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edit_rest.php
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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Rest endpoint for ajax editing of quiz structure.
*
* @package mod_quiz
* @copyright 1999 Martin Dougiamas http://dougiamas.com
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
if (!defined('AJAX_SCRIPT')) {
define('AJAX_SCRIPT', true);
}
require_once(__DIR__ . '/../../config.php');
require_once($CFG->dirroot . '/mod/quiz/locallib.php');
// Initialise ALL the incoming parameters here, up front.
$quizid = required_param('quizid', PARAM_INT);
$class = required_param('class', PARAM_ALPHA);
$field = optional_param('field', '', PARAM_ALPHA);
$instanceid = optional_param('instanceId', 0, PARAM_INT);
$sectionid = optional_param('sectionId', 0, PARAM_INT);
$previousid = optional_param('previousid', 0, PARAM_INT);
$value = optional_param('value', 0, PARAM_INT);
$column = optional_param('column', 0, PARAM_ALPHA);
$id = optional_param('id', 0, PARAM_INT);
$summary = optional_param('summary', '', PARAM_RAW);
$sequence = optional_param('sequence', '', PARAM_SEQUENCE);
$visible = optional_param('visible', 0, PARAM_INT);
$pageaction = optional_param('action', '', PARAM_ALPHA); // Used to simulate a DELETE command.
$maxmark = optional_param('maxmark', '', PARAM_FLOAT);
$newheading = optional_param('newheading', '', PARAM_TEXT);
$shuffle = optional_param('newshuffle', 0, PARAM_INT);
$page = optional_param('page', '', PARAM_INT);
$ids = optional_param('ids', '', PARAM_SEQUENCE);
$PAGE->set_url('/mod/quiz/edit-rest.php',
array('quizid' => $quizid, 'class' => $class));
require_sesskey();
$quiz = $DB->get_record('quiz', array('id' => $quizid), '*', MUST_EXIST);
$cm = get_coursemodule_from_instance('quiz', $quiz->id, $quiz->course);
$course = $DB->get_record('course', array('id' => $quiz->course), '*', MUST_EXIST);
require_login($course, false, $cm);
$quizobj = new quiz($quiz, $cm, $course);
$structure = $quizobj->get_structure();
$modcontext = context_module::instance($cm->id);
echo $OUTPUT->header(); // Send headers.
// All these AJAX actions should be logically atomic.
$transaction = $DB->start_delegated_transaction();
// OK, now let's process the parameters and do stuff
// MDL-10221 the DELETE method is not allowed on some web servers,
// so we simulate it with the action URL param.
$requestmethod = $_SERVER['REQUEST_METHOD'];
if ($pageaction == 'DELETE') {
$requestmethod = 'DELETE';
}
$result = null;
switch($requestmethod) {
case 'POST':
case 'GET': // For debugging.
switch ($class) {
case 'section':
$table = 'quiz_sections';
$section = $structure->get_section_by_id($id);
switch ($field) {
case 'getsectiontitle':
require_capability('mod/quiz:manage', $modcontext);
$result = array('instancesection' => $section->heading);
break;
case 'updatesectiontitle':
require_capability('mod/quiz:manage', $modcontext);
$structure->set_section_heading($id, $newheading);
$result = array('instancesection' => format_string($newheading));
break;
case 'updateshufflequestions':
require_capability('mod/quiz:manage', $modcontext);
$structure->set_section_shuffle($id, $shuffle);
$result = array('instanceshuffle' => $section->shufflequestions);
break;
}
break;
case 'resource':
switch ($field) {
case 'move':
require_capability('mod/quiz:manage', $modcontext);
if (!$previousid) {
$section = $structure->get_section_by_id($sectionid);
if ($section->firstslot > 1) {
$previousid = $structure->get_slot_id_for_slot($section->firstslot - 1);
$page = $structure->get_page_number_for_slot($section->firstslot);
}
}
$structure->move_slot($id, $previousid, $page);
quiz_delete_previews($quiz);
$result = array('visible' => true);
break;
case 'getmaxmark':
require_capability('mod/quiz:manage', $modcontext);
$slot = $DB->get_record('quiz_slots', array('id' => $id), '*', MUST_EXIST);
$result = array('instancemaxmark' => quiz_format_question_grade($quiz, $slot->maxmark));
break;
case 'updatemaxmark':
require_capability('mod/quiz:manage', $modcontext);
$slot = $structure->get_slot_by_id($id);
if ($structure->update_slot_maxmark($slot, $maxmark)) {
// Grade has really changed.
quiz_delete_previews($quiz);
quiz_update_sumgrades($quiz);
quiz_update_all_attempt_sumgrades($quiz);
quiz_update_all_final_grades($quiz);
quiz_update_grades($quiz, 0, true);
}
$result = array('instancemaxmark' => quiz_format_question_grade($quiz, $maxmark),
'newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades));
break;
case 'updatepagebreak':
require_capability('mod/quiz:manage', $modcontext);
$slots = $structure->update_page_break($id, $value);
$json = array();
foreach ($slots as $slot) {
$json[$slot->slot] = array('id' => $slot->id, 'slot' => $slot->slot,
'page' => $slot->page);
}
$result = array('slots' => $json);
break;
case 'deletemultiple':
require_capability('mod/quiz:manage', $modcontext);
$ids = explode(',', $ids);
foreach ($ids as $id) {
$slot = $DB->get_record('quiz_slots', array('quizid' => $quiz->id, 'id' => $id),
'*', MUST_EXIST);
if (quiz_has_question_use($quiz, $slot->slot)) {
$structure->remove_slot($slot->slot);
}
}
quiz_delete_previews($quiz);
quiz_update_sumgrades($quiz);
$result = array('newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades),
'deleted' => true, 'newnumquestions' => $structure->get_question_count());
break;
case 'updatedependency':
require_capability('mod/quiz:manage', $modcontext);
$slot = $structure->get_slot_by_id($id);
$value = (bool) $value;
$structure->update_question_dependency($slot->id, $value);
$result = array('requireprevious' => $value);
break;
}
break;
}
break;
case 'DELETE':
switch ($class) {
case 'section':
require_capability('mod/quiz:manage', $modcontext);
$structure->remove_section_heading($id);
$result = array('deleted' => true);
break;
case 'resource':
require_capability('mod/quiz:manage', $modcontext);
if (!$slot = $DB->get_record('quiz_slots', array('quizid' => $quiz->id, 'id' => $id))) {
throw new moodle_exception('AJAX commands.php: Bad slot ID '.$id);
}
$structure->remove_slot($slot->slot);
quiz_delete_previews($quiz);
quiz_update_sumgrades($quiz);
$result = array('newsummarks' => quiz_format_grade($quiz, $quiz->sumgrades),
'deleted' => true, 'newnumquestions' => $structure->get_question_count());
break;
}
break;
}
$transaction->allow_commit();
echo json_encode($result);