Quick Express Seed

express-seed.js

const
    express     = require('express'),
    logger      = require('morgan'),
    path        = require('path'),
    bodyParser  = require('body-parser'),
    serveStatic = express.static,
    MongoClient = require('mongodb').MongoClient,
    io          = require('socket.io'),
    http        = require('http');


let app = express(),
    server = http.createServer(app);

// ## View Engine Setup
// app.set('views', path.resolve('build'));
// app.set('view engine', 'html');
// app.engine('html', hbs.express4());

app.set('port', process.env.PORT || 3001);

// setup some middlewares
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
app.use(serveStatic( path.resolve('build') ));


// First connect to mongodb and then start the server
MongoClient.connect('mongodb://localhost:27017/moviedb').then(db => {
    app.set('mongodb', db); // store in express local.
    // start the server
    server.listen(app.get('port'), () => {
        console.log('Listening on: localhost:' + app.get('port'));
    });
}).catch(e => console.error('Failed to connect to mongodb. Make sure you start mongod instance.', e));


// connect to socketio.
io(server).on('connection', (socket) => {
    console.log('Socket.IO Connected. ID: ', socket.id);
    console.log(app.get('mongodb'));
    let db = app.get('mongodb');
    if(db) {
       // db calls.
    }

});