app.js

import express from 'express';
import path from 'path';
import favicon from 'serve-favicon';
import logger from 'morgan';
import cookieParser from 'cookie-parser';
import bodyParser from 'body-parser';
import session from 'express-session';
import routes from './routes/index';
import users from './routes/users';

const app = express();

import mongoose from 'mongoose';
mongoose.Promise = global.Promise;
mongoose.connect(process.env.MONGO_URL, {useMongoClient: true})
    .then(function () {
        console.log("Connected to MongoDB");
    }).catch(err => console.error(err));

// Passportjs authentication and session
const MongoStore = require('connect-mongo')(session);
app.use(session({
  secret: process.env.SESSION_SECRET,
  resave: false,
  saveUninitialized: false,
  store: new MongoStore({ mongooseConnection: mongoose.connection })
}));

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/users', users);

// catch 404 and forward to error handler
app.use((req, res, next) => {
  const 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((err, req, res, next) => {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use((err, req, res, next) => {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});


app.listen(8080, function(){
    console.log('Example app listening on port 8080!');
});