server.js

// Loading evnironmental variables here
require('dotenv').config()

const express = require('express')
const bodyParser = require('body-parser')
const morgan = require('morgan')
const multer = require("multer")
const session = require('express-session')
const MongoStore = require('connect-mongo')(session)
const dbConnection = require('./db') // loads our connection to the mongo database
const routes = require("./routes");
const passport = require('./passport')
const app = express()

const PORT = process.env.PORT || 3001

// ===== Middleware ====
app.use(morgan('dev'))
app.use(
	bodyParser.urlencoded({
		extended: false
	})
)
app.use(bodyParser.json())
app.use(
	session({
		secret: process.env.APP_SECRET || 'this is the default passphrase',
		store: new MongoStore({ mongooseConnection: dbConnection }),
		resave: false,
		saveUninitialized: false
	})
)

app.use(function(req, res, next) {
	res.header("Access-Control-Allow-Origin", "*");
	res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
	next();
  });

// ===== Passport ====
app.use(passport.initialize())
app.use(passport.session()) // will call the deserializeUser

// ===== testing middleware =====
app.use(function(req, res, next) {
	console.log('===== passport user =======')
	console.log(req.session)
	console.log(req.user)
	console.log('===== END =======')
	next()
})
// testing
app.get(
	'/auth/google/callback',
	(req, res, next) => {
		console.log(`req.user: ${req.user}`)
		console.log('======= /auth/google/callback was called! =====')
		next()
	},
	passport.authenticate('google', {
		successRedirect: 'http://localhost:3000',
		failureRedirect: 'http://localhost:3000/login'
	})
)

/* Express app ROUTING */
//app.use(multer({ dest: "/tmp/img_uploads"}).single("photo"));
//app.use(multer({ dest: "/tmp/audio_uploads"}).single("audio-comment"));
app.use(routes);

// ====== Error handler ====
app.use(function(err, req, res, next) {
	console.log('====== ERROR =======')
	console.log(err);
	console.error(err.stack)
	res.status(500)
})

// ==== Starting Server =====
app.listen(PORT, () => {
	console.log(`App listening on PORT: ${PORT}`)
})