MDL-23919 mod_data: completionentries can be null
[moodle.git] / mod / quiz / edit_rest.php
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/>.
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  */
25 if (!defined('AJAX_SCRIPT')) {
26     define('AJAX_SCRIPT', true);
27 }
29 require_once(__DIR__ . '/../../config.php');
30 require_once($CFG->dirroot . '/mod/quiz/locallib.php');
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 $PAGE->set_url('/mod/quiz/edit-rest.php',
51         array('quizid' => $quizid, 'class' => $class));
53 require_sesskey();
54 $quiz = $DB->get_record('quiz', array('id' => $quizid), '*', MUST_EXIST);
55 $cm = get_coursemodule_from_instance('quiz', $quiz->id, $quiz->course);
56 $course = $DB->get_record('course', array('id' => $quiz->course), '*', MUST_EXIST);
57 require_login($course, false, $cm);
59 $quizobj = new quiz($quiz, $cm, $course);
60 $structure = $quizobj->get_structure();
61 $modcontext = context_module::instance($cm->id);
63 echo $OUTPUT->header(); // Send headers.
65 // OK, now let's process the parameters and do stuff
66 // MDL-10221 the DELETE method is not allowed on some web servers,
67 // so we simulate it with the action URL param.
68 $requestmethod = $_SERVER['REQUEST_METHOD'];
69 if ($pageaction == 'DELETE') {
70     $requestmethod = 'DELETE';
71 }
73 switch($requestmethod) {
74     case 'POST':
75     case 'GET': // For debugging.
76         switch ($class) {
77             case 'section':
78                 $table = 'quiz_sections';
79                 $section = $structure->get_section_by_id($id);
80                 switch ($field) {
81                     case 'getsectiontitle':
82                         require_capability('mod/quiz:manage', $modcontext);
83                         echo json_encode(array('instancesection' => $section->heading));
84                         break;
85                     case 'updatesectiontitle':
86                         require_capability('mod/quiz:manage', $modcontext);
87                         $structure->set_section_heading($id, $newheading);
88                         echo json_encode(array('instancesection' => format_string($newheading)));
89                         break;
90                     case 'updateshufflequestions':
91                         require_capability('mod/quiz:manage', $modcontext);
92                         $structure->set_section_shuffle($id, $shuffle);
93                         echo json_encode(array('instanceshuffle' => $section->shufflequestions));
94                         break;
95                 }
96                 break;
98             case 'resource':
99                 switch ($field) {
100                     case 'move':
101                         require_capability('mod/quiz:manage', $modcontext);
102                         if (!$previousid) {
103                             $section = $structure->get_section_by_id($sectionid);
104                             if ($section->firstslot > 1) {
105                                 $previousid = $structure->get_slot_id_for_slot($section->firstslot - 1);
106                                 $page = $structure->get_page_number_for_slot($section->firstslot);
107                             }
108                         }
109                         $structure->move_slot($id, $previousid, $page);
110                         quiz_delete_previews($quiz);
111                         echo json_encode(array('visible' => true));
112                         break;
114                     case 'getmaxmark':
115                         require_capability('mod/quiz:manage', $modcontext);
116                         $slot = $DB->get_record('quiz_slots', array('id' => $id), '*', MUST_EXIST);
117                         echo json_encode(array('instancemaxmark' =>
118                                 quiz_format_question_grade($quiz, $slot->maxmark)));
119                         break;
121                     case 'updatemaxmark':
122                         require_capability('mod/quiz:manage', $modcontext);
123                         $slot = $structure->get_slot_by_id($id);
124                         if ($structure->update_slot_maxmark($slot, $maxmark)) {
125                             // Grade has really changed.
126                             quiz_delete_previews($quiz);
127                             quiz_update_sumgrades($quiz);
128                             quiz_update_all_attempt_sumgrades($quiz);
129                             quiz_update_all_final_grades($quiz);
130                             quiz_update_grades($quiz, 0, true);
131                         }
132                         echo json_encode(array('instancemaxmark' => quiz_format_question_grade($quiz, $maxmark),
133                                 'newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades)));
134                         break;
136                     case 'updatepagebreak':
137                         require_capability('mod/quiz:manage', $modcontext);
138                         $slots = $structure->update_page_break($id, $value);
139                         $json = array();
140                         foreach ($slots as $slot) {
141                             $json[$slot->slot] = array('id' => $slot->id, 'slot' => $slot->slot,
142                                                             'page' => $slot->page);
143                         }
144                         echo json_encode(array('slots' => $json));
145                         break;
147                     case 'updatedependency':
148                         require_capability('mod/quiz:manage', $modcontext);
149                         $slot = $structure->get_slot_by_id($id);
150                         $value = (bool) $value;
151                         $structure->update_question_dependency($slot->id, $value);
152                         echo json_encode(array('requireprevious' => $value));
153                         break;
154                 }
155                 break;
156         }
157         break;
159     case 'DELETE':
160         switch ($class) {
161             case 'section':
162                 require_capability('mod/quiz:manage', $modcontext);
163                 $structure->remove_section_heading($id);
164                 echo json_encode(array('deleted' => true));
165                 break;
167             case 'resource':
168                 require_capability('mod/quiz:manage', $modcontext);
169                 if (!$slot = $DB->get_record('quiz_slots', array('quizid' => $quiz->id, 'id' => $id))) {
170                     throw new moodle_exception('AJAX commands.php: Bad slot ID '.$id);
171                 }
172                 $structure->remove_slot($slot->slot);
173                 quiz_delete_previews($quiz);
174                 quiz_update_sumgrades($quiz);
175                 echo json_encode(array('newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades),
176                             'deleted' => true, 'newnumquestions' => $structure->get_question_count()));
177                 break;
178         }
179         break;