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109 lines
3.7 KiB
PHP
109 lines
3.7 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Library functions used by question/preview.php.
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*
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* @package core
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* @subpackage questionengine
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* @copyright 2010 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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/**
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* Called via pluginfile.php -> question_pluginfile to serve files belonging to
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* a question in a question_attempt when that attempt is a preview.
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*
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* @param object $course course settings object
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* @param object $context context object
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* @param string $component the name of the component we are serving files for.
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* @param string $filearea the name of the file area.
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* @param array $args the remaining bits of the file path.
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* @param bool $forcedownload whether the user must be forced to download the file.
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* @return bool false if file not found, does not return if found - justsend the file
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*/
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function question_preview_question_pluginfile($course, $context, $component,
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$filearea, $attemptid, $questionid, $args, $forcedownload) {
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global $USER, $SESSION, $DB, $CFG;
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require_once($CFG->dirroot . '/mod/quiz/locallib.php');
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if (!$question = $DB->get_record('question', array('id' => $questionid))) {
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return send_file_not_found();
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}
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if (!question_has_capability_on($question, 'use', $question->category)) {
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send_file_not_found();
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}
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if (!isset($SESSION->quizpreview->states) || $SESSION->quizpreview->questionid != $questionid) {
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send_file_not_found();
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}
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$states = end($SESSION->quizpreview->states);
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if (!array_key_exists($question->id, $states)) {
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send_file_not_found();
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}
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$state = $states[$question->id];
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// Build fake cmoptions
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$quiz = new cmoptions;
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$quiz->id = 0;
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$quiz->review = get_config('quiz', 'review');
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if (empty($course->id)) {
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$quiz->course = SITEID;
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} else {
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$quiz->course = $course->id;
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}
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$quiz->decimalpoints = get_config('quiz', 'decimalpoints');
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$questions[$question->id] = $question;
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get_question_options($questions);
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// Build fake attempt
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$timenow = time();
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$attempt = new stdClass();
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$attempt->quiz = $quiz->id;
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$attempt->userid = $USER->id;
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$attempt->attempt = 0;
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$attempt->sumgrades = 0;
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$attempt->timestart = $timenow;
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$attempt->timefinish = 0;
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$attempt->timemodified = $timenow;
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$attempt->uniqueid = 0;
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$attempt->id = 0;
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$attempt->layout = $question->id;
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$options = quiz_get_renderoptions($quiz, $attempt, $context, $state);
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$options->noeditlink = true;
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// XXX: mulitichoice type needs quiz id to get maxgrade
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$options->quizid = 0;
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if (!question_check_file_access($question, $state, $options, $context->id, $component,
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$filearea, $args, $forcedownload)) {
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send_file_not_found();
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}
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$fs = get_file_storage();
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$relativepath = implode('/', $args);
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$fullpath = "/$context->id/$component/$filearea/$relativepath";
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if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
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send_file_not_found();
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}
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send_stored_file($file, 0, 0, $forcedownload);
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}
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