Game Server task implementation

Known limitations of this solution

• No obvious game stages ("Login", "Choose game type", "Make a decision") from the server point of view (partially implemented on the client side).
• No UI for summary page (raw JSON with users turns is shown).

Key design decisions made, especially if you considered multiple options

• Implemented as Web application on Scala Play + React
• UI interaction is based on periodical HTTP AJAX requests, but for production app something better sholuld be considered, WebSockets for example.

How to test and launch the solution

• Build and launch app

git clone https://github.com/kostafey/evolution-gaming-task.git
cd evolution-gaming-task/ui
npm install
npm run build
cd ..
sbt run

• Open 2 or more browser tabs and type http://localhost:9000/
• Type 2 or more different logins in this tabs
• Select same game types for at least 2 different players

Optional Tasks implemented

• Web UI added
• Support "multi-tabling" - players can play multiple games in parallel at once
• Any game can be turned into 3, 4 or more players per game by updating USERS_PER_GAME value.

Screenshot below shows the example.

Player "1" plays single-card-game with Player "2" and Player "1" plays double-card-game with Player "3" simultaneously.