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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   * Contains an observer class containing methods for handling events.
  19   *
  20   * @package    message_email
  21   * @copyright  2019 Mark Nelson <markn@moodle.com>
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace message_email;
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  /**
  30   * Observer class containing methods for handling events.
  31   *
  32   * @package    message_email
  33   * @copyright  2019 Mark Nelson <markn@moodle.com>
  34   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  35   */
  36  class event_observers {
  37  
  38      /**
  39       * Message viewed event handler.
  40       *
  41       * @param \core\event\message_viewed $event The message viewed event.
  42       */
  43      public static function message_viewed(\core\event\message_viewed $event) {
  44          global $DB;
  45  
  46          $userid = $event->userid;
  47          $messageid = $event->other['messageid'];
  48  
  49          $DB->delete_records('message_email_messages', ['useridto' => $userid, 'messageid' => $messageid]);
  50      }
  51  }