mirror of
https://github.com/moodle/moodle.git
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135 lines
4.4 KiB
PHP
135 lines
4.4 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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* This file contains the version information for the comments feedback plugin
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*
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* @package assignfeedback_editpdf
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* @copyright 2012 Davo Smith
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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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defined('MOODLE_INTERNAL') || die();
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global $CFG;
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require_once($CFG->dirroot . '/mod/assign/locallib.php');
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/**
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* Serves assignment feedback and other files.
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*
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* @param mixed $course course or id of the course
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* @param mixed $cm course module or id of the course module
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* @param context $context
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* @param string $filearea
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* @param array $args
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* @param bool $forcedownload
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* @param array $options - List of options affecting file serving.
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* @return bool false if file not found, does not return if found - just send the file
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*/
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function assignfeedback_editpdf_pluginfile(
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$course,
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$cm,
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context $context,
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$filearea,
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$args,
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$forcedownload,
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array $options = array()
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) {
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global $DB;
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if ($filearea === 'systemstamps') {
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if ($context->contextlevel !== CONTEXT_SYSTEM) {
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return false;
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}
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$filename = array_pop($args);
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$filepath = '/' . implode('/', $args) . '/';
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$fs = get_file_storage();
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$file = $fs->get_file($context->id, 'assignfeedback_editpdf', $filearea, 0, $filepath, $filename);
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if (!$file) {
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return false;
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}
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$options['cacheability'] = 'public';
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$options['immutable'] = true;
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send_stored_file($file, null, 0, false, $options);
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}
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if ($context->contextlevel == CONTEXT_MODULE) {
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require_login($course, false, $cm);
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$itemid = (int)array_shift($args);
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$assign = new assign($context, $cm, $course);
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$record = $DB->get_record('assign_grades', array('id' => $itemid), 'userid,assignment', MUST_EXIST);
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$userid = $record->userid;
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if ($assign->get_instance()->id != $record->assignment) {
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return false;
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}
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// Rely on mod_assign checking permissions.
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if (!$assign->can_view_submission($userid)) {
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return false;
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}
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$relativepath = implode('/', $args);
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$fullpath = "/{$context->id}/assignfeedback_editpdf/$filearea/$itemid/$relativepath";
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$fs = get_file_storage();
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if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
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return false;
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}
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// Download MUST be forced - security!
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send_stored_file($file, 0, 0, true, $options);// Check if we want to retrieve the stamps.
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}
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}
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/**
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* Files API hook to remove stale conversion records.
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*
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* When a file is update, its contenthash will change, but its ID
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* remains the same. The document converter API records source file
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* IDs and destination file IDs. When a file is updated, the document
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* converter API has no way of knowing that the content of the file
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* has changed, so it just serves the previously stored destination
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* file.
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*
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* In this hook we check if the contenthash has changed, and if it has
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* we delete the existing conversion so that a new one will be created.
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*
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* @param stdClass $file The updated file record.
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* @param stdClass $filepreupdate The file record pre-update.
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*/
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function assignfeedback_editpdf_after_file_updated(stdClass $file, stdClass $filepreupdate) {
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$contenthashchanged = $file->contenthash !== $filepreupdate->contenthash;
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if ($contenthashchanged && $file->component == 'assignsubmission_file' && $file->filearea == 'submission_files') {
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$fs = get_file_storage();
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$file = $fs->get_file_by_id($file->id);
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$conversions = \core_files\conversion::get_conversions_for_file($file, 'pdf');
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foreach ($conversions as $conversion) {
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if ($conversion->get('id')) {
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$conversion->delete();
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}
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}
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}
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}
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