app.js

var state = "smile";

var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);

app.use(express.static('public'));

function stateHandler(request,response){
	state = request.path.replace("/", "");
	response.redirect("/");
}

app.get("/smile", stateHandler);
app.get("/frown", stateHandler);
app.get("/neutral", stateHandler);

app.get("/state", function(request,response){
	response.send(state);
});
var port = process.env.PORT || 5000;

io.on('connection', function(socket){
  console.log('a user connected');
});

app.listen(port, function() {
  console.log("Listening on " + port);
});