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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   * Privacy Subsystem implementation for core_cache.
  19   *
  20   * @package    core_cache
  21   * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace core_cache\privacy;
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  use \core_privacy\local\metadata\collection;
  30  
  31  /**
  32   * Privacy Subsystem implementation for core_cache.
  33   *
  34   * @copyright  2018 Andrew Nicols <andrew@nicols.co.uk>
  35   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  36   */
  37  class provider implements
  38          // Caches store data.
  39          \core_privacy\local\metadata\provider,
  40  
  41          // The cache subsystem stores data on behalf of other components.
  42          \core_privacy\local\request\subsystem\plugin_provider,
  43          \core_privacy\local\request\shared_userlist_provider
  44      {
  45  
  46      /**
  47       * Returns meta data about this system.
  48       *
  49       * Note, although this plugin does store user data, it is not able to
  50       * identify it, and that user data is typically very short lived.
  51       *
  52       * Therefore it is not realistically possible to export any of this
  53       * data as it is only identifiable by the plugin storing it, and that
  54       * plugin should already be exporting the data as part of it's own
  55       * implementation.
  56       *
  57       * @param   collection     $collection The initialised collection to add items to.
  58       * @return  collection     A listing of user data stored through this system.
  59       */
  60      public static function get_metadata(collection $collection) : collection {
  61          // Data is stored in cache stores.
  62          $collection->add_plugintype_link('cachestore', [], 'privacy:metadata:cachestore');
  63  
  64          // Cache locks do not store any personal user data.
  65  
  66          return $collection;
  67      }
  68  }