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server.js
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server.js
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'use strict';
var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.use(express.static(__dirname + '/public'));
var argv = require('yargs')
.usage('Usage: -p [port]')
.default('p', 4321)
.argv;
var gameCounter = 0;
var used = [];
var games = {};
function handleGame (game) {
var gameID = used.shift();
if (!gameID || games[gameID]) {
gameID = ++gameCounter;
}
game.gameID = gameID;
game.count = 0;
game.players = {};
game.on('disconnect', function () {
Object.keys(game.players).forEach(function (player) {
game.players[player].emit('disconnect');
});
used.push(gameID);
delete games[gameID];
});
game.on('updatePlayer', function (msg) {
var toPlayer = msg.playerID;
if (game.players[toPlayer]) {
game.players[toPlayer].emit('message', msg);
}
});
game.on('broadcast', function (msg) {
Object.keys(game.players).forEach(function (p) {
game.players[p].emit('message', msg);
});
});
games[gameID] = game;
game.emit('gameID', gameID);
}
function handlePlayer (player) {
player.on('join', function (gameID) {
gameID = parseInt(gameID, 10);
if (!games[gameID]) {
return player.emit('joined', { 'error': 'This game session does not exist' });
}
var g = games[gameID];
if (player.hasOwnProperty('gameID')) {
return player.emit('joined', { 'error': 'The player is already part of game ' + player.gameID });;
}
player.gameID = gameID;
player.id = g.count++;
g.players[player.id] = player;
g.emit('addPlayer', { 'playerID': player.id });
player.emit('message', { 'cmd': 'joined'});
});
player.on('disconnect', function () {
if (player.gameID && games[player.gameID]) {
games[player.gameID].emit('removePlayer', { 'playerID': player.id });
delete games[player.gameID].players[player.id];
}
});
player.on('update', function (msg) {
if (player.gameID && games[player.gameID]) {
msg.playerID = player.id;
games[player.gameID].emit('updatePlayer', msg);
}
});
}
// Handle all the connections
io.on('connection', function (socket) {
socket.on('type', function (msg) {
if (msg === 'game') {
handleGame(socket);
} else if (msg === 'player') {
handlePlayer(socket);
} else {
socket.disconnect();
}
});
});
http.listen(argv.p, function(){
console.log('Server listening on port', argv.p);
});