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server.js
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server.js
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/*
* Express
*/
var express = require('express'),
app = module.exports = express.createServer();
// Configuration
app.configure(function(){
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(__dirname + '/public'));
app.use(express.logger(':remote-addr - :method :url HTTP/:http-version :status :res[content-length] - :response-time ms'));
app.use(express.favicon());
});
app.configure('development', function(){
app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
});
app.configure('production', function(){
app.use(express.errorHandler());
});
// Routes
app.get('/', function(req, res) {
res.sendfile('index.html');
});
app.listen(8080);
console.log("* Express server listening in %s mode", app.settings.env);
/*
* Socket.IO
*/
var io = require('socket.io').listen(app),
Player = require('./public/js/Player.js').Player,
players = [],
totPlayers = 0,
pings = [],
pingInterval = null,
pingEvery = 5000;
io.configure(function() {
io.enable('browser client minification');
io.set('log level', 1);
});
var serverConfig = {
maxPlayers: 32,
speed: 20,
spawnX: 100,
spawnY: 100,
mapWidth: 512,
mapHeight: 512
};
function getPlayerFromId(id) {
var length = players.length;
for(var i = 0; i < length; i++) {
if (players[i].id == id) {
return players[i];
}
}
}
function newPlayer(client) {
p = new Player(client.id, serverConfig.spawnX, serverConfig.spawnY);
players.push(p);
client.emit('join', { player: p });
client.broadcast.emit('newplayer', { player: p });
console.log('+ New player: '+ p.nick);
}
function sendPlayerList(client) {
client.emit('playerlist', { list: players }); //FIXME improve me
console.log('* Sent player list to '+ client.id);
}
// Check if coords + size is inside map
// use (x, y, 1, 1) for a point
function checkMapBounds(x, y, width, height) {
var safeX = x,
safeY = y;
if (x < 0) {
safeX = 0;
} else if ((x + width) > serverConfig.mapWidth) {
safeX = serverConfig.mapWidth - width;
}
if (y < 0) {
safeY = 0;
} else if ((y + height) > serverConfig.mapHeight) {
safeY = serverConfig.mapHeight - height;
}
return {
x: safeX,
y: safeY
};
}
// Elaborate next position, send confirmed position to client
function sendGameData(client, data) {
var oldMove = {},
nextMove = {},
safeMove = {};
var length = players.length;
for(var i = 0; i < length; i++) {
if (players[i].id == data.id) { // find the player we're referring to
oldMove.x = players[i].x;
oldMove.y = players[i].y;
switch(data.dir) { // calculate player's next position
case 'l':
nextMove.x = oldMove.x - serverConfig.speed;
nextMove.y = oldMove.y;
break;
case 'r':
nextMove.x = oldMove.x + serverConfig.speed;
nextMove.y = oldMove.y;
break;
case 'u':
nextMove.x = oldMove.x;
nextMove.y = oldMove.y - serverConfig.speed;
break;
case 'd':
nextMove.x = oldMove.x;
nextMove.y = oldMove.y + serverConfig.speed;
break;
default:
break;
}
// Check if he's going out of bounds
// if so set him to a safe position on the edge
safeMove = checkMapBounds(nextMove.x, nextMove.y, players[i].width, players[i].height)
nextMove.x = safeMove.x;
nextMove.y = safeMove.y;
//update data structure with safe position and broadcast it
players[i].x = nextMove.x;
players[i].y = nextMove.y;
io.sockets.emit('play', { id: players[i].id , x: nextMove.x, y: nextMove.y, dir: data.dir });
break;
}
}
}
// ping is intended as server -> client -> server time
function pingClients() {
var length = players.length;
for(var i = 0; i < length; i++) {
if (players[i].id) {
pings[players[i].id] = { time: Date.now(), ping: 0 };
//console.log('Ping? '+ players[i].id); //log filler
game.sockets[players[i].id].emit('ping');
}
}
}
var game = io.sockets.on('connection', function(client) {
newPlayer(client);
sendPlayerList(client);
totPlayers++;
console.log('+ Player '+ client.id +' connected, total players: '+ totPlayers);
client.emit('clientId', { id: client.id });
io.sockets.emit('tot', { tot: totPlayers });
if ((totPlayers == 1) && (pingInterval === null)) {
pingInterval = setInterval(pingClients, pingEvery);
}
client.on('play', function(data) {
//console.dir(data);
sendGameData(client, data);
});
client.on('pong', function(data) {
pings[client.id] = { ping: (Date.now() - pings[client.id].time) };
var length = players.length;
for(var i = 0; i < length; i++) {
if (players[i].id == client.id) {
players[i].ping = pings[client.id].ping;
break;
}
}
//console.log('Pong! '+ client.id +' '+ pings[client.id].ping +'ms'); //log filler
//broadcast confirmed player ping
game.emit('pingupdate', { id: client.id, ping: pings[client.id].ping });
});
client.on('disconnect', function() {
var quitter = '';
var length = players.length;
for(var i = 0; i < length; i++) {
if (players[i].id == client.id) {
quitter = players[i].nick;
players.splice(i, 1);
break;
}
}
totPlayers--;
client.broadcast.emit('quit', { id: client.id });
io.sockets.emit('tot', { tot: totPlayers });
console.log('- Player '+ quitter +' ('+ client.id +') disconnected, total players: '+ totPlayers);
if (totPlayers == 0) {
clearTimeout(pingInterval);
pingInterval = null;
}
});
});