README

This is a little tik tak toe Ruby on Rails app to demonstrate some advanced hotwire turbo stream broadcasting functionality that is NOT a chat!

Use Case

• Tic Tac Toe game
• 2 player involved
• Can only play when both players are in the game simultaneously
• Actions of one player effect the other player’s UI

To make it interesting and have some level up in complexity we have 3 constraints that build on each other. Each constraint has its own branch so that you can check out the changes for each constraints easily.

Constraint 1

Player 1 needs to start the game and can only do so once Player 2 is present.

• Level: basic turbo stream broadcasting usage
• Branch: main

Constraint 2

Only 2 players are allowed to connect via the websocket in one game.

• Level: reject connection within ActionCable::Connection for a third player
• Branch: constraint_2

Constraint 3

Player 2 cannot be in the process without Player 1. When Player 1 leaves, Player 2 is kicked out.

• Level: Customized (ActionCable::Channel) with unsubscription logic (aka CleanUp)
• Branch: constraint_3