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<?php |
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// This file is part of Moodle - http://moodle.org/ |
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// |
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// Moodle is free software: you can redistribute it and/or modify |
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// it under the terms of the GNU General Public License as published by |
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// the Free Software Foundation, either version 3 of the License, or |
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// (at your option) any later version. |
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// |
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// Moodle is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// |
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// You should have received a copy of the GNU General Public License |
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>. |
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/** |
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* The mod_bigbluebuttonbn locallib/bigbluebutton. |
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* |
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* @package mod_bigbluebuttonbn |
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* @copyright 2010 onwards, Blindside Networks Inc |
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
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* @author Jesus Federico (jesus [at] blindsidenetworks [dt] com) |
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*/ |
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namespace mod_bigbluebuttonbn\locallib; |
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use context_module; |
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defined('MOODLE_INTERNAL') || die(); |
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global $CFG; |
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require_once($CFG->dirroot . '/mod/bigbluebuttonbn/locallib.php'); |
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/** |
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* Wrapper for executing http requests on a BigBlueButton server. |
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* |
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* @copyright 2010 onwards, Blindside Networks Inc |
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later |
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*/ |
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class bigbluebutton { |
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/** |
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* Returns the right URL for the action specified. |
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* |
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* @param string $action |
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* @param array $data |
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* @param array $metadata |
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* @return string |
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*/ |
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public static function action_url($action = '', $data = array(), $metadata = array()) { |
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$baseurl = self::sanitized_url() . $action . '?'; |
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$metadata = array_combine( |
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array_map( |
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function($k) { |
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return 'meta_' . $k; |
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} |
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, array_keys($metadata) |
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), |
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$metadata |
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); |
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$params = http_build_query($data + $metadata, '', '&'); |
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return $baseurl . $params . '&checksum=' . sha1($action . $params . self::sanitized_secret()); |
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} |
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/** |
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* Makes sure the url used doesn't is in the format required. |
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* |
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* @return string |
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*/ |
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public static function sanitized_url() { |
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$serverurl = trim(config::get('server_url')); |
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if (substr($serverurl, -1) == '/') { |
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$serverurl = rtrim($serverurl, '/'); |
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} |
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if (substr($serverurl, -4) == '/api') { |
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$serverurl = rtrim($serverurl, '/api'); |
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} |
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return $serverurl . '/api/'; |
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} |
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/** |
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* Makes sure the shared_secret used doesn't have trailing white characters. |
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* |
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* @return string |
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*/ |
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public static function sanitized_secret() { |
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return trim(config::get('shared_secret')); |
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} |
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/** |
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* Returns the BigBlueButton server root URL. |
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* |
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* @return string |
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*/ |
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public static function root() { |
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$pserverurl = parse_url(trim(config::get('server_url'))); |
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$pserverurlport = ""; |
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if (isset($pserverurl['port'])) { |
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$pserverurlport = ":" . $pserverurl['port']; |
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} |
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return $pserverurl['scheme'] . "://" . $pserverurl['host'] . $pserverurlport . "/"; |
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} |
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/** |
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* Get BBB session information from viewinstance |
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* |
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* @param object $viewinstance |
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* @return mixed |
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* @throws \coding_exception |
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* @throws \dml_exception |
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* @throws \moodle_exception |
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* @throws \require_login_exception |
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* @throws \required_capability_exception |
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*/ |
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public static function build_bbb_session_fromviewinstance($viewinstance) { |
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$cm = $viewinstance['cm']; |
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$course = $viewinstance['course']; |
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$bigbluebuttonbn = $viewinstance['bigbluebuttonbn']; |
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return self::build_bbb_session($cm, $course, $bigbluebuttonbn); |
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} |
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/** |
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* Get BBB session from parameters |
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* |
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* @param \course_modinfo $cm |
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* @param object $course |
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* @param object $bigbluebuttonbn |
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* @return mixed |
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* @throws \coding_exception |
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* @throws \dml_exception |
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* @throws \moodle_exception |
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* @throws \require_login_exception |
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* @throws \required_capability_exception |
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*/ |
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public static function build_bbb_session($cm, $course, $bigbluebuttonbn) { |
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global $CFG; |
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$context = context_module::instance($cm->id); |
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require_login($course->id, false, $cm, true, true); |
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require_capability('mod/bigbluebuttonbn:join', $context); |
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// Add view event. |
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bigbluebuttonbn_event_log(\mod_bigbluebuttonbn\event\events::$events['view'], $bigbluebuttonbn); |
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// Create array bbbsession with configuration for BBB server. |
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$bbbsession['course'] = $course; |
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$bbbsession['coursename'] = $course->fullname; |
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$bbbsession['cm'] = $cm; |
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$bbbsession['bigbluebuttonbn'] = $bigbluebuttonbn; |
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self::view_bbbsession_set($context, $bbbsession); |
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$serverversion = bigbluebuttonbn_get_server_version(); |
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$bbbsession['serverversion'] = (string) $serverversion; |
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// Operation URLs. |
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$bbbsession['bigbluebuttonbnURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/view.php?id=' . $cm->id; |
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$bbbsession['logoutURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/bbb_view.php?action=logout&id=' . $cm->id . |
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'&bn=' . $bbbsession['bigbluebuttonbn']->id; |
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$bbbsession['recordingReadyURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/bbb_broker.php?action=recording_' . |
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'ready&bigbluebuttonbn=' . $bbbsession['bigbluebuttonbn']->id; |
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$bbbsession['meetingEventsURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/bbb_broker.php?action=meeting' . |
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'_events&bigbluebuttonbn=' . $bbbsession['bigbluebuttonbn']->id; |
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$bbbsession['joinURL'] = $CFG->wwwroot . '/mod/bigbluebuttonbn/bbb_view.php?action=join&id=' . $cm->id . |
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'&bn=' . $bbbsession['bigbluebuttonbn']->id; |
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return $bbbsession; |
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} |
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/** |
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* Build standard array with configurations required for BBB server. |
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* |
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* @param \context $context |
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* @param array $session |
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* @throws \coding_exception |
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* @throws \dml_exception |
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*/ |
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View Code Duplication |
public static function view_bbbsession_set($context, &$session) { |
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global $CFG, $USER; |
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$session['username'] = fullname($USER); |
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$session['userID'] = $USER->id; |
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$session['administrator'] = is_siteadmin($session['userID']); |
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$participantlist = bigbluebuttonbn_get_participant_list($session['bigbluebuttonbn'], $context); |
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$session['moderator'] = bigbluebuttonbn_is_moderator($context, $participantlist); |
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$session['managerecordings'] = ($session['administrator'] |
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|| has_capability('mod/bigbluebuttonbn:managerecordings', $context)); |
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$session['importrecordings'] = ($session['managerecordings']); |
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$session['modPW'] = $session['bigbluebuttonbn']->moderatorpass; |
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$session['viewerPW'] = $session['bigbluebuttonbn']->viewerpass; |
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$session['meetingid'] = $session['bigbluebuttonbn']->meetingid.'-'.$session['course']->id.'-'. |
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$session['bigbluebuttonbn']->id; |
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$session['meetingname'] = $session['bigbluebuttonbn']->name; |
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$session['meetingdescription'] = $session['bigbluebuttonbn']->intro; |
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$session['userlimit'] = intval((int) config::get('userlimit_default')); |
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if ((boolean) config::get('userlimit_editable')) { |
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$session['userlimit'] = intval($session['bigbluebuttonbn']->userlimit); |
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} |
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$session['voicebridge'] = $session['bigbluebuttonbn']->voicebridge; |
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if ($session['bigbluebuttonbn']->voicebridge > 0) { |
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$session['voicebridge'] = 70000 + $session['bigbluebuttonbn']->voicebridge; |
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} |
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$session['wait'] = $session['bigbluebuttonbn']->wait; |
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$session['record'] = $session['bigbluebuttonbn']->record; |
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$session['recordallfromstart'] = $CFG->bigbluebuttonbn_recording_all_from_start_default; |
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if ($CFG->bigbluebuttonbn_recording_all_from_start_editable) { |
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$session['recordallfromstart'] = $session['bigbluebuttonbn']->recordallfromstart; |
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} |
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$session['recordhidebutton'] = $CFG->bigbluebuttonbn_recording_hide_button_default; |
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if ($CFG->bigbluebuttonbn_recording_hide_button_editable) { |
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$session['recordhidebutton'] = $session['bigbluebuttonbn']->recordhidebutton; |
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} |
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$session['welcome'] = $session['bigbluebuttonbn']->welcome; |
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if (!isset($session['welcome']) || $session['welcome'] == '') { |
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$session['welcome'] = get_string('mod_form_field_welcome_default', 'bigbluebuttonbn'); |
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} |
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if ($session['bigbluebuttonbn']->record) { |
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// Check if is enable record all from start. |
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if ($session['recordallfromstart']) { |
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$session['welcome'] .= '<br><br>'.get_string('bbbrecordallfromstartwarning', |
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'bigbluebuttonbn'); |
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} else { |
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$session['welcome'] .= '<br><br>'.get_string('bbbrecordwarning', 'bigbluebuttonbn'); |
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} |
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} |
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$session['openingtime'] = $session['bigbluebuttonbn']->openingtime; |
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$session['closingtime'] = $session['bigbluebuttonbn']->closingtime; |
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$session['muteonstart'] = $session['bigbluebuttonbn']->muteonstart; |
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$session['context'] = $context; |
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$session['origin'] = 'Moodle'; |
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$session['originVersion'] = $CFG->release; |
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$parsedurl = parse_url($CFG->wwwroot); |
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$session['originServerName'] = $parsedurl['host']; |
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$session['originServerUrl'] = $CFG->wwwroot; |
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$session['originServerCommonName'] = ''; |
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$session['originTag'] = 'moodle-mod_bigbluebuttonbn ('.get_config('mod_bigbluebuttonbn', 'version').')'; |
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$session['bnserver'] = bigbluebuttonbn_is_bn_server(); |
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$session['clienttype'] = config::get('clienttype_default'); |
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if (config::get('clienttype_editable')) { |
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$session['clienttype'] = $session['bigbluebuttonbn']->clienttype; |
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} |
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if (!config::clienttype_enabled()) { |
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$session['clienttype'] = BIGBLUEBUTTON_CLIENTTYPE_FLASH; |
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} |
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} |
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/** |
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* Can join meeting. |
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* |
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* @param int $cmid |
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* @return array|bool[] |
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* @throws \coding_exception |
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* @throws \dml_exception |
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* @throws \moodle_exception |
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* @throws \require_login_exception |
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* @throws \required_capability_exception |
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*/ |
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public static function can_join_meeting($cmid) { |
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global $CFG; |
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$canjoin = array('can_join' => false, 'message' => ''); |
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$viewinstance = bigbluebuttonbn_view_validator($cmid, null); |
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if ($viewinstance) { |
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$bbbsession = self::build_bbb_session_fromviewinstance($viewinstance); |
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if ($bbbsession) { |
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require_once($CFG->dirroot . "/mod/bigbluebuttonbn/brokerlib.php"); |
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$info = bigbluebuttonbn_get_meeting_info($bbbsession['meetingid'], false); |
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$running = false; |
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if ($info['returncode'] == 'SUCCESS') { |
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$running = ($info['running'] === 'true'); |
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} |
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$participantcount = 0; |
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if (isset($info['participantCount'])) { |
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$participantcount = $info['participantCount']; |
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} |
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$canjoin = bigbluebuttonbn_broker_meeting_info_can_join($bbbsession, $running, $participantcount); |
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} |
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} |
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return $canjoin; |
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} |
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} |
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Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.