| 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 |  |  |  * BigBlueButtonBN external API | 
            
                                                                                                            
                            
            
                                    
            
            
                | 19 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 |  |  |  * @package   mod_bigbluebuttonbn | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 |  |  |  * @category  external | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |  * @copyright 2018 onwards, Blindside Networks Inc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  | defined('MOODLE_INTERNAL') || die; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 |  |  | require_once("$CFG->libdir/externallib.php"); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 |  |  | /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |  * BigBlueButtonBN external functions | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |  * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |  * @package   mod_bigbluebuttonbn | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |  * @category  external | 
            
                                                                                                            
                            
            
                                    
            
            
                | 35 |  |  |  * @copyright 2018 onwards, Blindside Networks Inc | 
            
                                                                                                            
                            
            
                                    
            
            
                | 36 |  |  |  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later | 
            
                                                                                                            
                            
            
                                    
            
            
                | 37 |  |  |  */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 38 |  |  | class mod_bigbluebuttonbn_external extends external_api { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 39 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 40 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 41 |  |  |      * Returns description of method parameters | 
            
                                                                                                            
                            
            
                                    
            
            
                | 42 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 43 |  |  |      * @return external_function_parameters | 
            
                                                                                                            
                            
            
                                    
            
            
                | 44 |  |  |      * @since Moodle 3.0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 45 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 46 |  |  |     public static function view_bigbluebuttonbn_parameters() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |         return new external_function_parameters( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |             array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |                 'bigbluebuttonbnid' => new external_value(PARAM_INT, 'bigbluebuttonbn instance id') | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |             ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |      * Trigger the course module viewed event and update the module completion status. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 |  |  |      * @param int $bigbluebuttonbnid the bigbluebuttonbn instance id | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |      * @return array of warnings and status result | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 |  |  |      * @since Moodle 3.0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 60 |  |  |      * @throws moodle_exception | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 61 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 62 |  |  |     public static function view_bigbluebuttonbn($bigbluebuttonbnid) { | 
            
                                                                        
                            
            
                                    
            
            
                | 63 |  |  |         global $DB, $CFG; | 
            
                                                                        
                            
            
                                    
            
            
                | 64 |  |  |         require_once($CFG->dirroot . "/mod/bigbluebuttonbn/lib.php"); | 
            
                                                                        
                            
            
                                    
            
            
                | 65 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 66 |  |  |         $params = self::validate_parameters(self::view_bigbluebuttonbn_parameters(), | 
            
                                                                        
                            
            
                                    
            
            
                | 67 |  |  |                                             array( | 
            
                                                                        
                            
            
                                    
            
            
                | 68 |  |  |                                                 'bigbluebuttonbnid' => $bigbluebuttonbnid | 
            
                                                                        
                            
            
                                    
            
            
                | 69 |  |  |                                             )); | 
            
                                                                        
                            
            
                                    
            
            
                | 70 |  |  |         $warnings = array(); | 
            
                                                                        
                            
            
                                    
            
            
                | 71 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 72 |  |  |         // Request and permission validation. | 
            
                                                                        
                            
            
                                    
            
            
                | 73 |  |  |         $bigbluebuttonbn = $DB->get_record('bigbluebuttonbn', array('id' => $params['bigbluebuttonbnid']), '*', MUST_EXIST); | 
            
                                                                        
                            
            
                                    
            
            
                | 74 |  |  |         list($course, $cm) = get_course_and_cm_from_instance($bigbluebuttonbn, 'bigbluebuttonbn'); | 
            
                                                                        
                            
            
                                    
            
            
                | 75 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 76 |  |  |         $context = context_module::instance($cm->id); | 
            
                                                                        
                            
            
                                    
            
            
                | 77 |  |  |         self::validate_context($context); | 
            
                                                                        
                            
            
                                    
            
            
                | 78 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 79 |  |  |         require_capability('mod/bigbluebuttonbn:view', $context); | 
            
                                                                        
                            
            
                                    
            
            
                | 80 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 81 |  |  |         // Call the bigbluebuttonbn/lib API. | 
            
                                                                        
                            
            
                                    
            
            
                | 82 |  |  |         bigbluebuttonbn_view($bigbluebuttonbn, $course, $cm, $context); | 
            
                                                                        
                            
            
                                    
            
            
                | 83 |  |  |  | 
            
                                                                        
                            
            
                                    
            
            
                | 84 |  |  |         $result = array(); | 
            
                                                                        
                            
            
                                    
            
            
                | 85 |  |  |         $result['status'] = true; | 
            
                                                                        
                            
            
                                    
            
            
                | 86 |  |  |         $result['warnings'] = $warnings; | 
            
                                                                        
                            
            
                                    
            
            
                | 87 |  |  |         return $result; | 
            
                                                                        
                            
            
                                    
            
            
                | 88 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 89 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 90 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 91 |  |  |      * Returns description of method result value | 
            
                                                                                                            
                            
            
                                    
            
            
                | 92 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 93 |  |  |      * @return external_description | 
            
                                                                                                            
                            
            
                                    
            
            
                | 94 |  |  |      * @since Moodle 3.0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 95 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 96 |  |  |     public static function view_bigbluebuttonbn_returns() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 97 |  |  |         return new external_single_structure( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 98 |  |  |             array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 99 |  |  |                 'status' => new external_value(PARAM_BOOL, 'status: true if success'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 100 |  |  |                 'warnings' => new external_warnings() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 101 |  |  |             ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 102 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 103 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 104 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 105 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 106 |  |  |      * Describes the parameters for get_bigbluebuttonbns_by_courses. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 107 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 108 |  |  |      * @return external_function_parameters | 
            
                                                                                                            
                            
            
                                    
            
            
                | 109 |  |  |      * @since Moodle 3.3 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 110 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 111 |  |  |     public static function get_bigbluebuttonbns_by_courses_parameters() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 112 |  |  |         return new external_function_parameters ( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 113 |  |  |             array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 114 |  |  |                 'courseids' => new external_multiple_structure( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 115 |  |  |                     new external_value(PARAM_INT, 'Course id'), 'Array of course ids', VALUE_DEFAULT, array() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 116 |  |  |                 ), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 117 |  |  |             ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 118 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 119 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 120 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 121 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 122 |  |  |      * Returns a list of bigbluebuttonbns in a provided list of courses. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 123 |  |  |      * If no list is provided all bigbluebuttonbns that the user can view will be returned. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 124 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 125 |  |  |      * @param array $courseids course ids | 
            
                                                                                                            
                            
            
                                    
            
            
                | 126 |  |  |      * @return array of warnings and bigbluebuttonbns | 
            
                                                                                                            
                            
            
                                    
            
            
                | 127 |  |  |      * @since Moodle 3.3 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 128 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 129 |  |  |     public static function get_bigbluebuttonbns_by_courses($courseids = array()) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 130 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 131 |  |  |         $warnings = array(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 132 |  |  |         $returnedbigbluebuttonbns = array(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 133 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 134 |  |  |         $params = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 135 |  |  |             'courseids' => $courseids, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 136 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 137 |  |  |         $params = self::validate_parameters(self::get_bigbluebuttonbns_by_courses_parameters(), $params); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 138 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 139 |  |  |         $mycourses = array(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 140 |  |  |         if (empty($params['courseids'])) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 141 |  |  |             $mycourses = enrol_get_my_courses(); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 142 |  |  |             $params['courseids'] = array_keys($mycourses); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 143 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 144 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 145 |  |  |         // Ensure there are courseids to loop through. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 146 |  |  |         if (!empty($params['courseids'])) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 147 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 148 |  |  |             list($courses, $warnings) = external_util::validate_courses($params['courseids'], $mycourses); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 149 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 150 |  |  |             // Get the bigbluebuttonbns in this course, this function checks users visibility permissions. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 151 |  |  |             // We can avoid then additional validate_context calls. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 152 |  |  |             $bigbluebuttonbns = get_all_instances_in_courses("bigbluebuttonbn", $courses); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 153 |  |  |             foreach ($bigbluebuttonbns as $bigbluebuttonbn) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 154 |  |  |                 $context = context_module::instance($bigbluebuttonbn->coursemodule); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 155 |  |  |                 // Entry to return. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 156 |  |  |                 $bigbluebuttonbn->name = external_format_string($bigbluebuttonbn->name, $context->id); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 157 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 158 |  |  |                 list($bigbluebuttonbn->intro, $bigbluebuttonbn->introformat) = external_format_text($bigbluebuttonbn->intro, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 159 |  |  |                     $bigbluebuttonbn->introformat, $context->id, 'mod_bigbluebuttonbn', 'intro', null); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 160 |  |  |                 $bigbluebuttonbn->introfiles = external_util::get_area_files($context->id, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 161 |  |  |                     'mod_bigbluebuttonbn', 'intro', false, false); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 162 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 163 |  |  |                 $returnedbigbluebuttonbns[] = $bigbluebuttonbn; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 164 |  |  |             } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 165 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 166 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 167 |  |  |         $result = array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 168 |  |  |             'bigbluebuttonbns' => $returnedbigbluebuttonbns, | 
            
                                                                                                            
                            
            
                                    
            
            
                | 169 |  |  |             'warnings' => $warnings | 
            
                                                                                                            
                            
            
                                    
            
            
                | 170 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 171 |  |  |         return $result; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 172 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 173 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 174 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 175 |  |  |      * Describes the get_bigbluebuttonbns_by_courses return value. | 
            
                                                                                                            
                            
            
                                    
            
            
                | 176 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 177 |  |  |      * @return external_single_structure | 
            
                                                                                                            
                            
            
                                    
            
            
                | 178 |  |  |      * @since Moodle 3.3 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 179 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 180 |  |  |     public static function get_bigbluebuttonbns_by_courses_returns() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 181 |  |  |         return new external_single_structure( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 182 |  |  |             array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 183 |  |  |                 'bigbluebuttonbns' => new external_multiple_structure( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 184 |  |  |                     new external_single_structure( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 185 |  |  |                         array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 186 |  |  |                             'id' => new external_value(PARAM_INT, 'Module id'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 187 |  |  |                             'coursemodule' => new external_value(PARAM_INT, 'Course module id'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 188 |  |  |                             'course' => new external_value(PARAM_INT, 'Course id'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 189 |  |  |                             'name' => new external_value(PARAM_RAW, 'Name'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 190 |  |  |                             'intro' => new external_value(PARAM_RAW, 'Description'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 191 |  |  |                             'introformat' => new external_format_value('intro', 'Summary format'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 192 |  |  |                             'introfiles' => new external_files('Files in the introduction text'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 193 |  |  |                             'timemodified' => new external_value(PARAM_INT, 'Last time the instance was modified'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 194 |  |  |                             'section' => new external_value(PARAM_INT, 'Course section id'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 195 |  |  |                             'visible' => new external_value(PARAM_INT, 'Module visibility'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 196 |  |  |                             'groupmode' => new external_value(PARAM_INT, 'Group mode'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 197 |  |  |                             'groupingid' => new external_value(PARAM_INT, 'Grouping id'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 198 |  |  |                         ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 199 |  |  |                     ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 200 |  |  |                 ), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 201 |  |  |                 'warnings' => new external_warnings(), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 202 |  |  |             ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 203 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 204 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 205 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 206 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 207 |  |  |      * Returns description of method parameters | 
            
                                                                                                            
                            
            
                                    
            
            
                | 208 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 209 |  |  |      * @return external_function_parameters | 
            
                                                                                                            
                            
            
                                    
            
            
                | 210 |  |  |      * @since Moodle 3.0 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 211 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 212 |  |  |     public static function can_join_parameters() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 213 |  |  |         return new external_function_parameters( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 214 |  |  |             array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 215 |  |  |                 'cmid' => new external_value(PARAM_INT, 'course module id', VALUE_REQUIRED) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 216 |  |  |             ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 217 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 218 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 219 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 220 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 221 |  |  |      * This will check if current user can join the session from this module | 
            
                                                                                                            
                            
            
                                    
            
            
                | 222 |  |  |      * @param int $cmid | 
            
                                                                                                            
                            
            
                                    
            
            
                | 223 |  |  |      * @throws coding_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 224 |  |  |      * @throws dml_exception | 
            
                                                                                                            
                            
            
                                    
            
            
                | 225 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 226 |  |  |     public static function can_join($cmid) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 227 |  |  |         global $SESSION, $CFG; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 228 |  |  |         require_once($CFG->dirroot . "/mod/bigbluebuttonbn/locallib.php"); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 229 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 230 |  |  |         $params = self::validate_parameters(self::can_join_parameters(), | 
                            
                    |  |  |  | 
                                                                                        
                                                                                     | 
            
                                                                                                            
                            
            
                                    
            
            
                | 231 |  |  |             array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 232 |  |  |                 'cmid' => $cmid | 
            
                                                                                                            
                            
            
                                    
            
            
                | 233 |  |  |             )); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 234 |  |  |         $canjoin = \mod_bigbluebuttonbn\locallib\bigbluebutton::can_join_meeting($cmid); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 235 |  |  |         $canjoin['cmid'] = $cmid; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 236 |  |  |         return $canjoin; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 237 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 238 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 239 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 240 |  |  |      * Return value for can join function | 
            
                                                                                                            
                            
            
                                    
            
            
                | 241 |  |  |      * | 
            
                                                                                                            
                            
            
                                    
            
            
                | 242 |  |  |      * @return external_single_structure | 
            
                                                                                                            
                            
            
                                    
            
            
                | 243 |  |  |      * @since Moodle 3.3 | 
            
                                                                                                            
                            
            
                                    
            
            
                | 244 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 245 |  |  |     public static function can_join_returns() { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 246 |  |  |         return new external_single_structure( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 247 |  |  |             array( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 248 |  |  |                 'can_join' => new external_value(PARAM_BOOL, 'Can join session'), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 249 |  |  |                 'message' => new external_value(PARAM_RAW, 'Message if we cannot join', VALUE_OPTIONAL), | 
            
                                                                                                            
                            
            
                                    
            
            
                | 250 |  |  |                 'cmid' => new external_value(PARAM_INT, 'course module id', VALUE_REQUIRED) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 251 |  |  |             ) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 252 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 253 |  |  |     } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 254 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 255 |  |  |  | 
            
                        
This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVarassignment in line 1 and the$higherassignment in line 2 are dead. The first because$myVaris never used and the second because$higheris always overwritten for every possible time line.