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Differences Between: [Versions 310 and 401] [Versions 311 and 401] [Versions 39 and 401] [Versions 401 and 402] [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  if (!defined('AJAX_SCRIPT')) {
  26      define('AJAX_SCRIPT', true);
  27  }
  28  
  29  require_once(__DIR__ . '/../../config.php');
  30  require_once($CFG->dirroot . '/mod/quiz/locallib.php');
  31  
  32  // Initialise ALL the incoming parameters here, up front.
  33  $quizid     = required_param('quizid', PARAM_INT);
  34  $class      = required_param('class', PARAM_ALPHA);
  35  $field      = optional_param('field', '', PARAM_ALPHA);
  36  $instanceid = optional_param('instanceId', 0, PARAM_INT);
  37  $sectionid  = optional_param('sectionId', 0, PARAM_INT);
  38  $previousid = optional_param('previousid', 0, PARAM_INT);
  39  $value      = optional_param('value', 0, PARAM_INT);
  40  $column     = optional_param('column', 0, PARAM_ALPHA);
  41  $id         = optional_param('id', 0, PARAM_INT);
  42  $summary    = optional_param('summary', '', PARAM_RAW);
  43  $sequence   = optional_param('sequence', '', PARAM_SEQUENCE);
  44  $visible    = optional_param('visible', 0, PARAM_INT);
  45  $pageaction = optional_param('action', '', PARAM_ALPHA); // Used to simulate a DELETE command.
  46  $maxmark    = optional_param('maxmark', '', PARAM_FLOAT);
  47  $newheading = optional_param('newheading', '', PARAM_TEXT);
  48  $shuffle    = optional_param('newshuffle', 0, PARAM_INT);
  49  $page       = optional_param('page', '', PARAM_INT);
  50  $ids        = optional_param('ids', '', PARAM_SEQUENCE);
  51  $PAGE->set_url('/mod/quiz/edit-rest.php',
  52          array('quizid' => $quizid, 'class' => $class));
  53  
  54  require_sesskey();
  55  $quiz = $DB->get_record('quiz', array('id' => $quizid), '*', MUST_EXIST);
  56  $cm = get_coursemodule_from_instance('quiz', $quiz->id, $quiz->course);
  57  $course = $DB->get_record('course', array('id' => $quiz->course), '*', MUST_EXIST);
  58  require_login($course, false, $cm);
  59  
  60  $quizobj = new quiz($quiz, $cm, $course);
  61  $structure = $quizobj->get_structure();
  62  $modcontext = context_module::instance($cm->id);
  63  
  64  echo $OUTPUT->header(); // Send headers.
  65  
  66  // All these AJAX actions should be logically atomic.
  67  $transaction = $DB->start_delegated_transaction();
  68  
  69  // OK, now let's process the parameters and do stuff
  70  // MDL-10221 the DELETE method is not allowed on some web servers,
  71  // so we simulate it with the action URL param.
  72  $requestmethod = $_SERVER['REQUEST_METHOD'];
  73  if ($pageaction == 'DELETE') {
  74      $requestmethod = 'DELETE';
  75  }
  76  
  77  $result = null;
  78  
  79  switch($requestmethod) {
  80      case 'POST':
  81      case 'GET': // For debugging.
  82          switch ($class) {
  83              case 'section':
  84                  $table = 'quiz_sections';
  85                  $section = $structure->get_section_by_id($id);
  86                  switch ($field) {
  87                      case 'getsectiontitle':
  88                          require_capability('mod/quiz:manage', $modcontext);
  89                          $result = array('instancesection' => $section->heading);
  90                          break;
  91                      case 'updatesectiontitle':
  92                          require_capability('mod/quiz:manage', $modcontext);
  93                          $structure->set_section_heading($id, $newheading);
  94                          $result = array('instancesection' => format_string($newheading));
  95                          break;
  96                      case 'updateshufflequestions':
  97                          require_capability('mod/quiz:manage', $modcontext);
  98                          $structure->set_section_shuffle($id, $shuffle);
  99                          $result = array('instanceshuffle' => $section->shufflequestions);
 100                          break;
 101                  }
 102                  break;
 103  
 104              case 'resource':
 105                  switch ($field) {
 106                      case 'move':
 107                          require_capability('mod/quiz:manage', $modcontext);
 108                          if (!$previousid) {
 109                              $section = $structure->get_section_by_id($sectionid);
 110                              if ($section->firstslot > 1) {
 111                                  $previousid = $structure->get_slot_id_for_slot($section->firstslot - 1);
 112                                  $page = $structure->get_page_number_for_slot($section->firstslot);
 113                              }
 114                          }
 115                          $structure->move_slot($id, $previousid, $page);
 116                          quiz_delete_previews($quiz);
 117                          $result = array('visible' => true);
 118                          break;
 119  
 120                      case 'getmaxmark':
 121                          require_capability('mod/quiz:manage', $modcontext);
 122                          $slot = $DB->get_record('quiz_slots', array('id' => $id), '*', MUST_EXIST);
 123                          $result = array('instancemaxmark' => quiz_format_question_grade($quiz, $slot->maxmark));
 124                          break;
 125  
 126                      case 'updatemaxmark':
 127                          require_capability('mod/quiz:manage', $modcontext);
 128                          $slot = $structure->get_slot_by_id($id);
 129                          if ($structure->update_slot_maxmark($slot, $maxmark)) {
 130                              // Grade has really changed.
 131                              quiz_delete_previews($quiz);
 132                              quiz_update_sumgrades($quiz);
 133                              quiz_update_all_attempt_sumgrades($quiz);
 134                              quiz_update_all_final_grades($quiz);
 135                              quiz_update_grades($quiz, 0, true);
 136                          }
 137                          $result = array('instancemaxmark' => quiz_format_question_grade($quiz, $maxmark),
 138                                  'newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades));
 139                          break;
 140  
 141                      case 'updatepagebreak':
 142                          require_capability('mod/quiz:manage', $modcontext);
 143                          $slots = $structure->update_page_break($id, $value);
 144                          $json = array();
 145                          foreach ($slots as $slot) {
 146                              $json[$slot->slot] = array('id' => $slot->id, 'slot' => $slot->slot,
 147                                                              'page' => $slot->page);
 148                          }
 149                          $result = array('slots' => $json);
 150                          break;
 151  
 152                      case 'deletemultiple':
 153                          require_capability('mod/quiz:manage', $modcontext);
 154  
 155                          $ids = explode(',', $ids);
 156                          foreach ($ids as $id) {
 157                              $slot = $DB->get_record('quiz_slots', array('quizid' => $quiz->id, 'id' => $id),
 158                                      '*', MUST_EXIST);
 159                              if ($structure->has_use_capability($slot->slot)) {
 160                                  $structure->remove_slot($slot->slot);
 161                              }
 162                          }
 163                          quiz_delete_previews($quiz);
 164                          quiz_update_sumgrades($quiz);
 165  
 166                          $result = array('newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades),
 167                                  'deleted' => true, 'newnumquestions' => $structure->get_question_count());
 168                          break;
 169  
 170                      case 'updatedependency':
 171                          require_capability('mod/quiz:manage', $modcontext);
 172                          $slot = $structure->get_slot_by_id($id);
 173                          $value = (bool) $value;
 174                          $structure->update_question_dependency($slot->id, $value);
 175                          $result = array('requireprevious' => $value);
 176                          break;
 177                  }
 178                  break;
 179          }
 180          break;
 181  
 182      case 'DELETE':
 183          switch ($class) {
 184              case 'section':
 185                  require_capability('mod/quiz:manage', $modcontext);
 186                  $structure->remove_section_heading($id);
 187                  $result = array('deleted' => true);
 188                  break;
 189  
 190              case 'resource':
 191                  require_capability('mod/quiz:manage', $modcontext);
 192                  if (!$slot = $DB->get_record('quiz_slots', array('quizid' => $quiz->id, 'id' => $id))) {
 193                      throw new moodle_exception('AJAX commands.php: Bad slot ID '.$id);
 194                  }
 195  
 196                  if (!$structure->has_use_capability($slot->slot)) {
 197                      $slotdetail = $structure->get_slot_by_id($slot->id);
 198                      $context = context::instance_by_id($slotdetail->contextid);
 199                      throw new required_capability_exception($context,
 200                          'moodle/question:useall', 'nopermissions', '');
 201                  }
 202                  $structure->remove_slot($slot->slot);
 203                  quiz_delete_previews($quiz);
 204                  quiz_update_sumgrades($quiz);
 205                  $result = array('newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades),
 206                              'deleted' => true, 'newnumquestions' => $structure->get_question_count());
 207                  break;
 208          }
 209          break;
 210  }
 211  
 212  $transaction->allow_commit();
 213  echo json_encode($result);