server.js

//LOADING ENV VARS
import express from 'express';
import bcrypt from 'bcrypt';
import passport from 'passport';
import initializePassport from './passport-config.js';
import session from 'express-session';
import flash from 'express-flash';
import { config } from 'dotenv';
import methodOverride from 'method-override';
config();

let users = [];
initializePassport(
    passport, 
    email => users.find(user => user.email === email),
    id => users.find(user => user.id === id)
);

const app = express();
app.set('view-engine', 'ejs');
app.use(express.urlencoded({ extended: false }));
app.use(express.static('public'));
app.use(flash());
app.use(session({
    secret: process.env.SESSION_SECRET,
    resave: false,
    saveUninitialized: false
}));

app.use(passport.initialize());
app.use(passport.session());
app.use(methodOverride('_method'));

app.get('/', checkAuthenticated, (req, res) => {
    res.render('index.ejs', {name: req.user.name});
});

app.get('/login', checkNotAuthenticated, (req, res) => {
    res.render('login.ejs');
});

app.post('/login', checkNotAuthenticated, passport.authenticate('local', {
    successRedirect: '/',
    failureRedirect: '/login',
    failureFlash: true
}));

app.get('/register', checkNotAuthenticated, (req, res) => {
    res.render('register.ejs');
});

app.post('/register', checkNotAuthenticated, async (req, res) => {
   try {
        const hashedPassword = await bcrypt.hash(req.body.password, 10);
        users.push({
            id: Date.now().toString(),
            name: req.body.name,
            email: req.body.email,
            password: hashedPassword
        });
        res.redirect('/login');
   } catch {
        res.redirect('/register');
   }
});

app.delete('/logout', (req, res) => {
    req.logOut();
    res.redirect('/login');
});

function checkAuthenticated(req, res, next) {
    if (req.isAuthenticated()) {
      return next();
    }

    res.redirect('/login');
}

function checkNotAuthenticated(req, res, next) {
    if (req.isAuthenticated()) {
      return res.redirect('/');
    }
    next();
}

app.listen(3000);