server.js

//
// # SimpleServer
//
// A simple chat server using Socket.IO, Express, and Async.
//
var http = require('http');
var path = require('path');

var async = require('async');
var socketio = require('socket.io');
var express = require('express');

//
// ## SimpleServer `SimpleServer(obj)`
//
// Creates a new instance of SimpleServer with the following options:
//  * `port` - The HTTP port to listen on. If `process.env.PORT` is set, _it overrides this value_.
//
var router = express();
var server = http.createServer(router);
var io = socketio.listen(server);

router.use(express.static(path.resolve(__dirname, 'client')));
var messages = [];
var sockets = [];
var nbPlayers=0;
var socketLab;

io.on('connection', function (socket) {

      sockets.push(socket);
   
      socket.on('disconnect', function () {
        
          socketLab.emit('removePlayer',socket.id);
      
      });
      
      socket.on('lab', function (name) 
      {
          socketLab=socket;
      });
      
      socket.on('move', function (dirPlayer) 
      {
        var infos={id:socket.id,dir:dirPlayer};
        socketLab.emit('move',infos);
      });
      
      socket.on('newPlayer', function (infosPlayer)
      {
          socketLab.emit('newPlayer',{id:socket.id,col:infosPlayer.col,name:infosPlayer.name});
      });
      
    
  });



server.listen(process.env.PORT || 3000, process.env.IP || "0.0.0.0", function(){
  var addr = server.address();
  console.log("Chat server listening at", addr.address + ":" + addr.port);
});