MDL-68665 assignfeedback_editpdf: Add filearea to persist stamps
[moodle.git] / mod / assign / feedback / editpdf / 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 version information for the comments feedback plugin
19 *
20 * @package assignfeedback_editpdf
21 * @copyright 2012 Davo Smith
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
23 */
24
25defined('MOODLE_INTERNAL') || die();
26
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27global $CFG;
28require_once($CFG->dirroot . '/mod/assign/locallib.php');
29
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30/**
31 * Serves assignment feedback and other files.
32 *
33 * @param mixed $course course or id of the course
34 * @param mixed $cm course module or id of the course module
35 * @param context $context
36 * @param string $filearea
37 * @param array $args
38 * @param bool $forcedownload
c593a0b0 39 * @param array $options - List of options affecting file serving.
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40 * @return bool false if file not found, does not return if found - just send the file
41 */
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42function assignfeedback_editpdf_pluginfile(
43 $course,
44 $cm,
45 context $context,
46 $filearea,
47 $args,
48 $forcedownload,
49 array $options = array()
50) {
51 global $DB;
52 if ($filearea === 'systemstamps') {
1343d84c 53
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54 if ($context->contextlevel !== CONTEXT_SYSTEM) {
55 return false;
56 }
1343d84c 57
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58 $filename = array_pop($args);
59 $filepath = '/' . implode('/', $args) . '/';
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60
61 $fs = get_file_storage();
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62 $file = $fs->get_file($context->id, 'assignfeedback_editpdf', $filearea, 0, $filepath, $filename);
63 if (!$file) {
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64 return false;
65 }
66
67 $options['cacheability'] = 'public';
68 $options['immutable'] = true;
69
70 send_stored_file($file, 0, 0, true, $options);
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71 }
72
73 if ($context->contextlevel == CONTEXT_MODULE) {
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74
75 require_login($course, false, $cm);
76 $itemid = (int)array_shift($args);
77
166fa40a 78 $assign = new assign($context, $cm, $course);
5c386472 79
166fa40a 80 $record = $DB->get_record('assign_grades', array('id' => $itemid), 'userid,assignment', MUST_EXIST);
5c386472 81 $userid = $record->userid;
166fa40a 82 if ($assign->get_instance()->id != $record->assignment) {
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83 return false;
84 }
85
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86 // Rely on mod_assign checking permissions.
87 if (!$assign->can_view_submission($userid)) {
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88 return false;
89 }
90
91 $relativepath = implode('/', $args);
92
93 $fullpath = "/{$context->id}/assignfeedback_editpdf/$filearea/$itemid/$relativepath";
94
95 $fs = get_file_storage();
96 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
97 return false;
98 }
99 // Download MUST be forced - security!
c593a0b0 100 send_stored_file($file, 0, 0, true, $options);// Check if we want to retrieve the stamps.
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101 }
102
103}