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efrain |
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<?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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* Callbacks.
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*
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* @package core_h5p
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* @copyright 2019 Bas Brands <bas@moodle.com>
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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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use core_h5p\local\library\autoloader;
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/**
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* Serve the files from the core_h5p file areas.
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*
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* @package core_h5p
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* @category files
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*
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* @param stdClass $course the course object
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* @param stdClass $cm the course module object
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* @param stdClass $context the newmodule's context
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* @param string $filearea the name of the file area
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* @param array $args extra arguments (itemid, path)
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* @param bool $forcedownload whether or not force download
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* @param array $options additional options affecting the file serving
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*
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* @return bool Returns false if we don't find a file.
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*/
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function core_h5p_pluginfile($course, $cm, $context, string $filearea, array $args, bool $forcedownload,
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array $options = []): bool {
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global $DB;
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// Require classes from H5P third party library
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autoloader::register();
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$filesettingsset = false;
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switch ($filearea) {
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default:
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return false; // Invalid file area.
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case \core_h5p\file_storage::LIBRARY_FILEAREA:
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if ($context->contextlevel != CONTEXT_SYSTEM) {
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return false; // Invalid context because the libraries are loaded always in the context system.
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}
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$itemid = null;
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// The files that can be delivered to this function are unfortunately out of our control. Some of the
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// references are embedded into the JavaScript of the files and we have no ability to inject an item id.
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// We also don't know the location of the item id when we do include it, so we look for the first numeric
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// value and try to serve that file.
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foreach ($args as $key => $value) {
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if (is_numeric($value)) {
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$itemid = $value;
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unset($args[$key]);
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break;
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}
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}
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if (!isset($itemid)) {
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// We didn't find an item id to use, so we fall back to retrieving the record using all the other
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// fields. The combination of component, filearea, filepath, and filename is enough for a unique
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// record.
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$filename = array_pop($args);
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$filepath = '/' . implode('/', $args) . '/';
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$itemid = $DB->get_field('files', 'itemid', [
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'component' => \core_h5p\file_storage::COMPONENT,
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'filearea' => \core_h5p\file_storage::LIBRARY_FILEAREA,
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'filepath' => $filepath,
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'filename' => $filename
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]);
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$filesettingsset = true;
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}
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break;
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case \core_h5p\file_storage::CONTENT_FILEAREA:
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if ($context->contextlevel != CONTEXT_SYSTEM) {
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return false; // Invalid context because the content files are loaded always in the context system.
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}
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$itemid = array_shift($args);
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break;
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case \core_h5p\file_storage::CACHED_ASSETS_FILEAREA:
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case \core_h5p\file_storage::EXPORT_FILEAREA:
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case \core_h5p\file_storage::CSS_FILEAREA:
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$itemid = 0;
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break;
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}
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if (!$filesettingsset) {
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$filename = array_pop($args);
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$filepath = (!$args ? '/' : '/' . implode('/', $args) . '/');
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}
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$fs = get_file_storage();
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$file = $fs->get_file($context->id, \core_h5p\file_storage::COMPONENT, $filearea, $itemid, $filepath, $filename);
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if (!$file) {
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return false; // No such file.
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}
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send_stored_file($file, null, 0, $forcedownload, $options);
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return true;
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}
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