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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 the 'qtype_missingtype' question definition class.
  19   *
  20   * @package    qtype
  21   * @subpackage missingtype
  22   * @copyright  2009 The Open University
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  
  30  /**
  31   * This question definition class is used when the actual question type of this
  32   * question cannot be found.
  33   *
  34   * Why does this this class implement question_automatically_gradable? I am not
  35   * sure at the moment. Perhaps it is important for it to work with as many
  36   * behaviours as possible.
  37   *
  38   * @copyright  2009 The Open University
  39   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  40   */
  41  class qtype_missingtype_question extends question_definition
  42          implements question_automatically_gradable {
  43      public function get_expected_data() {
  44          return array();
  45      }
  46  
  47      public function get_correct_response() {
  48          return array();
  49      }
  50  
  51      public function is_complete_response(array $response) {
  52          return false;
  53      }
  54  
  55      public function is_gradable_response(array $response) {
  56          return false;
  57      }
  58  
  59      public function get_validation_error(array $response) {
  60          return '';
  61      }
  62  
  63      public function is_same_response(array $prevresponse, array $newresponse) {
  64          return true;
  65      }
  66  
  67      public function get_right_answer_summary() {
  68          return '';
  69      }
  70  
  71      public function summarise_response(array $response) {
  72          return null;
  73      }
  74  
  75      public function classify_response(array $response) {
  76          return array();
  77      }
  78  
  79      public function start_attempt(question_attempt_step $step, $variant) {
  80          throw new coding_exception('This question is of a type that is not installed ' .
  81                  'on your system. No processing is possible.');
  82      }
  83  
  84      public function grade_response(array $response) {
  85          throw new coding_exception('This question is of a type that is not installed ' .
  86                  'on your system. No processing is possible.');
  87      }
  88  
  89      public function get_hint($hintnumber, question_attempt $qa) {
  90          return null;
  91      }
  92  }