server.js

require('babel-register');

var swig  = require('swig');
var React = require('react');
var ReactDOM = require('react-dom/server');
var Router = require('react-router');
var routes = require('./client/app/routes');

var express = require('express');
var path = require('path');
var logger = require('morgan');
var bodyParser = require('body-parser');
var app = express();
app.set('port', process.env.PORT || 3000);
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(express.static(path.join(__dirname, 'public')));

app.use(function(req, res) {
	Router.match({routes: routes.default, location: req.url}, function(err, redirectLocation, renderProps) {
		if(err) {
			res.status(500).send(err.message);
		} else if(redirectLocation){
			res.status(302).redirect(redirectLocation.pathname + redirectLocation.search);
		} if(renderProps) {
			var html = ReactDOM.renderToString(React.createElement(Router.RoutingContext, renderProps));
			var page = swig.renderFile('views/index.html', {html: html});
			res.status(200).send(page);
		} else {
			res.status(400).send('Page Not Found');
		}
	});
});


var server = require('http').createServer(app);
var io = require('socket.io')(server);
var onlineUsers = 0;

io.sockets.on('connection', function(socket) {
	onlineUsers++;

	io.sockets.emit('onlineUsers', {onlineUsers: onlineUsers});

	socket.on('disconnect', function(){
		onlineUsers--;
		io.sockets.emit('onlineUsers', {onlineUsers: onlineUsers});
	});
});


server.listen(app.get('port'), function(){
	console.log('Express server listening on port ' + app.get('port'));
});