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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   * A scheduled task.
  19   *
  20   * @package    core
  21   * @copyright  2013 onwards Martin Dougiamas  http://dougiamas.com
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  namespace core\task;
  25  
  26  /**
  27   * Simple task to run the blog cron.
  28   */
  29  class blog_cron_task extends scheduled_task {
  30  
  31      /**
  32       * Get a descriptive name for this task (shown to admins).
  33       *
  34       * @return string
  35       */
  36      public function get_name() {
  37          return get_string('taskblogcron', 'admin');
  38      }
  39  
  40      /**
  41       * Do the job.
  42       * Throw exceptions on errors (the job will be retried).
  43       */
  44      public function execute() {
  45          global $CFG, $DB;
  46  
  47          $timenow = time();
  48          // Run external blog cron if needed.
  49          if (!empty($CFG->enableblogs) && $CFG->useexternalblogs) {
  50              require_once($CFG->dirroot . '/blog/lib.php');
  51              $sql = "timefetched < ? OR timefetched = 0";
  52              $externalblogs = $DB->get_records_select('blog_external', $sql, array($timenow - $CFG->externalblogcrontime));
  53  
  54              foreach ($externalblogs as $eb) {
  55                  blog_sync_external_entries($eb);
  56              }
  57          }
  58          // Run blog associations cleanup.
  59          if (!empty($CFG->enableblogs) && $CFG->useblogassociations) {
  60              require_once($CFG->dirroot . '/blog/lib.php');
  61              // Delete entries whose contextids no longer exists.
  62              $DB->delete_records_select('blog_association', 'contextid NOT IN (SELECT id FROM {context})');
  63          }
  64  
  65      }
  66  
  67  }