Message Queue

[soygul]

When a message is received from server:

• [x] Check for duplicates and update in-memory data list.
• [x] Notify listening views about the change. i.e. send them the new state.
• [x] Check for duplicates again and invoke database to persist data on disk.
• [x] Send back ACK.

When a sent message is ACKed by the server:

• [x] Invoke DB.dequeue(Message msg).
• [x] Update in-memory data list.
• [x] Notify listening views about the change. i.e. send them the new state.
• [x] Invoke database to persist new message state (delivered to server) on disk.

When sending a message:

• [x] User proper message types in each call and not the generic ones (send, enqueue, etc.).
• [x] Invoke DB.enqueue(Message msg).
• [x] Update UI.
• [x] Send message.

[soygul]

Why Worker.sendMessages and not Worker.sendMessage?

• We only send singular messages from UI.
• We might batch messages in msgQueue on connected event in Worker.

[soygul]

Worker.sendMessages is now variadic. Problem solved.