app.js

var express        = require('express');
var app            = express();
var server         = require('http').Server(app);
var cors           = require('cors');
var bodyParser     = require('body-parser');
var mongoose       = require('mongoose');
var io             = require('socket.io')(server);
var expressSession = require('express-session');
var compression    = require('compression')
var MongoStore     = require('connect-mongo')(expressSession);
var morgan         = require('morgan');
var CronJob        = require('cron').CronJob;
mongoose.connect('mongodb://localhost/raspberry-api-dev');
mongoose.set('debug', true);
// mongoose.connect('mongodb://raspi:raspi@ds011261.mlab.com:11261/iot-raspi-db');
// If the connection throws an error
mongoose.connection.on('error',function (err) {  
  console.log('Mongoose default connection error: ' + err);
}); 

// When the connection is disconnected
mongoose.connection.on('disconnected', function () {  
  console.log('Mongoose default connection disconnected'); 
});

var corsOrigin = process.env.NODE_ENV === "production" ? "http://prismetic.cran.io" : "http://127.0.0.1:3000";
app.use(cors({origin: corsOrigin, credentials: true}));
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(morgan('dev'));
app.use(compression())

//Passport Session
var passport = require('./app/config/passport')
app.use(expressSession({
  secret: 'mySecretPrismeticKey',
  resave: true,
  saveUninitialized: true,
  cookie: {maxAge:  3600000},
  store: new MongoStore({mongooseConnection: mongoose.connection})
}));
app.use(passport.initialize());
app.use(passport.session());

//Defining Routes.
var routes = require('./app/routes/routes')(io, passport);
app.use('/', routes);

server.listen(process.env.PORT || 8080, function() {
  console.log("Server listen at port: 8080");
});

io.on('connection', function(socket) {
  console.log('User ' + socket.id + ' connected at ' + Date.now());
  socket.on('disconnect', function() {
    console.log('User disconnected at ' + Date.now());
  });
});

//Logger middleware.
if (process.env.NODE_ENV === 'production') {
  app.use(function(err, req, res, next) {
    console.log(err)
    res.status(err.status || 500);
    res.send({
      message: err.message
    });
  });
}

app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  console.log(err)
  res.send({
    error: err
  });
});

//Cron job at 01:00 am.
var job = new CronJob('00 00 1 * * *', () => {
  require('./app/services/cron').run();
}, () => {
  console.log("[CronJob] Stops");
});

// require('./app/services/cron').run();
job.start();