Added group membership notifications

RestControllers/GroupsController.php

@@ -381,6 +381,10 @@ class GroupsController {
 		//Try to respond to the invitation
 		if(!components()->groups->respondInvitation(userID, $groupID, $accept))
 			Rest_fatal_error(500, "An error occurred while trying to respond to membership invitation!");
+		
+		//Push notification
+		create_group_membership_notification(userID, 0, $groupID, 
+			$accept ? Notification::ACCEPTED_GROUP_MEMBERSHIP_INVITATION : Notification::REJECTED_GROUP_MEMBERSHIP_INVITATION);
 
 		//Success
 		return array("success" => "The response to the invitation was saved!");
@@ -406,6 +410,9 @@ class GroupsController {
 		if(!components()->groups->deleteRequest(userID, $groupID))
 			Rest_fatal_error(500, "An error occurred while trying to cancel membership request!");
 		
+		//Delete group membership notifications
+		delete_notifications_group_membership(userID, $groupID);
+
 		return array("success" => "The request has been successfully cancelled!");
 	}
 
@@ -443,6 +450,11 @@ class GroupsController {
 		if(!components()->groups->insertMember($member))
 			Rest_fatal_error(500, "Could not register membership!");
 		
+		//Push notification
+		if($info->get_registration_level() == GroupInfo::MODERATED_REGISTRATION)
+			create_group_membership_notification(userID, 0, $groupID, 
+				Notification::SENT_GROUP_MEMBERSHIP_REQUEST);
+
 		//Success
 		return array("success" => "The membership has been successfully saved!");
 	}
@@ -481,6 +493,9 @@ class GroupsController {
 		//Delete the membership
 		if(!components()->groups->deleteMembershipWithStatus($userID, $groupID, $level))
 			Rest_fatal_error(500, "Could not delete membership!");
+		
+		//Delete group membership notifications
+		delete_notifications_group_membership($userID, $groupID);
 
 		//Success
 		return array("success" => "The membership has been successfully deleted!");
@@ -556,6 +571,10 @@ class GroupsController {
 		if(!components()->groups->respondRequest($userID, $groupID, $accept))
 			Rest_fatal_error(500, "Could not respond to the membership request!");
 		
+		//Push notification
+		create_group_membership_notification($userID, userID, $groupID, 
+			$accept ? Notification::ACCEPTED_GROUP_MEMBERSHIP_REQUEST : Notification::REJECTED_GROUP_MEMBERSHIP_REQUEST);
+
 		//Success
 		return array("success" => "The response to the request has been successfully saved!");
 	}
@@ -605,6 +624,9 @@ class GroupsController {
 		if(!components()->groups->deleteInvitation($userID, $groupID))
 			Rest_fatal_error(500, "Could not cancel membership invitation!");
 
+		//Delete group membership notifications
+		delete_notifications_group_membership($userID, $groupID);
+
 		//Success
 		return array("success" => "Membership invitation has been cancelled !");
 	}
@@ -655,6 +677,9 @@ class GroupsController {
 		if(!components()->groups->deleteMembershipWithStatus(userID, $groupID, $level))
 			Rest_fatal_error(500, "An error occurred while trying to delete your membership!");
 		
+		//Delete group membership notifications
+		delete_notifications_group_membership(userID, $groupID);
+
 		//Success
 		return array("success" => "Your membership has been successfully deleted!");
 	}

classes/components/notifications.php

@@ -198,6 +198,28 @@ class notificationComponent {
 			return $this->push_private($notification);
 
 		}
+
+		//Handles groups membership notifications
+		else if($notification->get_on_elem_type() == Notification::GROUP_MEMBERSHIP){
+
+			//Complete the notification
+			$notification->set_from_container_id(0);
+			$notification->set_from_container_type("");
+			
+			//Check whether the notification has to be pushed to a single user
+			//or to all the moderators of the page
+			if($notification->has_dest_user_id())
+
+				//Push the notification in private way (if it has a destination,
+				//generally the target of the membership request)
+				return $this->push_private($notification);
+			
+			else {
+				//Push the notification to all the moderators of the group
+				return $this->push_group_moderators($notification, $notification->get_on_elem_id());
+			}
+
+		}
 		
 		//Unsupported element
 		else {
@@ -206,6 +228,28 @@ class notificationComponent {
 		
 	}
 
+	/**
+	 * Push a notification to all the moderators of a group
+	 * 
+	 * @param Notification $notification The notification to push
+	 * @param int $groupID The ID of the target group
+	 * @return bool TRUE for a success / FALSE else
+	 */
+	private function push_group_moderators(Notification $notification, int $groupID) : bool {
+
+		//Get the list of the moderators of the group
+		$members = components()->groups->getListMembers($groupID);
+		$moderators = array();
+
+		foreach($members as $member){
+			if($member->get_level() <= GroupMember::MODERATOR)
+				$moderators[] = $member->get_userID();
+			
+		}
+
+		return $this->push_public($notification, $moderators);
+	}
+
 	/**
 	 * Push a notification to several users
 	 * 

classes/models/Notification.php

@@ -25,6 +25,7 @@ class Notification {
 	const POST_SURVEY = "post_survey";
 	const COMMENT = "comment";
 	const FRIENDSHIP_REQUEST = "friend_request";
+	const GROUP_MEMBERSHIP = "group_membership";
 
 	/**
 	 * Event type
@@ -35,6 +36,12 @@ class Notification {
 	const REJECTED_FRIEND_REQUEST = "rejected_friend_request";
 	const ELEM_CREATED = "elem_created";
 	const ELEM_UPDATED = "elem_updated";
+	const SENT_GROUP_MEMBERSHIP_INVITATION = "sent_group_membership_invitation";
+	const ACCEPTED_GROUP_MEMBERSHIP_INVITATION = "accepted_group_membership_invitation";
+	const REJECTED_GROUP_MEMBERSHIP_INVITATION = "rejected_group_membership_invitation";
+	const SENT_GROUP_MEMBERSHIP_REQUEST = "sent_group_membership_request";
+	const ACCEPTED_GROUP_MEMBERSHIP_REQUEST = "accepted_group_membership_request";
+	const REJECTED_GROUP_MEMBERSHIP_REQUEST = "rejected_group_membership_request";
 
 	/**
 	 * Event visibility
@@ -159,6 +166,10 @@ class Notification {
 	 */
 	public function set_from_user_id(int $from_user_id){
 		$this->from_user_id = $from_user_id;
+
+		//Check if we have to reset the value
+		if($from_user_id < 0)
+			$this->from_user_id = null;
 	}
 
 	/**
@@ -186,6 +197,10 @@ class Notification {
 	 */
 	public function set_dest_user_id(int $dest_user_id){
 		$this->dest_user_id = $dest_user_id;
+
+		//Reset the value if required
+		if($dest_user_id < 0)
+			$this->dest_user_id = null;
 	}
 
 	/**

db_struct.sql

@@ -151,7 +151,7 @@ CREATE TABLE `comunic_notifications` (
   `dest_user_id` int(11) DEFAULT NULL,
   `on_elem_id` int(11) DEFAULT NULL,
   `on_elem_type` varchar(25) DEFAULT NULL,
-  `type` varchar(25) DEFAULT NULL,
+  `type` varchar(50) DEFAULT NULL,
   `visibility` varchar(20) DEFAULT NULL,
   `from_container_id` int(11) DEFAULT NULL,
   `from_container_type` varchar(25) DEFAULT NULL,

helpers/notifications.php

@@ -57,6 +57,36 @@ function delete_notifications_friendship_request(int $userOne, int $userTwo) : b
 	return true;
 }
 
+/**
+ * Delete all the notifications related to a group membership
+ * 
+ * @param int $userID The ID of the target user
+ * @param int $groupID The ID of the target group
+ * @return bool TRUE for a success / FALSE else
+ */
+function delete_notifications_group_membership(int $userID, int $groupID) : bool {
+	
+	user_login_required();
+
+	//Create notification object
+	$notification = new Notification();
+	$notification->set_on_elem_type(Notification::GROUP_MEMBERSHIP);
+	$notification->set_on_elem_id($groupID);
+
+	//Delete notifications
+	$notification->set_dest_user_id($userID);
+	$notification->set_from_user_id(-1);
+	if(!components()->notifications->delete($notification))
+		return false;
+	
+	$notification->set_dest_user_id(-1);
+	$notification->set_from_user_id($userID);
+	if(!components()->notifications->delete($notification))
+		return false;
+
+	return true;
+}
+
 /**
  * Create and push a friendship request notification
  * 
@@ -80,6 +110,46 @@ function create_friendship_notification(int $fromUser, int $destUser, string $ki
 	$notif->set_on_elem_type(Notification::FRIENDSHIP_REQUEST);
 	$notif->set_type($kind);
 
+	//Try to push the notification
+	return components()->notifications->push($notif);
+}
+
+/**
+ * Create and push a group membership  notification
+ * 
+ * @param int $userID The ID of the target user for the membershp
+ * @param int $moderatorID The ID of the moderator creating the notification (0 if it is the user)
+ * @param int $groupID The ID of the target group
+ * @param string $kind The kind of notification to create
+ * @return bool TRUE in case of success / FALSE else
+ */
+function create_group_membership_notification(int $userID, int $moderatorID, int $groupID, string $kind) : bool {
+
+	//Delete all the previous notifications
+	if(!delete_notifications_group_membership($userID, $groupID))
+		return false;
+	
+	//Create the notification
+	$notif = new Notification();
+	$notif->set_time_create(time());
+	$notif->set_on_elem_id($groupID);
+	$notif->set_on_elem_type(Notification::GROUP_MEMBERSHIP);
+	$notif->set_type($kind);
+
+	if($moderatorID < 1){
+
+		//The notification must be sent to all the moderators of the group
+		$notif->set_from_user_id($userID);
+		$notif->set_dest_user_id(-1);
+
+	}
+	else {
+		//We specify both the source and the destination of the notification not
+		//to broadcast the notification to all the group members
+		$notif->set_from_user_id($moderatorID);
+		$notif->set_dest_user_id($userID);
+	}
+	
 	//Try to push the notification
 	return components()->notifications->push($notif);
 }