Sockets: making messaging real-time

[skassam21]

• Add socket support on the front-end and back-end so that the messages are real-time
• use this package socket.io for real-time notifications
• Setup socket server on the backend
• Setup client connection (should connect if the user is authed, add some layer of security would be best)
• We also want an object to keep track of which users are currently connected - for simplicity, you can for now just use an in-memory variable (like a dictionary or object in the back-end - not recommended for scability, but it works for this project)

[changmeng72]

Please refer to chat.js at the root directory.

Updated status is broadcast to all online users in realtime ,and saved into backend database at same time.