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  • filter.php NaN GiB
    <?php
    // This file is part of Moodle - http://moodle.org/
    //
    // Moodle is free software: you can redistribute it and/or modify
    // it under the terms of the GNU General Public License as published by
    // the Free Software Foundation, either version 3 of the License, or
    // (at your option) any later version.
    //
    // Moodle is distributed in the hope that it will be useful,
    // but WITHOUT ANY WARRANTY; without even the implied warranty of
    // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    // GNU General Public License for more details.
    //
    // You should have received a copy of the GNU General Public License
    // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
    
    /**
     *  Opencast filtering
     *
     *  This filter will replace any links to opencast videos with the opencast theodul pass player.
     *
     * @package    filter
     * @subpackage opencast
     * @copyright  2017 Tamara Gunkel
     * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
     */
    
    defined('MOODLE_INTERNAL') || die();
    require_once($CFG->dirroot . '/filter/opencast/lib.php');
    require_once($CFG->libdir . '/oauthlib.php');
    
    /**
     * Automatic opencast videos filter class.
     *
     * @package    filter
     * @subpackage opencast
     * @copyright  2017 Tamara Gunkel
     * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
     */
    class filter_opencast extends moodle_text_filter {
    
        private static $loginrendered = false;
    
        public function filter($text, array $options = array()) {
            global $PAGE;
    
            if (stripos($text, '</video>') === false) {
                // Performance shortcut - if there are no </video> tags, nothing can match.
                return $text;
            }
    
            // Looking for tags.
            $matches = preg_split('/(<[^>]*>)/i', $text, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
    
            if ($matches) {
                $renderer = $PAGE->get_renderer('filter_opencast');
    
                // Login if user is not logged in yet.
                $loggedin = true;
                if (!isset($_COOKIE['JSESSIONID']) && !self::$loginrendered) {
                    // Login and set cookie.
                    filter_opencast_login();
                    $loggedin = false;
                    self::$loginrendered = true;
                }
    
                $video = false;
    
                foreach ($matches as $match) {
                    if (substr($match, 0, 6) === "<video") {
                        $video = true;
                    } else if ($video) {
                        $video = false;
                        if (substr($match, 0, 7) === "<source") {
                            // Get baseurl
                            $baseurl = get_config('filter_opencast', 'engageurl');
    
                            // Check if video is from opencast.
                            if (strpos($match, $baseurl) === false) {
                                continue;
                            }
    
                            if (strpos($baseurl, 'http') !== 0) {
                                $baseurl = 'http://' . $baseurl;
                            }
    
                            // Extract id.
                            $id = substr($match, strpos($match, 'api/') + 4, 36);
    
                            // Create link to video.
                            $playerurl = get_config('filter_opencast', 'playerurl');
                            $link = $baseurl . $playerurl .'?id=' . $id. '&mode=embed';
    
                            // Create source with embedded mode
                            $src = $link;
    
                            // Collect the needed data being submitted to the template.
                            $mustachedata = new stdClass();
                            $mustachedata->loggedin = $loggedin;
                            $mustachedata->src = $src;
                            $mustachedata->link = $link;
    
                            $newtext =  $renderer->render_player($mustachedata);
    
                            // Replace video tag.
                            $text = preg_replace('/<video.*<\/video>/', $newtext, $text, 1);
                        }
                    }
                }
            }
    
            // Return the same string except processed by the above.
            return $text;
        }
    
    
    }