cardGame/server.js

const express = require('express');
const database = require('./database');
const cardGen = require('./cardGen');
const roomMod = require('./roomMod');
const app = express();
const http = require('http').Server(app);
const port = process.env.PORT || 3000;

const io = require('socket.io')(http);
// util is what nodejs uses for console.log, but has a depth of 2 set
// so console.logs show [Array]/[Object] instead of useful info.
// This can be overridden console.log(util.inspect(LOGDATA, true, 4, true))
// 4 being new depth, true (last one) is to show colours
const util = require('util')

app.use(express.static(__dirname + '/public'));

http.listen(port, () => console.log('listening on port ' + port));
database.connect();

io.on('connection', onConnection);

// Variables
let	numRooms = 0;
let	numRoomsToPreGen = 1;
const	maxRooms = 3;
const	maxPlayersPerRoom = 2;
const	maxSpectatorsPerRoom = 0;

// All the room
//let data = []; // Normal array
let data = {}; // Object array (this one for returning to player, and JSON stringify while keeping named ids)
let roomData = {};
for (let roomId = 1; roomId <= numRoomsToPreGen; roomId++) {
	// Never have more rooms than max rooms!!!
	if(numRooms > maxRooms){
		break;
	}

	createRoom(roomId);
}

function onConnection(socket){

	console.log('+ User connected');
	console.log('');

	socket.on('requestRooms', function(filter) {
		requestRooms(socket, filter);
	});

	socket.on('requestJoinRoom', function(playerName, roomId) {
		requestJoinRoom(socket, playerName, roomId);
	});

	socket.on('requestCreateRoom', function(playerName) {
		requestCreateRoom(socket, playerName);
	});

}

function requestRooms(socket, filter){
	console.log('+ requestRooms recieved');
	console.log('- filter: '+filter);

	let response = getRooms(filter, dump = true);
        io.to(socket.id).emit('returnRooms', response);

	console.log('');
}

function getRooms(filter = 'all', dump = false){
	console.log('+ getRooms');
	let response = {
		random:		'randomStuff',
		roomData:	roomData,
	};

	if(dump){
		console.log(response);
		console.log('');
	}

	return response;
}

function requestCreateRoom(socket, playerName){
	console.log('+ createRoom recieved');
	console.log('- requested by: '+playerName);

	response = createRoom(roomId = false, dump = true);
	io.to(socket.id).emit('returnCreateRoom', response);

	if(response.success){
		let response = getRooms(filter = 'all', dump = true);
		io.to(socket.id).emit('returnRooms', response);
	}

	console.log('');
}

function createRoom(roomId = false, dump = true){
	let roomName = false;
	if(roomId == false){
		roomId = numRooms + 1;
	}
	console.log(roomId);

	let response = {	
		success:	false,
		message:	'No idea bossman'
	};

	// Max room limit reached
	console.log(numRooms);
	console.log(maxRooms);
	if(numRooms >= maxRooms){
		console.log('- Room limit reached');

		response = {	
			success:	false,
			message:	'No space '+numRooms+' out of '+maxRooms+' created.'
		};

	// Create room
	}else{
		console.log('- Creating room')
		let room = {};
		room['id'] = roomId;
		room['name'] = 'Room:'+room['id'];
		roomName = room['name'];
		room['password'] = '';
		room['timeout'] = {};
		room['timeout']['s'] = 10;
		room['people'] = 0;
		room['playerIds'] = {};

		//room['deck'] = [];
		//room['turn'] = 0;

		// Removed players for now, players may be seperate
		// and back-end only with an assoc. to current room
		
		//let players = {};
		//for (let j = 0; j < maxPlayersPerRoom; j++) {
			//let p = {};
			//p['id'] = 0;
			//p['name'] = "";
			//p['hand'] = {};
			//players[j] = p;
		//}

		//room['players'] = players;
		roomData[roomId] = room;
		numRooms = numRooms + 1;

		response = {	
			success:	true,
			message:	'Room Created: '+roomName,
		};
	}

	if(dump){
		console.log(response);
		console.log('');
	}
	return response;
}

// TODO: break into requestJoinRoom, and JoinRoom?
// Maybe not needed here? As won't be done via backend?
// TODO: Need a 'leave room'/disconnect
function requestJoinRoom(socket, playerName, roomId){

	console.log('+ requestJoinRoom recieved');

	let room = roomData[roomId];

	// Add socket for playerName so that players in room get
	// responses, etc. from the room (something like that)

	// Add player to socket object, so it can be referred to
	// as each socket is individual to a player, but rooms need to
	// emit to multiple players. These .player can be used in loops

	// https://socket.io/docs/v4/rooms/
	// https://stackoverflow.com/a/18096649
	socket.playerId = playerName;

	if(room === undefined){
		io.to(socket.id).emit('responseRoom', 'error');
		console.log('>> Room does not exist');
	}

	let roomName = 'Room_' + roomId;
	let people = room['people'];
	// people = io.sockets.adapter.rooms[roomId].length; // This gets the sockets in the room (i.e. the players)

	//console.log(util.inspect(io.sockets.adapter.rooms, true, 4, true))
	//console.log('- people(socket: '+io.sockets.adapter.rooms[player]+')');
	//console.log('- maxPlayersPerRoom: '+maxPlayersPerRoom);

	if(isUserInRoom(playerName, roomId)){
		console.log('Already in room');
		return false;
	}

	if (people < maxPlayersPerRoom) {

		// Update people in room count
		people = room['people'] += 1;

		// Add playerId to room (playerName for now while Ids don't exist TODO)
		room['playerIds'][playerName] = playerName;

		// https://socket.io/docs/v4/rooms/
		// https://stackoverflow.com/a/25028953
		socket.join(roomId);
		
		// https://stackoverflow.com/a/25028953
		//console.log(util.inspect(io.sockets.adapter.rooms.get(roomId), true, 4, true))
		/*
		let clients = io.sockets.adapter.rooms.get(roomId);
		let numClients = clients ? clients.size : 0;
		for (const clientId of clients) {
			//this is the socket of each client in the room.
			const clientSocket = io.sockets.sockets.get(clientId);
			console.log(clientSocket.playerId); // The playerId set beggining of func.
		}
		*/

		console.log('>> User ' + playerName +
		' connected on ' + roomName + ' (' + (people) + '/' + maxPlayersPerRoom + ')');

		// Joined room (emit to the player that just joined)
		io.to(socket.id).emit('responseJoinRoom', roomName);

		if (people >= maxPlayersPerRoom) {
			console.log('- starting game');
			// startGame for room
			startGame(roomId);
		}

	}

}

// Will need to be different to playerName in future (in case dupes)
// would use playerId TODO
function isUserInRoom(playerName, roomId){
	if(playerName in roomData[roomId]['playerIds']){
		return true;
	}
	return false;
}

function startGame(roomId){

	console.log('>> Room: ' + roomId + ': Requesting game...');
	let people = roomData[roomId].players;
	/*
	try {
		//people = io.sockets.adapter.rooms.get(roomId).size;
	} catch (e) {
		console.log('>> Room: ' + roomId + ': No people here...');
		return;
	}
	*/

	// For now, if there's 2 people only. Will need changing for
	// 3v1, 5v1, 2v2, etc...

	let response = {success: false, message: 'Failed requestStartGame() server.js'};
	if(people < maxPlayersPerRoom){
		console.log('Too few people');
	}

	console.log('>> Room: ' + roomId + ': Starting');


	// https://stackoverflow.com/a/25028953
	//console.log(util.inspect(io.sockets.adapter.rooms.get(roomId), true, 4, true))
	let clients = io.sockets.adapter.rooms.get(roomId);

	/*
	for (const clientId of clients) {
		//this is the socket of each client in the room.
		const clientSocket = io.sockets.sockets.get(clientId);
		console.log(clientSocket.playerId); // The playerId set in requestJoin

		// Just so I know how to access stuff in future.
		console.log(roomData[roomId].playerIds[clientSocket.playerId] + 'is in the game');
	}
	*/

	// This should return the deck data, etc. for each client
	// ideally only returning the items that the user can/should
	// see i.e. shouldn't give them the inDeck card list just a counter
	// shouldn't have opponent card data/their hand shouldn't be flipped
	roomMod.roomGeneration().then(data => {
		response.success = true;
		response.message = data;
		// Each player then gets the roomGeneration stuff
		for (const clientId of clients) {
			const clientSocket = io.sockets.sockets.get(clientId);
			console.log('>> responseStartGame: '+clientSocket.playerId);
			// Emit to client socket
			io.to(clientSocket.id).emit('responseStartGame', response);
		}
			
	})
	.catch(err => {
		response.message = err;
		// Each player then gets the error message
		for (const clientId of clients) {
			const clientSocket = io.sockets.sockets.get(clientId);
			// Emit to client socket
			io.to(clientSocket.id).emit('responseStartGame', err);
		}
	});

}

// Then do functions like this?
function shuffleDeck(roomId, playerId){

}