main.js

var ws = require("nodejs-websocket")


let Game = function() {
	this.gameProgress = 1;
	this.playerConnections = [];

	this.startGame = function() {
		this.demandResponse();
	};

	this.addPlayer = function(connection) {
		this.playerConnections.push(connection);
		connection.send("WELCOME PLAYER");
		if (this.playerConnections.length === 1) {
			this.startGame();
		}
	};

	this.demandResponse = function() {
		let connection = this.playerConnections[this.gameProgress % this.playerConnections.length];

		connection.send("YOUR NUMBER IS UP");	
		connection.send(this.gameProgress.toString());	
	};

	this.expectedMessage = function() {

		if (this.gameProgress % 35 === 0) {
			return "barrels & casks";
		}

		if (this.gameProgress % 7 === 0) {
			return "barrels";
		}

		if (this.gameProgress % 5 === 0) {
			return "casks";
		}

		return this.gameProgress.toString();

	}

	this.progress = function () {
		this.gameProgress += 1;
		this.demandResponse();
	}

	this.nextPlayer = function() {
	}
}


let game = new Game();

var server = ws.createServer(function (conn) {
	console.log("New connection")

	game.addPlayer(conn);


	conn.on("text", function (str) {

		str = str || "";
		console.log("Received "+str)
		conn.sendText(str.toUpperCase()+"!!!")

		if (str === game.expectedMessage()) {
			conn.sendText("You win this time");
		} else {
			conn.sendText("DRINK!");
		}

		game.progress();
	})


	conn.on("close", function (code, reason) {
		console.log("Connection closed")
	})
}).listen(8001)