<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2020 Teclib' and contributors.
 *
 * http://glpi-project.org
 *
 * based on GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2003-2014 by the INDEPNET Development Team.
 *
 * ---------------------------------------------------------------------
 *
 * LICENSE
 *
 * This file is part of GLPI.
 *
 * GLPI is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GLPI is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GLPI. If not, see <http://www.gnu.org/licenses/>.
 * ---------------------------------------------------------------------
 */

if (!defined('GLPI_ROOT')) {
   die("Sorry. You can't access this file directly");
}
// $feed = new SimplePie();
// $feed->set_cache_location('../files/_rss');
// $feed->set_cache_duration(3600);
// $feed->set_feed_url('http://linuxfr.org/news.atom');
// $feed->force_feed(true);
// // Initialize the whole SimplePie object.  Read the feed, process it, parse it, cache it, and
// // all that other good stuff.  The feed's information will not be available to SimplePie before
// // this is called.
// $success = $feed->init();
//
// // We'll make sure that the right content type and character encoding gets set automatically.
// // This function will grab the proper character encoding, as well as set the content type to text/html.
// $feed->handle_content_type();
// if ($feed->error())
// {
//    echo "ERROR";
// } else {
//    echo $feed->get_title();
//    echo $feed->get_link();
// }

/**
 * RSSFeed Class
 *
 * @since 0.84
**/
class RSSFeed extends CommonDBVisible implements ExtraVisibilityCriteria {

   // From CommonDBTM
   public $dohistory                   = true;

   // For visibility checks
   protected $users     = [];
   protected $groups    = [];
   protected $profiles  = [];
   protected $entities  = [];

   static $rightname    = 'rssfeed_public';


   static function getTypeName($nb = 0) {

      if (Session::haveRight('rssfeed_public', READ)) {
         return _n('RSS feed', 'RSS feed', $nb);
      }
      return _n('Personal RSS feed', 'Personal RSS feed', $nb);
   }


   static function canCreate() {

      return (Session::haveRight(self::$rightname, CREATE)
              || Session::getCurrentInterface() != 'helpdesk');
   }


   static function canView() {

      return (Session::haveRight('rssfeed_public', READ)
              || Session::getCurrentInterface() != 'helpdesk');
   }


   function canViewItem() {

      // Is my rssfeed or is in visibility
      return (($this->fields['users_id'] == Session::getLoginUserID())
              || (Session::haveRight('rssfeed_public', READ)
                  && $this->haveVisibilityAccess()));
   }


   function canCreateItem() {
      // Is my rssfeed
      return ($this->fields['users_id'] == Session::getLoginUserID());
   }


   function canUpdateItem() {

      return (($this->fields['users_id'] == Session::getLoginUserID())
              || (Session::haveRight('rssfeed_public', UPDATE)
                  && $this->haveVisibilityAccess()));
   }


   /**
    * @since 0.85
    * for personal rss feed
   **/
   static function canUpdate() {
      return (Session::getCurrentInterface() != 'helpdesk');
   }


   /**
    * @since 0.85
    * for personal rss feed
   **/
   static function canPurge() {
      return (Session::getCurrentInterface() != 'helpdesk');
   }


   /**
    * @since 0.85
    *
    * @see CommonDBTM::canPurgeItem()
   **/
   function canPurgeItem() {

      return (($this->fields['users_id'] == Session::getLoginUserID())
              || (Session::haveRight(self::$rightname, PURGE)
                  && $this->haveVisibilityAccess()));
   }


   function post_getFromDB() {

      // Users
      $this->users    = RSSFeed_User::getUsers($this->fields['id']);

      // Entities
      $this->entities = Entity_RSSFeed::getEntities($this->fields['id']);

      // Group / entities
      $this->groups   = Group_RSSFeed::getGroups($this->fields['id']);

      // Profile / entities
      $this->profiles = Profile_RSSFeed::getProfiles($this->fields['id']);
   }


   /**
    * @see CommonDBTM::cleanDBonPurge()
   **/
   function cleanDBonPurge() {

      $this->deleteChildrenAndRelationsFromDb(
         [
            Entity_RSSFeed::class,
            Group_RSSFeed::class,
            Profile_RSSFeed::class,
            RSSFeed_User::class,
         ]
      );
   }

   public function haveVisibilityAccess() {
      if (!self::canView()) {
         return false;
      }

      return parent::haveVisibilityAccess();
   }

   /**
    * Return visibility joins to add to SQL
    *
    * @param $forceall force all joins (false by default)
    *
    * @return string joins to add
   **/
   static function addVisibilityJoins($forceall = false) {
      //not deprecated because used in Search
      global $DB;

      //get and clean criteria
      $criteria = self::getVisibilityCriteria();
      unset($criteria['WHERE']);
      $criteria['FROM'] = self::getTable();

      $it = new \DBmysqlIterator(null);
      $it->buildQuery($criteria);
      $sql = $it->getSql();
      $sql = str_replace(
         'SELECT * FROM '.$DB->quoteName(self::getTable()).' ',
         '',
         $sql
      );
      return $sql;
   }


   /**
    * Return visibility SQL restriction to add
    *
    * @return string restrict to add
   **/
   static function addVisibilityRestrict() {
      //not deprecated because used in Search

      //get and clean criteria
      $criteria = self::getVisibilityCriteria();
      unset($criteria['LEFT JOIN']);
      $criteria['FROM'] = self::getTable();

      $it = new \DBmysqlIterator(null);
      $it->buildQuery($criteria);
      $sql = $it->getSql();
      $sql = preg_replace('/.*WHERE /', '', $sql);

      return $sql;
   }

   /**
    * Return visibility joins to add to DBIterator parameters
    *
    * @since 9.4
    *
    * @param boolean $forceall force all joins (false by default)
    *
    * @return array
    */
   static public function getVisibilityCriteria(bool $forceall = false): array {
      $where = [self::getTable() . '.users_id' => Session::getLoginUserID()];
      $join = [];

      if (!self::canView()) {
         return [
            'LEFT JOIN' => $join,
            'WHERE'     => $where
         ];
      }

      //JOINs
      // Users
      $join['glpi_rssfeeds_users'] = [
         'ON' => [
            'glpi_rssfeeds_users'   => 'rssfeeds_id',
            'glpi_rssfeeds'         => 'id'
         ]
      ];

      $where = [
         'OR' => [
            self::getTable() . '.users_id'   => Session::getLoginUserID(),
            'glpi_rssfeeds_users.users_id'   => Session::getLoginUserID()
         ]
      ];
      $orwhere = [];

      // Groups
      if ($forceall
          || (isset($_SESSION["glpigroups"]) && count($_SESSION["glpigroups"]))) {
         $join['glpi_groups_rssfeeds'] = [
            'ON' => [
               'glpi_groups_rssfeeds'  => 'rssfeeds_id',
               'glpi_rssfeeds'         => 'id'
            ]
         ];
      }

      if (isset($_SESSION["glpigroups"]) && count($_SESSION["glpigroups"])) {
         $restrict = getEntitiesRestrictCriteria('glpi_groups_rssfeeds', '', '', true);
         $orwhere[] = [
            'glpi_groups_rssfeeds.groups_id' => count($_SESSION["glpigroups"])
                                                      ? $_SESSION["glpigroups"]
                                                      : [-1],
            'OR' => [
               'glpi_groups_rssfeeds.entities_id' => ['<', '0'],
            ] + $restrict
         ];
      }

      // Profiles
      if ($forceall
          || (isset($_SESSION["glpiactiveprofile"])
              && isset($_SESSION["glpiactiveprofile"]['id']))) {
         $join['glpi_profiles_rssfeeds'] = [
            'ON' => [
               'glpi_profiles_rssfeeds'   => 'rssfeeds_id',
               'glpi_rssfeeds'            => 'id'
            ]
         ];
      }

      if (isset($_SESSION["glpiactiveprofile"]) && isset($_SESSION["glpiactiveprofile"]['id'])) {
         $restrict = getEntitiesRestrictCriteria('glpi_entities_rssfeeds', '', '', true);
         if (!count($restrict)) {
            $restrict = [true];
         }
         $ors = [
            'glpi_profiles_rssfeeds.entities_id' => ['<', '0'],
            $restrict
         ];

         $orwhere[] = [
            'glpi_profiles_rssfeeds.profiles_id' => $_SESSION["glpiactiveprofile"]['id'],
            'OR' => $ors
         ];
      }

      // Entities
      if ($forceall
          || (isset($_SESSION["glpiactiveentities"]) && count($_SESSION["glpiactiveentities"]))) {
         $join['glpi_entities_rssfeeds'] = [
            'ON' => [
               'glpi_entities_rssfeeds'   => 'rssfeeds_id',
               'glpi_rssfeeds'            => 'id'
            ]
         ];
      }

      if (isset($_SESSION["glpiactiveentities"]) && count($_SESSION["glpiactiveentities"])) {
         // Force complete SQL not summary when access to all entities
         $restrict = getEntitiesRestrictCriteria('glpi_entities_rssfeeds', '', '', true, true);
         if (count($restrict)) {
            $orwhere[] = $restrict;
         }
      }

      $where['OR'] = array_merge($where['OR'], $orwhere);
      $criteria = ['LEFT JOIN' => $join];
      if (count($where)) {
         $criteria['WHERE'] = $where;
      }

      return $criteria;
   }

   /**
    * @param $field
    * @param $values
    * @param $options   array
   **/
   static function getSpecificValueToDisplay($field, $values, array $options = []) {

      if (!is_array($values)) {
         $values = [$field => $values];
      }
      switch ($field) {
         case 'refresh_rate':
            return Html::timestampToString($values[$field], false);
      }
      return parent::getSpecificValueToDisplay($field, $values, $options);
   }


   /**
    * @param $field
    * @param $name               (default '')
    * @param $values             (default '')
    * @param $options      array
    **/
   static function getSpecificValueToSelect($field, $name = '', $values = '', array $options = []) {

      if (!is_array($values)) {
         $values = [$field => $values];
      }
      $options['display'] = false;

      switch ($field) {
         case 'refresh_rate' :
            return Planning::dropdownState($name, $values[$field], false);
      }
      return parent::getSpecificValueToSelect($field, $name, $values, $options);
   }


   function rawSearchOptions() {
      $tab = [];

      $tab[] = [
         'id'                 => 'common',
         'name'               => __('Characteristics')
      ];

      $tab[] = [
         'id'                 => '1',
         'table'              => $this->getTable(),
         'field'              => 'name',
         'name'               => __('Name'),
         'datatype'           => 'itemlink',
         'massiveaction'      => false,
         'forcegroupby'       => true,
         'autocomplete'       => true,
      ];

      $tab[] = [
         'id'                 => '2',
         'table'              => 'glpi_users',
         'field'              => 'name',
         'name'               => __('Creator'),
         'datatype'           => 'dropdown',
         'massiveaction'      => false,
         'right'              => 'all'
      ];

      $tab[] = [
         'id'                 => '3',
         'table'              => $this->getTable(),
         'field'              => 'url',
         'name'               => __('URL'),
         'datatype'           => 'string',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '4',
         'table'              => $this->getTable(),
         'field'              => 'is_active',
         'name'               => __('Active'),
         'datatype'           => 'bool',
         'massiveaction'      => true
      ];

      $tab[] = [
         'id'                 => '6',
         'table'              => $this->getTable(),
         'field'              => 'have_error',
         'name'               => __('Error'),
         'datatype'           => 'bool',
         'massiveaction'      => true
      ];

      $tab[] = [
         'id'                 => '7',
         'table'              => $this->getTable(),
         'field'              => 'max_items',
         'name'               => __('Number of items displayed'),
         'datatype'           => 'number',
         'min'                => 5,
         'max'                => 100,
         'step'               => 5,
         'toadd'              => [1],
         'massiveaction'      => true
      ];

      $tab[] = [
         'id'                 => '16',
         'table'              => $this->getTable(),
         'field'              => 'comment',
         'name'               => __('Comments'),
         'datatype'           => 'text'
      ];

      $tab[] = [
         'id'                 => '5',
         'table'              => $this->getTable(),
         'field'              => 'refresh_rate',
         'name'               => __('Refresh rate'),
         'datatype'           => 'timestamp',
         'min'                => HOUR_TIMESTAMP,
         'max'                => DAY_TIMESTAMP,
         'step'               => HOUR_TIMESTAMP,
         'toadd'              => [
            5 * MINUTE_TIMESTAMP,
            15 * MINUTE_TIMESTAMP,
            30 * MINUTE_TIMESTAMP,
            45 * MINUTE_TIMESTAMP
         ],
         'display_emptychoice' => false,
         'massiveaction'      => true,
         'searchtype'         => 'equals'
      ];

      $tab[] = [
         'id'                 => '19',
         'table'              => $this->getTable(),
         'field'              => 'date_mod',
         'name'               => __('Last update'),
         'datatype'           => 'datetime',
         'massiveaction'      => false
      ];

      $tab[] = [
         'id'                 => '121',
         'table'              => $this->getTable(),
         'field'              => 'date_creation',
         'name'               => __('Creation date'),
         'datatype'           => 'datetime',
         'massiveaction'      => false
      ];

      // add objectlock search options
      $tab = array_merge($tab, ObjectLock::rawSearchOptionsToAdd(get_class($this)));

      return $tab;
   }


   /**
    * @see CommonGLPI::getTabNameForItem()
   **/
   function getTabNameForItem(CommonGLPI $item, $withtemplate = 0) {

      if (self::canView()) {
         $nb = 0;
         switch ($item->getType()) {
            case 'RSSFeed' :
               $showtab = [1 => __('Content')];
               if (Session::haveRight('rssfeed_public', UPDATE)) {
                  if ($_SESSION['glpishow_count_on_tabs']) {
                     $nb = $item->countVisibilities();
                  }
                  $showtab[2] = self::createTabEntry(_n('Target', 'Targets',
                                                        Session::getPluralNumber()), $nb);
               }
               return $showtab;
         }
      }
      return '';
   }


   /**
    * @see CommonGLPI::defineTabs()
   **/
   function defineTabs($options = []) {

      $ong = [];
      $this->addDefaultFormTab($ong);
      $this->addStandardTab(__CLASS__, $ong, $options);
      $this->addStandardTab('Log', $ong, $options);

      return $ong;
   }


   /**
    * @param $item         CommonGLPI object
    * @param $tabnum       (default 1)
    * @param $withtemplate (default 0)
   **/
   static function displayTabContentForItem(CommonGLPI $item, $tabnum = 1, $withtemplate = 0) {

      switch ($item->getType()) {
         case 'RSSFeed' :
            switch ($tabnum) {
               case 1 :
                  $item->showFeedContent();
                  return true;

               case 2 :
                  $item->showVisibility();
                  return true;
            }
      }
      return false;
   }


   /**
    * @see CommonDBTM::prepareInputForAdd()
   **/
   function prepareInputForAdd($input) {

      if ($feed = self::getRSSFeed($input['url'])) {
         $input['have_error'] = 0;
         $input['name']       = addslashes($feed->get_title());
         if (empty($input['comment'])) {
            $input['comment'] = addslashes($feed->get_description());
         }
      } else {
         $input['have_error'] = 1;
         $input['name']       = '';
      }
      $input["name"] = trim($input["name"]);

      if (empty($input["name"])) {
         $input["name"] = __('Without title');
      }
      return $input;
   }


   /**
    * @see CommonDBTM::prepareInputForAdd()
   **/
   function prepareInputForUpdate($input) {

      if (empty($input['name'])
          && isset($input['url'])
          && ($feed = self::getRSSFeed($input['url']))) {
         $input['name'] = addslashes($feed->get_title());
         if (empty($input['comment'])) {
            $input['comment'] = addslashes($feed->get_description());
         }
      }
      return $input;
   }


   function pre_updateInDB() {

      // Set new user if initial user have been deleted
      if (($this->fields['users_id'] == 0)
          && ($uid = Session::getLoginUserID())) {
         $this->fields['users_id'] = $uid;
         $this->updates[]          = "users_id";
      }
   }


   function post_getEmpty() {

      $this->fields["name"]         = __('New note');
      $this->fields["users_id"]     = Session::getLoginUserID();
      $this->fields["refresh_rate"] = DAY_TIMESTAMP;
      $this->fields["max_items"]    = 20;
   }


   /**
    * Print the rssfeed form
    *
    * @param $ID        integer  Id of the item to print
    * @param $options   array    of possible options:
    *     - target filename : where to go when done.
    **/
   function showForm($ID, $options = []) {
      // Test _rss cache directory. I permission trouble : unable to edit
      if (Toolbox::testWriteAccessToDirectory(GLPI_RSS_DIR) > 0) {
         echo "<div class='center'>";
         printf(__('Check permissions to the directory: %s'), GLPI_RSS_DIR);
         echo "<p class='red b'>".__('Error')."</p>";
         echo "</div>";
         return false;
      }

      $this->initForm($ID, $options);

      $this->showFormHeader($options);

      $rowspan = 4;

      if (!$this->isNewID($ID)) {
         // Force getting feed :
         $feed = self::getRSSFeed($this->fields['url'], $this->fields['refresh_rate']);
         if (!$feed || $feed->error()) {
            $this->setError(true);
         } else {
            $this->setError(false);
         }
         echo "<tr class='tab_bg_2'>";
         echo "<td>".__('Name')."</td>";
         echo "<td>";
         Html::autocompletionTextField($this, "name",
                                       ['entity' => -1,
                                             'user'   => $this->fields["users_id"]]);
         echo "</td><td colspan ='2'>&nbsp;</td></tr>\n";
      }

      echo "<tr class='tab_bg_1'><td>" . __('URL') . "</td>";
      echo "<td colspan='3'>";
      echo "<input type='text' name='url' size='100' value='".$this->fields["url"]."'>";
      echo "</td></tr>";

      echo "<tr class='tab_bg_2'>";
      echo "<td>".__('By')."</td>";
      echo "<td>";
      echo getUserName($this->fields["users_id"]);
      echo "<input type='hidden' name='users_id' value='".$this->fields['users_id']."'>\n";
      echo "</td>";
      echo "<td rowspan='$rowspan'>".__('Comments')."</td>";
      echo "<td rowspan='$rowspan' class='middle'>";
      echo "<textarea cols='45' rows='".($rowspan+3)."' name='comment' >".$this->fields["comment"].
           "</textarea>";
      echo "</td></tr>\n";

      echo "<tr class='tab_bg_2'>";
      echo "<td>".__('Active')."</td>";
      echo "<td>";
      Dropdown::showYesNo('is_active', $this->fields['is_active']);
      echo "</td></tr>\n";

      echo "<tr class='tab_bg_2'>";
      echo "<td>".__('Refresh rate')."</td>";
      echo "<td>";
      Dropdown::showTimeStamp("refresh_rate",
                              ['value'                => $this->fields["refresh_rate"],
                                    'min'                  => HOUR_TIMESTAMP,
                                    'max'                  => DAY_TIMESTAMP,
                                    'step'                 => HOUR_TIMESTAMP,
                                    'display_emptychoice'  => false,
                                    'toadd'                => [5*MINUTE_TIMESTAMP,
                                                                    15*MINUTE_TIMESTAMP,
                                                                    30*MINUTE_TIMESTAMP,
                                                                    45*MINUTE_TIMESTAMP]]);
      echo "</td></tr>\n";

      echo "<tr class='tab_bg_2'>";
      echo "<td>".__('Number of items displayed')."</td>";
      echo "<td>";
      Dropdown::showNumber("max_items", ['value'                => $this->fields["max_items"],
                                              'min'                  => 5,
                                              'max'                  => 100,
                                              'step'                 => 5,
                                              'toadd'                => [1],
                                              'display_emptychoice'  => false]);
      echo "</td></tr>\n";

      echo "<tr class='tab_bg_2'>";
      echo "<td>".__('Error retrieving RSS feed')."</td>";
      echo "<td>";
      echo Dropdown::getYesNo($this->fields['have_error']);
      echo "</td>";
      if ($this->fields['have_error']) {
         echo "<td>".__('RSS feeds found');
         echo "</td><td>";
         $this->showDiscoveredFeeds();
         echo "</td>\n";
      } else {
         echo "<td colspan='2'>&nbsp;</td>";
      }
      echo "</tr>";

      $this->showFormButtons($options);

      return true;
   }


   /**
    * Set error field
    *
    * @param $error   (false by default
    **/
   function setError($error = false) {

      if (!isset($this->fields['id']) && !isset($this->fields['have_error'])) {
         return;
      }

      // Set error if not set
      if ($error && !$this->fields['have_error']) {
         $this->update(['id'         => $this->fields['id'],
                             'have_error' => 1]);
      }
      // Unset error if set
      if (!$error && $this->fields['have_error']) {
         $this->update(['id'         => $this->fields['id'],
                             'have_error' => 0]);
      }
   }


   /**
    * Show the feed content
    **/
   function showFeedContent() {

      if (!$this->canViewItem()) {
         return false;
      }
      $feed = self::getRSSFeed($this->fields['url'], $this->fields['refresh_rate']);
      echo "<div class='firstbloc'>";
      if (!$feed || $feed->error()) {
         echo __('Error retrieving RSS feed');
         $this->setError(true);
      } else {
         $this->setError(false);
         echo "<table class='tab_cadre_fixehov'>";
         echo "<tr><th colspan='3'>".$feed->get_title()."</th>";
         foreach ($feed->get_items(0, $this->fields['max_items']) as $item) {
            $link = $item->get_permalink();
            echo "<tr class='tab_bg_1'><td>";
            echo Html::convDateTime($item->get_date('Y-m-d H:i:s'));
            echo "</td><td>";
            if (!is_null($link)) {
               echo "<a target='_blank' href='$link'>".$item->get_title().'</a>';
            } else {
               $item->get_title();
            }
            echo "</td><td>";
            $rand = mt_rand();
            echo "<span id='rssitem$rand' class='pointer'>";
            echo Html::resume_text(Html::clean(Toolbox::unclean_cross_side_scripting_deep($item->get_content())),
                                   1000);
            echo "</span>";
            Html::showToolTip(Toolbox::unclean_html_cross_side_scripting_deep($item->get_content()),
                               ['applyto' => "rssitem$rand",
                                     'display' => true]);
            echo "</td></tr>";
         }
         echo "</table>";

      }
      echo "</div>";
   }


   /**
    * Show discovered feeds
    *
    * @return nothin
    **/
   function showDiscoveredFeeds() {

      $feed = new SimplePie();
      $feed->set_cache_location(GLPI_RSS_DIR);
      $feed->enable_cache(false);
      $feed->set_feed_url($this->fields['url']);
      $feed->init();
      $feed->handle_content_type();

      if ($feed->error()) {
         return false;
      }

      foreach ($feed->get_all_discovered_feeds() as $f) {
         $newurl  = $f->url;
         $newfeed = self::getRSSFeed($newurl);
         if ($newfeed && !$newfeed->error()) {
            $link = $newfeed->get_permalink();
            if (!empty($link)) {
               echo "<a href='$newurl'>".$newfeed->get_title()."</a>&nbsp;";
               Html::showSimpleForm($this->getFormURL(), 'update', _x('button', 'Use'),
                                    ['id'  => $this->getID(),
                                          'url' => $newurl]);
               echo "<br>";
            }
         }
      }

   }


   /**
    * Get a specific RSS feed
    *
    * @param $url             string/array   URL of the feed or array of URL
    * @param $cache_duration  timestamp      cache duration (default DAY_TIMESTAMP)
    *
    * @return feed object
   **/
   static function getRSSFeed($url, $cache_duration = DAY_TIMESTAMP) {
      global $CFG_GLPI;

      $feed = new SimplePie();
      $feed->set_cache_location(GLPI_RSS_DIR);
      $feed->set_cache_duration($cache_duration);

      // proxy support
      if (!empty($CFG_GLPI["proxy_name"])) {
         $prx_opt = [];
         $prx_opt[CURLOPT_PROXY]     = $CFG_GLPI["proxy_name"];
         $prx_opt[CURLOPT_PROXYPORT] = $CFG_GLPI["proxy_port"];
         if (!empty($CFG_GLPI["proxy_user"])) {
            $prx_opt[CURLOPT_HTTPAUTH]     = CURLAUTH_ANYSAFE;
            $prx_opt[CURLOPT_PROXYUSERPWD] = $CFG_GLPI["proxy_user"].":".
                                             Toolbox::sodiumDecrypt($CFG_GLPI["proxy_passwd"]);
         }
         $feed->set_curl_options($prx_opt);
      }

      $feed->enable_cache(true);
      $feed->set_feed_url($url);
      $feed->force_feed(true);
      // Initialize the whole SimplePie object.  Read the feed, process it, parse it, cache it, and
      // all that other good stuff.  The feed's information will not be available to SimplePie before
      // this is called.
      $feed->init();

      // We'll make sure that the right content type and character encoding gets set automatically.
      // This function will grab the proper character encoding, as well as set the content type to text/html.
      $feed->handle_content_type();
      if ($feed->error()) {
         return false;
      }
      return $feed;
   }


   /**
    * Show list for central view
    *
    * @param $personal boolean   display rssfeeds created by me ? (true by default)
    *
    * @return void
    **/
   static function showListForCentral($personal = true) {
      global $DB, $CFG_GLPI;

      $users_id             = Session::getLoginUserID();

      $table = self::getTable();
      $criteria = [
         'SELECT'   => "$table.*",
         'DISTINCT' => true,
         'FROM'     => $table,
         'ORDER'    => "$table.name"
      ];

      if ($personal) {

         /// Personal notes only for central view
         if (Session::getCurrentInterface() == 'helpdesk') {
            return false;
         }

         $criteria['WHERE']["$table.users_id"] = $users_id;
         $criteria['WHERE']["$table.is_active"] = 1;

         $titre = "<a href='".$CFG_GLPI["root_doc"]."/front/rssfeed.php'>".
                    _n('Personal RSS feed', 'Personal RSS feeds', Session::getPluralNumber())."</a>";

      } else {
         // Show public rssfeeds / not mines : need to have access to public rssfeeds
         if (!self::canView()) {
            return false;
         }

         $criteria = $criteria + self::getVisibilityCriteria();

         // Only personal on central so do not keep it
         if (Session::getCurrentInterface() == 'central') {
            $criteria['WHERE']["$table.users_id"] = ['<>', $users_id];
         }

         if (Session::getCurrentInterface() == 'central') {
            $titre = "<a href=\"".$CFG_GLPI["root_doc"]."/front/rssfeed.php\">".
                       _n('Public RSS feed', 'Public RSS feeds', Session::getPluralNumber())."</a>";
         } else {
            $titre = _n('Public RSS feed', 'Public RSS feeds', Session::getPluralNumber());
         }
      }

      $iterator = $DB->request($criteria);
      $nb = count($iterator);
      $items   = [];
      $rssfeed = new self();
      while ($data = $iterator->next()) {
         if ($rssfeed->getFromDB($data['id'])) {
            // Force fetching feeds
            if ($feed = self::getRSSFeed($data['url'], $data['refresh_rate'])) {
               // Store feeds in array of feeds
               $items = array_merge($items, $feed->get_items(0, $data['max_items']));
               $rssfeed->setError(false);
            } else {
               $rssfeed->setError(true);
            }
         }
      }

      echo "<br><table class='tab_cadrehov'>";
      echo "<tr class='noHover'><th colspan='2'><div class='relative'><span>$titre</span>";

      if (($personal && self::canCreate())
            || (!$personal && Session::haveRight('rssfeed_public', CREATE))) {
         echo "<span class='floatright'>";
         echo "<a href='".RSSFeed::getFormURL()."'>";
         echo "<img src='".$CFG_GLPI["root_doc"]."/pics/plus.png' alt='".__s('Add')."' title=\"".
                __s('Add')."\"></a></span>";
      }

      echo "</div></th></tr>\n";

      if ($nb) {
         usort($items, ['SimplePie', 'sort_items']);
         foreach ($items as $item) {
            echo "<tr class='tab_bg_1'><td>";
            echo Html::convDateTime($item->get_date('Y-m-d H:i:s'));
            echo "</td><td>";
            $link = $item->feed->get_permalink();
            if (empty($link)) {
               echo $item->feed->get_title();
            } else {
               echo "<a target='_blank' href='$link'>".$item->feed->get_title().'</a>';
            }
            $link = $item->get_permalink();
            // echo "<br>";
            // echo $item->get_title();
            // echo "</td><td>";

            $rand = mt_rand();
            echo "<div id='rssitem$rand' class='pointer rss'>";
            if (!is_null($link)) {
               echo "<a target='_blank' href='$link'>";
            }
            echo $item->get_title();
            // echo Html::resume_text(Html::clean(Toolbox::unclean_cross_side_scripting_deep($item->get_content())), 300);
            if (!is_null($link)) {
               echo "</a>";
            }
            echo "</div>";
            Html::showToolTip(Toolbox::unclean_html_cross_side_scripting_deep($item->get_content()),
                                                                        ['applyto' => "rssitem$rand",
                                                                              'display' => true]);
            echo "</td></tr>";
         }
      }
      echo "</table>\n";

   }

   /**
    * @since 0.85
    *
    * @see commonDBTM::getRights()
   **/
   function getRights($interface = 'central') {

      if ($interface == 'helpdesk') {
         $values = [READ => __('Read')];
      } else {
         $values = parent::getRights();
      }
      return $values;
   }


   static function getIcon() {
      return "fas fa-rss";
   }
}