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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  declare(strict_types = 1);
  18  
  19  namespace mod_choice\completion;
  20  
  21  use core_completion\activity_custom_completion;
  22  
  23  /**
  24   * Activity custom completion subclass for the choice activity.
  25   *
  26   * Class for defining mod_choice's custom completion rules and fetching the completion statuses
  27   * of the custom completion rules for a given choice instance and a user.
  28   *
  29   * @package mod_choice
  30   * @copyright 2021 Jun Pataleta <jun@moodle.com>
  31   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  32   */
  33  class custom_completion extends activity_custom_completion {
  34  
  35      /**
  36       * Fetches the completion state for a given completion rule.
  37       *
  38       * @param string $rule The completion rule.
  39       * @return int The completion state.
  40       */
  41      public function get_state(string $rule): int {
  42          global $DB;
  43  
  44          $this->validate_rule($rule);
  45  
  46          // Choice only supports completionsubmit as a custom rule.
  47          $status = $DB->record_exists('choice_answers', ['choiceid' => $this->cm->instance, 'userid' => $this->userid]);
  48          return $status ? COMPLETION_COMPLETE : COMPLETION_INCOMPLETE;
  49      }
  50  
  51      /**
  52       * Fetch the list of custom completion rules that this module defines.
  53       *
  54       * @return array
  55       */
  56      public static function get_defined_custom_rules(): array {
  57          return [
  58              'completionsubmit'
  59          ];
  60      }
  61  
  62      /**
  63       * Returns an associative array of the descriptions of custom completion rules.
  64       *
  65       * @return array
  66       */
  67      public function get_custom_rule_descriptions(): array {
  68          return [
  69              'completionsubmit' => get_string('completiondetail:submit', 'choice')
  70          ];
  71      }
  72  
  73      /**
  74       * Returns an array of all completion rules, in the order they should be displayed to users.
  75       *
  76       * @return array
  77       */
  78      public function get_sort_order(): array {
  79          return [
  80              'completionview',
  81              'completionsubmit',
  82          ];
  83      }
  84  }