Merge branch 'MDL-37030-master' of git://github.com/damyon/moodle
[moodle.git] / mod / assign / submission / onlinetext / lib.php
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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 * This file contains the moodle hooks for the submission onlinetext plugin
19 *
20 * @package assignsubmission_onlinetext
21 * @copyright 2012 NetSpot {@link http://www.netspot.com.au}
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23 */
24defined('MOODLE_INTERNAL') || die();
25
26/**
27 * Serves assignment submissions and other files.
28 *
29 * @param mixed $course course or id of the course
30 * @param mixed $cm course module or id of the course module
31 * @param context $context
32 * @param string $filearea
33 * @param array $args
34 * @param bool $forcedownload
35 * @return bool false if file not found, does not return if found - just send the file
36 */
37function assignsubmission_onlinetext_pluginfile($course, $cm, context $context, $filearea, $args, $forcedownload) {
38 global $USER, $DB;
39
40 if ($context->contextlevel != CONTEXT_MODULE) {
41 return false;
42 }
43
44 require_login($course, false, $cm);
45 $itemid = (int)array_shift($args);
46 $record = $DB->get_record('assign_submission', array('id'=>$itemid), 'userid, assignment', MUST_EXIST);
47 $userid = $record->userid;
48
49 if (!$assign = $DB->get_record('assign', array('id'=>$cm->instance))) {
50 return false;
51 }
52
53 if ($assign->id != $record->assignment) {
54 return false;
55 }
56
e5403f8c 57 // Check is users submission or has grading permission.
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58 if ($USER->id != $userid and !has_capability('mod/assign:grade', $context)) {
59 return false;
60 }
61
62 $relativepath = implode('/', $args);
63
64 $fullpath = "/{$context->id}/assignsubmission_onlinetext/$filearea/$itemid/$relativepath";
65
66 $fs = get_file_storage();
67 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
68 return false;
69 }
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70
71 // Download MUST be forced - security!
72 send_stored_file($file, 0, 0, true);
bbd0e548 73}