app.js

// Dependencies
var express = require('express');
var socket_io = require("socket.io");
var routes = require('./routes/index');

// Instance of express
var app = express();

// Socket.io
var io = socket_io();
app.io = io;

// Require the socketServer
var socketServer = require('./socket/socketServer.js')(io);

// Set public folder for static files
app.use(express.static('public'));
app.use('/', routes);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.json({
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  var errorStatus = err.status || 500;
  res.status(errorStatus);
  res.send(errorStatus + ' ' + err.message);
});


module.exports = app;