[Summary view]

Differences Between: [Versions 310 and 403] [Versions 311 and 403] [Versions 39 and 403] [Versions 400 and 403] [Versions 401 and 403]

   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   * Rest endpoint for ajax editing of quiz structure.
  19   *
  20   * @package   mod_quiz
  21   * @copyright 1999 Martin Dougiamas  http://dougiamas.com
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  use mod_quiz\quiz_settings;
  26  
  27  if (!defined('AJAX_SCRIPT')) {
  28      define('AJAX_SCRIPT', true);
  29  }
  30  
  31  require_once(__DIR__ . '/../../config.php');
  32  require_once($CFG->dirroot . '/mod/quiz/locallib.php');
  33  
  34  // Initialise ALL the incoming parameters here, up front.
  35  $quizid     = required_param('quizid', PARAM_INT);
  36  $class      = required_param('class', PARAM_ALPHA);
  37  $field      = optional_param('field', '', PARAM_ALPHA);
  38  $instanceid = optional_param('instanceId', 0, PARAM_INT);
  39  $sectionid  = optional_param('sectionId', 0, PARAM_INT);
  40  $previousid = optional_param('previousid', 0, PARAM_INT);
  41  $value      = optional_param('value', 0, PARAM_INT);
  42  $column     = optional_param('column', 0, PARAM_ALPHA);
  43  $id         = optional_param('id', 0, PARAM_INT);
  44  $summary    = optional_param('summary', '', PARAM_RAW);
  45  $sequence   = optional_param('sequence', '', PARAM_SEQUENCE);
  46  $visible    = optional_param('visible', 0, PARAM_INT);
  47  $pageaction = optional_param('action', '', PARAM_ALPHA); // Used to simulate a DELETE command.
  48  $maxmark    = optional_param('maxmark', '', PARAM_FLOAT);
  49  $newheading = optional_param('newheading', '', PARAM_TEXT);
  50  $shuffle    = optional_param('newshuffle', 0, PARAM_INT);
  51  $page       = optional_param('page', '', PARAM_INT);
  52  $ids        = optional_param('ids', '', PARAM_SEQUENCE);
  53  $PAGE->set_url('/mod/quiz/edit-rest.php',
  54          ['quizid' => $quizid, 'class' => $class]);
  55  
  56  require_sesskey();
  57  $quizobj = quiz_settings::create($quizid);
  58  $quiz = $quizobj->get_quiz();
  59  $cm = $quizobj->get_cm();
  60  $course = $quizobj->get_course();
  61  require_login($course, false, $cm);
  62  
  63  $structure = $quizobj->get_structure();
  64  $gradecalculator = $quizobj->get_grade_calculator();
  65  $modcontext = $quizobj->get_context();
  66  
  67  echo $OUTPUT->header(); // Send headers.
  68  
  69  // All these AJAX actions should be logically atomic.
  70  $transaction = $DB->start_delegated_transaction();
  71  
  72  // OK, now let's process the parameters and do stuff
  73  // MDL-10221 the DELETE method is not allowed on some web servers,
  74  // so we simulate it with the action URL param.
  75  $requestmethod = $_SERVER['REQUEST_METHOD'];
  76  if ($pageaction == 'DELETE') {
  77      $requestmethod = 'DELETE';
  78  }
  79  
  80  $result = null;
  81  
  82  switch($requestmethod) {
  83      case 'POST':
  84      case 'GET': // For debugging.
  85          switch ($class) {
  86              case 'section':
  87                  $table = 'quiz_sections';
  88                  $section = $structure->get_section_by_id($id);
  89                  switch ($field) {
  90                      case 'getsectiontitle':
  91                          require_capability('mod/quiz:manage', $modcontext);
  92                          $result = ['instancesection' => $section->heading];
  93                          break;
  94                      case 'updatesectiontitle':
  95                          require_capability('mod/quiz:manage', $modcontext);
  96                          $structure->set_section_heading($id, $newheading);
  97                          $result = ['instancesection' => format_string($newheading)];
  98                          break;
  99                      case 'updateshufflequestions':
 100                          require_capability('mod/quiz:manage', $modcontext);
 101                          $structure->set_section_shuffle($id, $shuffle);
 102                          $result = ['instanceshuffle' => $section->shufflequestions];
 103                          break;
 104                  }
 105                  break;
 106  
 107              case 'resource':
 108                  switch ($field) {
 109                      case 'move':
 110                          require_capability('mod/quiz:manage', $modcontext);
 111                          if (!$previousid) {
 112                              $section = $structure->get_section_by_id($sectionid);
 113                              if ($section->firstslot > 1) {
 114                                  $previousid = $structure->get_slot_id_for_slot($section->firstslot - 1);
 115                                  $page = $structure->get_page_number_for_slot($section->firstslot);
 116                              }
 117                          }
 118                          $structure->move_slot($id, $previousid, $page);
 119                          quiz_delete_previews($quiz);
 120                          $result = ['visible' => true];
 121                          break;
 122  
 123                      case 'getmaxmark':
 124                          require_capability('mod/quiz:manage', $modcontext);
 125                          $slot = $DB->get_record('quiz_slots', ['id' => $id], '*', MUST_EXIST);
 126                          $result = ['instancemaxmark' => quiz_format_question_grade($quiz, $slot->maxmark)];
 127                          break;
 128  
 129                      case 'updatemaxmark':
 130                          require_capability('mod/quiz:manage', $modcontext);
 131                          $slot = $structure->get_slot_by_id($id);
 132                          if ($structure->update_slot_maxmark($slot, $maxmark)) {
 133                              // Grade has really changed.
 134                              quiz_delete_previews($quiz);
 135                              $gradecalculator->recompute_quiz_sumgrades();
 136                              $gradecalculator->recompute_all_attempt_sumgrades();
 137                              $gradecalculator->recompute_all_final_grades();
 138                              quiz_update_grades($quiz, 0, true);
 139                          }
 140                          $result = ['instancemaxmark' => quiz_format_question_grade($quiz, $maxmark),
 141                                  'newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades)];
 142                          break;
 143  
 144                      case 'updatepagebreak':
 145                          require_capability('mod/quiz:manage', $modcontext);
 146                          $slots = $structure->update_page_break($id, $value);
 147                          $json = [];
 148                          foreach ($slots as $slot) {
 149                              $json[$slot->slot] = ['id' => $slot->id, 'slot' => $slot->slot,
 150                                                              'page' => $slot->page];
 151                          }
 152                          $result = ['slots' => $json];
 153                          break;
 154  
 155                      case 'deletemultiple':
 156                          require_capability('mod/quiz:manage', $modcontext);
 157  
 158                          $ids = explode(',', $ids);
 159                          foreach ($ids as $id) {
 160                              $slot = $DB->get_record('quiz_slots', ['quizid' => $quiz->id, 'id' => $id],
 161                                      '*', MUST_EXIST);
 162                              if ($structure->has_use_capability($slot->slot)) {
 163                                  $structure->remove_slot($slot->slot);
 164                              }
 165                          }
 166                          quiz_delete_previews($quiz);
 167                          $gradecalculator->recompute_quiz_sumgrades();
 168  
 169                          $result = ['newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades),
 170                                  'deleted' => true, 'newnumquestions' => $structure->get_question_count()];
 171                          break;
 172  
 173                      case 'updatedependency':
 174                          require_capability('mod/quiz:manage', $modcontext);
 175                          $slot = $structure->get_slot_by_id($id);
 176                          $value = (bool) $value;
 177                          $structure->update_question_dependency($slot->id, $value);
 178                          $result = ['requireprevious' => $value];
 179                          break;
 180                  }
 181                  break;
 182          }
 183          break;
 184  
 185      case 'DELETE':
 186          switch ($class) {
 187              case 'section':
 188                  require_capability('mod/quiz:manage', $modcontext);
 189                  $structure->remove_section_heading($id);
 190                  $result = ['deleted' => true];
 191                  break;
 192  
 193              case 'resource':
 194                  require_capability('mod/quiz:manage', $modcontext);
 195                  if (!$slot = $DB->get_record('quiz_slots', ['quizid' => $quiz->id, 'id' => $id])) {
 196                      throw new moodle_exception('AJAX commands.php: Bad slot ID '.$id);
 197                  }
 198  
 199                  if (!$structure->has_use_capability($slot->slot)) {
 200                      $slotdetail = $structure->get_slot_by_id($slot->id);
 201                      $context = context::instance_by_id($slotdetail->contextid);
 202                      throw new required_capability_exception($context,
 203                          'moodle/question:useall', 'nopermissions', '');
 204                  }
 205                  $structure->remove_slot($slot->slot);
 206                  quiz_delete_previews($quiz);
 207                  $gradecalculator->recompute_quiz_sumgrades();
 208                  $result = ['newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades),
 209                              'deleted' => true, 'newnumquestions' => $structure->get_question_count()];
 210                  break;
 211          }
 212          break;
 213  }
 214  
 215  $transaction->allow_commit();
 216  echo json_encode($result);