Can create groups membership notifications (moderator > user)

src/utils/NotificationsUtils.ts

@@ -70,4 +70,38 @@ export class NotificationsUtils {
 			fromUserID: userOne,
 		}));
 	}
+
+	/**
+	 * Create & push a group membership notification
+	 * 
+	 * @param userID The ID of the target user for the membership
+	 * @param moderatorID The ID of the moderator creating the notification (0 if it is the user)
+	 * @param groupID The ID of the target group
+	 * @param kind The kind of notification to create
+	 */
+	public static async CreateGroupMembershipNotification(userID: number, moderatorID: number, groupID: number, kind: NotifEventType) {
+		// TODO : Delete all previous notifications
+
+		const n = new Notif({
+			onElemID: groupID,
+			onElemType: NotifElemType.GROUP_MEMBERSHIP,
+			type: kind
+		});
+
+
+		// The notification must be sent to all the moderators of the group
+		if(moderatorID < 1) {
+			n.fromUserID = userID;
+			n.destUserID = -1;
+		}
+
+		// We specify both the source and the destination of the notification
+		// not to broadcast the notification to all the group members
+		else {
+			n.fromUserID = moderatorID;
+			n.destUserID = userID;
+		}
+
+		await NotificationsHelper.Push(n);
+	}
 }