index.js

const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
// configure to load .env secret(s) on app/server. such as google clientId, clientSecret, callbackUrl
require('dotenv').config()
// console.log(process.env) /=/ remove this after you've confirmed it is working
const app = express();
const port = 8000;
const expressLayouts = require('express-ejs-layouts');
const db = require('./config/mongoose');
// used for session-cookies
const session = require('express-session');
const passport = require('passport');
// used for user authentication
const passportLocal = require('./config/passport-local-strategy');

// used for JWT
const passportJWT = require('./config/passport-jwt-strategy');

// used for Google Oauth
const passportGoogleOauth = require('./config/passport-google-oauth2-strategy');

const MongoStore = require('connect-mongo')(session);

const sassMiddleware = require('node-sass-middleware');

const flash = require('connect-flash');

const customeFlashMiddleware = require('./config/middleware');

// set up middleware for sass
app.use(sassMiddleware({ 
    src: './assets/scss',
    dest: './assets/css',
    debug: true,
    outputStyle: 'expanded',
    prefix: '/css'
}));

// set up middleware that parses all the urlencoded bodies.
app.use(express.urlencoded({
    extended: true
}));

// set up cookie-parser
app.use(cookieParser());

// set up static file access
app.use(express.static('./assets'));

// make the uploads path available to the browser.
app.use('/uploads', express.static(__dirname + '/uploads'));

app.use(expressLayouts);

// extract style and script form sub pages into the layout
app.set('layout extractStyles', true);
app.set('layout extractScripts', true);

// set up the view engine
app.set('view engine', 'ejs');
app.set('views', path.join(__dirname, 'views'));

// mongo store is used to store the session cookie in the db
app.use(session({
    name: 'codeial',
    // TODO change the secret before deployment in production mode
    secret: 'blahsomething',
    saveUninitialized: false,
    resave: false,
    cookie: {
        maxAge: (1000 * 60 * 100)
    },
    store: new MongoStore({
        mongooseConnection: db,
        autoRemove: 'disabled',
    }, function(error) {
        console.log(error || 'connect-mongodb setup ok');
    })
    // You can still use the callback here for handling errors during session setup
    // Just include it as a separate parameter in the options object
    // Example:
    // store: new MongoStore({
    //     mongooseConnection: db,
    //     autoRemove: 'disabled',
    // }, function (error) {
    //     console.log(error || 'connect-mongodb setup ok');
    // })
}));

app.use(passport.initialize());
app.use(passport.session());

app.use(passport.setAuthenticatedUser);

app.use(flash());
app.use(customeFlashMiddleware.setFlash);

// use express router
app.use('/', require('./routes/index'));

app.listen(port, function (error) { 
    if (error) {
        console.log(`Error in running the server: ${error}`);
    }

    console.log(`Server is running on port: ${port}`);
});