server.js

require('dotenv').config()
const express = require('express')
const app = express()
const ejs = require('ejs')
const path = require('path')
const expressLayout = require('express-ejs-layouts')
const PORT = process.env.PORT || 3300
const mongoose = require('mongoose')
const session = require('express-session')
const flash = require('express-flash')
const MongoDbStore = require('connect-mongo')(session)
const passport = require('passport')
const Emitter = require('events')
const bodyParser = require('body-parser')
// const http = require('http').Server(app);
// const io = require('socket.io')(http);
// const moment = require('moment');
// const connectedUsers = {};
const http = require('http').createServer(app);
//mongoose.set('strictQuery', true);

//database connection
mongoose.connect('mongodb://127.0.0.1:27017/hack_36', {useNewUrlParser: true, useUnifiedTopology: true, useCreateIndex: true });
const connection = mongoose.connection;
connection.once('open', () => {
    console.log('Database connected...');
}).on('error', function(err) {
    console.log(err)
});

//socket fixing
const io = require('socket.io')(http)

io.on('connection', (socket) => {
    console.log('Connected....') 

    socket.on('message', (msg) =>{        
        socket.broadcast.emit('message', msg)
    })
})
/////////////

//session store
let mongoStore = new MongoDbStore({
    mongooseConnection: connection,
    collection: 'sessions'
})

// Event emitter
const eventEmitter = new Emitter()
app.set('eventEmitter', eventEmitter)

// Session config
app.use(session({
secret: process.env.COOKIE_SECRET,
resave: false,
store: mongoStore,
saveUninitialized: false,
cookie: { maxAge: 1000 * 60 * 60 * 24 } // 24 hour
}))

// Passport config
const passportInit = require('./app/config/passport')
passportInit(passport)
app.use(passport.initialize())
app.use(passport.session())

app.use(flash())

//assets
app.use(express.static('public'))
app.use(bodyParser.urlencoded({ extended: false }))
app.use(bodyParser.json())

//global middleware
app.use((req, res, next) => {
    res.locals.session = req.session
    res.locals.user = req.user
    next()
})

//set template engine
app.use(expressLayout)
app.set('views', path.join(__dirname, '/resources/views'))
app.set('view engine', 'ejs')

require('./routes/web')(app)
app.use((req, res) => {
    res.status(404).render('error/404')
})

const server = http.listen(PORT, () => {
    console.log(`Listening on port ${PORT}`)
})