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   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  /**
  18   * Group observers.
  19   *
  20   * @package    mod_assign
  21   * @copyright  2016 Ilya Tregubov
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace mod_assign;
  26  defined('MOODLE_INTERNAL') || die();
  27  
  28  require_once($CFG->dirroot . '/mod/assign/locallib.php');
  29  
  30  /**
  31   * Group observers class.
  32   *
  33   * @package    mod_assign
  34   * @copyright  2016 Ilya Tregubov
  35   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  36   */
  37  class group_observers {
  38  
  39      /**
  40       * Flag whether a course reset is in progress or not.
  41       *
  42       * @var int The course ID.
  43       */
  44      protected static $resetinprogress = false;
  45  
  46      /**
  47       * A course reset has started.
  48       *
  49       * @param \core\event\base $event The event.
  50       * @return void
  51       */
  52      public static function course_reset_started($event) {
  53          self::$resetinprogress = $event->courseid;
  54      }
  55  
  56      /**
  57       * A course reset has ended.
  58       *
  59       * @param \core\event\base $event The event.
  60       * @return void
  61       */
  62      public static function course_reset_ended($event) {
  63          if (!empty(self::$resetinprogress)) {
  64              if (!empty($event->other['reset_options']['reset_groups_remove'])) {
  65                  assign_process_group_deleted_in_course($event->courseid);
  66              }
  67          }
  68  
  69          self::$resetinprogress = null;
  70      }
  71  
  72      /**
  73       * A group was deleted.
  74       *
  75       * @param \core\event\base $event The event.
  76       * @return void
  77       */
  78      public static function group_deleted($event) {
  79          if (!empty(self::$resetinprogress)) {
  80              // We will take care of that once the course reset ends.
  81              return;
  82          }
  83          assign_process_group_deleted_in_course($event->courseid, $event->objectid);
  84      }
  85  }