mafalda-api/services/matchmaking/randomFree.js

const io  = require('socket.io')(3555);
const nsp = io.of('/randomFree');

const crypto = require('crypto-js');
const cryptoSHA256= crypto.SHA256;


class randomFree {

	constructor() {
		nsp.on('connection', (socket) => {
		  console.log('someone connected');
		  socket.join('queue');
		  this.match();
		});
	}

	match() {
		nsp.in('queue').clients((error, clients) => {
		  	if (error) throw error;

			if(clients.length > 1) {
				let p1 = nsp.sockets[clients[0]];
				let p2 = nsp.sockets[clients[1]];
				p1.emit('test');
				p2.emit('test');
				const channel = clients[0] + clients[1];

				let err = (e) => {
					if(e)throw e;
					return 0;
				};

				p1.leave('queue', err);
				p1.join(channel, err);
				p2.leave('queue', err);
				p2.join(channel, err);

				nsp.in(channel).clients((err, clients) => {
					console.log('Channel: ' + channel);
					console.log(clients);
                    let matchInfo = this.joinGame(p1.id, p2.id);
					//possible change to 'joinFreeRandomGame' ?
					console.log("Joining Game");
					p1.emit('joinGame', matchInfo.playerOneState);
                    p2.emit('joinGame', matchInfo.playerTwoState);

                    const broadcast = (data) => {
                    	nsp.in(channel).emit('move', data);	
                    };
                    p1.on('broadcast', broadcast);
                    p2.on('broadcast', broadcast);
				});
			}

			nsp.in('queue').clients((err, clients) => {
				console.log('Queue');
				console.log(clients)
			});
		});
	}

    joinGame(playerOne, playerTwo){
	    let playerOneCards = this.createRandomCards();
	    let playerTwoCards = this.createRandomCards();
	    let setup = this.createSetupArray(playerOne, playerTwo, playerOneCards, playerTwoCards);
	    let playerOneState = {cards: playerOneCards, setup: setup};
        let playerTwoState = {cards: playerTwoCards, setup: setup};
        return {playerOneState, playerTwoState};
    }

    createSetupArray(playerOne, playerTwo, playerOneCards, playerTwoCards){
        let id = {
            playerOne: playerOne,
            playerTwo: playerTwo,
        };
	    let cards = {
	        playerOne: playerOneCards.hashedCardsArray,
            playerTwo: playerTwoCards.hashedCardsArray,
        };

	    let setup = {id, cards };
	    return setup;
	}


    createRandomCards(){
		let playerCardsArray = [];
		let saltArray = [];
		let hashedCardsArray= [];
		for (let i =0; i<5; i++){
		    let playerCard = Math.floor((Math.random()*100 )% 100 );
			let salt = crypto.lib.WordArray.random(128 / 8).toString();
            let hashedCard = cryptoSHA256(playerCard.toString + salt);
		    playerCardsArray.push(playerCard);
			saltArray.push(salt);
			hashedCardsArray.push(hashedCard.toString());
		}
    return {playerCardsArray, saltArray, hashedCardsArray};
    }

}

module.exports = new randomFree();