Realtime Notifications

My little playground to play around with realtime events and things like that. This project covers:

It's entirely written in NodeJS using the SailsJS Framework. For additional credits see below.

Click on the Register button
Register a bunch of users
Log into each of the users simultaneously (by using Chrome Incognito mode, other browsers, devices, whatever)
Send notifications / messages to users
Win again

After logging in the client is subscribed to a room for his (user_notifications_{id}) notifications (see api/controllers/NotificationsController@subscribe)
Every time a notification is created a message is broadcast to the receivers notifications room (see api/models/Notification.js@afterCreate)
Client reacts to notifications (see assets/js/app.js@Line~61)

The Connections service is responsible for managing connections (basically just stores and/or removes user IDs from the memory).

After logging in every client is subscribed to a room called users_online (see api/controller/ConnectionController@subscribe). The request returns a list of all connected users to show it on client (see aseets/js/app.js@Line~9)
Whenever a user logs in a message is broadcast to the users_online room (see api/controller/ConnectionController@subscribe)
Whenever a user disconnects (or logs out) it gets removed by the Connections service. In case the user doesn't return within three second it can be considered as "offline" and a message is broadcast (see config/sockets@afterDisconnect). The delay is required due to refreshing a page is technically a disconnect.

asiantrongnguyen / Realtime-Notifications