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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   * Defines classes used for plugin info.
  19   *
  20   * @package    core
  21   * @copyright  2013 Petr Skoda {@link http://skodak.org}
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  namespace core\plugininfo;
  25  
  26  defined('MOODLE_INTERNAL') || die();
  27  
  28  /**
  29   * Class for admin tool plugins
  30   */
  31  class gradingform extends base {
  32  
  33      public function is_uninstall_allowed() {
  34          return true;
  35      }
  36  
  37      /**
  38       * Pre-uninstall hook.
  39       * This is intended for disabling of plugin, some DB table purging, etc.
  40       */
  41      public function uninstall_cleanup() {
  42          global $DB;
  43  
  44          // Find all definitions and templates.
  45          $definitions = $DB->get_fieldset_select('grading_definitions', 'id', 'method = ?', [$this->name]);
  46          if ($definitions) {
  47              // Delete instances and definitions. Deleting instance will not delete grades because they were
  48              // already pushed to the module and gradebook.
  49              list($sqld, $paramsd) = $DB->get_in_or_equal($definitions);
  50              $DB->delete_records_select('grading_instances', 'definitionid ' . $sqld, $paramsd);
  51              $DB->delete_records_select('grading_definitions', 'id ' . $sqld, $paramsd);
  52          }
  53          // Delete templates for this grading method.
  54          $DB->delete_records_select('grading_areas', 'component = ? AND activemethod = ?', array('core_grading', $this->name));
  55          // Update the remaining grading areas to use simple grading method instead of this grading method.
  56          $DB->execute('UPDATE {grading_areas} SET activemethod = NULL WHERE activemethod = ?', [$this->name]);
  57  
  58          parent::uninstall_cleanup();
  59      }
  60  }