigDecimal($this->value, $this->scale + $n);
+    }
+
+    /**
+     * Returns a copy of this BigDecimal with the decimal point moved $n places to the right.
+     *
+     * @param int $n
+     *
+     * @return BigDecimal
+     */
+    public function withPointMovedRight(int $n) : BigDecimal
+    {
+        if ($n === 0) {
+            return $this;
+        }
+
+        if ($n < 0) {
+            return $this->withPointMovedLeft(-$n);
+        }
+
+        $value = $this->value;
+        $scale = $this->scale - $n;
+
+        if ($scale < 0) {
+            if ($value !== '0') {
+                $value .= \str_repeat('0', -$scale);
+            }
+            $scale = 0;
+        }
+
+        return new BigDecimal($value, $scale);
+    }
+
+    /**
+     * Returns a copy of this BigDecimal with any trailing zeros removed from the fractional part.
+     *
+     * @return BigDecimal
+     */
+    public function stripTrailingZeros() : BigDecimal
+    {
+        if ($this->scale === 0) {
+            return $this;
+        }
+
+        $trimmedValue = \rtrim($this->value, '0');
+
+        if ($trimmedValue === '') {
+            return BigDecimal::zero();
+        }
+
+        $trimmableZeros = \strlen($this->value) - \strlen($trimmedValue);
+
+        if ($trimmableZeros === 0) {
+            return $this;
+        }
+
+        if ($trimmableZeros > $this->scale) {
+            $trimmableZeros = $this->scale;
+        }
+
+        $value = \substr($this->value, 0, -$trimmableZeros);
+        $scale = $this->scale - $trimmableZeros;
+
+        return new BigDecimal($value, $scale);
+    }
+
+    /**
+     * Returns the absolute value of this number.
+     *
+     * @return BigDecimal
+     */
+    public function abs() : BigDecimal
+    {
+        return $this->isNegative() ? $this->negated() : $this;
+    }
+
+    /**
+     * Returns the negated value of this number.
+     *
+     * @return BigDecimal
+     */
+    public function negated() : BigDecimal
+    {
+        return new BigDecimal(Calculator::get()->neg($this->value), $this->scale);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function compareTo($that) : int
+    {
+        $that = BigNumber::of($that);
+
+        if ($that instanceof BigInteger) {
+            $that = $that->toBigDecimal();
+        }
+
+        if ($that instanceof BigDecimal) {
+            [$a, $b] = $this->scaleValues($this, $that);
+
+            return Calculator::get()->cmp($a, $b);
+        }
+
+        return - $that->compareTo($this);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSign() : int
+    {
+        return ($this->value === '0') ? 0 : (($this->value[0] === '-') ? -1 : 1);
+    }
+
+    /**
+     * @return BigInteger
+     */
+    public function getUnscaledValue() : BigInteger
+    {
+        return BigInteger::create($this->value);
+    }
+
+    /**
+     * @return int
+     */
+    public function getScale() : int
+    {
+        return $this->scale;
+    }
+
+    /**
+     * Returns a string representing the integral part of this decimal number.
+     *
+     * Example: `-123.456` => `-123`.
+     *
+     * @return string
+     */
+    public function getIntegralPart() : string
+    {
+        if ($this->scale === 0) {
+            return $this->value;
+        }
+
+        $value = $this->getUnscaledValueWithLeadingZeros();
+
+        return \substr($value, 0, -$this->scale);
+    }
+
+    /**
+     * Returns a string representing the fractional part of this decimal number.
+     *
+     * If the scale is zero, an empty string is returned.
+     *
+     * Examples: `-123.456` => '456', `123` => ''.
+     *
+     * @return string
+     */
+    public function getFractionalPart() : string
+    {
+        if ($this->scale === 0) {
+            return '';
+        }
+
+        $value = $this->getUnscaledValueWithLeadingZeros();
+
+        return \substr($value, -$this->scale);
+    }
+
+    /**
+     * Returns whether this decimal number has a non-zero fractional part.
+     *
+     * @return bool
+     */
+    public function hasNonZeroFractionalPart() : bool
+    {
+        return $this->getFractionalPart() !== \str_repeat('0', $this->scale);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigInteger() : BigInteger
+    {
+        if ($this->scale === 0) {
+            $zeroScaleDecimal = $this;
+        } else {
+            $zeroScaleDecimal = $this->dividedBy(1, 0);
+        }
+
+        return BigInteger::create($zeroScaleDecimal->value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigDecimal() : BigDecimal
+    {
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigRational() : BigRational
+    {
+        $numerator = BigInteger::create($this->value);
+        $denominator = BigInteger::create('1' . \str_repeat('0', $this->scale));
+
+        return BigRational::create($numerator, $denominator, false);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toScale(int $scale, int $roundingMode = RoundingMode::UNNECESSARY) : BigDecimal
+    {
+        if ($scale === $this->scale) {
+            return $this;
+        }
+
+        return $this->dividedBy(BigDecimal::one(), $scale, $roundingMode);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toInt() : int
+    {
+        return $this->toBigInteger()->toInt();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toFloat() : float
+    {
+        return (float) (string) $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString() : string
+    {
+        if ($this->scale === 0) {
+            return $this->value;
+        }
+
+        $value = $this->getUnscaledValueWithLeadingZeros();
+
+        return \substr($value, 0, -$this->scale) . '.' . \substr($value, -$this->scale);
+    }
+
+    /**
+     * This method is required by interface Serializable and SHOULD NOT be accessed directly.
+     *
+     * @internal
+     *
+     * @return string
+     */
+    public function serialize() : string
+    {
+        return $this->value . ':' . $this->scale;
+    }
+
+    /**
+     * This method is only here to implement interface Serializable and cannot be accessed directly.
+     *
+     * @internal
+     *
+     * @param string $value
+     *
+     * @return void
+     *
+     * @throws \LogicException
+     */
+    public function unserialize($value) : void
+    {
+        if (isset($this->value)) {
+            throw new \LogicException('unserialize() is an internal function, it must not be called directly.');
+        }
+
+        [$value, $scale] = \explode(':', $value);
+
+        $this->value = $value;
+        $this->scale = (int) $scale;
+    }
+
+    /**
+     * Puts the internal values of the given decimal numbers on the same scale.
+     *
+     * @param BigDecimal $x The first decimal number.
+     * @param BigDecimal $y The second decimal number.
+     *
+     * @return array{0: string, 1: string} The scaled integer values of $x and $y.
+     */
+    private function scaleValues(BigDecimal $x, BigDecimal $y) : array
+    {
+        $a = $x->value;
+        $b = $y->value;
+
+        if ($b !== '0' && $x->scale > $y->scale) {
+            $b .= \str_repeat('0', $x->scale - $y->scale);
+        } elseif ($a !== '0' && $x->scale < $y->scale) {
+            $a .= \str_repeat('0', $y->scale - $x->scale);
+        }
+
+        return [$a, $b];
+    }
+
+    /**
+     * @param int $scale
+     *
+     * @return string
+     */
+    private function valueWithMinScale(int $scale) : string
+    {
+        $value = $this->value;
+
+        if ($this->value !== '0' && $scale > $this->scale) {
+            $value .= \str_repeat('0', $scale - $this->scale);
+        }
+
+        return $value;
+    }
+
+    /**
+     * Adds leading zeros if necessary to the unscaled value to represent the full decimal number.
+     *
+     * @return string
+     */
+    private function getUnscaledValueWithLeadingZeros() : string
+    {
+        $value = $this->value;
+        $targetLength = $this->scale + 1;
+        $negative = ($value[0] === '-');
+        $length = \strlen($value);
+
+        if ($negative) {
+            $length--;
+        }
+
+        if ($length >= $targetLength) {
+            return $this->value;
+        }
+
+        if ($negative) {
+            $value = \substr($value, 1);
+        }
+
+        $value = \str_pad($value, $targetLength, '0', STR_PAD_LEFT);
+
+        if ($negative) {
+            $value = '-' . $value;
+        }
+
+        return $value;
+    }
+}

vendor/brick/math/src/BigInteger.php

@@ -0,0 +1,900 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math;
+
+use Brick\Math\Exception\DivisionByZeroException;
+use Brick\Math\Exception\IntegerOverflowException;
+use Brick\Math\Exception\MathException;
+use Brick\Math\Exception\NegativeNumberException;
+use Brick\Math\Exception\NumberFormatException;
+use Brick\Math\Internal\Calculator;
+
+/**
+ * An arbitrary-size integer.
+ *
+ * All methods accepting a number as a parameter accept either a BigInteger instance,
+ * an integer, or a string representing an arbitrary size integer.
+ *
+ * @psalm-immutable
+ */
+final class BigInteger extends BigNumber
+{
+    /**
+     * The value, as a string of digits with optional leading minus sign.
+     *
+     * No leading zeros must be present.
+     * No leading minus sign must be present if the number is zero.
+     *
+     * @var string
+     */
+    private $value;
+
+    /**
+     * Protected constructor. Use a factory method to obtain an instance.
+     *
+     * @param string $value A string of digits, with optional leading minus sign.
+     */
+    protected function __construct(string $value)
+    {
+        $this->value = $value;
+    }
+
+    /**
+     * Creates a BigInteger of the given value.
+     *
+     * @param BigNumber|int|float|string $value
+     *
+     * @return BigInteger
+     *
+     * @throws MathException If the value cannot be converted to a BigInteger.
+     *
+     * @psalm-pure
+     */
+    public static function of($value) : BigNumber
+    {
+        return parent::of($value)->toBigInteger();
+    }
+
+    /**
+     * Creates a number from a string in a given base.
+     *
+     * The string can optionally be prefixed with the `+` or `-` sign.
+     *
+     * Bases greater than 36 are not supported by this method, as there is no clear consensus on which of the lowercase
+     * or uppercase characters should come first. Instead, this method accepts any base up to 36, and does not
+     * differentiate lowercase and uppercase characters, which are considered equal.
+     *
+     * For bases greater than 36, and/or custom alphabets, use the fromArbitraryBase() method.
+     *
+     * @param string $number The number to convert, in the given base.
+     * @param int    $base   The base of the number, between 2 and 36.
+     *
+     * @return BigInteger
+     *
+     * @throws NumberFormatException     If the number is empty, or contains invalid chars for the given base.
+     * @throws \InvalidArgumentException If the base is out of range.
+     *
+     * @psalm-pure
+     */
+    public static function fromBase(string $number, int $base) : BigInteger
+    {
+        if ($number === '') {
+            throw new NumberFormatException('The number cannot be empty.');
+        }
+
+        if ($base < 2 || $base > 36) {
+            throw new \InvalidArgumentException(\sprintf('Base %d is not in range 2 to 36.', $base));
+        }
+
+        if ($number[0] === '-') {
+            $sign = '-';
+            $number = \substr($number, 1);
+        } elseif ($number[0] === '+') {
+            $sign = '';
+            $number = \substr($number, 1);
+        } else {
+            $sign = '';
+        }
+
+        if ($number === '') {
+            throw new NumberFormatException('The number cannot be empty.');
+        }
+
+        $number = \ltrim($number, '0');
+
+        if ($number === '') {
+            // The result will be the same in any base, avoid further calculation.
+            return BigInteger::zero();
+        }
+
+        if ($number === '1') {
+            // The result will be the same in any base, avoid further calculation.
+            return new BigInteger($sign . '1');
+        }
+
+        $pattern = '/[^' . \substr(Calculator::ALPHABET, 0, $base) . ']/';
+
+        if (\preg_match($pattern, \strtolower($number), $matches) === 1) {
+            throw new NumberFormatException(\sprintf('"%s" is not a valid character in base %d.', $matches[0], $base));
+        }
+
+        if ($base === 10) {
+            // The number is usable as is, avoid further calculation.
+            return new BigInteger($sign . $number);
+        }
+
+        $result = Calculator::get()->fromBase($number, $base);
+
+        return new BigInteger($sign . $result);
+    }
+
+    /**
+     * Parses a string containing an integer in an arbitrary base, using a custom alphabet.
+     *
+     * Because this method accepts an alphabet with any character, including dash, it does not handle negative numbers.
+     *
+     * @param string $number   The number to parse.
+     * @param string $alphabet The alphabet, for example '01' for base 2, or '01234567' for base 8.
+     *
+     * @return BigInteger
+     *
+     * @throws NumberFormatException     If the given number is empty or contains invalid chars for the given alphabet.
+     * @throws \InvalidArgumentException If the alphabet does not contain at least 2 chars.
+     *
+     * @psalm-pure
+     */
+    public static function fromArbitraryBase(string $number, string $alphabet) : BigInteger
+    {
+        if ($number === '') {
+            throw new NumberFormatException('The number cannot be empty.');
+        }
+
+        $base = \strlen($alphabet);
+
+        if ($base < 2) {
+            throw new \InvalidArgumentException('The alphabet must contain at least 2 chars.');
+        }
+
+        $pattern = '/[^' . \preg_quote($alphabet, '/') . ']/';
+
+        if (\preg_match($pattern, $number, $matches) === 1) {
+            throw NumberFormatException::charNotInAlphabet($matches[0]);
+        }
+
+        $number = Calculator::get()->fromArbitraryBase($number, $alphabet, $base);
+
+        return new BigInteger($number);
+    }
+
+    /**
+     * Returns a BigInteger representing zero.
+     *
+     * @return BigInteger
+     *
+     * @psalm-pure
+     */
+    public static function zero() : BigInteger
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $zero;
+
+        if ($zero === null) {
+            $zero = new BigInteger('0');
+        }
+
+        return $zero;
+    }
+
+    /**
+     * Returns a BigInteger representing one.
+     *
+     * @return BigInteger
+     *
+     * @psalm-pure
+     */
+    public static function one() : BigInteger
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $one;
+
+        if ($one === null) {
+            $one = new BigInteger('1');
+        }
+
+        return $one;
+    }
+
+    /**
+     * Returns a BigInteger representing ten.
+     *
+     * @return BigInteger
+     *
+     * @psalm-pure
+     */
+    public static function ten() : BigInteger
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $ten;
+
+        if ($ten === null) {
+            $ten = new BigInteger('10');
+        }
+
+        return $ten;
+    }
+
+    /**
+     * Returns the sum of this number and the given one.
+     *
+     * @param BigNumber|int|float|string $that The number to add. Must be convertible to a BigInteger.
+     *
+     * @return BigInteger The result.
+     *
+     * @throws MathException If the number is not valid, or is not convertible to a BigInteger.
+     */
+    public function plus($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '0') {
+            return $this;
+        }
+
+        if ($this->value === '0') {
+            return $that;
+        }
+
+        $value = Calculator::get()->add($this->value, $that->value);
+
+        return new BigInteger($value);
+    }
+
+    /**
+     * Returns the difference of this number and the given one.
+     *
+     * @param BigNumber|int|float|string $that The number to subtract. Must be convertible to a BigInteger.
+     *
+     * @return BigInteger The result.
+     *
+     * @throws MathException If the number is not valid, or is not convertible to a BigInteger.
+     */
+    public function minus($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '0') {
+            return $this;
+        }
+
+        $value = Calculator::get()->sub($this->value, $that->value);
+
+        return new BigInteger($value);
+    }
+
+    /**
+     * Returns the product of this number and the given one.
+     *
+     * @param BigNumber|int|float|string $that The multiplier. Must be convertible to a BigInteger.
+     *
+     * @return BigInteger The result.
+     *
+     * @throws MathException If the multiplier is not a valid number, or is not convertible to a BigInteger.
+     */
+    public function multipliedBy($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '1') {
+            return $this;
+        }
+
+        if ($this->value === '1') {
+            return $that;
+        }
+
+        $value = Calculator::get()->mul($this->value, $that->value);
+
+        return new BigInteger($value);
+    }
+
+    /**
+     * Returns the result of the division of this number by the given one.
+     *
+     * @param BigNumber|int|float|string $that         The divisor. Must be convertible to a BigInteger.
+     * @param int                        $roundingMode An optional rounding mode.
+     *
+     * @return BigInteger The result.
+     *
+     * @throws MathException If the divisor is not a valid number, is not convertible to a BigInteger, is zero,
+     *                       or RoundingMode::UNNECESSARY is used and the remainder is not zero.
+     */
+    public function dividedBy($that, int $roundingMode = RoundingMode::UNNECESSARY) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '1') {
+            return $this;
+        }
+
+        if ($that->value === '0') {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        $result = Calculator::get()->divRound($this->value, $that->value, $roundingMode);
+
+        return new BigInteger($result);
+    }
+
+    /**
+     * Returns this number exponentiated to the given value.
+     *
+     * @param int $exponent The exponent.
+     *
+     * @return BigInteger The result.
+     *
+     * @throws \InvalidArgumentException If the exponent is not in the range 0 to 1,000,000.
+     */
+    public function power(int $exponent) : BigInteger
+    {
+        if ($exponent === 0) {
+            return BigInteger::one();
+        }
+
+        if ($exponent === 1) {
+            return $this;
+        }
+
+        if ($exponent < 0 || $exponent > Calculator::MAX_POWER) {
+            throw new \InvalidArgumentException(\sprintf(
+                'The exponent %d is not in the range 0 to %d.',
+                $exponent,
+                Calculator::MAX_POWER
+            ));
+        }
+
+        return new BigInteger(Calculator::get()->pow($this->value, $exponent));
+    }
+
+    /**
+     * Returns the quotient of the division of this number by the given one.
+     *
+     * @param BigNumber|int|float|string $that The divisor. Must be convertible to a BigInteger.
+     *
+     * @return BigInteger
+     *
+     * @throws DivisionByZeroException If the divisor is zero.
+     */
+    public function quotient($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '1') {
+            return $this;
+        }
+
+        if ($that->value === '0') {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        $quotient = Calculator::get()->divQ($this->value, $that->value);
+
+        return new BigInteger($quotient);
+    }
+
+    /**
+     * Returns the remainder of the division of this number by the given one.
+     *
+     * The remainder, when non-zero, has the same sign as the dividend.
+     *
+     * @param BigNumber|int|float|string $that The divisor. Must be convertible to a BigInteger.
+     *
+     * @return BigInteger
+     *
+     * @throws DivisionByZeroException If the divisor is zero.
+     */
+    public function remainder($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '0') {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        $remainder = Calculator::get()->divR($this->value, $that->value);
+
+        return new BigInteger($remainder);
+    }
+
+    /**
+     * Returns the quotient and remainder of the division of this number by the given one.
+     *
+     * @param BigNumber|int|float|string $that The divisor. Must be convertible to a BigInteger.
+     *
+     * @return BigInteger[] An array containing the quotient and the remainder.
+     *
+     * @throws DivisionByZeroException If the divisor is zero.
+     */
+    public function quotientAndRemainder($that) : array
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '0') {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        [$quotient, $remainder] = Calculator::get()->divQR($this->value, $that->value);
+
+        return [
+            new BigInteger($quotient),
+            new BigInteger($remainder)
+        ];
+    }
+
+    /**
+     * Returns the modulo of this number and the given one.
+     *
+     * The modulo operation yields the same result as the remainder operation when both operands are of the same sign,
+     * and may differ when signs are different.
+     *
+     * The result of the modulo operation, when non-zero, has the same sign as the divisor.
+     *
+     * @param BigNumber|int|float|string $that The divisor. Must be convertible to a BigInteger.
+     *
+     * @return BigInteger
+     *
+     * @throws DivisionByZeroException If the divisor is zero.
+     */
+    public function mod($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '0') {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        return $this->remainder($that)->plus($that)->remainder($that);
+    }
+
+    /**
+     * Returns this number raised into power with modulo.
+     *
+     * This operation only works on positive numbers.
+     *
+     * @param BigNumber|int|float|string $exp The positive exponent.
+     * @param BigNumber|int|float|string $mod The modulo. Must not be zero.
+     *
+     * @return BigInteger
+     *
+     * @throws NegativeNumberException If any of the operands is negative.
+     * @throws DivisionByZeroException If the modulo is zero.
+     */
+    public function powerMod($exp, $mod) : BigInteger
+    {
+        $exp = BigInteger::of($exp);
+        $mod = BigInteger::of($mod);
+
+        if ($this->isNegative() || $exp->isNegative() || $mod->isNegative()) {
+            throw new NegativeNumberException('The operands cannot be negative.');
+        }
+
+        if ($mod->isZero()) {
+            throw DivisionByZeroException::divisionByZero();
+        }
+
+        $result = Calculator::get()->powmod($this->value, $exp->value, $mod->value);
+
+        return new BigInteger($result);
+    }
+
+    /**
+     * Returns the greatest common divisor of this number and the given one.
+     *
+     * The GCD is always positive, unless both operands are zero, in which case it is zero.
+     *
+     * @param BigNumber|int|float|string $that The operand. Must be convertible to an integer number.
+     *
+     * @return BigInteger
+     */
+    public function gcd($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        if ($that->value === '0' && $this->value[0] !== '-') {
+            return $this;
+        }
+
+        if ($this->value === '0' && $that->value[0] !== '-') {
+            return $that;
+        }
+
+        $value = Calculator::get()->gcd($this->value, $that->value);
+
+        return new BigInteger($value);
+    }
+
+    /**
+     * Returns the integer square root number of this number, rounded down.
+     *
+     * The result is the largest x such that x² ≤ n.
+     *
+     * @return BigInteger
+     *
+     * @throws NegativeNumberException If this number is negative.
+     */
+    public function sqrt() : BigInteger
+    {
+        if ($this->value[0] === '-') {
+            throw new NegativeNumberException('Cannot calculate the square root of a negative number.');
+        }
+
+        $value = Calculator::get()->sqrt($this->value);
+
+        return new BigInteger($value);
+    }
+
+    /**
+     * Returns the absolute value of this number.
+     *
+     * @return BigInteger
+     */
+    public function abs() : BigInteger
+    {
+        return $this->isNegative() ? $this->negated() : $this;
+    }
+
+    /**
+     * Returns the inverse of this number.
+     *
+     * @return BigInteger
+     */
+    public function negated() : BigInteger
+    {
+        return new BigInteger(Calculator::get()->neg($this->value));
+    }
+
+    /**
+     * Returns the integer bitwise-and combined with another integer.
+     *
+     * This method returns a negative BigInteger if and only if both operands are negative.
+     *
+     * @param BigNumber|int|float|string $that The operand. Must be convertible to an integer number.
+     *
+     * @return BigInteger
+     */
+    public function and($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        return new BigInteger(Calculator::get()->and($this->value, $that->value));
+    }
+
+    /**
+     * Returns the integer bitwise-or combined with another integer.
+     *
+     * This method returns a negative BigInteger if and only if either of the operands is negative.
+     *
+     * @param BigNumber|int|float|string $that The operand. Must be convertible to an integer number.
+     *
+     * @return BigInteger
+     */
+    public function or($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        return new BigInteger(Calculator::get()->or($this->value, $that->value));
+    }
+
+    /**
+     * Returns the integer bitwise-xor combined with another integer.
+     *
+     * This method returns a negative BigInteger if and only if exactly one of the operands is negative.
+     *
+     * @param BigNumber|int|float|string $that The operand. Must be convertible to an integer number.
+     *
+     * @return BigInteger
+     */
+    public function xor($that) : BigInteger
+    {
+        $that = BigInteger::of($that);
+
+        return new BigInteger(Calculator::get()->xor($this->value, $that->value));
+    }
+
+    /**
+     * Returns the integer left shifted by a given number of bits.
+     *
+     * @param int $distance The distance to shift.
+     *
+     * @return BigInteger
+     */
+    public function shiftedLeft(int $distance) : BigInteger
+    {
+        if ($distance === 0) {
+            return $this;
+        }
+
+        if ($distance < 0) {
+            return $this->shiftedRight(- $distance);
+        }
+
+        return $this->multipliedBy(BigInteger::of(2)->power($distance));
+    }
+
+    /**
+     * Returns the integer right shifted by a given number of bits.
+     *
+     * @param int $distance The distance to shift.
+     *
+     * @return BigInteger
+     */
+    public function shiftedRight(int $distance) : BigInteger
+    {
+        if ($distance === 0) {
+            return $this;
+        }
+
+        if ($distance < 0) {
+            return $this->shiftedLeft(- $distance);
+        }
+
+        $operand = BigInteger::of(2)->power($distance);
+
+        if ($this->isPositiveOrZero()) {
+            return $this->quotient($operand);
+        }
+
+        return $this->dividedBy($operand, RoundingMode::UP);
+    }
+
+    /**
+     * Returns the number of bits in the minimal two's-complement representation of this BigInteger, excluding a sign bit.
+     *
+     * For positive BigIntegers, this is equivalent to the number of bits in the ordinary binary representation.
+     * Computes (ceil(log2(this < 0 ? -this : this+1))).
+     *
+     * @return int
+     */
+    public function getBitLength() : int
+    {
+        if ($this->value === '0') {
+            return 0;
+        }
+
+        if ($this->isNegative()) {
+            return $this->abs()->minus(1)->getBitLength();
+        }
+
+        return strlen($this->toBase(2));
+    }
+
+    /**
+     * Returns the index of the rightmost (lowest-order) one bit in this BigInteger.
+     *
+     * Returns -1 if this BigInteger contains no one bits.
+     *
+     * @return int
+     */
+    public function getLowestSetBit() : int
+    {
+        $n = $this;
+        $bitLength = $this->getBitLength();
+
+        for ($i = 0; $i <= $bitLength; $i++) {
+            if ($n->isOdd()) {
+                return $i;
+            }
+
+            $n = $n->shiftedRight(1);
+        }
+
+        return -1;
+    }
+
+    /**
+     * Returns whether this number is even.
+     *
+     * @return bool
+     */
+    public function isEven() : bool
+    {
+        return in_array($this->value[-1], ['0', '2', '4', '6', '8'], true);
+    }
+
+    /**
+     * Returns whether this number is odd.
+     *
+     * @return bool
+     */
+    public function isOdd() : bool
+    {
+        return in_array($this->value[-1], ['1', '3', '5', '7', '9'], true);
+    }
+
+    /**
+     * Returns true if and only if the designated bit is set.
+     *
+     * Computes ((this & (1<<n)) != 0).
+     *
+     * @param int $n The bit to test, 0-based.
+     *
+     * @return bool
+     */
+    public function testBit(int $n) : bool
+    {
+        if ($n < 0) {
+            throw new \InvalidArgumentException('The bit to test cannot be negative.');
+        }
+
+        return $this->shiftedRight($n)->isOdd();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function compareTo($that) : int
+    {
+        $that = BigNumber::of($that);
+
+        if ($that instanceof BigInteger) {
+            return Calculator::get()->cmp($this->value, $that->value);
+        }
+
+        return - $that->compareTo($this);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSign() : int
+    {
+        return ($this->value === '0') ? 0 : (($this->value[0] === '-') ? -1 : 1);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigInteger() : BigInteger
+    {
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigDecimal() : BigDecimal
+    {
+        return BigDecimal::create($this->value);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigRational() : BigRational
+    {
+        return BigRational::create($this, BigInteger::one(), false);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toScale(int $scale, int $roundingMode = RoundingMode::UNNECESSARY) : BigDecimal
+    {
+        return $this->toBigDecimal()->toScale($scale, $roundingMode);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toInt() : int
+    {
+        $intValue = (int) $this->value;
+
+        if ($this->value !== (string) $intValue) {
+            throw IntegerOverflowException::toIntOverflow($this);
+        }
+
+        return $intValue;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toFloat() : float
+    {
+        return (float) $this->value;
+    }
+
+    /**
+     * Returns a string representation of this number in the given base.
+     *
+     * The output will always be lowercase for bases greater than 10.
+     *
+     * @param int $base
+     *
+     * @return string
+     *
+     * @throws \InvalidArgumentException If the base is out of range.
+     */
+    public function toBase(int $base) : string
+    {
+        if ($base === 10) {
+            return $this->value;
+        }
+
+        if ($base < 2 || $base > 36) {
+            throw new \InvalidArgumentException(\sprintf('Base %d is out of range [2, 36]', $base));
+        }
+
+        return Calculator::get()->toBase($this->value, $base);
+    }
+
+    /**
+     * Returns a string representation of this number in an arbitrary base with a custom alphabet.
+     *
+     * Because this method accepts an alphabet with any character, including dash, it does not handle negative numbers;
+     * a NegativeNumberException will be thrown when attempting to call this method on a negative number.
+     *
+     * @param string $alphabet The alphabet, for example '01' for base 2, or '01234567' for base 8.
+     *
+     * @return string
+     *
+     * @throws NegativeNumberException   If this number is negative.
+     * @throws \InvalidArgumentException If the given alphabet does not contain at least 2 chars.
+     */
+    public function toArbitraryBase(string $alphabet) : string
+    {
+        $base = \strlen($alphabet);
+
+        if ($base < 2) {
+            throw new \InvalidArgumentException('The alphabet must contain at least 2 chars.');
+        }
+
+        if ($this->value[0] === '-') {
+            throw new NegativeNumberException(__FUNCTION__ . '() does not support negative numbers.');
+        }
+
+        return Calculator::get()->toArbitraryBase($this->value, $alphabet, $base);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString() : string
+    {
+        return $this->value;
+    }
+
+    /**
+     * This method is required by interface Serializable and SHOULD NOT be accessed directly.
+     *
+     * @internal
+     *
+     * @return string
+     */
+    public function serialize() : string
+    {
+        return $this->value;
+    }
+
+    /**
+     * This method is only here to implement interface Serializable and cannot be accessed directly.
+     *
+     * @internal
+     *
+     * @param string $value
+     *
+     * @return void
+     *
+     * @throws \LogicException
+     */
+    public function unserialize($value) : void
+    {
+        if (isset($this->value)) {
+            throw new \LogicException('unserialize() is an internal function, it must not be called directly.');
+        }
+
+        $this->value = $value;
+    }
+}

vendor/brick/math/src/BigNumber.php

@@ -0,0 +1,528 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math;
+
+use Brick\Math\Exception\DivisionByZeroException;
+use Brick\Math\Exception\MathException;
+use Brick\Math\Exception\NumberFormatException;
+use Brick\Math\Exception\RoundingNecessaryException;
+
+/**
+ * Common interface for arbitrary-precision rational numbers.
+ *
+ * @psalm-immutable
+ */
+abstract class BigNumber implements \Serializable, \JsonSerializable
+{
+    /**
+     * The regular expression used to parse integer, decimal and rational numbers.
+     *
+     * @var string
+     */
+    private const PARSE_REGEXP =
+        '/^' .
+        '(?<integral>[\-\+]?[0-9]+)' .
+        '(?:' .
+            '(?:' .
+                '(?:\.(?<fractional>[0-9]+))?' .
+                '(?:[eE](?<exponent>[\-\+]?[0-9]+))?' .
+            ')' . '|' . '(?:' .
+                '(?:\/(?<denominator>[0-9]+))?' .
+            ')' .
+        ')?' .
+        '$/';
+
+    /**
+     * Creates a BigNumber of the given value.
+     *
+     * The concrete return type is dependent on the given value, with the following rules:
+     *
+     * - BigNumber instances are returned as is
+     * - integer numbers are returned as BigInteger
+     * - floating point numbers are converted to a string then parsed as such
+     * - strings containing a `/` character are returned as BigRational
+     * - strings containing a `.` character or using an exponential notation are returned as BigDecimal
+     * - strings containing only digits with an optional leading `+` or `-` sign are returned as BigInteger
+     *
+     * @param BigNumber|int|float|string $value
+     *
+     * @return BigNumber
+     *
+     * @throws NumberFormatException   If the format of the number is not valid.
+     * @throws DivisionByZeroException If the value represents a rational number with a denominator of zero.
+     *
+     * @psalm-pure
+     */
+    public static function of($value) : BigNumber
+    {
+        if ($value instanceof BigNumber) {
+            return $value;
+        }
+
+        if (\is_int($value)) {
+            return new BigInteger((string) $value);
+        }
+
+        if (is_float($value)) {
+            $value = self::floatToString($value);
+        } else {
+            $value = (string) $value;
+        }
+
+        if (\preg_match(self::PARSE_REGEXP, $value, $matches) !== 1) {
+            throw new NumberFormatException(\sprintf('The given value "%s" does not represent a valid number.', $value));
+        }
+
+        if (isset($matches['denominator'])) {
+            $numerator   = self::cleanUp($matches['integral']);
+            $denominator = \ltrim($matches['denominator'], '0');
+
+            if ($denominator === '') {
+                throw DivisionByZeroException::denominatorMustNotBeZero();
+            }
+
+            return new BigRational(new BigInteger($numerator), new BigInteger($denominator), false);
+        }
+
+        if (isset($matches['fractional']) || isset($matches['exponent'])) {
+            $fractional = isset($matches['fractional']) ? $matches['fractional'] : '';
+            $exponent = isset($matches['exponent']) ? (int) $matches['exponent'] : 0;
+
+            $unscaledValue = self::cleanUp($matches['integral'] . $fractional);
+
+            $scale = \strlen($fractional) - $exponent;
+
+            if ($scale < 0) {
+                if ($unscaledValue !== '0') {
+                    $unscaledValue .= \str_repeat('0', - $scale);
+                }
+                $scale = 0;
+            }
+
+            return new BigDecimal($unscaledValue, $scale);
+        }
+
+        $integral = self::cleanUp($matches['integral']);
+
+        return new BigInteger($integral);
+    }
+
+    /**
+     * Safely converts float to string, avoiding locale-dependent issues.
+     *
+     * @see https://github.com/brick/math/pull/20
+     *
+     * @param float $float
+     *
+     * @return string
+     *
+     * @psalm-pure
+     * @psalm-suppress ImpureFunctionCall
+     */
+    private static function floatToString(float $float) : string
+    {
+        $currentLocale = \setlocale(LC_NUMERIC, '0');
+        \setlocale(LC_NUMERIC, 'C');
+
+        $result = (string) $float;
+
+        \setlocale(LC_NUMERIC, $currentLocale);
+
+        return $result;
+    }
+
+    /**
+     * Proxy method to access protected constructors from sibling classes.
+     *
+     * @internal
+     *
+     * @param mixed ...$args The arguments to the constructor.
+     *
+     * @return static
+     *
+     * @psalm-pure
+     */
+    protected static function create(... $args) : BigNumber
+    {
+        /** @psalm-suppress TooManyArguments */
+        return new static(... $args);
+    }
+
+    /**
+     * Returns the minimum of the given values.
+     *
+     * @param BigNumber|int|float|string ...$values The numbers to compare. All the numbers need to be convertible
+     *                                              to an instance of the class this method is called on.
+     *
+     * @return static The minimum value.
+     *
+     * @throws \InvalidArgumentException If no values are given.
+     * @throws MathException             If an argument is not valid.
+     *
+     * @psalm-pure
+     */
+    public static function min(...$values) : BigNumber
+    {
+        $min = null;
+
+        foreach ($values as $value) {
+            $value = static::of($value);
+
+            if ($min === null || $value->isLessThan($min)) {
+                $min = $value;
+            }
+        }
+
+        if ($min === null) {
+            throw new \InvalidArgumentException(__METHOD__ . '() expects at least one value.');
+        }
+
+        return $min;
+    }
+
+    /**
+     * Returns the maximum of the given values.
+     *
+     * @param BigNumber|int|float|string ...$values The numbers to compare. All the numbers need to be convertible
+     *                                              to an instance of the class this method is called on.
+     *
+     * @return static The maximum value.
+     *
+     * @throws \InvalidArgumentException If no values are given.
+     * @throws MathException             If an argument is not valid.
+     *
+     * @psalm-pure
+     */
+    public static function max(...$values) : BigNumber
+    {
+        $max = null;
+
+        foreach ($values as $value) {
+            $value = static::of($value);
+
+            if ($max === null || $value->isGreaterThan($max)) {
+                $max = $value;
+            }
+        }
+
+        if ($max === null) {
+            throw new \InvalidArgumentException(__METHOD__ . '() expects at least one value.');
+        }
+
+        return $max;
+    }
+
+    /**
+     * Returns the sum of the given values.
+     *
+     * @param BigNumber|int|float|string ...$values The numbers to add. All the numbers need to be convertible
+     *                                              to an instance of the class this method is called on.
+     *
+     * @return static The sum.
+     *
+     * @throws \InvalidArgumentException If no values are given.
+     * @throws MathException             If an argument is not valid.
+     *
+     * @psalm-pure
+     */
+    public static function sum(...$values) : BigNumber
+    {
+        /** @var BigNumber|null $sum */
+        $sum = null;
+
+        foreach ($values as $value) {
+            $value = static::of($value);
+
+            if ($sum === null) {
+                $sum = $value;
+            } else {
+                $sum = self::add($sum, $value);
+            }
+        }
+
+        if ($sum === null) {
+            throw new \InvalidArgumentException(__METHOD__ . '() expects at least one value.');
+        }
+
+        return $sum;
+    }
+
+    /**
+     * Adds two BigNumber instances in the correct order to avoid a RoundingNecessaryException.
+     *
+     * @todo This could be better resolved by creating an abstract protected method in BigNumber, and leaving to
+     *       concrete classes the responsibility to perform the addition themselves or delegate it to the given number,
+     *       depending on their ability to perform the operation. This will also require a version bump because we're
+     *       potentially breaking custom BigNumber implementations (if any...)
+     *
+     * @param BigNumber $a
+     * @param BigNumber $b
+     *
+     * @return BigNumber
+     *
+     * @psalm-pure
+     */
+    private static function add(BigNumber $a, BigNumber $b) : BigNumber
+    {
+        if ($a instanceof BigRational) {
+            return $a->plus($b);
+        }
+
+        if ($b instanceof BigRational) {
+            return $b->plus($a);
+        }
+
+        if ($a instanceof BigDecimal) {
+            return $a->plus($b);
+        }
+
+        if ($b instanceof BigDecimal) {
+            return $b->plus($a);
+        }
+
+        /** @var BigInteger $a */
+
+        return $a->plus($b);
+    }
+
+    /**
+     * Removes optional leading zeros and + sign from the given number.
+     *
+     * @param string $number The number, validated as a non-empty string of digits with optional sign.
+     *
+     * @return string
+     *
+     * @psalm-pure
+     */
+    private static function cleanUp(string $number) : string
+    {
+        $firstChar = $number[0];
+
+        if ($firstChar === '+' || $firstChar === '-') {
+            $number = \substr($number, 1);
+        }
+
+        $number = \ltrim($number, '0');
+
+        if ($number === '') {
+            return '0';
+        }
+
+        if ($firstChar === '-') {
+            return '-' . $number;
+        }
+
+        return $number;
+    }
+
+    /**
+     * Checks if this number is equal to the given one.
+     *
+     * @param BigNumber|int|float|string $that
+     *
+     * @return bool
+     */
+    public function isEqualTo($that) : bool
+    {
+        return $this->compareTo($that) === 0;
+    }
+
+    /**
+     * Checks if this number is strictly lower than the given one.
+     *
+     * @param BigNumber|int|float|string $that
+     *
+     * @return bool
+     */
+    public function isLessThan($that) : bool
+    {
+        return $this->compareTo($that) < 0;
+    }
+
+    /**
+     * Checks if this number is lower than or equal to the given one.
+     *
+     * @param BigNumber|int|float|string $that
+     *
+     * @return bool
+     */
+    public function isLessThanOrEqualTo($that) : bool
+    {
+        return $this->compareTo($that) <= 0;
+    }
+
+    /**
+     * Checks if this number is strictly greater than the given one.
+     *
+     * @param BigNumber|int|float|string $that
+     *
+     * @return bool
+     */
+    public function isGreaterThan($that) : bool
+    {
+        return $this->compareTo($that) > 0;
+    }
+
+    /**
+     * Checks if this number is greater than or equal to the given one.
+     *
+     * @param BigNumber|int|float|string $that
+     *
+     * @return bool
+     */
+    public function isGreaterThanOrEqualTo($that) : bool
+    {
+        return $this->compareTo($that) >= 0;
+    }
+
+    /**
+     * Checks if this number equals zero.
+     *
+     * @return bool
+     */
+    public function isZero() : bool
+    {
+        return $this->getSign() === 0;
+    }
+
+    /**
+     * Checks if this number is strictly negative.
+     *
+     * @return bool
+     */
+    public function isNegative() : bool
+    {
+        return $this->getSign() < 0;
+    }
+
+    /**
+     * Checks if this number is negative or zero.
+     *
+     * @return bool
+     */
+    public function isNegativeOrZero() : bool
+    {
+        return $this->getSign() <= 0;
+    }
+
+    /**
+     * Checks if this number is strictly positive.
+     *
+     * @return bool
+     */
+    public function isPositive() : bool
+    {
+        return $this->getSign() > 0;
+    }
+
+    /**
+     * Checks if this number is positive or zero.
+     *
+     * @return bool
+     */
+    public function isPositiveOrZero() : bool
+    {
+        return $this->getSign() >= 0;
+    }
+
+    /**
+     * Returns the sign of this number.
+     *
+     * @return int -1 if the number is negative, 0 if zero, 1 if positive.
+     */
+    abstract public function getSign() : int;
+
+    /**
+     * Compares this number to the given one.
+     *
+     * @param BigNumber|int|float|string $that
+     *
+     * @return int [-1,0,1] If `$this` is lower than, equal to, or greater than `$that`.
+     *
+     * @throws MathException If the number is not valid.
+     */
+    abstract public function compareTo($that) : int;
+
+    /**
+     * Converts this number to a BigInteger.
+     *
+     * @return BigInteger The converted number.
+     *
+     * @throws RoundingNecessaryException If this number cannot be converted to a BigInteger without rounding.
+     */
+    abstract public function toBigInteger() : BigInteger;
+
+    /**
+     * Converts this number to a BigDecimal.
+     *
+     * @return BigDecimal The converted number.
+     *
+     * @throws RoundingNecessaryException If this number cannot be converted to a BigDecimal without rounding.
+     */
+    abstract public function toBigDecimal() : BigDecimal;
+
+    /**
+     * Converts this number to a BigRational.
+     *
+     * @return BigRational The converted number.
+     */
+    abstract public function toBigRational() : BigRational;
+
+    /**
+     * Converts this number to a BigDecimal with the given scale, using rounding if necessary.
+     *
+     * @param int $scale        The scale of the resulting `BigDecimal`.
+     * @param int $roundingMode A `RoundingMode` constant.
+     *
+     * @return BigDecimal
+     *
+     * @throws RoundingNecessaryException If this number cannot be converted to the given scale without rounding.
+     *                                    This only applies when RoundingMode::UNNECESSARY is used.
+     */
+    abstract public function toScale(int $scale, int $roundingMode = RoundingMode::UNNECESSARY) : BigDecimal;
+
+    /**
+     * Returns the exact value of this number as a native integer.
+     *
+     * If this number cannot be converted to a native integer without losing precision, an exception is thrown.
+     * Note that the acceptable range for an integer depends on the platform and differs for 32-bit and 64-bit.
+     *
+     * @return int The converted value.
+     *
+     * @throws MathException If this number cannot be exactly converted to a native integer.
+     */
+    abstract public function toInt() : int;
+
+    /**
+     * Returns an approximation of this number as a floating-point value.
+     *
+     * Note that this method can discard information as the precision of a floating-point value
+     * is inherently limited.
+     *
+     * If the number is greater than the largest representable floating point number, positive infinity is returned.
+     * If the number is less than the smallest representable floating point number, negative infinity is returned.
+     *
+     * @return float The converted value.
+     */
+    abstract public function toFloat() : float;
+
+    /**
+     * Returns a string representation of this number.
+     *
+     * The output of this method can be parsed by the `of()` factory method;
+     * this will yield an object equal to this one, without any information loss.
+     *
+     * @return string
+     */
+    abstract public function __toString() : string;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function jsonSerialize() : string
+    {
+        return $this->__toString();
+    }
+}

vendor/brick/math/src/BigRational.php

@@ -0,0 +1,479 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math;
+
+use Brick\Math\Exception\DivisionByZeroException;
+use Brick\Math\Exception\MathException;
+use Brick\Math\Exception\NumberFormatException;
+use Brick\Math\Exception\RoundingNecessaryException;
+
+/**
+ * An arbitrarily large rational number.
+ *
+ * This class is immutable.
+ *
+ * @psalm-immutable
+ */
+final class BigRational extends BigNumber
+{
+    /**
+     * The numerator.
+     *
+     * @var BigInteger
+     */
+    private $numerator;
+
+    /**
+     * The denominator. Always strictly positive.
+     *
+     * @var BigInteger
+     */
+    private $denominator;
+
+    /**
+     * Protected constructor. Use a factory method to obtain an instance.
+     *
+     * @param BigInteger $numerator        The numerator.
+     * @param BigInteger $denominator      The denominator.
+     * @param bool       $checkDenominator Whether to check the denominator for negative and zero.
+     *
+     * @throws DivisionByZeroException If the denominator is zero.
+     */
+    protected function __construct(BigInteger $numerator, BigInteger $denominator, bool $checkDenominator)
+    {
+        if ($checkDenominator) {
+            if ($denominator->isZero()) {
+                throw DivisionByZeroException::denominatorMustNotBeZero();
+            }
+
+            if ($denominator->isNegative()) {
+                $numerator   = $numerator->negated();
+                $denominator = $denominator->negated();
+            }
+        }
+
+        $this->numerator   = $numerator;
+        $this->denominator = $denominator;
+    }
+
+    /**
+     * Creates a BigRational of the given value.
+     *
+     * @param BigNumber|int|float|string $value
+     *
+     * @return BigRational
+     *
+     * @throws MathException If the value cannot be converted to a BigRational.
+     *
+     * @psalm-pure
+     */
+    public static function of($value) : BigNumber
+    {
+        return parent::of($value)->toBigRational();
+    }
+
+    /**
+     * Creates a BigRational out of a numerator and a denominator.
+     *
+     * If the denominator is negative, the signs of both the numerator and the denominator
+     * will be inverted to ensure that the denominator is always positive.
+     *
+     * @param BigNumber|int|float|string $numerator   The numerator. Must be convertible to a BigInteger.
+     * @param BigNumber|int|float|string $denominator The denominator. Must be convertible to a BigInteger.
+     *
+     * @return BigRational
+     *
+     * @throws NumberFormatException      If an argument does not represent a valid number.
+     * @throws RoundingNecessaryException If an argument represents a non-integer number.
+     * @throws DivisionByZeroException    If the denominator is zero.
+     *
+     * @psalm-pure
+     */
+    public static function nd($numerator, $denominator) : BigRational
+    {
+        $numerator   = BigInteger::of($numerator);
+        $denominator = BigInteger::of($denominator);
+
+        return new BigRational($numerator, $denominator, true);
+    }
+
+    /**
+     * Returns a BigRational representing zero.
+     *
+     * @return BigRational
+     *
+     * @psalm-pure
+     */
+    public static function zero() : BigRational
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $zero;
+
+        if ($zero === null) {
+            $zero = new BigRational(BigInteger::zero(), BigInteger::one(), false);
+        }
+
+        return $zero;
+    }
+
+    /**
+     * Returns a BigRational representing one.
+     *
+     * @return BigRational
+     *
+     * @psalm-pure
+     */
+    public static function one() : BigRational
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $one;
+
+        if ($one === null) {
+            $one = new BigRational(BigInteger::one(), BigInteger::one(), false);
+        }
+
+        return $one;
+    }
+
+    /**
+     * Returns a BigRational representing ten.
+     *
+     * @return BigRational
+     *
+     * @psalm-pure
+     */
+    public static function ten() : BigRational
+    {
+        /** @psalm-suppress ImpureStaticVariable */
+        static $ten;
+
+        if ($ten === null) {
+            $ten = new BigRational(BigInteger::ten(), BigInteger::one(), false);
+        }
+
+        return $ten;
+    }
+
+    /**
+     * @return BigInteger
+     */
+    public function getNumerator() : BigInteger
+    {
+        return $this->numerator;
+    }
+
+    /**
+     * @return BigInteger
+     */
+    public function getDenominator() : BigInteger
+    {
+        return $this->denominator;
+    }
+
+    /**
+     * Returns the quotient of the division of the numerator by the denominator.
+     *
+     * @return BigInteger
+     */
+    public function quotient() : BigInteger
+    {
+        return $this->numerator->quotient($this->denominator);
+    }
+
+    /**
+     * Returns the remainder of the division of the numerator by the denominator.
+     *
+     * @return BigInteger
+     */
+    public function remainder() : BigInteger
+    {
+        return $this->numerator->remainder($this->denominator);
+    }
+
+    /**
+     * Returns the quotient and remainder of the division of the numerator by the denominator.
+     *
+     * @return BigInteger[]
+     */
+    public function quotientAndRemainder() : array
+    {
+        return $this->numerator->quotientAndRemainder($this->denominator);
+    }
+
+    /**
+     * Returns the sum of this number and the given one.
+     *
+     * @param BigNumber|int|float|string $that The number to add.
+     *
+     * @return BigRational The result.
+     *
+     * @throws MathException If the number is not valid.
+     */
+    public function plus($that) : BigRational
+    {
+        $that = BigRational::of($that);
+
+        $numerator   = $this->numerator->multipliedBy($that->denominator);
+        $numerator   = $numerator->plus($that->numerator->multipliedBy($this->denominator));
+        $denominator = $this->denominator->multipliedBy($that->denominator);
+
+        return new BigRational($numerator, $denominator, false);
+    }
+
+    /**
+     * Returns the difference of this number and the given one.
+     *
+     * @param BigNumber|int|float|string $that The number to subtract.
+     *
+     * @return BigRational The result.
+     *
+     * @throws MathException If the number is not valid.
+     */
+    public function minus($that) : BigRational
+    {
+        $that = BigRational::of($that);
+
+        $numerator   = $this->numerator->multipliedBy($that->denominator);
+        $numerator   = $numerator->minus($that->numerator->multipliedBy($this->denominator));
+        $denominator = $this->denominator->multipliedBy($that->denominator);
+
+        return new BigRational($numerator, $denominator, false);
+    }
+
+    /**
+     * Returns the product of this number and the given one.
+     *
+     * @param BigNumber|int|float|string $that The multiplier.
+     *
+     * @return BigRational The result.
+     *
+     * @throws MathException If the multiplier is not a valid number.
+     */
+    public function multipliedBy($that) : BigRational
+    {
+        $that = BigRational::of($that);
+
+        $numerator   = $this->numerator->multipliedBy($that->numerator);
+        $denominator = $this->denominator->multipliedBy($that->denominator);
+
+        return new BigRational($numerator, $denominator, false);
+    }
+
+    /**
+     * Returns the result of the division of this number by the given one.
+     *
+     * @param BigNumber|int|float|string $that The divisor.
+     *
+     * @return BigRational The result.
+     *
+     * @throws MathException If the divisor is not a valid number, or is zero.
+     */
+    public function dividedBy($that) : BigRational
+    {
+        $that = BigRational::of($that);
+
+        $numerator   = $this->numerator->multipliedBy($that->denominator);
+        $denominator = $this->denominator->multipliedBy($that->numerator);
+
+        return new BigRational($numerator, $denominator, true);
+    }
+
+    /**
+     * Returns this number exponentiated to the given value.
+     *
+     * @param int $exponent The exponent.
+     *
+     * @return BigRational The result.
+     *
+     * @throws \InvalidArgumentException If the exponent is not in the range 0 to 1,000,000.
+     */
+    public function power(int $exponent) : BigRational
+    {
+        if ($exponent === 0) {
+            $one = BigInteger::one();
+
+            return new BigRational($one, $one, false);
+        }
+
+        if ($exponent === 1) {
+            return $this;
+        }
+
+        return new BigRational(
+            $this->numerator->power($exponent),
+            $this->denominator->power($exponent),
+            false
+        );
+    }
+
+    /**
+     * Returns the reciprocal of this BigRational.
+     *
+     * The reciprocal has the numerator and denominator swapped.
+     *
+     * @return BigRational
+     *
+     * @throws DivisionByZeroException If the numerator is zero.
+     */
+    public function reciprocal() : BigRational
+    {
+        return new BigRational($this->denominator, $this->numerator, true);
+    }
+
+    /**
+     * Returns the absolute value of this BigRational.
+     *
+     * @return BigRational
+     */
+    public function abs() : BigRational
+    {
+        return new BigRational($this->numerator->abs(), $this->denominator, false);
+    }
+
+    /**
+     * Returns the negated value of this BigRational.
+     *
+     * @return BigRational
+     */
+    public function negated() : BigRational
+    {
+        return new BigRational($this->numerator->negated(), $this->denominator, false);
+    }
+
+    /**
+     * Returns the simplified value of this BigRational.
+     *
+     * @return BigRational
+     */
+    public function simplified() : BigRational
+    {
+        $gcd = $this->numerator->gcd($this->denominator);
+
+        $numerator = $this->numerator->quotient($gcd);
+        $denominator = $this->denominator->quotient($gcd);
+
+        return new BigRational($numerator, $denominator, false);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function compareTo($that) : int
+    {
+        return $this->minus($that)->getSign();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getSign() : int
+    {
+        return $this->numerator->getSign();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigInteger() : BigInteger
+    {
+        $simplified = $this->simplified();
+
+        if (! $simplified->denominator->isEqualTo(1)) {
+            throw new RoundingNecessaryException('This rational number cannot be represented as an integer value without rounding.');
+        }
+
+        return $simplified->numerator;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigDecimal() : BigDecimal
+    {
+        return $this->numerator->toBigDecimal()->exactlyDividedBy($this->denominator);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBigRational() : BigRational
+    {
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toScale(int $scale, int $roundingMode = RoundingMode::UNNECESSARY) : BigDecimal
+    {
+        return $this->numerator->toBigDecimal()->dividedBy($this->denominator, $scale, $roundingMode);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toInt() : int
+    {
+        return $this->toBigInteger()->toInt();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toFloat() : float
+    {
+        return $this->numerator->toFloat() / $this->denominator->toFloat();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString() : string
+    {
+        $numerator   = (string) $this->numerator;
+        $denominator = (string) $this->denominator;
+
+        if ($denominator === '1') {
+            return $numerator;
+        }
+
+        return $this->numerator . '/' . $this->denominator;
+    }
+
+    /**
+     * This method is required by interface Serializable and SHOULD NOT be accessed directly.
+     *
+     * @internal
+     *
+     * @return string
+     */
+    public function serialize() : string
+    {
+        return $this->numerator . '/' . $this->denominator;
+    }
+
+    /**
+     * This method is only here to implement interface Serializable and cannot be accessed directly.
+     *
+     * @internal
+     *
+     * @param string $value
+     *
+     * @return void
+     *
+     * @throws \LogicException
+     */
+    public function unserialize($value) : void
+    {
+        if (isset($this->numerator)) {
+            throw new \LogicException('unserialize() is an internal function, it must not be called directly.');
+        }
+
+        [$numerator, $denominator] = \explode('/', $value);
+
+        $this->numerator   = BigInteger::of($numerator);
+        $this->denominator = BigInteger::of($denominator);
+    }
+}

vendor/brick/math/src/Exception/DivisionByZeroException.php

@@ -0,0 +1,31 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Exception;
+
+/**
+ * Exception thrown when a division by zero occurs.
+ */
+class DivisionByZeroException extends MathException
+{
+    /**
+     * @return DivisionByZeroException
+     *
+     * @psalm-pure
+     */
+    public static function divisionByZero() : DivisionByZeroException
+    {
+        return new self('Division by zero.');
+    }
+
+    /**
+     * @return DivisionByZeroException
+     *
+     * @psalm-pure
+     */
+    public static function denominatorMustNotBeZero() : DivisionByZeroException
+    {
+        return new self('The denominator of a rational number cannot be zero.');
+    }
+}

vendor/brick/math/src/Exception/IntegerOverflowException.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Exception;
+
+use Brick\Math\BigInteger;
+
+/**
+ * Exception thrown when an integer overflow occurs.
+ */
+class IntegerOverflowException extends MathException
+{
+    /**
+     * @param BigInteger $value
+     *
+     * @return IntegerOverflowException
+     *
+     * @psalm-pure
+     */
+    public static function toIntOverflow(BigInteger $value) : IntegerOverflowException
+    {
+        $message = '%s is out of range %d to %d and cannot be represented as an integer.';
+
+        return new self(\sprintf($message, (string) $value, PHP_INT_MIN, PHP_INT_MAX));
+    }
+}

vendor/brick/math/src/Exception/MathException.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Exception;
+
+/**
+ * Base class for all math exceptions.
+ *
+ * This class is abstract to ensure that only fine-grained exceptions are thrown throughout the code.
+ */
+abstract class MathException extends \RuntimeException
+{
+}

vendor/brick/math/src/Exception/NegativeNumberException.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Exception;
+
+/**
+ * Exception thrown when attempting to perform an unsupported operation, such as a square root, on a negative number.
+ */
+class NegativeNumberException extends MathException
+{
+}

vendor/brick/math/src/Exception/NumberFormatException.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Exception;
+
+/**
+ * Exception thrown when attempting to create a number from a string with an invalid format.
+ */
+class NumberFormatException extends MathException
+{
+    /**
+     * @param string $char The failing character.
+     *
+     * @return NumberFormatException
+     *
+     * @psalm-pure
+     */
+    public static function charNotInAlphabet(string $char) : self
+    {
+        $ord = \ord($char);
+
+        if ($ord < 32 || $ord > 126) {
+            $char = \strtoupper(\dechex($ord));
+
+            if ($ord < 10) {
+                $char = '0' . $char;
+            }
+        } else {
+            $char = '"' . $char . '"';
+        }
+
+        return new self(sprintf('Char %s is not a valid character in the given alphabet.', $char));
+    }
+}

vendor/brick/math/src/Exception/RoundingNecessaryException.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Exception;
+
+/**
+ * Exception thrown when a number cannot be represented at the requested scale without rounding.
+ */
+class RoundingNecessaryException extends MathException
+{
+    /**
+     * @return RoundingNecessaryException
+     *
+     * @psalm-pure
+     */
+    public static function roundingNecessary() : RoundingNecessaryException
+    {
+        return new self('Rounding is necessary to represent the result of the operation at this scale.');
+    }
+}

vendor/brick/math/src/Internal/Calculator.php

@@ -0,0 +1,686 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Internal;
+
+use Brick\Math\Exception\RoundingNecessaryException;
+use Brick\Math\RoundingMode;
+
+/**
+ * Performs basic operations on arbitrary size integers.
+ *
+ * Unless otherwise specified, all parameters must be validated as non-empty strings of digits,
+ * without leading zero, and with an optional leading minus sign if the number is not zero.
+ *
+ * Any other parameter format will lead to undefined behaviour.
+ * All methods must return strings respecting this format, unless specified otherwise.
+ *
+ * @internal
+ *
+ * @psalm-immutable
+ */
+abstract class Calculator
+{
+    /**
+     * The maximum exponent value allowed for the pow() method.
+     */
+    public const MAX_POWER = 1000000;
+
+    /**
+     * The alphabet for converting from and to base 2 to 36, lowercase.
+     */
+    public const ALPHABET = '0123456789abcdefghijklmnopqrstuvwxyz';
+
+    /**
+     * The Calculator instance in use.
+     *
+     * @var Calculator|null
+     */
+    private static $instance;
+
+    /**
+     * Sets the Calculator instance to use.
+     *
+     * An instance is typically set only in unit tests: the autodetect is usually the best option.
+     *
+     * @param Calculator|null $calculator The calculator instance, or NULL to revert to autodetect.
+     *
+     * @return void
+     */
+    final public static function set(?Calculator $calculator) : void
+    {
+        self::$instance = $calculator;
+    }
+
+    /**
+     * Returns the Calculator instance to use.
+     *
+     * If none has been explicitly set, the fastest available implementation will be returned.
+     *
+     * @return Calculator
+     *
+     * @psalm-pure
+     * @psalm-suppress ImpureStaticProperty
+     */
+    final public static function get() : Calculator
+    {
+        if (self::$instance === null) {
+            /** @psalm-suppress ImpureMethodCall */
+            self::$instance = self::detect();
+        }
+
+        return self::$instance;
+    }
+
+    /**
+     * Returns the fastest available Calculator implementation.
+     *
+     * @codeCoverageIgnore
+     *
+     * @return Calculator
+     */
+    private static function detect() : Calculator
+    {
+        if (\extension_loaded('gmp')) {
+            return new Calculator\GmpCalculator();
+        }
+
+        if (\extension_loaded('bcmath')) {
+            return new Calculator\BcMathCalculator();
+        }
+
+        return new Calculator\NativeCalculator();
+    }
+
+    /**
+     * Extracts the sign & digits of the operands.
+     *
+     * @param string $a The first operand.
+     * @param string $b The second operand.
+     *
+     * @return array{0: bool, 1: bool, 2: string, 3: string} Whether $a and $b are negative, followed by their digits.
+     */
+    final protected function init(string $a, string $b) : array
+    {
+        return [
+            $aNeg = ($a[0] === '-'),
+            $bNeg = ($b[0] === '-'),
+
+            $aNeg ? \substr($a, 1) : $a,
+            $bNeg ? \substr($b, 1) : $b,
+        ];
+    }
+
+    /**
+     * Returns the absolute value of a number.
+     *
+     * @param string $n The number.
+     *
+     * @return string The absolute value.
+     */
+    final public function abs(string $n) : string
+    {
+        return ($n[0] === '-') ? \substr($n, 1) : $n;
+    }
+
+    /**
+     * Negates a number.
+     *
+     * @param string $n The number.
+     *
+     * @return string The negated value.
+     */
+    final public function neg(string $n) : string
+    {
+        if ($n === '0') {
+            return '0';
+        }
+
+        if ($n[0] === '-') {
+            return \substr($n, 1);
+        }
+
+        return '-' . $n;
+    }
+
+    /**
+     * Compares two numbers.
+     *
+     * @param string $a The first number.
+     * @param string $b The second number.
+     *
+     * @return int [-1, 0, 1] If the first number is less than, equal to, or greater than the second number.
+     */
+    final public function cmp(string $a, string $b) : int
+    {
+        [$aNeg, $bNeg, $aDig, $bDig] = $this->init($a, $b);
+
+        if ($aNeg && ! $bNeg) {
+            return -1;
+        }
+
+        if ($bNeg && ! $aNeg) {
+            return 1;
+        }
+
+        $aLen = \strlen($aDig);
+        $bLen = \strlen($bDig);
+
+        if ($aLen < $bLen) {
+            $result = -1;
+        } elseif ($aLen > $bLen) {
+            $result = 1;
+        } else {
+            $result = $aDig <=> $bDig;
+        }
+
+        return $aNeg ? -$result : $result;
+    }
+
+    /**
+     * Adds two numbers.
+     *
+     * @param string $a The augend.
+     * @param string $b The addend.
+     *
+     * @return string The sum.
+     */
+    abstract public function add(string $a, string $b) : string;
+
+    /**
+     * Subtracts two numbers.
+     *
+     * @param string $a The minuend.
+     * @param string $b The subtrahend.
+     *
+     * @return string The difference.
+     */
+    abstract public function sub(string $a, string $b) : string;
+
+    /**
+     * Multiplies two numbers.
+     *
+     * @param string $a The multiplicand.
+     * @param string $b The multiplier.
+     *
+     * @return string The product.
+     */
+    abstract public function mul(string $a, string $b) : string;
+
+    /**
+     * Returns the quotient of the division of two numbers.
+     *
+     * @param string $a The dividend.
+     * @param string $b The divisor, must not be zero.
+     *
+     * @return string The quotient.
+     */
+    abstract public function divQ(string $a, string $b) : string;
+
+    /**
+     * Returns the remainder of the division of two numbers.
+     *
+     * @param string $a The dividend.
+     * @param string $b The divisor, must not be zero.
+     *
+     * @return string The remainder.
+     */
+    abstract public function divR(string $a, string $b) : string;
+
+    /**
+     * Returns the quotient and remainder of the division of two numbers.
+     *
+     * @param string $a The dividend.
+     * @param string $b The divisor, must not be zero.
+     *
+     * @return string[] An array containing the quotient and remainder.
+     */
+    abstract public function divQR(string $a, string $b) : array;
+
+    /**
+     * Exponentiates a number.
+     *
+     * @param string $a The base number.
+     * @param int    $e The exponent, validated as an integer between 0 and MAX_POWER.
+     *
+     * @return string The power.
+     */
+    abstract public function pow(string $a, int $e) : string;
+
+    /**
+     * Raises a number into power with modulo.
+     *
+     * @param string $base The base number; must be positive or zero.
+     * @param string $exp  The exponent; must be positive or zero.
+     * @param string $mod  The modulo; must be strictly positive.
+     *
+     * @return string The power.
+     */
+    abstract function powmod(string $base, string $exp, string $mod) : string;
+
+    /**
+     * Returns the greatest common divisor of the two numbers.
+     *
+     * This method can be overridden by the concrete implementation if the underlying library
+     * has built-in support for GCD calculations.
+     *
+     * @param string $a The first number.
+     * @param string $b The second number.
+     *
+     * @return string The GCD, always positive, or zero if both arguments are zero.
+     */
+    public function gcd(string $a, string $b) : string
+    {
+        if ($a === '0') {
+            return $this->abs($b);
+        }
+
+        if ($b === '0') {
+            return $this->abs($a);
+        }
+
+        return $this->gcd($b, $this->divR($a, $b));
+    }
+
+    /**
+     * Returns the square root of the given number, rounded down.
+     *
+     * The result is the largest x such that x² ≤ n.
+     * The input MUST NOT be negative.
+     *
+     * @param string $n The number.
+     *
+     * @return string The square root.
+     */
+    abstract public function sqrt(string $n) : string;
+
+    /**
+     * Converts a number from an arbitrary base.
+     *
+     * This method can be overridden by the concrete implementation if the underlying library
+     * has built-in support for base conversion.
+     *
+     * @param string $number The number, positive or zero, non-empty, case-insensitively validated for the given base.
+     * @param int    $base   The base of the number, validated from 2 to 36.
+     *
+     * @return string The converted number, following the Calculator conventions.
+     */
+    public function fromBase(string $number, int $base) : string
+    {
+        return $this->fromArbitraryBase(\strtolower($number), self::ALPHABET, $base);
+    }
+
+    /**
+     * Converts a number to an arbitrary base.
+     *
+     * This method can be overridden by the concrete implementation if the underlying library
+     * has built-in support for base conversion.
+     *
+     * @param string $number The number to convert, following the Calculator conventions.
+     * @param int    $base   The base to convert to, validated from 2 to 36.
+     *
+     * @return string The converted number, lowercase.
+     */
+    public function toBase(string $number, int $base) : string
+    {
+        $negative = ($number[0] === '-');
+
+        if ($negative) {
+            $number = \substr($number, 1);
+        }
+
+        $number = $this->toArbitraryBase($number, self::ALPHABET, $base);
+
+        if ($negative) {
+            return '-' . $number;
+        }
+
+        return $number;
+    }
+
+    /**
+     * Converts a non-negative number in an arbitrary base using a custom alphabet, to base 10.
+     *
+     * @param string $number   The number to convert, validated as a non-empty string,
+     *                         containing only chars in the given alphabet/base.
+     * @param string $alphabet The alphabet that contains every digit, validated as 2 chars minimum.
+     * @param int    $base     The base of the number, validated from 2 to alphabet length.
+     *
+     * @return string The number in base 10, following the Calculator conventions.
+     */
+    final public function fromArbitraryBase(string $number, string $alphabet, int $base) : string
+    {
+        // remove leading "zeros"
+        $number = \ltrim($number, $alphabet[0]);
+
+        if ($number === '') {
+            return '0';
+        }
+
+        // optimize for "one"
+        if ($number === $alphabet[1]) {
+            return '1';
+        }
+
+        $result = '0';
+        $power = '1';
+
+        $base = (string) $base;
+
+        for ($i = \strlen($number) - 1; $i >= 0; $i--) {
+            $index = \strpos($alphabet, $number[$i]);
+
+            if ($index !== 0) {
+                $result = $this->add($result, ($index === 1)
+                    ? $power
+                    : $this->mul($power, (string) $index)
+                );
+            }
+
+            if ($i !== 0) {
+                $power = $this->mul($power, $base);
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * Converts a non-negative number to an arbitrary base using a custom alphabet.
+     *
+     * @param string $number   The number to convert, positive or zero, following the Calculator conventions.
+     * @param string $alphabet The alphabet that contains every digit, validated as 2 chars minimum.
+     * @param int    $base     The base to convert to, validated from 2 to alphabet length.
+     *
+     * @return string The converted number in the given alphabet.
+     */
+    final public function toArbitraryBase(string $number, string $alphabet, int $base) : string
+    {
+        if ($number === '0') {
+            return $alphabet[0];
+        }
+
+        $base = (string) $base;
+        $result = '';
+
+        while ($number !== '0') {
+            [$number, $remainder] = $this->divQR($number, $base);
+            $remainder = (int) $remainder;
+
+            $result .= $alphabet[$remainder];
+        }
+
+        return \strrev($result);
+    }
+
+    /**
+     * Performs a rounded division.
+     *
+     * Rounding is performed when the remainder of the division is not zero.
+     *
+     * @param string $a            The dividend.
+     * @param string $b            The divisor.
+     * @param int    $roundingMode The rounding mode.
+     *
+     * @return string
+     *
+     * @throws \InvalidArgumentException  If the rounding mode is invalid.
+     * @throws RoundingNecessaryException If RoundingMode::UNNECESSARY is provided but rounding is necessary.
+     */
+    final public function divRound(string $a, string $b, int $roundingMode) : string
+    {
+        [$quotient, $remainder] = $this->divQR($a, $b);
+
+        $hasDiscardedFraction = ($remainder !== '0');
+        $isPositiveOrZero = ($a[0] === '-') === ($b[0] === '-');
+
+        $discardedFractionSign = function() use ($remainder, $b) : int {
+            $r = $this->abs($this->mul($remainder, '2'));
+            $b = $this->abs($b);
+
+            return $this->cmp($r, $b);
+        };
+
+        $increment = false;
+
+        switch ($roundingMode) {
+            case RoundingMode::UNNECESSARY:
+                if ($hasDiscardedFraction) {
+                    throw RoundingNecessaryException::roundingNecessary();
+                }
+                break;
+
+            case RoundingMode::UP:
+                $increment = $hasDiscardedFraction;
+                break;
+
+            case RoundingMode::DOWN:
+                break;
+
+            case RoundingMode::CEILING:
+                $increment = $hasDiscardedFraction && $isPositiveOrZero;
+                break;
+
+            case RoundingMode::FLOOR:
+                $increment = $hasDiscardedFraction && ! $isPositiveOrZero;
+                break;
+
+            case RoundingMode::HALF_UP:
+                $increment = $discardedFractionSign() >= 0;
+                break;
+
+            case RoundingMode::HALF_DOWN:
+                $increment = $discardedFractionSign() > 0;
+                break;
+
+            case RoundingMode::HALF_CEILING:
+                $increment = $isPositiveOrZero ? $discardedFractionSign() >= 0 : $discardedFractionSign() > 0;
+                break;
+
+            case RoundingMode::HALF_FLOOR:
+                $increment = $isPositiveOrZero ? $discardedFractionSign() > 0 : $discardedFractionSign() >= 0;
+                break;
+
+            case RoundingMode::HALF_EVEN:
+                $lastDigit = (int) $quotient[-1];
+                $lastDigitIsEven = ($lastDigit % 2 === 0);
+                $increment = $lastDigitIsEven ? $discardedFractionSign() > 0 : $discardedFractionSign() >= 0;
+                break;
+
+            default:
+                throw new \InvalidArgumentException('Invalid rounding mode.');
+        }
+
+        if ($increment) {
+            return $this->add($quotient, $isPositiveOrZero ? '1' : '-1');
+        }
+
+        return $quotient;
+    }
+
+    /**
+     * Calculates bitwise AND of two numbers.
+     *
+     * This method can be overridden by the concrete implementation if the underlying library
+     * has built-in support for bitwise operations.
+     *
+     * @param string $a
+     * @param string $b
+     *
+     * @return string
+     */
+    public function and(string $a, string $b) : string
+    {
+        return $this->bitwise('and', $a, $b);
+    }
+
+    /**
+     * Calculates bitwise OR of two numbers.
+     *
+     * This method can be overridden by the concrete implementation if the underlying library
+     * has built-in support for bitwise operations.
+     *
+     * @param string $a
+     * @param string $b
+     *
+     * @return string
+     */
+    public function or(string $a, string $b) : string
+    {
+        return $this->bitwise('or', $a, $b);
+    }
+
+    /**
+     * Calculates bitwise XOR of two numbers.
+     *
+     * This method can be overridden by the concrete implementation if the underlying library
+     * has built-in support for bitwise operations.
+     *
+     * @param string $a
+     * @param string $b
+     *
+     * @return string
+     */
+    public function xor(string $a, string $b) : string
+    {
+        return $this->bitwise('xor', $a, $b);
+    }
+
+    /**
+     * Performs a bitwise operation on a decimal number.
+     *
+     * @param string $operator The operator to use, must be "and", "or" or "xor".
+     * @param string $a        The left operand.
+     * @param string $b        The right operand.
+     *
+     * @return string
+     */
+    private function bitwise(string $operator, string $a, string $b) : string
+    {
+        [$aNeg, $bNeg, $aDig, $bDig] = $this->init($a, $b);
+
+        $aBin = $this->toBinary($aDig);
+        $bBin = $this->toBinary($bDig);
+
+        $aLen = \strlen($aBin);
+        $bLen = \strlen($bBin);
+
+        if ($aLen > $bLen) {
+            $bBin = \str_repeat("\x00", $aLen - $bLen) . $bBin;
+        } elseif ($bLen > $aLen) {
+            $aBin = \str_repeat("\x00", $bLen - $aLen) . $aBin;
+        }
+
+        if ($aNeg) {
+            $aBin = $this->twosComplement($aBin);
+        }
+        if ($bNeg) {
+            $bBin = $this->twosComplement($bBin);
+        }
+
+        switch ($operator) {
+            case 'and':
+                $value = $aBin & $bBin;
+                $negative = ($aNeg and $bNeg);
+                break;
+
+            case 'or':
+                $value = $aBin | $bBin;
+                $negative = ($aNeg or $bNeg);
+                break;
+
+            case 'xor':
+                $value = $aBin ^ $bBin;
+                $negative = ($aNeg xor $bNeg);
+                break;
+
+            // @codeCoverageIgnoreStart
+            default:
+                throw new \InvalidArgumentException('Invalid bitwise operator.');
+            // @codeCoverageIgnoreEnd
+        }
+
+        if ($negative) {
+            $value = $this->twosComplement($value);
+        }
+
+        $result = $this->toDecimal($value);
+
+        return $negative ? $this->neg($result) : $result;
+    }
+
+    /**
+     * @param string $number A positive, binary number.
+     *
+     * @return string
+     */
+    private function twosComplement(string $number) : string
+    {
+        $xor = \str_repeat("\xff", \strlen($number));
+
+        $number = $number ^ $xor;
+
+        for ($i = \strlen($number) - 1; $i >= 0; $i--) {
+            $byte = \ord($number[$i]);
+
+            if (++$byte !== 256) {
+                $number[$i] = \chr($byte);
+                break;
+            }
+
+            $number[$i] = \chr(0);
+        }
+
+        return $number;
+    }
+
+    /**
+     * Converts a decimal number to a binary string.
+     *
+     * @param string $number The number to convert, positive or zero, only digits.
+     *
+     * @return string
+     */
+    private function toBinary(string $number) : string
+    {
+        $result = '';
+
+        while ($number !== '0') {
+            [$number, $remainder] = $this->divQR($number, '256');
+            $result .= \chr((int) $remainder);
+        }
+
+        return \strrev($result);
+    }
+
+    /**
+     * Returns the positive decimal representation of a binary number.
+     *
+     * @param string $bytes The bytes representing the number.
+     *
+     * @return string
+     */
+    private function toDecimal(string $bytes) : string
+    {
+        $result = '0';
+        $power = '1';
+
+        for ($i = \strlen($bytes) - 1; $i >= 0; $i--) {
+            $index = \ord($bytes[$i]);
+
+            if ($index !== 0) {
+                $result = $this->add($result, ($index === 1)
+                    ? $power
+                    : $this->mul($power, (string) $index)
+                );
+            }
+
+            if ($i !== 0) {
+                $power = $this->mul($power, '256');
+            }
+        }
+
+        return $result;
+    }
+}

vendor/brick/math/src/Internal/Calculator/BcMathCalculator.php

@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Internal\Calculator;
+
+use Brick\Math\Internal\Calculator;
+
+/**
+ * Calculator implementation built around the bcmath library.
+ *
+ * @internal
+ *
+ * @psalm-immutable
+ */
+class BcMathCalculator extends Calculator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function add(string $a, string $b) : string
+    {
+        return \bcadd($a, $b, 0);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function sub(string $a, string $b) : string
+    {
+        return \bcsub($a, $b, 0);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function mul(string $a, string $b) : string
+    {
+        return \bcmul($a, $b, 0);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divQ(string $a, string $b) : string
+    {
+        return \bcdiv($a, $b, 0);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divR(string $a, string $b) : string
+    {
+        return \bcmod($a, $b);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divQR(string $a, string $b) : array
+    {
+        $q = \bcdiv($a, $b, 0);
+        $r = \bcmod($a, $b);
+
+        return [$q, $r];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function pow(string $a, int $e) : string
+    {
+        return \bcpow($a, (string) $e, 0);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function powmod(string $base, string $exp, string $mod) : string
+    {
+        return \bcpowmod($base, $exp, $mod, 0);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function sqrt(string $n) : string
+    {
+        return \bcsqrt($n, 0);
+    }
+}

vendor/brick/math/src/Internal/Calculator/GmpCalculator.php

@@ -0,0 +1,142 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Internal\Calculator;
+
+use Brick\Math\Internal\Calculator;
+
+/**
+ * Calculator implementation built around the GMP library.
+ *
+ * @internal
+ *
+ * @psalm-immutable
+ */
+class GmpCalculator extends Calculator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function add(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_add($a, $b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function sub(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_sub($a, $b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function mul(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_mul($a, $b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divQ(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_div_q($a, $b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divR(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_div_r($a, $b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divQR(string $a, string $b) : array
+    {
+        [$q, $r] = \gmp_div_qr($a, $b);
+
+        return [
+            \gmp_strval($q),
+            \gmp_strval($r)
+        ];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function pow(string $a, int $e) : string
+    {
+        return \gmp_strval(\gmp_pow($a, $e));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function powmod(string $base, string $exp, string $mod) : string
+    {
+        return \gmp_strval(\gmp_powm($base, $exp, $mod));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function gcd(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_gcd($a, $b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function fromBase(string $number, int $base) : string
+    {
+        return \gmp_strval(\gmp_init($number, $base));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function toBase(string $number, int $base) : string
+    {
+        return \gmp_strval($number, $base);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function and(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_and($a, $b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function or(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_or($a, $b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function xor(string $a, string $b) : string
+    {
+        return \gmp_strval(\gmp_xor($a, $b));
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function sqrt(string $n) : string
+    {
+        return \gmp_strval(\gmp_sqrt($n));
+    }
+}

vendor/brick/math/src/Internal/Calculator/NativeCalculator.php

@@ -0,0 +1,616 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math\Internal\Calculator;
+
+use Brick\Math\Internal\Calculator;
+
+/**
+ * Calculator implementation using only native PHP code.
+ *
+ * @internal
+ *
+ * @psalm-immutable
+ */
+class NativeCalculator extends Calculator
+{
+    /**
+     * The max number of digits the platform can natively add, subtract, multiply or divide without overflow.
+     * For multiplication, this represents the max sum of the lengths of both operands.
+     *
+     * For addition, it is assumed that an extra digit can hold a carry (1) without overflowing.
+     * Example: 32-bit: max number 1,999,999,999 (9 digits + carry)
+     *          64-bit: max number 1,999,999,999,999,999,999 (18 digits + carry)
+     *
+     * @var int
+     */
+    private $maxDigits;
+
+    /**
+     * Class constructor.
+     *
+     * @codeCoverageIgnore
+     */
+    public function __construct()
+    {
+        switch (PHP_INT_SIZE) {
+            case 4:
+                $this->maxDigits = 9;
+                break;
+
+            case 8:
+                $this->maxDigits = 18;
+                break;
+
+            default:
+                throw new \RuntimeException('The platform is not 32-bit or 64-bit as expected.');
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function add(string $a, string $b) : string
+    {
+        $result = $a + $b;
+
+        if (is_int($result)) {
+            return (string) $result;
+        }
+
+        if ($a === '0') {
+            return $b;
+        }
+
+        if ($b === '0') {
+            return $a;
+        }
+
+        [$aNeg, $bNeg, $aDig, $bDig] = $this->init($a, $b);
+
+        if ($aNeg === $bNeg) {
+            $result = $this->doAdd($aDig, $bDig);
+        } else {
+            $result = $this->doSub($aDig, $bDig);
+        }
+
+        if ($aNeg) {
+            $result = $this->neg($result);
+        }
+
+        return $result;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function sub(string $a, string $b) : string
+    {
+        return $this->add($a, $this->neg($b));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function mul(string $a, string $b) : string
+    {
+        $result = $a * $b;
+
+        if (is_int($result)) {
+            return (string) $result;
+        }
+
+        if ($a === '0' || $b === '0') {
+            return '0';
+        }
+
+        if ($a === '1') {
+            return $b;
+        }
+
+        if ($b === '1') {
+            return $a;
+        }
+
+        if ($a === '-1') {
+            return $this->neg($b);
+        }
+
+        if ($b === '-1') {
+            return $this->neg($a);
+        }
+
+        [$aNeg, $bNeg, $aDig, $bDig] = $this->init($a, $b);
+
+        $result = $this->doMul($aDig, $bDig);
+
+        if ($aNeg !== $bNeg) {
+            $result = $this->neg($result);
+        }
+
+        return $result;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divQ(string $a, string $b) : string
+    {
+        return $this->divQR($a, $b)[0];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divR(string $a, string $b): string
+    {
+        return $this->divQR($a, $b)[1];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function divQR(string $a, string $b) : array
+    {
+        if ($a === '0') {
+            return ['0', '0'];
+        }
+
+        if ($a === $b) {
+            return ['1', '0'];
+        }
+
+        if ($b === '1') {
+            return [$a, '0'];
+        }
+
+        if ($b === '-1') {
+            return [$this->neg($a), '0'];
+        }
+
+        $na = $a * 1; // cast to number
+
+        if (is_int($na)) {
+            $nb = $b * 1;
+
+            if (is_int($nb)) {
+                // the only division that may overflow is PHP_INT_MIN / -1,
+                // which cannot happen here as we've already handled a divisor of -1 above.
+                $r = $na % $nb;
+                $q = ($na - $r) / $nb;
+
+                assert(is_int($q));
+
+                return [
+                    (string) $q,
+                    (string) $r
+                ];
+            }
+        }
+
+        [$aNeg, $bNeg, $aDig, $bDig] = $this->init($a, $b);
+
+        [$q, $r] = $this->doDiv($aDig, $bDig);
+
+        if ($aNeg !== $bNeg) {
+            $q = $this->neg($q);
+        }
+
+        if ($aNeg) {
+            $r = $this->neg($r);
+        }
+
+        return [$q, $r];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function pow(string $a, int $e) : string
+    {
+        if ($e === 0) {
+            return '1';
+        }
+
+        if ($e === 1) {
+            return $a;
+        }
+
+        $odd = $e % 2;
+        $e -= $odd;
+
+        $aa = $this->mul($a, $a);
+        $result = $this->pow($aa, $e / 2);
+
+        if ($odd === 1) {
+            $result = $this->mul($result, $a);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Algorithm from: https://www.geeksforgeeks.org/modular-exponentiation-power-in-modular-arithmetic/
+     *
+     * {@inheritdoc}
+     */
+    public function powmod(string $base, string $exp, string $mod) : string
+    {
+        // special case: the algorithm below fails with 0 power 0 mod 1 (returns 1 instead of 0)
+        if ($base === '0' && $exp === '0' && $mod === '1') {
+            return '0';
+        }
+
+        // special case: the algorithm below fails with power 0 mod 1 (returns 1 instead of 0)
+        if ($exp === '0' && $mod === '1') {
+            return '0';
+        }
+
+        $x = $base;
+
+        $res = '1';
+
+        // numbers are positive, so we can use remainder instead of modulo
+        $x = $this->divR($x, $mod);
+
+        while ($exp !== '0') {
+            if (in_array($exp[-1], ['1', '3', '5', '7', '9'])) { // odd
+                $res = $this->divR($this->mul($res, $x), $mod);
+            }
+
+            $exp = $this->divQ($exp, '2');
+            $x = $this->divR($this->mul($x, $x), $mod);
+        }
+
+        return $res;
+    }
+
+    /**
+     * Adapted from https://cp-algorithms.com/num_methods/roots_newton.html
+     *
+     * {@inheritDoc}
+     */
+    public function sqrt(string $n) : string
+    {
+        if ($n === '0') {
+            return '0';
+        }
+
+        // initial approximation
+        $x = \str_repeat('9', \intdiv(\strlen($n), 2) ?: 1);
+
+        $decreased = false;
+
+        for (;;) {
+            $nx = $this->divQ($this->add($x, $this->divQ($n, $x)), '2');
+
+            if ($x === $nx || $this->cmp($nx, $x) > 0 && $decreased) {
+                break;
+            }
+
+            $decreased = $this->cmp($nx, $x) < 0;
+            $x = $nx;
+        }
+
+        return $x;
+    }
+
+    /**
+     * Performs the addition of two non-signed large integers.
+     *
+     * @param string $a The first operand.
+     * @param string $b The second operand.
+     *
+     * @return string
+     */
+    private function doAdd(string $a, string $b) : string
+    {
+        [$a, $b, $length] = $this->pad($a, $b);
+
+        $carry = 0;
+        $result = '';
+
+        for ($i = $length - $this->maxDigits;; $i -= $this->maxDigits) {
+            $blockLength = $this->maxDigits;
+
+            if ($i < 0) {
+                $blockLength += $i;
+                $i = 0;
+            }
+
+            $blockA = \substr($a, $i, $blockLength);
+            $blockB = \substr($b, $i, $blockLength);
+
+            $sum = (string) ($blockA + $blockB + $carry);
+            $sumLength = \strlen($sum);
+
+            if ($sumLength > $blockLength) {
+                $sum = \substr($sum, 1);
+                $carry = 1;
+            } else {
+                if ($sumLength < $blockLength) {
+                    $sum = \str_repeat('0', $blockLength - $sumLength) . $sum;
+                }
+                $carry = 0;
+            }
+
+            $result = $sum . $result;
+
+            if ($i === 0) {
+                break;
+            }
+        }
+
+        if ($carry === 1) {
+            $result = '1' . $result;
+        }
+
+        return $result;
+    }
+
+    /**
+     * Performs the subtraction of two non-signed large integers.
+     *
+     * @param string $a The first operand.
+     * @param string $b The second operand.
+     *
+     * @return string
+     */
+    private function doSub(string $a, string $b) : string
+    {
+        if ($a === $b) {
+            return '0';
+        }
+
+        // Ensure that we always subtract to a positive result: biggest minus smallest.
+        $cmp = $this->doCmp($a, $b);
+
+        $invert = ($cmp === -1);
+
+        if ($invert) {
+            $c = $a;
+            $a = $b;
+            $b = $c;
+        }
+
+        [$a, $b, $length] = $this->pad($a, $b);
+
+        $carry = 0;
+        $result = '';
+
+        $complement = 10 ** $this->maxDigits;
+
+        for ($i = $length - $this->maxDigits;; $i -= $this->maxDigits) {
+            $blockLength = $this->maxDigits;
+
+            if ($i < 0) {
+                $blockLength += $i;
+                $i = 0;
+            }
+
+            $blockA = \substr($a, $i, $blockLength);
+            $blockB = \substr($b, $i, $blockLength);
+
+            $sum = $blockA - $blockB - $carry;
+
+            if ($sum < 0) {
+                $sum += $complement;
+                $carry = 1;
+            } else {
+                $carry = 0;
+            }
+
+            $sum = (string) $sum;
+            $sumLength = \strlen($sum);
+
+            if ($sumLength < $blockLength) {
+                $sum = \str_repeat('0', $blockLength - $sumLength) . $sum;
+            }
+
+            $result = $sum . $result;
+
+            if ($i === 0) {
+                break;
+            }
+        }
+
+        // Carry cannot be 1 when the loop ends, as a > b
+        assert($carry === 0);
+
+        $result = \ltrim($result, '0');
+
+        if ($invert) {
+            $result = $this->neg($result);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Performs the multiplication of two non-signed large integers.
+     *
+     * @param string $a The first operand.
+     * @param string $b The second operand.
+     *
+     * @return string
+     */
+    private function doMul(string $a, string $b) : string
+    {
+        $x = \strlen($a);
+        $y = \strlen($b);
+
+        $maxDigits = \intdiv($this->maxDigits, 2);
+        $complement = 10 ** $maxDigits;
+
+        $result = '0';
+
+        for ($i = $x - $maxDigits;; $i -= $maxDigits) {
+            $blockALength = $maxDigits;
+
+            if ($i < 0) {
+                $blockALength += $i;
+                $i = 0;
+            }
+
+            $blockA = (int) \substr($a, $i, $blockALength);
+
+            $line = '';
+            $carry = 0;
+
+            for ($j = $y - $maxDigits;; $j -= $maxDigits) {
+                $blockBLength = $maxDigits;
+
+                if ($j < 0) {
+                    $blockBLength += $j;
+                    $j = 0;
+                }
+
+                $blockB = (int) \substr($b, $j, $blockBLength);
+
+                $mul = $blockA * $blockB + $carry;
+                $value = $mul % $complement;
+                $carry = ($mul - $value) / $complement;
+
+                $value = (string) $value;
+                $value = \str_pad($value, $maxDigits, '0', STR_PAD_LEFT);
+
+                $line = $value . $line;
+
+                if ($j === 0) {
+                    break;
+                }
+            }
+
+            if ($carry !== 0) {
+                $line = $carry . $line;
+            }
+
+            $line = \ltrim($line, '0');
+
+            if ($line !== '') {
+                $line .= \str_repeat('0', $x - $blockALength - $i);
+                $result = $this->add($result, $line);
+            }
+
+            if ($i === 0) {
+                break;
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * Performs the division of two non-signed large integers.
+     *
+     * @param string $a The first operand.
+     * @param string $b The second operand.
+     *
+     * @return string[] The quotient and remainder.
+     */
+    private function doDiv(string $a, string $b) : array
+    {
+        $cmp = $this->doCmp($a, $b);
+
+        if ($cmp === -1) {
+            return ['0', $a];
+        }
+
+        $x = \strlen($a);
+        $y = \strlen($b);
+
+        // we now know that a >= b && x >= y
+
+        $q = '0'; // quotient
+        $r = $a; // remainder
+        $z = $y; // focus length, always $y or $y+1
+
+        for (;;) {
+            $focus = \substr($a, 0, $z);
+
+            $cmp = $this->doCmp($focus, $b);
+
+            if ($cmp === -1) {
+                if ($z === $x) { // remainder < dividend
+                    break;
+                }
+
+                $z++;
+            }
+
+            $zeros = \str_repeat('0', $x - $z);
+
+            $q = $this->add($q, '1' . $zeros);
+            $a = $this->sub($a, $b . $zeros);
+
+            $r = $a;
+
+            if ($r === '0') { // remainder == 0
+                break;
+            }
+
+            $x = \strlen($a);
+
+            if ($x < $y) { // remainder < dividend
+                break;
+            }
+
+            $z = $y;
+        }
+
+        return [$q, $r];
+    }
+
+    /**
+     * Compares two non-signed large numbers.
+     *
+     * @param string $a The first operand.
+     * @param string $b The second operand.
+     *
+     * @return int [-1, 0, 1]
+     */
+    private function doCmp(string $a, string $b) : int
+    {
+        $x = \strlen($a);
+        $y = \strlen($b);
+
+        $cmp = $x <=> $y;
+
+        if ($cmp !== 0) {
+            return $cmp;
+        }
+
+        return \strcmp($a, $b) <=> 0; // enforce [-1, 0, 1]
+    }
+
+    /**
+     * Pads the left of one of the given numbers with zeros if necessary to make both numbers the same length.
+     *
+     * The numbers must only consist of digits, without leading minus sign.
+     *
+     * @param string $a The first operand.
+     * @param string $b The second operand.
+     *
+     * @return array{0: string, 1: string, 2: int}
+     */
+    private function pad(string $a, string $b) : array
+    {
+        $x = \strlen($a);
+        $y = \strlen($b);
+
+        if ($x > $y) {
+            $b = \str_repeat('0', $x - $y) . $b;
+
+            return [$a, $b, $x];
+        }
+
+        if ($x < $y) {
+            $a = \str_repeat('0', $y - $x) . $a;
+
+            return [$a, $b, $y];
+        }
+
+        return [$a, $b, $x];
+    }
+}

vendor/brick/math/src/RoundingMode.php

@@ -0,0 +1,107 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Brick\Math;
+
+/**
+ * Specifies a rounding behavior for numerical operations capable of discarding precision.
+ *
+ * Each rounding mode indicates how the least significant returned digit of a rounded result
+ * is to be calculated. If fewer digits are returned than the digits needed to represent the
+ * exact numerical result, the discarded digits will be referred to as the discarded fraction
+ * regardless the digits' contribution to the value of the number. In other words, considered
+ * as a numerical value, the discarded fraction could have an absolute value greater than one.
+ */
+final class RoundingMode
+{
+    /**
+     * Private constructor. This class is not instantiable.
+     *
+     * @codeCoverageIgnore
+     */
+    private function __construct()
+    {
+    }
+
+    /**
+     * Asserts that the requested operation has an exact result, hence no rounding is necessary.
+     *
+     * If this rounding mode is specified on an operation that yields a result that
+     * cannot be represented at the requested scale, a RoundingNecessaryException is thrown.
+     */
+    public const UNNECESSARY = 0;
+
+    /**
+     * Rounds away from zero.
+     *
+     * Always increments the digit prior to a nonzero discarded fraction.
+     * Note that this rounding mode never decreases the magnitude of the calculated value.
+     */
+    public const UP = 1;
+
+    /**
+     * Rounds towards zero.
+     *
+     * Never increments the digit prior to a discarded fraction (i.e., truncates).
+     * Note that this rounding mode never increases the magnitude of the calculated value.
+     */
+    public const DOWN = 2;
+
+    /**
+     * Rounds towards positive infinity.
+     *
+     * If the result is positive, behaves as for UP; if negative, behaves as for DOWN.
+     * Note that this rounding mode never decreases the calculated value.
+     */
+    public const CEILING = 3;
+
+    /**
+     * Rounds towards negative infinity.
+     *
+     * If the result is positive, behave as for DOWN; if negative, behave as for UP.
+     * Note that this rounding mode never increases the calculated value.
+     */
+    public const FLOOR = 4;
+
+    /**
+     * Rounds towards "nearest neighbor" unless both neighbors are equidistant, in which case round up.
+     *
+     * Behaves as for UP if the discarded fraction is >= 0.5; otherwise, behaves as for DOWN.
+     * Note that this is the rounding mode commonly taught at school.
+     */
+    public const HALF_UP = 5;
+
+    /**
+     * Rounds towards "nearest neighbor" unless both neighbors are equidistant, in which case round down.
+     *
+     * Behaves as for UP if the discarded fraction is > 0.5; otherwise, behaves as for DOWN.
+     */
+    public const HALF_DOWN = 6;
+
+    /**
+     * Rounds towards "nearest neighbor" unless both neighbors are equidistant, in which case round towards positive infinity.
+     *
+     * If the result is positive, behaves as for HALF_UP; if negative, behaves as for HALF_DOWN.
+     */
+    public const HALF_CEILING = 7;
+
+    /**
+     * Rounds towards "nearest neighbor" unless both neighbors are equidistant, in which case round towards negative infinity.
+     *
+     * If the result is positive, behaves as for HALF_DOWN; if negative, behaves as for HALF_UP.
+     */
+    public const HALF_FLOOR = 8;
+
+    /**
+     * Rounds towards the "nearest neighbor" unless both neighbors are equidistant, in which case rounds towards the even neighbor.
+     *
+     * Behaves as for HALF_UP if the digit to the left of the discarded fraction is odd;
+     * behaves as for HALF_DOWN if it's even.
+     *
+     * Note that this is the rounding mode that statistically minimizes
+     * cumulative error when applied repeatedly over a sequence of calculations.
+     * It is sometimes known as "Banker's rounding", and is chiefly used in the USA.
+     */
+    public const HALF_EVEN = 9;
+}

vendor/composer/ClassLoader.php

@@ -0,0 +1,445 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Autoload;
+
+/**
+ * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
+ *
+ *     $loader = new \Composer\Autoload\ClassLoader();
+ *
+ *     // register classes with namespaces
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
+ *     $loader->add('Symfony',           __DIR__.'/framework');
+ *
+ *     // activate the autoloader
+ *     $loader->register();
+ *
+ *     // to enable searching the include path (eg. for PEAR packages)
+ *     $loader->setUseIncludePath(true);
+ *
+ * In this example, if you try to use a class in the Symfony\Component
+ * namespace or one of its children (Symfony\Component\Console for instance),
+ * the autoloader will first look for the class under the component/
+ * directory, and it will then fallback to the framework/ directory if not
+ * found before giving up.
+ *
+ * This class is loosely based on the Symfony UniversalClassLoader.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ * @see    http://www.php-fig.org/psr/psr-0/
+ * @see    http://www.php-fig.org/psr/psr-4/
+ */
+class ClassLoader
+{
+    // PSR-4
+    private $prefixLengthsPsr4 = array();
+    private $prefixDirsPsr4 = array();
+    private $fallbackDirsPsr4 = array();
+
+    // PSR-0
+    private $prefixesPsr0 = array();
+    private $fallbackDirsPsr0 = array();
+
+    private $useIncludePath = false;
+    private $classMap = array();
+    private $classMapAuthoritative = false;
+    private $missingClasses = array();
+    private $apcuPrefix;
+
+    public function getPrefixes()
+    {
+        if (!empty($this->prefixesPsr0)) {
+            return call_user_func_array('array_merge', array_values($this->prefixesPsr0));
+        }
+
+        return array();
+    }
+
+    public function getPrefixesPsr4()
+    {
+        return $this->prefixDirsPsr4;
+    }
+
+    public function getFallbackDirs()
+    {
+        return $this->fallbackDirsPsr0;
+    }
+
+    public function getFallbackDirsPsr4()
+    {
+        return $this->fallbackDirsPsr4;
+    }
+
+    public function getClassMap()
+    {
+        return $this->classMap;
+    }
+
+    /**
+     * @param array $classMap Class to filename map
+     */
+    public function addClassMap(array $classMap)
+    {
+        if ($this->classMap) {
+            $this->classMap = array_merge($this->classMap, $classMap);
+        } else {
+            $this->classMap = $classMap;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix, either
+     * appending or prepending to the ones previously set for this prefix.
+     *
+     * @param string       $prefix  The prefix
+     * @param array|string $paths   The PSR-0 root directories
+     * @param bool         $prepend Whether to prepend the directories
+     */
+    public function add($prefix, $paths, $prepend = false)
+    {
+        if (!$prefix) {
+            if ($prepend) {
+                $this->fallbackDirsPsr0 = array_merge(
+                    (array) $paths,
+                    $this->fallbackDirsPsr0
+                );
+            } else {
+                $this->fallbackDirsPsr0 = array_merge(
+                    $this->fallbackDirsPsr0,
+                    (array) $paths
+                );
+            }
+
+            return;
+        }
+
+        $first = $prefix[0];
+        if (!isset($this->prefixesPsr0[$first][$prefix])) {
+            $this->prefixesPsr0[$first][$prefix] = (array) $paths;
+
+            return;
+        }
+        if ($prepend) {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                (array) $paths,
+                $this->prefixesPsr0[$first][$prefix]
+            );
+        } else {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                $this->prefixesPsr0[$first][$prefix],
+                (array) $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace, either
+     * appending or prepending to the ones previously set for this namespace.
+     *
+     * @param string       $prefix  The prefix/namespace, with trailing '\\'
+     * @param array|string $paths   The PSR-4 base directories
+     * @param bool         $prepend Whether to prepend the directories
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function addPsr4($prefix, $paths, $prepend = false)
+    {
+        if (!$prefix) {
+            // Register directories for the root namespace.
+            if ($prepend) {
+                $this->fallbackDirsPsr4 = array_merge(
+                    (array) $paths,
+                    $this->fallbackDirsPsr4
+                );
+            } else {
+                $this->fallbackDirsPsr4 = array_merge(
+                    $this->fallbackDirsPsr4,
+                    (array) $paths
+                );
+            }
+        } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
+            // Register directories for a new namespace.
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        } elseif ($prepend) {
+            // Prepend directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                (array) $paths,
+                $this->prefixDirsPsr4[$prefix]
+            );
+        } else {
+            // Append directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                $this->prefixDirsPsr4[$prefix],
+                (array) $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix,
+     * replacing any others previously set for this prefix.
+     *
+     * @param string       $prefix The prefix
+     * @param array|string $paths  The PSR-0 base directories
+     */
+    public function set($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr0 = (array) $paths;
+        } else {
+            $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace,
+     * replacing any others previously set for this namespace.
+     *
+     * @param string       $prefix The prefix/namespace, with trailing '\\'
+     * @param array|string $paths  The PSR-4 base directories
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function setPsr4($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr4 = (array) $paths;
+        } else {
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Turns on searching the include path for class files.
+     *
+     * @param bool $useIncludePath
+     */
+    public function setUseIncludePath($useIncludePath)
+    {
+        $this->useIncludePath = $useIncludePath;
+    }
+
+    /**
+     * Can be used to check if the autoloader uses the include path to check
+     * for classes.
+     *
+     * @return bool
+     */
+    public function getUseIncludePath()
+    {
+        return $this->useIncludePath;
+    }
+
+    /**
+     * Turns off searching the prefix and fallback directories for classes
+     * that have not been registered with the class map.
+     *
+     * @param bool $classMapAuthoritative
+     */
+    public function setClassMapAuthoritative($classMapAuthoritative)
+    {
+        $this->classMapAuthoritative = $classMapAuthoritative;
+    }
+
+    /**
+     * Should class lookup fail if not found in the current class map?
+     *
+     * @return bool
+     */
+    public function isClassMapAuthoritative()
+    {
+        return $this->classMapAuthoritative;
+    }
+
+    /**
+     * APCu prefix to use to cache found/not-found classes, if the extension is enabled.
+     *
+     * @param string|null $apcuPrefix
+     */
+    public function setApcuPrefix($apcuPrefix)
+    {
+        $this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null;
+    }
+
+    /**
+     * The APCu prefix in use, or null if APCu caching is not enabled.
+     *
+     * @return string|null
+     */
+    public function getApcuPrefix()
+    {
+        return $this->apcuPrefix;
+    }
+
+    /**
+     * Registers this instance as an autoloader.
+     *
+     * @param bool $prepend Whether to prepend the autoloader or not
+     */
+    public function register($prepend = false)
+    {
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+    }
+
+    /**
+     * Unregisters this instance as an autoloader.
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param  string    $class The name of the class
+     * @return bool|null True if loaded, null otherwise
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            includeFile($file);
+
+            return true;
+        }
+    }
+
+    /**
+     * Finds the path to the file where the class is defined.
+     *
+     * @param string $class The name of the class
+     *
+     * @return string|false The path if found, false otherwise
+     */
+    public function findFile($class)
+    {
+        // class map lookup
+        if (isset($this->classMap[$class])) {
+            return $this->classMap[$class];
+        }
+        if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
+            return false;
+        }
+        if (null !== $this->apcuPrefix) {
+            $file = apcu_fetch($this->apcuPrefix.$class, $hit);
+            if ($hit) {
+                return $file;
+            }
+        }
+
+        $file = $this->findFileWithExtension($class, '.php');
+
+        // Search for Hack files if we are running on HHVM
+        if (false === $file && defined('HHVM_VERSION')) {
+            $file = $this->findFileWithExtension($class, '.hh');
+        }
+
+        if (null !== $this->apcuPrefix) {
+            apcu_add($this->apcuPrefix.$class, $file);
+        }
+
+        if (false === $file) {
+            // Remember that this class does not exist.
+            $this->missingClasses[$class] = true;
+        }
+
+        return $file;
+    }
+
+    private function findFileWithExtension($class, $ext)
+    {
+        // PSR-4 lookup
+        $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
+
+        $first = $class[0];
+        if (isset($this->prefixLengthsPsr4[$first])) {
+            $subPath = $class;
+            while (false !== $lastPos = strrpos($subPath, '\\')) {
+                $subPath = substr($subPath, 0, $lastPos);
+                $search = $subPath . '\\';
+                if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
+                    foreach ($this->prefixDirsPsr4[$search] as $dir) {
+                        if (file_exists($file = $dir . $pathEnd)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-4 fallback dirs
+        foreach ($this->fallbackDirsPsr4 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 lookup
+        if (false !== $pos = strrpos($class, '\\')) {
+            // namespaced class name
+            $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
+                . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
+        } else {
+            // PEAR-like class name
+            $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
+        }
+
+        if (isset($this->prefixesPsr0[$first])) {
+            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
+                if (0 === strpos($class, $prefix)) {
+                    foreach ($dirs as $dir) {
+                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-0 fallback dirs
+        foreach ($this->fallbackDirsPsr0 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 include paths.
+        if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
+            return $file;
+        }
+
+        return false;
+    }
+}
+
+/**
+ * Scope isolated include.
+ *
+ * Prevents access to $this/self from included files.
+ */
+function includeFile($file)
+{
+    include $file;
+}

vendor/composer/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) Nils Adermann, Jordi Boggiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/composer/autoload_files.php

@@ -0,0 +1,28 @@
+<?php
+
+// autoload_files.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    '7e9bd612cc444b3eed788ebbe46263a0' => $vendorDir . '/laminas/laminas-zendframework-bridge/src/autoload.php',
+    '78d47739fff607f33066e6259f091845' => $vendorDir . '/laminas/laminas-cache/autoload/patternPluginManagerPolyfill.php',
+    '383eaff206634a77a1be54e64e6459c7' => $vendorDir . '/sabre/uri/lib/functions.php',
+    '2b9d0f43f9552984cfa82fee95491826' => $vendorDir . '/sabre/event/lib/coroutine.php',
+    'd81bab31d3feb45bfe2f283ea3c8fdf7' => $vendorDir . '/sabre/event/lib/Loop/functions.php',
+    'a1cce3d26cc15c00fcd0b3354bd72c88' => $vendorDir . '/sabre/event/lib/Promise/functions.php',
+    '3569eecfeed3bcf0bad3c998a494ecb8' => $vendorDir . '/sabre/xml/lib/Deserializer/functions.php',
+    '93aa591bc4ca510c520999e34229ee79' => $vendorDir . '/sabre/xml/lib/Serializer/functions.php',
+    '7b11c4dc42b3b3023073cb14e519683c' => $vendorDir . '/ralouphie/getallheaders/src/getallheaders.php',
+    'c964ee0ededf28c96ebd9db5099ef910' => $vendorDir . '/guzzlehttp/promises/src/functions_include.php',
+    'a0edc8309cc5e1d60e3047b5df6b7052' => $vendorDir . '/guzzlehttp/psr7/src/functions_include.php',
+    'ebdb698ed4152ae445614b69b5e4bb6a' => $vendorDir . '/sabre/http/lib/functions.php',
+    '0d59ee240a4cd96ddbb4ff164fccea4d' => $vendorDir . '/symfony/polyfill-php73/bootstrap.php',
+    'a4a119a56e50fbb293281d9a48007e0e' => $vendorDir . '/symfony/polyfill-php80/bootstrap.php',
+    '37a3dc5111fe8f707ab4c132ef1dbc62' => $vendorDir . '/guzzlehttp/guzzle/src/functions_include.php',
+    'ef836782e1b8d747e78815386b148139' => $vendorDir . '/htmlawed/htmlawed/htmLawed.php',
+    'fe735e1c17efbbf6962819fa4f3f0701' => $vendorDir . '/iamcal/lib_autolink/lib_autolink.php',
+    '3109cb1a231dcd04bee1f9f620d46975' => $vendorDir . '/paragonie/sodium_compat/autoload.php',
+    'e39a8b23c42d4e1452234d762b03835a' => $vendorDir . '/ramsey/uuid/src/functions.php',
+);

vendor/composer/autoload_namespaces.php

@@ -0,0 +1,10 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'SimplePie' => array($vendorDir . '/simplepie/simplepie/library'),
+);

vendor/composer/autoload_psr4.php

@@ -0,0 +1,54 @@
+<?php
+
+// autoload_psr4.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'wapmorgan\\UnifiedArchive\\' => array($vendorDir . '/wapmorgan/unified-archive/src'),
+    'TrueBV\\' => array($vendorDir . '/true/punycode/src'),
+    'Symfony\\Polyfill\\Php80\\' => array($vendorDir . '/symfony/polyfill-php80'),
+    'Symfony\\Polyfill\\Php73\\' => array($vendorDir . '/symfony/polyfill-php73'),
+    'Symfony\\Contracts\\Service\\' => array($vendorDir . '/symfony/service-contracts'),
+    'Symfony\\Component\\Console\\' => array($vendorDir . '/symfony/console'),
+    'ScssPhp\\ScssPhp\\' => array($vendorDir . '/scssphp/scssphp/src'),
+    'Sabre\\Xml\\' => array($vendorDir . '/sabre/xml/lib'),
+    'Sabre\\VObject\\' => array($vendorDir . '/sabre/vobject/lib'),
+    'Sabre\\Uri\\' => array($vendorDir . '/sabre/uri/lib'),
+    'Sabre\\HTTP\\' => array($vendorDir . '/sabre/http/lib'),
+    'Sabre\\Event\\' => array($vendorDir . '/sabre/event/lib'),
+    'Sabre\\DAV\\' => array($vendorDir . '/sabre/dav/lib/DAV'),
+    'Sabre\\DAVACL\\' => array($vendorDir . '/sabre/dav/lib/DAVACL'),
+    'Sabre\\CardDAV\\' => array($vendorDir . '/sabre/dav/lib/CardDAV'),
+    'Sabre\\CalDAV\\' => array($vendorDir . '/sabre/dav/lib/CalDAV'),
+    'Ramsey\\Uuid\\' => array($vendorDir . '/ramsey/uuid/src'),
+    'Ramsey\\Collection\\' => array($vendorDir . '/ramsey/collection/src'),
+    'RRule\\' => array($vendorDir . '/rlanvin/php-rrule/src'),
+    'Psr\\SimpleCache\\' => array($vendorDir . '/psr/simple-cache/src'),
+    'Psr\\Log\\' => array($vendorDir . '/psr/log/Psr/Log'),
+    'Psr\\Http\\Message\\' => array($vendorDir . '/psr/http-message/src'),
+    'Psr\\Container\\' => array($vendorDir . '/psr/container/src'),
+    'Psr\\Cache\\' => array($vendorDir . '/psr/cache/src'),
+    'PHPMailer\\PHPMailer\\' => array($vendorDir . '/phpmailer/phpmailer/src'),
+    'Monolog\\' => array($vendorDir . '/monolog/monolog/src/Monolog'),
+    'Michelf\\' => array($vendorDir . '/michelf/php-markdown/Michelf'),
+    'LitEmoji\\' => array($vendorDir . '/elvanto/litemoji/src'),
+    'Laminas\\ZendFrameworkBridge\\' => array($vendorDir . '/laminas/laminas-zendframework-bridge/src'),
+    'Laminas\\Validator\\' => array($vendorDir . '/laminas/laminas-validator/src'),
+    'Laminas\\Stdlib\\' => array($vendorDir . '/laminas/laminas-stdlib/src'),
+    'Laminas\\ServiceManager\\' => array($vendorDir . '/laminas/laminas-servicemanager/src'),
+    'Laminas\\Serializer\\' => array($vendorDir . '/laminas/laminas-serializer/src'),
+    'Laminas\\Mime\\' => array($vendorDir . '/laminas/laminas-mime/src'),
+    'Laminas\\Mail\\' => array($vendorDir . '/laminas/laminas-mail/src'),
+    'Laminas\\Loader\\' => array($vendorDir . '/laminas/laminas-loader/src'),
+    'Laminas\\Json\\' => array($vendorDir . '/laminas/laminas-json/src'),
+    'Laminas\\I18n\\' => array($vendorDir . '/laminas/laminas-i18n/src'),
+    'Laminas\\EventManager\\' => array($vendorDir . '/laminas/laminas-eventmanager/src'),
+    'Laminas\\Cache\\' => array($vendorDir . '/laminas/laminas-cache/src'),
+    'Interop\\Container\\' => array($vendorDir . '/container-interop/container-interop/src/Interop/Container'),
+    'GuzzleHttp\\Psr7\\' => array($vendorDir . '/guzzlehttp/psr7/src'),
+    'GuzzleHttp\\Promise\\' => array($vendorDir . '/guzzlehttp/promises/src'),
+    'GuzzleHttp\\' => array($vendorDir . '/guzzlehttp/guzzle/src'),
+    'Brick\\Math\\' => array($vendorDir . '/brick/math/src'),
+);

vendor/composer/autoload_real.php

@@ -0,0 +1,73 @@
+<?php
+
+// autoload_real.php @generated by Composer
+
+class ComposerAutoloaderInit6882c6981c649052754140f42b94e11f
+{
+    private static $loader;
+
+    public static function loadClassLoader($class)
+    {
+        if ('Composer\Autoload\ClassLoader' === $class) {
+            require __DIR__ . '/ClassLoader.php';
+        }
+    }
+
+    /**
+     * @return \Composer\Autoload\ClassLoader
+     */
+    public static function getLoader()
+    {
+        if (null !== self::$loader) {
+            return self::$loader;
+        }
+
+        spl_autoload_register(array('ComposerAutoloaderInit6882c6981c649052754140f42b94e11f', 'loadClassLoader'), true, true);
+        self::$loader = $loader = new \Composer\Autoload\ClassLoader();
+        spl_autoload_unregister(array('ComposerAutoloaderInit6882c6981c649052754140f42b94e11f', 'loadClassLoader'));
+
+        $useStaticLoader = PHP_VERSION_ID >= 50600 && !defined('HHVM_VERSION') && (!function_exists('zend_loader_file_encoded') || !zend_loader_file_encoded());
+        if ($useStaticLoader) {
+            require_once __DIR__ . '/autoload_static.php';
+
+            call_user_func(\Composer\Autoload\ComposerStaticInit6882c6981c649052754140f42b94e11f::getInitializer($loader));
+        } else {
+            $map = require __DIR__ . '/autoload_namespaces.php';
+            foreach ($map as $namespace => $path) {
+                $loader->set($namespace, $path);
+            }
+
+            $map = require __DIR__ . '/autoload_psr4.php';
+            foreach ($map as $namespace => $path) {
+                $loader->setPsr4($namespace, $path);
+            }
+
+            $classMap = require __DIR__ . '/autoload_classmap.php';
+            if ($classMap) {
+                $loader->addClassMap($classMap);
+            }
+        }
+
+        $loader->register(true);
+
+        if ($useStaticLoader) {
+            $includeFiles = Composer\Autoload\ComposerStaticInit6882c6981c649052754140f42b94e11f::$files;
+        } else {
+            $includeFiles = require __DIR__ . '/autoload_files.php';
+        }
+        foreach ($includeFiles as $fileIdentifier => $file) {
+            composerRequire6882c6981c649052754140f42b94e11f($fileIdentifier, $file);
+        }
+
+        return $loader;
+    }
+}
+
+function composerRequire6882c6981c649052754140f42b94e11f($fileIdentifier, $file)
+{
+    if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
+        require $file;
+
+        $GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
+    }
+}

vendor/container-interop/container-interop/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 container-interop
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/container-interop/container-interop/src/Interop/Container/ContainerInterface.php

@@ -0,0 +1,15 @@
+<?php
+/**
+ * @license http://www.opensource.org/licenses/mit-license.php MIT (see the LICENSE file)
+ */
+
+namespace Interop\Container;
+
+use Psr\Container\ContainerInterface as PsrContainerInterface;
+
+/**
+ * Describes the interface of a container that exposes methods to read its entries.
+ */
+interface ContainerInterface extends PsrContainerInterface
+{
+}

vendor/container-interop/container-interop/src/Interop/Container/Exception/ContainerException.php

@@ -0,0 +1,15 @@
+<?php
+/**
+ * @license http://www.opensource.org/licenses/mit-license.php MIT (see the LICENSE file)
+ */
+
+namespace Interop\Container\Exception;
+
+use Psr\Container\ContainerExceptionInterface as PsrContainerException;
+
+/**
+ * Base interface representing a generic exception in a container.
+ */
+interface ContainerException extends PsrContainerException
+{
+}

vendor/container-interop/container-interop/src/Interop/Container/Exception/NotFoundException.php

@@ -0,0 +1,15 @@
+<?php
+/**
+ * @license http://www.opensource.org/licenses/mit-license.php MIT (see the LICENSE file)
+ */
+
+namespace Interop\Container\Exception;
+
+use Psr\Container\NotFoundExceptionInterface as PsrNotFoundException;
+
+/**
+ * No entry was found in the container.
+ */
+interface NotFoundException extends ContainerException, PsrNotFoundException
+{
+}

vendor/elvanto/litemoji/LICENSE

@@ -0,0 +1,19 @@
+Copyright (C) Elvanto Pty Ltd <developers@elvanto.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/elvanto/litemoji/bin/generate-shortcodes-array.php

@@ -0,0 +1,29 @@
+#!/usr/bin/env php
+<?php
+
+function normalizeShortcode($shortcode) {
+    return str_replace('-', '_', strtolower($shortcode));
+}
+
+$data = json_decode(file_get_contents(__DIR__ . '/../vendor/milesj/emojibase/packages/data/en/raw.json'), true);
+$emoji_array = require(__DIR__ . '/../src/shortcodes-array.php');
+$existing_shortcodes = array_map('normalizeShortcode', array_keys($emoji_array));
+
+foreach ($data as $emoji) {
+    foreach ($emoji['shortcodes'] as $shortcode) {
+
+        if (in_array(normalizeShortcode($shortcode), $existing_shortcodes)) {
+            continue;
+        }
+
+        $emoji_array[ (string) $shortcode] = $emoji['hexcode'];
+    }
+}
+
+ksort($emoji_array, SORT_NATURAL);
+$output = "<?php\nreturn [\n";
+foreach ($emoji_array as $shortcode => $codepoints) {
+    $output .= "  '$shortcode' => '$codepoints',\n";
+};
+$output .= '];';
+file_put_contents('src/shortcodes-array.php', $output);

vendor/elvanto/litemoji/phpunit.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/5.7/phpunit.xsd"
+         bootstrap="vendor/autoload.php">
+    <testsuite>
+        <directory suffix="Test.php">tests</directory>
+    </testsuite>
+
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">src</directory>
+        </whitelist>
+    </filter>
+</phpunit>

vendor/elvanto/litemoji/src/LitEmoji.php

@@ -0,0 +1,264 @@
+<?php
+
+namespace LitEmoji;
+
+class LitEmoji
+{
+    const MB_REGEX = '/(
+    		     \x23\xE2\x83\xA3               # Digits
+    		     [\x30-\x39]\xE2\x83\xA3
+    		   | \xE2[\x9C-\x9E][\x80-\xBF]     # Dingbats
+    		   | \xF0\x9F[\x85-\x88][\xA6-\xBF] # Enclosed characters
+    		   | \xF0\x9F[\x8C-\x97][\x80-\xBF] # Misc
+    		   | \xF0\x9F\x98[\x80-\xBF]        # Smilies
+    		   | \xF0\x9F\x99[\x80-\x8F]
+    		   | \xF0\x9F\x9A[\x80-\xBF]        # Transport and map symbols
+    		   | \xF0\x9F[\xA4-\xA7][\x80-\xBF] # Supplementary symbols and pictographs
+    		)/x';
+
+    private static $shortcodes = [];
+    private static $shortcodeCodepoints = [];
+    private static $shortcodeEntities = [];
+    private static $entityCodepoints = [];
+    private static $excludedShortcodes = [];
+
+    /**
+     * Converts all unicode emoji and HTML entities to plaintext shortcodes.
+     *
+     * @param string $content
+     * @return string
+     */
+    public static function encodeShortcode($content)
+    {
+        $content = self::entitiesToUnicode($content);
+        $content = self::unicodeToShortcode($content);
+
+        return $content;
+    }
+
+    /**
+     * Converts all plaintext shortcodes and unicode emoji to HTML entities.
+     *
+     * @param string $content
+     * @return string
+     */
+    public static function encodeHtml($content)
+    {
+        $content = self::unicodeToShortcode($content);
+        $content = self::shortcodeToEntities($content);
+
+        return $content;
+    }
+
+    /**
+     * Converts all plaintext shortcodes and HTML entities to unicode codepoints.
+     *
+     * @param string $content
+     * @return string
+     */
+    public static function encodeUnicode($content)
+    {
+        $content = self::shortcodeToUnicode($content);
+        $content = self::entitiesToUnicode($content);
+
+        return $content;
+    }
+
+    /**
+     * Converts plaintext shortcodes to HTML entities.
+     *
+     * @param string $content
+     * @return string
+     */
+    public static function shortcodeToUnicode($content)
+    {
+        $replacements = self::getShortcodeCodepoints();
+        return str_replace(array_keys($replacements), $replacements, $content);
+    }
+
+    /**
+     * Converts HTML entities to unicode codepoints.
+     *
+     * @param string $content
+     * @return string
+     */
+    public static function entitiesToUnicode($content)
+    {
+        /* Convert HTML entities to uppercase hexadecimal */
+        $content = preg_replace_callback('/\&\#(x?[a-zA-Z0-9]*?)\;/', function($matches) {
+            $code = $matches[1];
+
+            if ($code[0] == 'x') {
+                return '&#x' . strtoupper(substr($code, 1)) . ';';
+            }
+
+            return '&#x' . strtoupper(dechex($code)) . ';';
+        }, $content);
+
+        $replacements = self::getEntityCodepoints();
+        return str_replace(array_keys($replacements), $replacements, $content);
+    }
+
+    /**
+     * Converts unicode codepoints to plaintext shortcodes.
+     *
+     * @param string $content
+     * @return string
+     */
+    public static function unicodeToShortcode($content)
+    {
+        $replacement = '';
+        $encoding = mb_detect_encoding($content);
+        $codepoints = array_flip(self::getShortcodes());
+
+        /* Break content along codepoint boundaries */
+        $parts = preg_split(
+            self::MB_REGEX,
+            $content,
+            -1,
+            PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY
+        );
+
+        /* Reconstruct content using shortcodes */
+        $sequence = [];
+        foreach ($parts as $offset => $part) {
+            if (preg_match(self::MB_REGEX, $part)) {
+                $part = mb_convert_encoding($part, 'UTF-32', $encoding);
+                $words = unpack('N*', $part);
+                $codepoint = sprintf('%X', reset($words));
+
+                $sequence[] = $codepoint;
+
+                if (isset($codepoints[$codepoint])) {
+                    $replacement .= ":$codepoints[$codepoint]:";
+                    $sequence = [];
+                } else {
+                    /* Check multi-codepoint sequence */
+                    $multi = implode('-', $sequence);
+
+                    if (isset($codepoints[$multi])) {
+                        $replacement .= ":$codepoints[$multi]:";
+                        $sequence = [];
+                    }
+                }
+            } else {
+                $replacement .= $part;
+            }
+        }
+
+        return $replacement;
+    }
+
+    /**
+     * Converts plain text shortcodes to HTML entities.
+     *
+     * @param string $content
+     * @return string
+     */
+    public static function shortcodeToEntities($content) {
+        $replacements = self::getShortcodeEntities();
+        return str_replace(array_keys($replacements), $replacements, $content);
+    }
+
+    /**
+     * Sets a configuration property.
+     *
+     * @param string $property
+     * @param mixed $value
+     */
+    public static function config($property, $value)
+    {
+        switch ($property) {
+            case 'excludeShortcodes':
+                self::$excludedShortcodes = [];
+
+                if (!is_array($value)) {
+                    $value = [$value];
+                }
+
+                foreach ($value as $code) {
+                    if (is_string($code)) {
+                        self::$excludedShortcodes[] = $code;
+                    }
+                }
+
+                // Invalidate shortcode cache
+                self::$shortcodes = [];
+                break;
+        }
+    }
+
+    private static function getShortcodes()
+    {
+        if (!empty(self::$shortcodes)) {
+            return self::$shortcodes;
+        }
+
+        // Skip excluded shortcodes
+        self::$shortcodes = array_filter(require(__DIR__ . '/shortcodes-array.php'), function($code) {
+            return !in_array($code, self::$excludedShortcodes);
+        }, ARRAY_FILTER_USE_KEY);
+
+        return self::$shortcodes;
+    }
+
+    private static function getShortcodeCodepoints()
+    {
+        if (!empty(self::$shortcodeCodepoints)) {
+            return self::$shortcodeCodepoints;
+        }
+
+        foreach (self::getShortcodes() as $shortcode => $codepoint) {
+            $parts = explode('-', $codepoint);
+            $codepoint = '';
+
+            foreach ($parts as $part) {
+                $codepoint .= mb_convert_encoding(pack('N', hexdec($part)), 'UTF-8', 'UTF-32');
+            }
+
+            self::$shortcodeCodepoints[':' . $shortcode . ':'] = $codepoint;
+        }
+
+        return self::$shortcodeCodepoints;
+    }
+
+    private static function getEntityCodepoints()
+    {
+        if (!empty(self::$entityCodepoints)) {
+            return self::$entityCodepoints;
+        }
+
+        foreach (self::getShortcodes() as $shortcode => $codepoint) {
+            $parts = explode('-', $codepoint);
+            $entity = '';
+            $codepoint = '';
+
+            foreach ($parts as $part) {
+                $entity .= '&#x' . $part . ';';
+                $codepoint .= mb_convert_encoding(pack('N', hexdec($part)), 'UTF-8', 'UTF-32');
+            }
+
+            self::$entityCodepoints[$entity] = $codepoint;
+        }
+
+        return self::$entityCodepoints;
+    }
+
+    private static function getShortcodeEntities()
+    {
+        if (!empty(self::$shortcodeEntities)) {
+            return self::$shortcodeEntities;
+        }
+
+        foreach (self::getShortcodes() as $shortcode => $codepoint) {
+            $parts = explode('-', $codepoint);
+            self::$shortcodeEntities[':' . $shortcode . ':'] = '';
+
+            foreach ($parts as $part) {
+                self::$shortcodeEntities[':' . $shortcode . ':'] .= '&#x' . $part .';';
+            }
+        }
+
+        return self::$shortcodeEntities;
+    }
+}

vendor/guzzlehttp/guzzle/Dockerfile

@@ -0,0 +1,18 @@
+FROM composer:latest as setup
+
+RUN mkdir /guzzle
+
+WORKDIR /guzzle
+
+RUN set -xe \
+    && composer init --name=guzzlehttp/test --description="Simple project for testing Guzzle scripts" --author="Márk Sági-Kazár <mark.sagikazar@gmail.com>" --no-interaction \
+    && composer require guzzlehttp/guzzle
+
+
+FROM php:7.3
+
+RUN mkdir /guzzle
+
+WORKDIR /guzzle
+
+COPY --from=setup /guzzle /guzzle

vendor/guzzlehttp/guzzle/LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2011-2018 Michael Dowling, https://github.com/mtdowling <mtdowling@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.