h5p/ajax.php

   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  * Responsible for handling AJAX requests related to H5P.
  19  *
  20  * @package    core_h5p
  21  * @copyright  2020 Victor Deniz <victor@moodle.com>, based on code by Joubel AS
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25 use core_h5p\factory;
  26 use core_h5p\framework;
  27 use core_h5p\local\library\autoloader;
  28 use Moodle\H5PCore;
  29 use Moodle\H5PEditorEndpoints;
  30
  31 define('AJAX_SCRIPT', true);
  32
  33 require(__DIR__ . '/../config.php');
  34 require_once($CFG->libdir . '/filelib.php');
  35
  36 if (!confirm_sesskey()) {
  37     autoloader::register();
  38     H5PCore::ajaxError(get_string('invalidsesskey', 'error'));
  39     header('HTTP/1.1 403 Forbidden');
  40     return;
  41 }
  42 require_login();
  43
  44 $action = required_param('action', PARAM_ALPHA);
  45
  46 $factory = new factory();
  47 $editor = $factory->get_editor();
  48
  49 // Set context to default system context.
  50 $PAGE->set_context(null);
  51
  52 switch ($action) {
  53     // Load list of libraries or details for library.
  54     case 'libraries':
  55         // Get parameters.
  56         $name = optional_param('machineName', '', PARAM_TEXT);
  57         $major = optional_param('majorVersion', 0, PARAM_INT);
  58         $minor = optional_param('minorVersion', 0, PARAM_INT);
  59
  60         // Normalise Moodle language using underscore, as opposed to H5P which uses dash.
  61         $language = optional_param('default-language', null, PARAM_RAW);
  62         $language = clean_param(str_replace('-', '_', $language), PARAM_LANG);
  63
  64         if (!empty($name)) {
  65             $editor->ajax->action(H5PEditorEndpoints::SINGLE_LIBRARY, $name,
  66                 $major, $minor, framework::get_language(), '', '', $language);
  67         } else {
  68             $editor->ajax->action(H5PEditorEndpoints::LIBRARIES);
  69         }
  70
  71         break;
  72
  73     // Load content type cache list to display available libraries in hub.
  74     case 'contenttypecache':
  75         $editor->ajax->action(H5PEditorEndpoints::CONTENT_TYPE_CACHE);
  76         break;
  77
  78     // Handle file upload through the editor.
  79     // This endpoint needs a token that only users with H5P editor access could get.
  80     // TODO: MDL-68907 to check capabilities.
  81     case 'files':
  82         $token = required_param('token', PARAM_RAW);
  83         $contentid = required_param('contentId', PARAM_INT);
  84
  85         $maxsize = get_max_upload_file_size($CFG->maxbytes);
  86         // Check size of each uploaded file and scan for viruses.
  87         foreach ($_FILES as $uploadedfile) {
  88             $filename = clean_param($uploadedfile['name'], PARAM_FILE);
  89             if ($uploadedfile['size'] > $maxsize) {
  90                 H5PCore::ajaxError(get_string('maxbytesfile', 'error', ['file' => $filename, 'size' => display_size($maxsize, 0)]));
  91                 return;
  92             }
  93             \core\antivirus\manager::scan_file($uploadedfile['tmp_name'], $filename, true);
  94         }
  95
  96         $editor->ajax->action(H5PEditorEndpoints::FILES, $token, $contentid);
  97         break;
  98
  99     // Get the $language libraries translations.
 100     case 'translations':
 101         $language = required_param('language', PARAM_RAW);
 102         $editor->ajax->action(H5PEditorEndpoints::TRANSLATIONS, $language);
 103         break;
 104
 105     // Handle filtering of parameters through AJAX.
 106     case 'filter':
 107         $token = required_param('token', PARAM_RAW);
 108         $libraryparameters = required_param('libraryParameters', PARAM_RAW);
 109
 110         $editor->ajax->action(H5PEditorEndpoints::FILTER, $token, $libraryparameters);
 111         break;
 112
 113     // Throw error if AJAX action is not handled.
 114     default:
 115         throw new coding_exception('Unhandled AJAX');
 116         break;
 117 }