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@ -1,180 +1,209 @@ |
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<?php |
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/** |
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* This file contains the helper libraries for the BigBlueButton conference plugin. |
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* It is based on code written by Dual Code Inc in GNU/GPLv2 |
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* Copyright (C) 2010 Dual Code Inc. (www.dualcode.com) |
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* Copyright (C) 2010 BeezNest Belgium SPRL (www.beeznest.com) - Yannick Warnier - y@beeznest.com |
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* This script initiates a videoconference session, calling the BigBlueButton API |
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* @package chamilo.plugin.bigbluebutton |
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*/ |
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/** |
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* Inserts an item into the plugin_bbb table |
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*/ |
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function bigbluebutton_insert_record($table,$object) { |
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//ignore the first param (used for compatibility with existing code) |
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$table = Database::get_main_table('plugin_bbb'); |
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$sql = "INSERT INTO $table (course_id, name, meeting_name, meeting_id, attendee_pw, moderator_pw, auto_login, new_window, welcome_msg)" . |
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"VALUES (" . |
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intval($object->course) .", " . |
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"'".Database::escape_string($object->name)."'," . |
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"'".Database::escape_string($object->meetingname)."'," . |
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"'".Database::escape_string($object->meetingid)."'," . |
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"'".Database::escape_string($object->attendeepw)."'," . |
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"'".Database::escape_string($object->moderatorpw)."'," . |
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"'".Database::escape_string($object->autologin)."'," . |
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"'".Database::escape_string($object->newwindow)."'," . |
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"'".Database::escape_string($object->welcomemsg)."'" . |
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")"; |
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Database::query($sql); |
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return Database::insert_id(); |
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} |
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/** |
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* Updates a bigbluebutton record |
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*/ |
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function bigbluebutton_update_record($table, $object) { |
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//ignore the first param (used for compatibility with existing code) $table = Database::get_main_table('plugin_bbb'); |
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$sql = "UPDATE $table (course_id, name, meeting_name, meeting_id, attendee_pw, moderator_pw, auto_login, new_window, welcome_msg)" . |
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" SET course_id = ".intval($object->course) .", " . |
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" name = '".Database::escape_string($object->name)."'," . |
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" meeting_name = '".Database::escape_string($object->meetingname)."'," . |
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" meeting_id = '".Database::escape_string($object->meetingid)."'," . |
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" attendee_pw = '".Database::escape_string($object->attendeepw)."'," . |
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" moderator_pw = '".Database::escape_string($object->moderatorpw)."'," . |
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" auto_login = '".Database::escape_string($object->autologin)."'," . |
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" new_window = '".Database::escape_string($object->newwindow)."'," . |
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" welcome_msg = '".Database::escape_string($object->welcomemsg)."'," . |
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" WHERE id = " .intval($object->id). |
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")"; |
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Database::query($sql); |
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return $oject->id; |
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} |
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/** |
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* Gets a bigbluebutton room record from an ID |
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*/ |
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function bigbluebutton_get_record($table,$field,$id) { |
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//ignore the first param (used for compatibility with existing code) |
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$table = Database::get_main_table('plugin_bbb'); |
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$sql = "SELECT * FROM $table WHERE id = ".intval($id); |
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$res = Database::query($sql); |
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if (Database::num_rows($res)>0) { |
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$row = Database::fetch_assoc($res); |
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$room = null; |
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$room->id = $id; |
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$room->course = $row['course_id']; |
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$room->name = $row['name']; |
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$room->meetingname = $row['meeting_name']; |
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$room->meetingid = $row['meeting_id']; |
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$room->attendeepw = $row['attendee_pw']; |
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$room->moderatorpw = $row['moderator_pw']; |
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$room->autologin = $row['auto_login']; |
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$room->newwindow = $row['new_window']; |
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$room->welcomemsg = $row['welcome_msg']; |
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return $room; |
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} else { |
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return null; |
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class bbb { |
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var $url; |
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var $salt; |
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var $api; |
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var $user_complete_name = null; |
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var $protocol = 'http://'; |
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var $debug = true; |
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var $logout_url = null; |
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function __construct() { |
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// initialize video server settings from global settings |
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$settings = api_get_settings('Extra','list',api_get_current_access_url_id()); |
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$bbb_settings = array(); |
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foreach ($settings as $setting) { |
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if (substr($setting['variable'],0,4)==='bbb_') { |
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$bbb_settings[$setting['variable']] = $setting['selected_value']; |
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} |
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} |
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/** |
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* Gets a bigbluebutton room record from an ID |
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*/ |
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function bigbluebutton_delete_records($table,$field,$id) { |
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//ignore the first param (used for compatibility with existing code) |
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$table = Database::get_main_table('plugin_bbb'); |
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$sql = "DELETE FROM $table WHERE id = ".intval($id); |
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} |
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/** |
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* Add an event |
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*/ |
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function bigbluebutton_add_event($event) { |
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// |
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} |
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/** |
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* Given an object containing all the necessary data, |
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* (defined by the form in mod.html) this function |
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* will create a new instance and return the id number |
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* of the new instance. |
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*/ |
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function bigbluebutton_add_instance($bigbluebutton) { |
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$bigbluebutton->timemodified = time(); |
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if ($returnid = bigbluebutton_insert_record('bigbluebutton', $bigbluebutton)) { |
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$event = NULL; |
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$event->courseid = $bigbluebutton->course; |
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$event->name = $bigbluebutton->name; |
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$event->meetingname = $bigbluebutton->meetingname; |
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$event->meetingid = $bigbluebutton->meetingid; |
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$event->attendeepw = $bigbluebutton->attendeepw; |
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$event->moderatorpw = $bigbluebutton->moderatorpw; |
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$event->autologin = $bigbluebutton->autologin; |
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$event->newwindow = $bigbluebutton->newwindow; |
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$event->welcomemsg = $bigbluebutton->welcomemsg; |
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bigbluebutton_add_event($event); |
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} |
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return $returnid; |
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} |
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} |
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$bbb_plugin = $bbb_settings['bbb_plugin'] === 'true'; |
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$bbb_host = $bbb_settings['bbb_plugin_host']; |
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$bbb_salt = $bbb_settings['bbb_plugin_salt']; |
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$course_code = api_get_course_id(); |
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/** |
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* Given an object containing all the necessary data, |
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* (defined by the form in mod.html) this function |
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* will update an existing instance with new data. |
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*/ |
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function bigbluebutton_update_instance($bigbluebutton) { |
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$bigbluebutton->timemodified = time(); |
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$bigbluebutton->id = $bigbluebutton->instance; |
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if ($returnid = bigbluebutton_update_record('bigbluebutton', $bigbluebutton)) { |
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/* |
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$event = NULL; |
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if ($event->id = bigbluebutton_get_field('event', 'id', 'modulename', 'bigbluebutton', 'instance', $bigbluebutton->id)) { |
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$event->courseid = $bigbluebutton->course; |
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$event->name = $bigbluebutton->name; |
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$event->meetingname = $bigbluebutton->meetingname; |
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$event->meetingid = $bigbluebutton->meetingid; |
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$event->attendeepw = $bigbluebutton->attendeepw; |
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$event->moderatorpw = $bigbluebutton->moderatorpw; |
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$event->autologin = $bigbluebutton->autologin; |
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$event->newwindow = $bigbluebutton->newwindow; |
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$event->welcomemsg = $bigbluebutton->welcomemsg; |
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bigbluebutton_update_event($event); |
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}*/ |
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} |
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return $returnid; |
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} |
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$this->logout_url = api_get_path(WEB_COURSE_PATH).$course_code; |
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if ($bbb_plugin) { |
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$user_info = api_get_user_info(); |
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$this->user_complete_name = $user_info['complete_name']; |
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$this->salt = $bbb_salt; |
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$this->url = $bbb_host.'/bigbluebutton/'; |
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$this->table = Database::get_main_table('plugin_bbb_meeting'); |
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return true; |
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} |
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return false; |
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} |
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function create_meeting($params) { |
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$params['c_id'] = api_get_course_int_id(); |
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$course_code = api_get_course_id(); |
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$attende_password = $params['attendee_pw'] = isset($params['moderator_pw']) ? $params['moderator_pw'] : api_get_course_id(); |
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$moderator_password = $params['moderator_pw'] = isset($params['moderator_pw']) ? $params['moderator_pw'] : api_get_course_id().'mod'; |
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/** |
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* Given an ID of an instance of this module, |
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* this function will permanently delete the instance |
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* and any data that depends on it. |
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$params['record'] = api_get_course_setting('big_blue_button_record_and_store', $course_code) == 1 ? true : false; |
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$max = api_get_course_setting('big_blue_button_max_students_allowed', $course_code); |
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$max = isset($max) ? $max : -1; |
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$params['status'] = 1; |
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if ($this->debug) error_log("enter create_meeting ".print_r($params, 1)); |
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$params['created_at'] = api_get_utc_datetime(); |
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$id = Database::insert($this->table, $params); |
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if ($id) { |
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if ($this->debug) error_log("create_meeting $id "); |
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$meeting_name = isset($params['meeting_name']) ? $params['meeting_name'] : api_get_course_id(); |
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$welcome_msg = isset($params['welcome_msg']) ? $params['welcome_msg'] : null; |
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$record = isset($params['record']) && $params['record'] ? 'true' : 'false'; |
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$duration = isset($params['duration']) ? intval($params['duration']) : 0; |
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// ?? |
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$voiceBridge = 0; |
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$metadata = array('maxParticipants' => $max); |
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return $this->protocol.BigBlueButtonBN::createMeetingAndGetJoinURL($this->user_complete_name, $meeting_name, $id, $welcome_msg, $moderator_password, $attende_password, |
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$this->salt, $this->url, $this->logout_url, $record, $duration, $voiceBridge, $metadata); |
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//$id = Database::update($this->table, array('created_at' => '')); |
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} |
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} |
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function is_meeting_exist($meeting_name) { |
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$course_id = api_get_course_int_id(); |
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$meeting_data = Database::select('*', $this->table, array('where' => array('c_id = ? AND meeting_name = ? AND status = 1 ' => array($course_id, $meeting_name))), 'first'); |
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if ($this->debug) error_log("is_meeting_exist ".print_r($meeting_data,1)); |
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if (empty($meeting_data)) { |
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return false; |
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} else { |
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return true; |
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} |
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} |
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/** |
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* @todo implement moderator pass |
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*/ |
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function bigbluebutton_delete_instance($id) { |
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if (! $bigbluebutton = bigbluebutton_get_record('bigbluebutton', 'id', $id)) { |
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function join_meeting($meeting_name) { |
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$pass = $this->get_user_metting_password(); |
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$meeting_data = Database::select('*', $this->table, array('where' => array('meeting_name = ? AND status = 1 ' => $meeting_name)), 'first'); |
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if (empty($meeting_data)) { |
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if ($this->debug) error_log("meeting does not exist: $meeting_name "); |
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return false; |
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} |
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$meeting_is_running = BigBlueButtonBN::isMeetingRunning($meeting_data['id'], $this->url, $this->salt); |
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$url = false; |
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if ($this->debug) error_log("meeting is running".$meeting_is_running); |
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if (isset($meeting_is_running)) { |
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$url = $this->protocol.BigBlueButtonBN::joinURL($meeting_data['id'], $this->user_complete_name, $pass, $this->salt, $this->url); |
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} |
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if ($this->debug) error_log("url :".$url); |
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return $url; |
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} |
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function get_course_meetings() { |
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$pass = $this->get_user_metting_password(); |
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$meeting_list = Database::select('*', $this->table, array('where' => array('c_id = ? ' => api_get_course_int_id()))); |
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$new_meeting_list = array(); |
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foreach ($meeting_list as $meeting) { |
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$item_meeting = $meeting; |
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$item_meeting['info'] = BigBlueButtonBN::getMeetingInfoArray($meeting['id'], $pass, $this->url, $this->salt); |
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if ($meeting['info']['returncode'] == 'FAILED') { |
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$result = true; |
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} else { |
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$item_meeting['end_url'] = api_get_self().'?action=end&id='.$meeting['id']; |
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} |
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$record_array = array(); |
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# Delete any dependent records here # |
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if ($meeting['record'] == 1) { |
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$records = BigBlueButtonBN::getRecordingsArray($meeting['id'], $this->url, $this->salt); |
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if (! bigbluebutton_delete_records('bigbluebutton', 'id', $bigbluebutton->id)) { |
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$result = false; |
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if (!empty($records)) { |
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foreach ($records as $record) { |
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//var_dump($record); |
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if (is_array($record) && isset($record['recordID']) && isset($record['playbacks'])) { |
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foreach ($record['playbacks'] as $item) { |
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$url = Display::url(get_lang('ViewRecord'), $item['url'], array('target' => '_blank')); |
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//$url .= api_get_self().'?action=publish&id='.$record['recordID']; |
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$record_array[] = $url; |
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} |
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/* |
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$pagetypes = page_import_types('mod/bigbluebutton/'); |
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foreach($pagetypes as $pagetype) { |
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if(!delete_records('block_instance', 'pageid', $bigbluebutton->id, 'pagetype', $pagetype)) { |
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$result = false; |
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} |
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} |
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*/ |
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/* |
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if (! bigbluebutton_delete_records('event', 'modulename', 'bigbluebutton', 'instance', $bigbluebutton->id)) { |
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$result = false; |
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} |
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*/ |
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return $result; |
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$item_meeting['show_links'] = implode('<br />', $record_array); |
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} |
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$item_meeting['created_at'] = api_get_local_time($item_meeting['created_at']); |
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//created_at |
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$item_meeting['publish_url'] = api_get_self().'?action=publish&id='.$meeting['id']; |
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$item_meeting['unpublish_url'] = api_get_self().'?action=unpublish&id='.$meeting['id']; |
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if ($meeting['status'] == 1) { |
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$item_meeting['go_url'] = $this->protocol.BigBlueButtonBN::joinURL($meeting['id'], $this->user_complete_name, $pass, $this->salt, $this->url); |
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} |
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$new_meeting_list[] = $item_meeting; |
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} |
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return $new_meeting_list; |
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} |
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function publish_meeting($id) { |
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return BigBlueButtonBN::setPublishRecordings($id, 'true', $this->url, $this->salt); |
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} |
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function unpublish_meeting($id) { |
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return BigBlueButtonBN::setPublishRecordings($id, 'false', $this->url, $this->salt); |
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} |
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function end_meeting($id) { |
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$pass = $this->get_user_metting_password(); |
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BigBlueButtonBN::endMeeting($id, $pass, $this->url, $this->salt); |
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Database::update($this->table, array('status' => 0), array('id = ? ' => $id)); |
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} |
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function get_user_metting_password() { |
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$teacher = api_is_course_admin() || api_is_coach() || api_is_platform_admin(); |
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if ($teacher) { |
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return api_get_course_id().'mod'; |
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} else { |
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return api_get_course_id(); |
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} |
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} |
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/** |
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* Get users online in the current course room |
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*/ |
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function get_users_online_in_current_room() { |
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$course_id = api_get_course_int_id(); |
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$meeting_data = Database::select('*', $this->table, array('where' => array('c_id = ? AND status = 1 ' => $course_id)), 'first'); |
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if (empty($meeting_data)) { |
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return 0; |
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} |
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$pass = $this->get_user_metting_password(); |
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//$meeting_is_running = BigBlueButtonBN::isMeetingRunning($meeting_data['id'], $this->url, $this->salt); |
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$info = BigBlueButtonBN::getMeetingInfoArray($meeting_data['id'], $pass, $this->url, $this->salt); |
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if (!empty($info) && isset($info['participantCount'])) { |
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return $info['participantCount']; |
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} |
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return 0; |
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} |
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} |
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/** |
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* Create string where we check if the meeting is running |
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*/ |
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@ -206,19 +235,34 @@ function wc_isMeetingRunning($myIP,$mySecuritySalt,$myMeetingID) { |
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/** |
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* Create meeting if it's not already running |
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*/ |
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function wc_createMeeting($myIP,$mySecuritySalt,$myMeetingName,$myMeetingID,$myAttendeePW,$myModeratorPW,$myWelcomeMsg,$myLogoutURL) { |
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function wc_createMeeting($myIP, $mySecuritySalt, $myMeetingName, $myMeetingID, $myAttendeePW, $myModeratorPW, $myWelcomeMsg, $myLogoutURL, $record = false, $duration = null) { |
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$createAPI = "/bigbluebutton/api/create?"; |
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$myVoiceBridge = rand(70000,79999); |
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$queryStr = "name=".urlencode($myMeetingName)."&meetingID=".urlencode($myMeetingID)."&attendeePW=".urlencode($myAttendeePW)."&moderatorPW=".urlencode($myModeratorPW)."&voiceBridge=".$myVoiceBridge."&welcome=".urlencode($myWelcomeMsg)."&logoutURL=".urlencode($myLogoutURL); |
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if (isset($record)) { |
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$record = 'true'; |
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} else { |
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$record = 'false'; |
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} |
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$duration_param = ''; |
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|
if (!empty($duration)) { |
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|
$duration_param = '&duration='.intval($duration); |
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} |
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$queryStr = "name=".urlencode($myMeetingName)."&meetingID=".urlencode($myMeetingID)."&attendeePW=".urlencode($myAttendeePW)."&moderatorPW=".urlencode($myModeratorPW). |
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"&voiceBridge=".$myVoiceBridge."&welcome=".urlencode($myWelcomeMsg)."&logoutURL=".urlencode($myLogoutURL)."&record=".$record.$duration_param; |
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$checksum = sha1('create'.$queryStr.$mySecuritySalt); |
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$secQueryURL = "http://".$myIP.$createAPI.$queryStr."&checksum=".$checksum; |
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$myResponse = @file_get_contents($secQueryURL); |
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|
if ($myResponse === false) { return false; } |
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|
if ($myResponse === false) { |
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|
return false; |
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|
} |
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|
$doc= new DOMDocument(); |
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|
$doc->loadXML($myResponse); |
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|
$returnCodeNode = $doc->getElementsByTagName("returncode"); |
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|
$returnCode = $returnCodeNode->item(0)->nodeValue; |
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|
if ($returnCode=="SUCCESS") { |
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|
return $returnCode; |
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|
} else { |
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|
@ -368,3 +412,118 @@ function wc_getRunningMeetings($myIP,$mySecuritySalt) { |
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|
} |
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|
return $meetings; |
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|
} |
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|
function wc_getRecordingsURL($meetingID, $URL, $SALT) { |
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|
|
$base_url_record = $URL."api/getRecordings?"; |
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|
|
$params = "meetingID=".urlencode($meetingID); |
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|
|
return ($base_url_record.$params."&checksum=".sha1("getRecordings".$params.$SALT) ); |
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|
} |
|
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|
|
/** |
|
|
|
|
*This method calls getMeetings on the bigbluebuttonbn server, then calls getMeetingInfo for each meeting and concatenates the result. |
|
|
|
|
* |
|
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|
|
*@param URL -- the url of the bigbluebuttonbn server |
|
|
|
|
*@param SALT -- the security salt of the bigbluebuttonbn server |
|
|
|
|
* |
|
|
|
|
*@return |
|
|
|
|
* - Null if the server is unreachable |
|
|
|
|
* - If FAILED then returns an array containing a returncode, messageKey, message. |
|
|
|
|
* - If SUCCESS then returns an array of all the meetings. Each element in the array is an array containing a meetingID, |
|
|
|
|
moderatorPW, attendeePW, hasBeenForciblyEnded, running. |
|
|
|
|
*/ |
|
|
|
|
function wc_getRecordingsArray($meetingID, $URL, $SALT ) { |
|
|
|
|
$xml = _wrap_simplexml_load_file(wc_getRecordingsURL( $meetingID, $URL, $SALT)); |
|
|
|
|
|
|
|
|
|
if( $xml && $xml->returncode == 'SUCCESS' && $xml->messageKey ) { |
|
|
|
|
////The meetings were returned |
|
|
|
|
return array('returncode' => (string) $xml->returncode, 'message' => (string) $xml->message, 'messageKey' => (string) $xml->messageKey); |
|
|
|
|
} else if($xml && $xml->returncode == 'SUCCESS') { //If there were meetings already created |
|
|
|
|
$recordings = array(); |
|
|
|
|
foreach ($xml->recordings->recording as $recording) { |
|
|
|
|
$recordings[(string) $recording->recordID] = array( 'recordID' => (string) $recording->recordID, 'meetingID' => (string) $recording->meetingID, 'meetingName' => (string) $recording->name, 'published' => (string) $recording->published, 'startTime' => (string) $recording->startTime, 'endTime' => (string) $recording->endTime ); |
|
|
|
|
$recordings[(string) $recording->recordID]['playbacks'] = array(); |
|
|
|
|
foreach ( $recording->playback->format as $format ){ |
|
|
|
|
$recordings[(string) $recording->recordID]['playbacks'][(string) $format->type] = array( 'type' => (string) $format->type, 'url' => (string) $format->url ); |
|
|
|
|
} |
|
|
|
|
// THIS IS FOR TESTING MULTIPLE FORMATS, DO REMOVE IT FOR FINAL RELEASE |
|
|
|
|
//$recordings[(string) $recording->recordID]['playbacks']['desktop'] = array( 'type' => 'desktop', 'url' => (string) $recording->playback->format->url ); |
|
|
|
|
|
|
|
|
|
//Add the metadata to the recordings array |
|
|
|
|
$metadata = get_object_vars($recording->metadata); |
|
|
|
|
while ($data = current($metadata)) { |
|
|
|
|
$recordings[(string) $recording->recordID]['meta_'.key($metadata)] = $data; |
|
|
|
|
next($metadata); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
ksort($recordings); |
|
|
|
|
return $recordings; |
|
|
|
|
} else if( $xml ) { //If the xml packet returned failure it displays the message to the user |
|
|
|
|
return array('returncode' => (string) $xml->returncode, 'message' => (string) $xml->message, 'messageKey' => (string) $xml->messageKey); |
|
|
|
|
} else { //If the server is unreachable, then prompts the user of the necessary action |
|
|
|
|
return NULL; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
function _wrap_simplexml_load_file($url){ |
|
|
|
|
if (extension_loaded('curl')) { |
|
|
|
|
$ch = curl_init() or die ( curl_error() ); |
|
|
|
|
$timeout = 10; |
|
|
|
|
curl_setopt( $ch, CURLOPT_SSL_VERIFYPEER, false); |
|
|
|
|
curl_setopt( $ch, CURLOPT_URL, $url ); |
|
|
|
|
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 ); |
|
|
|
|
curl_setopt( $ch, CURLOPT_CONNECTTIMEOUT, $timeout); |
|
|
|
|
$data = curl_exec( $ch ); |
|
|
|
|
curl_close( $ch ); |
|
|
|
|
|
|
|
|
|
if($data) |
|
|
|
|
return (new SimpleXMLElement($data,LIBXML_NOCDATA)); |
|
|
|
|
else |
|
|
|
|
return false; |
|
|
|
|
} |
|
|
|
|
return (simplexml_load_file($url,'SimpleXMLElement', LIBXML_NOCDATA)); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
function getMeetingsURL($URL, $SALT) { |
|
|
|
|
$base_url = $URL."api/getMeetings?"; |
|
|
|
|
$params = ''; |
|
|
|
|
return ( $base_url.$params.'&checksum='.sha1("getMeetings".$params.$SALT)); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/** |
|
|
|
|
*This method calls getMeetings on the bigbluebuttonbn server, then calls getMeetingInfo for each meeting and concatenates the result. |
|
|
|
|
* |
|
|
|
|
*@param URL -- the url of the bigbluebuttonbn server |
|
|
|
|
*@param SALT -- the security salt of the bigbluebuttonbn server |
|
|
|
|
* |
|
|
|
|
*@return |
|
|
|
|
* - Null if the server is unreachable |
|
|
|
|
* - If FAILED then returns an array containing a returncode, messageKey, message. |
|
|
|
|
* - If SUCCESS then returns an array of all the meetings. Each element in the array is an array containing a meetingID, |
|
|
|
|
moderatorPW, attendeePW, hasBeenForciblyEnded, running. |
|
|
|
|
*/ |
|
|
|
|
function getMeetingsArray( $URL, $SALT ) { |
|
|
|
|
|
|
|
|
|
if( $xml && $xml->returncode == 'SUCCESS' && $xml->messageKey ) {//The meetings were returned |
|
|
|
|
return array('returncode' => $xml->returncode, 'message' => $xml->message, 'messageKey' => $xml->messageKey); |
|
|
|
|
} |
|
|
|
|
else if($xml && $xml->returncode == 'SUCCESS'){ //If there were meetings already created |
|
|
|
|
|
|
|
|
|
foreach ($xml->meetings->meeting as $meeting) |
|
|
|
|
{ |
|
|
|
|
$meetings[] = array( 'meetingID' => $meeting->meetingID, 'moderatorPW' => $meeting->moderatorPW, 'attendeePW' => $meeting->attendeePW, 'hasBeenForciblyEnded' => $meeting->hasBeenForciblyEnded, 'running' => $meeting->running ); |
|
|
|
|
} |
|
|
|
|
return $meetings; |
|
|
|
|
|
|
|
|
|
} |
|
|
|
|
else if( $xml ) { //If the xml packet returned failure it displays the message to the user |
|
|
|
|
return array('returncode' => $xml->returncode, 'message' => $xml->message, 'messageKey' => $xml->messageKey); |
|
|
|
|
} |
|
|
|
|
else { //If the server is unreachable, then prompts the user of the necessary action |
|
|
|
|
return null; |
|
|
|
|
} |
|
|
|
|
} |
Julio Montoya
14 years ago