app.js

var express = require('express');
    app = express(),
    fs = require('fs'),
    open = require('open'),
    opn  = require('opn'),
    WebSocket = require('ws');


var options = {
  key: fs.readFileSync('./fake-keys/privatekey.pem'),
  cert: fs.readFileSync('./fake-keys/certificate.pem')
};

var serverPort = (process.env.PORT  || 4443),
    https = require('https'),
    http = require('http'),
    server,
    advertismentProtocol = 'http';

if (process.env.LOCAL) {
  server = https.createServer(options, app);
} else {
  server = http.createServer(app);
}
var io = new WebSocket.Server({ server });
//var io = new WebSocket.Server({ port : wsPort, host : serverHost }); //new WebSocket.Server({ port: serverPort });
//console.log('WS Server listening on ', serverHost, ":", wsPort);

app.get('/', function(req, res){
  console.log('get /');
  res.sendFile(__dirname + '/index.html');
});

server.listen(serverPort, function(){
  console.log('Server up and running at %s port', serverPort);
});



var count = 0,
    clients = []
    isAppRunningInChrome = false;

io.on('connection', function(socket) {
  var id = clients.length == 0 ? 0: clients.length;
  clients[id] = socket;
  socket['unique_id'] = id;
  console.log((new Date()) + ' Connection accepted [' + id + ']. AND LENGTH IS ', clients.length);
  
  if(!isAppRunningInChrome) {
    console.log("OPENING CHROME TAB");
    opn('http://localhost:'+serverPort, {app: ['chrome']});
    isAppRunningInChrome = true;
  }
  socket.on('message', function incoming(message) {
    var msg = JSON.parse(message);
    io.broadcast(message);
  });

	socket.on('close', function(code, message){
    console.log("SOCKET UNIQUE ID IS ", socket.unique_id);
		clients.splice(socket.unique_id,1);
    console.log((new Date()) + ' DELETING SOCKET AT POSITION ' + socket.unique_id + ' disconnected. COUNT IS ', clients.length);
    
  });
});

io.broadcast = function(data) {
  // Loop through all clients
  for(var i in clients){
    if(clients[i].readyState === WebSocket.OPEN) {
      // Send a message to the client with the message
      clients[i].send(data);
    }
  }
/*
	io.clients.forEach(function each(client) {
		if (client.readyState === WebSocket.OPEN) {
			client.send(data);
		}
	});*/
};



/*
function socketIdsInRoom(name) {
  var socketIds = io.nsps['/'].adapter.rooms[name];
  if (socketIds) {
    var collection = [];
    for (var key in socketIds) {
      collection.push(key);
    }
    return collection;
  } else {
    return [];
  }
}
function socketIdsInRoom(name) {
  var socketIds = io.nsps['/'].adapter.rooms[name];
  if (socketIds) {
    var collection = [];
    for (var key in socketIds) {
      collection.push(key);
    }
    return collection;
  } else {
    return [];
  }
}

io.on('connection', function(socket){
  console.log('connection');
  socket.on('disconnect', function(){
    console.log('disconnect');
    if (socket.room) {
      var room = socket.room;
      io.to(room).emit('leave', socket.id);
      socket.leave(room);
    }
  });

  socket.on('join', function(name, callback){
    console.log('join', name);
    var socketIds = socketIdsInRoom(name);
    callback(socketIds);
    socket.join(name);
    socket.room = name;
  });


  socket.on('exchange', function(data){
    console.log('exchange', data);
    data.from = socket.id;
    var to = io.sockets.connected[data.to];
    to.emit('exchange', data);
  });
});
*/