[Summary view]

   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  namespace repository_filesystem\task;
  18  defined('MOODLE_INTERNAL') || die();
  19  
  20  /**
  21   * A schedule task for file system repository cron.
  22   *
  23   * @package   repository_filesystem
  24   * @copyright 2019 Simey Lameze <simey@moodle.com>
  25   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  26   */
  27  class cron_task extends \core\task\scheduled_task {
  28      /**
  29       * Get a descriptive name for this task (shown to admins).
  30       *
  31       * @return string
  32       */
  33      public function get_name() {
  34          return get_string('crontask', 'repository_filesystem');
  35      }
  36  
  37      /**
  38       * Run file system repository cron.
  39       */
  40      public function execute() {
  41          global $CFG;
  42          require_once($CFG->dirroot . '/repository/lib.php');
  43  
  44          $fs = get_file_storage();
  45          // Find all generated thumbnails and group them in array by itemid (itemid == repository instance id).
  46          $allfiles = array_merge(
  47              $fs->get_area_files(SYSCONTEXTID, 'repository_filesystem', 'thumb'),
  48              $fs->get_area_files(SYSCONTEXTID, 'repository_filesystem', 'icon')
  49          );
  50          $filesbyitem = array();
  51          foreach ($allfiles as $file) {
  52              if (!isset($filesbyitem[$file->get_itemid()])) {
  53                  $filesbyitem[$file->get_itemid()] = array();
  54              }
  55              $filesbyitem[$file->get_itemid()][] = $file;
  56          }
  57          // Find all instances of repository_filesystem.
  58          $instances = \repository::get_instances(array('type' => 'filesystem'));
  59          // Loop through all itemids of generated thumbnails.
  60          foreach ($filesbyitem as $itemid => $files) {
  61              if (!isset($instances[$itemid]) || !($instances[$itemid] instanceof repository_filesystem)) {
  62                  // Instance was deleted.
  63                  $fs->delete_area_files(SYSCONTEXTID, 'repository_filesystem', 'thumb', $itemid);
  64                  $fs->delete_area_files(SYSCONTEXTID, 'repository_filesystem', 'icon', $itemid);
  65                  mtrace(" instance $itemid does not exist: deleted all thumbnails");
  66              } else {
  67                  // Instance has some generated thumbnails, check that they are not outdated.
  68                  $instances[$itemid]->remove_obsolete_thumbnails($files);
  69              }
  70          }
  71      }
  72  }