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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  namespace quiz_statistics;
  18  
  19  use core\dml\sql_join;
  20  
  21  /**
  22   * Clear the statistics cache when the quiz structure is modified.
  23   *
  24   * @package   quiz_statistics
  25   * @copyright 2023 onwards Catalyst IT EU {@link https://catalyst-eu.net}
  26   * @author    Mark Johnson <mark.johnson@catalyst-eu.net>
  27   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  28   */
  29  class quiz_structure_modified {
  30      /**
  31       * Clear the statistics cache.
  32       *
  33       * @param int $quizid The quiz to clear the cache for.
  34       * @return void
  35       */
  36      public static function callback(int $quizid): void {
  37          global $DB, $CFG;
  38          require_once($CFG->dirroot . '/mod/quiz/report/statistics/statisticslib.php');
  39          require_once($CFG->dirroot . '/mod/quiz/report/statistics/report.php');
  40          $quiz = $DB->get_record('quiz', ['id' => $quizid]);
  41          if (!$quiz) {
  42              throw new \coding_exception('Could not find quiz with ID ' . $quizid . '.');
  43          }
  44          $qubaids = quiz_statistics_qubaids_condition(
  45              $quiz->id,
  46              new sql_join(),
  47              $quiz->grademethod
  48          );
  49  
  50          $report = new \quiz_statistics_report();
  51          $report->clear_cached_data($qubaids);
  52      }
  53  }