Chat Plays 2048

It's a web app allowing two or more players to play 2048 on the same board at the same time. Kinda like Twitch Plays Pokemon.

How to run

Install dependencies
- Node
- Elixir
Run start_2048.sh

Features

Multiplayer 2048 through websockets
Anarchy and Democracy game modes
Chat and online user tracking

Backend

I chose Elixir and Phoenix as the main stack. There's no database, but there is an ETS table for backups.
- I think ETS is a viable option, because with the BEAM VM we can afford to have stateful web-servers thanks to supervision trees.
- Phoenix provides great tools for websockets and we can also have user tracking out of the box.
I wrote tests for the GameServer and for the Channels, but admittedly I wasn't able test everything properly.

Frontend

I chose React+Redux for the frontend, mainly because I work with it every day so I was able to move quickly.
To handle websockets, I wrote a redux-middleware. It's responsible for setting up the socket, joining channels, sending and receiving messages.
For styling I used styled-components, a CSS-IN-JS lib. Although the website is not responsive. :(
For testing I used mainly jest and @testing-library. They allow me to test components in a way that a user would use it, giving me more confidence it my tests.