| 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 |  |  |  * The mod_bigbluebuttonbn locallib/bigbluebutton. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |  * @package   mod_bigbluebuttonbn | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |  * @copyright 2010 onwards, Blindside Networks Inc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |  * @author    Jesus Federico  (jesus [at] blindsidenetworks [dt] com) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  | namespace mod_bigbluebuttonbn\locallib; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  | use context_module; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  | defined('MOODLE_INTERNAL') || die(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  | global $CFG; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  | require_once($CFG->dirroot . '/mod/bigbluebuttonbn/locallib.php'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |  * Wrapper for executing http requests on a BigBlueButton server. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |  * @copyright 2010 onwards, Blindside Networks Inc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  |  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  | class bigbluebutton { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |      * Returns the right URL for the action specified. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |      * @param string $action | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  |      * @param array  $data | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |      * @param array  $metadata | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |     public static function action_url($action = '', $data = array(), $metadata = array()) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |         $baseurl = self::sanitized_url() . $action . '?'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |         $metadata = array_combine( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |             array_map( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |                 function($k) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |                     return 'meta_' . $k; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |                 } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |                 , array_keys($metadata) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |             ), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |             $metadata | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 |  |  |         $params = http_build_query($data + $metadata, '', '&'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 |  |  |         return $baseurl . $params . '&checksum=' . sha1($action . $params . self::sanitized_secret()); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 |  |  |      * Makes sure the url used doesn't is in the format required. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 67 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 68 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 69 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 70 |  |  |     public static function sanitized_url() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 71 |  |  |         $serverurl = trim(config::get('server_url')); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 72 |  |  |         if (substr($serverurl, -1) == '/') { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 73 |  |  |             $serverurl = rtrim($serverurl, '/'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 74 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 75 |  |  |         if (substr($serverurl, -4) == '/api') { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 76 |  |  |             $serverurl = rtrim($serverurl, '/api'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 77 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 78 |  |  |         return $serverurl . '/api/'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 79 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 80 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 81 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 82 |  |  |      * Makes sure the shared_secret used doesn't have trailing white characters. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 83 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 84 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 85 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 86 |  |  |     public static function sanitized_secret() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 87 |  |  |         return trim(config::get('shared_secret')); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 88 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |      * Returns the BigBlueButton server root URL. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |      * @return string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |     public static function root() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |         $pserverurl = parse_url(trim(config::get('server_url'))); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |         $pserverurlport = ""; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  |         if (isset($pserverurl['port'])) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |             $pserverurlport = ":" . $pserverurl['port']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |         return $pserverurl['scheme'] . "://" . $pserverurl['host'] . $pserverurlport . "/"; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  |      * Get BBB session information from viewinstance | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  |      * @param object $viewinstance | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  |      * @return mixed | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  |      * @throws \coding_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  |      * @throws \dml_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  |      * @throws \moodle_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |      * @throws \require_login_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |      * @throws \required_capability_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  |     public static function build_bbb_session_fromviewinstance($viewinstance) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  |         $cm = $viewinstance['cm']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |         $course = $viewinstance['course']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  |         $bigbluebuttonbn = $viewinstance['bigbluebuttonbn']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  |         return self::build_bbb_session($cm, $course, $bigbluebuttonbn); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |      * Get BBB session from parameters | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  |      * @param \course_modinfo $cm | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  |      * @param object $course | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |      * @param object $bigbluebuttonbn | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  |      * @return mixed | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |      * @throws \coding_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |      * @throws \dml_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  |      * @throws \moodle_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  |      * @throws \require_login_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  |      * @throws \required_capability_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 |  |  |     public static function build_bbb_session($cm, $course, $bigbluebuttonbn) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 136 |  |  |         global $CFG; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  |         $context = context_module::instance($cm->id); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  |         require_login($course->id, false, $cm, true, true); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  |         require_capability('mod/bigbluebuttonbn:join', $context); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  |         // Add view event. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  |         bigbluebuttonbn_event_log(\mod_bigbluebuttonbn\event\events::$events['view'], $bigbluebuttonbn); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 |  |  |         // Create array bbbsession with configuration for BBB server. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  |         $bbbsession['course'] = $course; | 
                            
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                | 146 |  |  |         $bbbsession['coursename'] = $course->fullname; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 |  |  |         $bbbsession['cm'] = $cm; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  |         $bbbsession['bigbluebuttonbn'] = $bigbluebuttonbn; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  |         self::view_bbbsession_set($context, $bbbsession); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  |         $serverversion = bigbluebuttonbn_get_server_version(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  |         $bbbsession['serverversion'] = (string) $serverversion; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  |         // Operation URLs. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  |         $bbbsession['bigbluebuttonbnURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/view.php?id=' . $cm->id; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  |         $bbbsession['logoutURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/bbb_view.php?action=logout&id=' . $cm->id . | 
            
                                                                                                            
                            
            
                                    
            
            
                | 157 |  |  |             '&bn=' . $bbbsession['bigbluebuttonbn']->id; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 |  |  |         $bbbsession['recordingReadyURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/bbb_broker.php?action=recording_' . | 
            
                                                                                                            
                            
            
                                    
            
            
                | 159 |  |  |             'ready&bigbluebuttonbn=' . $bbbsession['bigbluebuttonbn']->id; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 |  |  |         $bbbsession['meetingEventsURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/bbb_broker.php?action=meeting' . | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 |  |  |             '_events&bigbluebuttonbn=' . $bbbsession['bigbluebuttonbn']->id; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  |         $bbbsession['joinURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/bbb_view.php?action=join&id=' . $cm->id . | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  |             '&bn=' . $bbbsession['bigbluebuttonbn']->id; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  |         return $bbbsession; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 168 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 |  |  |      * Build standard array with configurations required for BBB server. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 |  |  |      * @param \context $context | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 |  |  |      * @param array $session | 
            
                                                                                                            
                            
            
                                    
            
            
                | 173 |  |  |      * @throws \coding_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 |  |  |      * @throws \dml_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 175 |  |  |      */ | 
            
                                                                                                            
                            
            
                                                                    
                                                                                                        
            
            
                | 176 |  | View Code Duplication |     public static function view_bbbsession_set($context, &$session) { | 
                            
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                | 177 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  |         global $CFG, $USER; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  |         $session['username'] = fullname($USER); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  |         $session['userID'] = $USER->id; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  |         $session['administrator'] = is_siteadmin($session['userID']); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  |         $participantlist = bigbluebuttonbn_get_participant_list($session['bigbluebuttonbn'], $context); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  |         $session['moderator'] = bigbluebuttonbn_is_moderator($context, $participantlist); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  |         $session['managerecordings'] = ($session['administrator'] | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 |  |  |             || has_capability('mod/bigbluebuttonbn:managerecordings', $context)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  |         $session['importrecordings'] = ($session['managerecordings']); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  |         $session['modPW'] = $session['bigbluebuttonbn']->moderatorpass; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  |         $session['viewerPW'] = $session['bigbluebuttonbn']->viewerpass; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  |         $session['meetingid'] = $session['bigbluebuttonbn']->meetingid.'-'.$session['course']->id.'-'. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  |             $session['bigbluebuttonbn']->id; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  |         $session['meetingname'] = $session['bigbluebuttonbn']->name; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  |         $session['meetingdescription'] = $session['bigbluebuttonbn']->intro; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  |         $session['userlimit'] = intval((int) config::get('userlimit_default')); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  |         if ((boolean) config::get('userlimit_editable')) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  |             $session['userlimit'] = intval($session['bigbluebuttonbn']->userlimit); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  |         $session['voicebridge'] = $session['bigbluebuttonbn']->voicebridge; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  |         if ($session['bigbluebuttonbn']->voicebridge > 0) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  |             $session['voicebridge'] = 70000 + $session['bigbluebuttonbn']->voicebridge; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  |         $session['wait'] = $session['bigbluebuttonbn']->wait; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  |         $session['record'] = $session['bigbluebuttonbn']->record; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  |         $session['recordallfromstart'] = $CFG->bigbluebuttonbn_recording_all_from_start_default; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  |         if ($CFG->bigbluebuttonbn_recording_all_from_start_editable) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  |             $session['recordallfromstart'] = $session['bigbluebuttonbn']->recordallfromstart; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  |         $session['recordhidebutton'] = $CFG->bigbluebuttonbn_recording_hide_button_default; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 |  |  |         if ($CFG->bigbluebuttonbn_recording_hide_button_editable) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 212 |  |  |             $session['recordhidebutton'] = $session['bigbluebuttonbn']->recordhidebutton; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 213 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 214 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 215 |  |  |         $session['welcome'] = $session['bigbluebuttonbn']->welcome; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 216 |  |  |         if (!isset($session['welcome']) || $session['welcome'] == '') { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 217 |  |  |             $session['welcome'] = get_string('mod_form_field_welcome_default', 'bigbluebuttonbn'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 218 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 219 |  |  |         if ($session['bigbluebuttonbn']->record) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 220 |  |  |             // Check if is enable record all from start. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 221 |  |  |             if ($session['recordallfromstart']) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 222 |  |  |                 $session['welcome'] .= '<br><br>'.get_string('bbbrecordallfromstartwarning', | 
            
                                                                                                            
                            
            
                                    
            
            
                | 223 |  |  |                         'bigbluebuttonbn'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 224 |  |  |             } else { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 225 |  |  |                 $session['welcome'] .= '<br><br>'.get_string('bbbrecordwarning', 'bigbluebuttonbn'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 226 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 227 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 228 |  |  |         $session['openingtime'] = $session['bigbluebuttonbn']->openingtime; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 229 |  |  |         $session['closingtime'] = $session['bigbluebuttonbn']->closingtime; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 230 |  |  |         $session['muteonstart'] = $session['bigbluebuttonbn']->muteonstart; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 231 |  |  |         $session['context'] = $context; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 232 |  |  |         $session['origin'] = 'Moodle'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 233 |  |  |         $session['originVersion'] = $CFG->release; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 234 |  |  |         $parsedurl = parse_url($CFG->wwwroot); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 235 |  |  |         $session['originServerName'] = $parsedurl['host']; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 236 |  |  |         $session['originServerUrl'] = $CFG->wwwroot; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 237 |  |  |         $session['originServerCommonName'] = ''; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 238 |  |  |         $session['originTag'] = 'moodle-mod_bigbluebuttonbn ('.get_config('mod_bigbluebuttonbn', 'version').')'; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 239 |  |  |         $session['bnserver'] = bigbluebuttonbn_is_bn_server(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 240 |  |  |         $session['clienttype'] = config::get('clienttype_default'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 241 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 242 |  |  |         if (config::get('clienttype_editable')) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 243 |  |  |             $session['clienttype'] = $session['bigbluebuttonbn']->clienttype; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 244 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 245 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 246 |  |  |         if (!config::clienttype_enabled()) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 247 |  |  |             $session['clienttype'] = BIGBLUEBUTTON_CLIENTTYPE_FLASH; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 248 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 249 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 250 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 251 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 252 |  |  |      * Can join meeting. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 253 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 254 |  |  |      * @param int $cmid | 
            
                                                                                                            
                            
            
                                    
            
            
                | 255 |  |  |      * @return array|bool[] | 
            
                                                                                                            
                            
            
                                    
            
            
                | 256 |  |  |      * @throws \coding_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 257 |  |  |      * @throws \dml_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 258 |  |  |      * @throws \moodle_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 259 |  |  |      * @throws \require_login_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 260 |  |  |      * @throws \required_capability_exception | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 261 |  |  |      */ | 
            
                                                        
            
                                    
            
            
                | 262 |  |  |     public static function can_join_meeting($cmid) { | 
            
                                                        
            
                                    
            
            
                | 263 |  |  |         global $CFG; | 
            
                                                        
            
                                    
            
            
                | 264 |  |  |         $canjoin = array('can_join' => false, 'message' => ''); | 
            
                                                        
            
                                    
            
            
                | 265 |  |  |  | 
            
                                                        
            
                                    
            
            
                | 266 |  |  |         $viewinstance = bigbluebuttonbn_view_validator($cmid, null); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                        
            
                                    
            
            
                | 267 |  |  |         if ($viewinstance) { | 
            
                                                        
            
                                    
            
            
                | 268 |  |  |             $bbbsession = self::build_bbb_session_fromviewinstance($viewinstance); | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                        
            
                                    
            
            
                | 269 |  |  |             if ($bbbsession) { | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                        
            
                                    
            
            
                | 270 |  |  |                 require_once($CFG->dirroot . "/mod/bigbluebuttonbn/brokerlib.php"); | 
            
                                                        
            
                                    
            
            
                | 271 |  |  |                 $info = bigbluebuttonbn_get_meeting_info($bbbsession['meetingid'], false); | 
            
                                                        
            
                                    
            
            
                | 272 |  |  |                 $running = false; | 
            
                                                        
            
                                    
            
            
                | 273 |  |  |                 if ($info['returncode'] == 'SUCCESS') { | 
            
                                                        
            
                                    
            
            
                | 274 |  |  |                     $running = ($info['running'] === 'true'); | 
            
                                                        
            
                                    
            
            
                | 275 |  |  |                 } | 
            
                                                        
            
                                    
            
            
                | 276 |  |  |                 $participantcount = 0; | 
            
                                                        
            
                                    
            
            
                | 277 |  |  |                 if (isset($info['participantCount'])) { | 
            
                                                        
            
                                    
            
            
                | 278 |  |  |                     $participantcount = $info['participantCount']; | 
            
                                                        
            
                                    
            
            
                | 279 |  |  |                 } | 
            
                                                        
            
                                    
            
            
                | 280 |  |  |                 $canjoin = bigbluebuttonbn_broker_meeting_info_can_join($bbbsession, $running, $participantcount); | 
            
                                                        
            
                                    
            
            
                | 281 |  |  |             } | 
            
                                                        
            
                                    
            
            
                | 282 |  |  |         } | 
            
                                                        
            
                                    
            
            
                | 283 |  |  |         return $canjoin; | 
            
                                                        
            
                                    
            
            
                | 284 |  |  |     } | 
            
                                                        
            
                                    
            
            
                | 285 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 286 |  |  |  | 
            
                        
Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.