auth.js

const passport = require('passport');
const LocalStrategy = require('passport-local');
const bcrypt = require('bcryptjs');
const User = require("./models/User");

module.exports = {
  init: () => {
    passport.use(
      new LocalStrategy({ usernameField: 'email' }, async (email, password, done) => {
        const user = await User.findOne({where: { email }});
        if(!user) return done(null, false);
        if(!bcrypt.compareSync(password, user.password)) return done(null, false);
        return done(null, user);
      })
    );

    passport.serializeUser((user, done) => {;
      done(null, user.id);
    });

    passport.deserializeUser(async (id, done) => {
      const user = await User.findOne({where: { id }});
      done(null, user);
    });

  },
  protectRoute: (req, res, next) =>{
    if(req.isAuthenticated()) {
      return next();
    }
    res.redirect('/login?next=' + req.url);
  }
};