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185
vendor/sabre/vobject/lib/FreeBusyData.php
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185
vendor/sabre/vobject/lib/FreeBusyData.php
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<?php
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namespace Sabre\VObject;
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/**
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* FreeBusyData is a helper class that manages freebusy information.
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*
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* @copyright Copyright (C) fruux GmbH (https://fruux.com/)
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* @author Evert Pot (http://evertpot.com/)
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* @license http://sabre.io/license/ Modified BSD License
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*/
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class FreeBusyData
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{
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/**
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* Start timestamp.
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*
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* @var int
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*/
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protected $start;
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/**
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* End timestamp.
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*
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* @var int
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*/
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protected $end;
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/**
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* A list of free-busy times.
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*
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* @var array
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*/
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protected $data;
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public function __construct($start, $end)
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{
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$this->start = $start;
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$this->end = $end;
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$this->data = [];
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$this->data[] = [
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'start' => $this->start,
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'end' => $this->end,
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'type' => 'FREE',
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];
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}
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/**
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* Adds free or busytime to the data.
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*
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* @param int $start
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* @param int $end
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* @param string $type FREE, BUSY, BUSY-UNAVAILABLE or BUSY-TENTATIVE
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*/
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public function add($start, $end, $type)
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{
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if ($start > $this->end || $end < $this->start) {
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// This new data is outside our timerange.
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return;
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}
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if ($start < $this->start) {
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// The item starts before our requested time range
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$start = $this->start;
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}
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if ($end > $this->end) {
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// The item ends after our requested time range
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$end = $this->end;
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}
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// Finding out where we need to insert the new item.
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$currentIndex = 0;
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while ($start > $this->data[$currentIndex]['end']) {
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++$currentIndex;
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}
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// The standard insertion point will be one _after_ the first
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// overlapping item.
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$insertStartIndex = $currentIndex + 1;
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$newItem = [
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'start' => $start,
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'end' => $end,
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'type' => $type,
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];
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$preceedingItem = $this->data[$insertStartIndex - 1];
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if ($this->data[$insertStartIndex - 1]['start'] === $start) {
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// The old item starts at the exact same point as the new item.
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--$insertStartIndex;
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}
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// Now we know where to insert the item, we need to know where it
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// starts overlapping with items on the tail end. We need to start
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// looking one item before the insertStartIndex, because it's possible
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// that the new item 'sits inside' the previous old item.
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if ($insertStartIndex > 0) {
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$currentIndex = $insertStartIndex - 1;
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} else {
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$currentIndex = 0;
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}
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while ($end > $this->data[$currentIndex]['end']) {
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++$currentIndex;
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}
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// What we are about to insert into the array
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$newItems = [
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$newItem,
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];
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// This is the amount of items that are completely overwritten by the
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// new item.
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$itemsToDelete = $currentIndex - $insertStartIndex;
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if ($this->data[$currentIndex]['end'] <= $end) {
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++$itemsToDelete;
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}
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// If itemsToDelete was -1, it means that the newly inserted item is
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// actually sitting inside an existing one. This means we need to split
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// the item at the current position in two and insert the new item in
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// between.
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if (-1 === $itemsToDelete) {
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$itemsToDelete = 0;
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if ($newItem['end'] < $preceedingItem['end']) {
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$newItems[] = [
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'start' => $newItem['end'] + 1,
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'end' => $preceedingItem['end'],
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'type' => $preceedingItem['type'],
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];
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}
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}
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array_splice(
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$this->data,
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$insertStartIndex,
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$itemsToDelete,
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$newItems
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);
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$doMerge = false;
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$mergeOffset = $insertStartIndex;
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$mergeItem = $newItem;
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$mergeDelete = 1;
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if (isset($this->data[$insertStartIndex - 1])) {
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// Updating the start time of the previous item.
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$this->data[$insertStartIndex - 1]['end'] = $start;
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// If the previous and the current are of the same type, we can
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// merge them into one item.
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if ($this->data[$insertStartIndex - 1]['type'] === $this->data[$insertStartIndex]['type']) {
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$doMerge = true;
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--$mergeOffset;
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++$mergeDelete;
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$mergeItem['start'] = $this->data[$insertStartIndex - 1]['start'];
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}
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}
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if (isset($this->data[$insertStartIndex + 1])) {
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// Updating the start time of the next item.
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$this->data[$insertStartIndex + 1]['start'] = $end;
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// If the next and the current are of the same type, we can
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// merge them into one item.
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if ($this->data[$insertStartIndex + 1]['type'] === $this->data[$insertStartIndex]['type']) {
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$doMerge = true;
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++$mergeDelete;
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$mergeItem['end'] = $this->data[$insertStartIndex + 1]['end'];
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}
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}
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if ($doMerge) {
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array_splice(
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$this->data,
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$mergeOffset,
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$mergeDelete,
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[$mergeItem]
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);
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}
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}
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public function getData()
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{
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return $this->data;
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}
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}
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