join now recreates conference if necessary

6 files changed, 137 insertions, 10 deletions

diff --git a/actions/event_calendar/join_conference.php b/actions/event_calendar/join_conference.php
new file mode 100644
index 000000000..9eb8f0da9
--- /dev/null
+++ b/actions/event_calendar/join_conference.php
@@ -0,0 +1,20 @@
+<?php
+// extended logic for BBB
+elgg_load_library('elgg:event_calendar');
+
+$event_guid = get_input('event_guid');
+$event = get_entity($event_guid);
+if (elgg_instanceof($event,'object','event_calendar')) {
+	// make sure that the conference still exists, and if not, try recreating it	
+	if (event_calendar_conference_exists($event)) {
+		event_calendar_join_conference($event);
+	} else if (event_calendar_create_bbb_conf($event)) {
+		event_calendar_join_conference($event);
+	} else {
+		register_error(elgg_echo('event_calendar:couldnotjoin'));
+		forward($event->getURL());
+	}
+} else {
+	register_error(elgg_echo('event_calendar:error_nosuchevent'));
+	forward('event_calendar/list');
+}
diff --git a/languages/en.php b/languages/en.php
index 3fd9cf7cb..3b6f7f249 100644
--- a/languages/en.php
+++ b/languages/en.php
@@ -328,7 +328,9 @@ You can visit the event page here:
 	'event_calendar:bbb_server_url' => "Big Blue Button server URL (must end with slash)",
 	'event_calendar:bbb_security_salt' => "Big Blue Button security salt",
 	'event_calendar:bbb_create_error' => "Error: unable to create BBB conference, message was: %s",
+	'event_calendar:conference_create_error' => "Error: unable to create web conference.",
 	'event_calendar:bbb_settings_error' => "Error: must set conference URL and salt in plugin settings",
+	'event_calendar:couldnotjoin' => "Error: unable to join conference.",
 	'event_calendar:join_conf_button' => "Join conference",
 			
 	'event_calendar:poll_suffix' => "(poll)",
diff --git a/models/model.php b/models/model.php
index 32a9c928a..6680409db 100644
--- a/models/model.php
+++ b/models/model.php
@@ -184,7 +184,9 @@ function event_calendar_set_event_from_form($event_guid,$group_guid) {
 	}
 	if ($event->save()) {
 		if (!$event_guid && $event->web_conference) {
-			event_calendar_create_bbb_conf($event);
+			if (!event_calendar_create_bbb_conf($event)) {
+				register_error(elgg_echo('event_calendar:conference_create_error'));
+			}
 		}
 		if ($group_guid && (elgg_get_plugin_setting('autogroup', 'event_calendar') == 'yes')) {
 			event_calendar_add_personal_events_from_group($event->guid,$group_guid);
@@ -2282,7 +2284,7 @@ function event_calendar_queue_reminder($e) {
 	}
 }
 
-function event_calendar_create_bbb_conf($event) {
+/*function event_calendar_create_bbb_conf($event) {
 	$bbb_security_salt = elgg_get_plugin_setting('bbb_security_salt','event_calendar');
 	$bbb_server_url = rtrim(elgg_get_plugin_setting('bbb_server_url','event_calendar'), '/') . '/';
 	if ($bbb_security_salt) {
@@ -2311,11 +2313,11 @@ function event_calendar_create_bbb_conf($event) {
 	    // close curl resource to free up system resources
 	    curl_close($ch);
 	    
-	    /*error_log("BBB create request:");
-	    error_log($bbb_server_url.'api/create?'.$params);
+	    #error_log("BBB create request:");
+	    #error_log($bbb_server_url.'api/create?'.$params);
 		
-	    error_log("BBB create response:");
-	    error_log($output);*/
+	    #error_log("BBB create response:");
+	    #error_log($output);
 	    
 		$xml = new SimpleXMLElement($output);
 		if ($xml->returncode == 'SUCCESS') {
@@ -2327,6 +2329,108 @@ function event_calendar_create_bbb_conf($event) {
 	} else {
 		register_error(elgg_echo('event_calendar:bbb_settings_error'));
 	}
+}*/
+
+// utility function for BBB api calls
+function event_calendar_bbb_api($api_function,$params=NULL) {
+	
+	$bbb_security_salt = elgg_get_plugin_setting('bbb_security_salt','event_calendar');
+	$bbb_server_url = rtrim(elgg_get_plugin_setting('bbb_server_url','event_calendar'), '/') . '/';
+	if ($bbb_security_salt) {
+		if (isset($params) && is_array($params) && count($params) > 0) {
+			$query = array();
+			foreach($params as $k => $v) {
+				$query[] = $k.'='.rawurlencode($v);
+			}
+			$qs = implode('&',$query);
+		} else {
+			$qs = '';
+		}
+		$checksum = sha1($api_function.$qs.$bbb_security_salt);
+		if ($qs) {
+			$qs .= "&checksum=$checksum";
+		}
+		
+		// create curl resource
+	    $ch = curl_init();
+	
+	    // set url
+	    curl_setopt($ch, CURLOPT_URL, $bbb_server_url.'api/'.$api_function.'?'.$qs);
+	
+	    //return the transfer as a string
+	    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+	
+	    // $output contains the output string
+	    $output = curl_exec($ch);
+	
+	    // close curl resource to free up system resources
+	    curl_close($ch);
+	    
+	    error_log("BBB api call: ".$api_function);
+	    error_log(print_r($params,TRUE));		
+	    error_log("BBB response: \n".$output);
+		return $output;
+	} else {
+		return FALSE;
+	}		
+}
+
+function event_calendar_create_bbb_conf($event) {
+	$day_in_minutes = 60*24;
+	$now = time();
+	// fix duration bug
+	# $duration = (int)(($event->real_end_time-$event->start_date)/60)+$day_in_minutes;
+	$duration = (int)(($event->real_end_time-$now)/60)+$day_in_minutes;
+	$title = urlencode($event->title);
+	$output = event_calendar_bbb_api('create',array('meetingID'=>$event->guid,'name'=>$title,'duration'=>$duration));
+	if ($output) {	    
+		$xml = new SimpleXMLElement($output);
+		if ($xml->returncode == 'SUCCESS') {
+			$event->bbb_attendee_password = (string) $xml->attendeePW;
+			$event->bbb_moderator_password = (string) $xml->moderatorPW;
+			return TRUE;
+		} else {
+			return FALSE;
+		}
+	} else {
+		return FALSE;
+	}
+}
+
+// checks to see if a BBB conference is actually running
+function event_calendar_is_conference_running($event) {
+	$output = event_calendar_bbb_api('isMeetingRunning',array('meetingID'=>$event->guid));	
+	if (!$output) {
+		return FALSE;
+	} else {
+		$xml = new SimpleXMLElement($output);
+		if ($xml->returncode == 'SUCCESS' && $xml->running == 'true') {
+			return TRUE;
+		} else {
+			return FALSE;
+		}
+	}
+}
+
+// checks to see if a BBB conference exists
+function event_calendar_conference_exists($event) {
+	$output = event_calendar_bbb_api('getMeetingInfo',array('meetingID'=>$event->guid,'password'=>$event->bbb_moderator_password));	
+	if (!$output) {
+		return FALSE;
+	} else {
+		$xml = new SimpleXMLElement($output);
+		if ($xml->returncode == 'SUCCESS' && $xml->meetingID == $event->guid) {
+			return TRUE;
+		} else {
+			return FALSE;
+		}
+	}
+}
+
+// forwards to the join link
+// this function assumes that the conference is running
+function event_calendar_join_conference($event) {
+	forward(event_calendar_get_join_bbb_url($event));
 }
 
 function event_calendar_get_join_bbb_url($event) {
diff --git a/start.php b/start.php
index 49312599f..ad635c598 100644
--- a/start.php
+++ b/start.php
@@ -110,7 +110,7 @@ function event_calendar_init() {
 	elgg_register_action("event_calendar/remove_from_group_members","$action_path/remove_from_group_members.php");
 	elgg_register_action("event_calendar/manage_subscribers","$action_path/manage_subscribers.php");
 	elgg_register_action("event_calendar/modify_full_calendar","$action_path/modify_full_calendar.php");
-
+	elgg_register_action("event_calendar/join_conference","$action_path/join_conference.php");
 }
 
 /**
diff --git a/views/default/event_calendar/conference_button.php b/views/default/event_calendar/conference_button.php
index baa30cc68..79fa9c5a2 100644
--- a/views/default/event_calendar/conference_button.php
+++ b/views/default/event_calendar/conference_button.php
@@ -2,7 +2,7 @@
 // A non-admin / non-event-creator only sees the button if they have the event on his/her personal calendar 
 // and it is at most 15 minutes before the conference starts.
 
-// The button is removed for everyone (even admins) one day after the conference ends.
+// The button is removed for everyone (even admins) one day after the event end time.
 
 $event = $vars['event'];
 
@@ -21,10 +21,11 @@ if ($event) {
 	}
 	if ( $in_time_window ) {
 		$button = elgg_view('output/url', array(
-			'href' => event_calendar_get_join_bbb_url($event),
+			'href' => 'action/event_calendar/join_conference?event_guid='.$event->guid,
 			'text' => elgg_echo('event_calendar:join_conf_button'),
 			'class' => 'elgg-button elgg-button-action',
 			'target' => '_blank',
+			'is_action' => TRUE,
 		));
 	
 		echo '<div class="event-calendar-conf-join-button">'.$button.'</div>';
diff --git a/views/default/forms/event_calendar/edit.php b/views/default/forms/event_calendar/edit.php
index 2ba744fc4..c2210c5f8 100644
--- a/views/default/forms/event_calendar/edit.php
+++ b/views/default/forms/event_calendar/edit.php
@@ -7,7 +7,7 @@ $schedule_options = array(
 	elgg_echo('event_calendar:schedule_type:fixed')=>'fixed',
 );
 
-if (elgg_plugin_exists('event_poll')) {
+if (elgg_is_active_plugin('event_poll')) {
 	$schedule_options = array_merge(array(elgg_echo('event_calendar:schedule_type:poll')=>'poll'),$schedule_options);
 }