passport-config.js

import { Strategy } from 'passport-local';
import bcrypt from 'bcrypt';

function initialize(passport, getUserByEmail, getUserById){
    const authenticateUser = async (email, password, done) => {
        const user = getUserByEmail(email);
        
        if(user == null) {
           return done(null, false, {message: 'no user with that email!'});
        }

        try {
            if (await bcrypt.compare(password, user.password)) {
                return done(null, user)
              } else {
                return done(null, false, { message: 'Password incorrect' })
              }
        } catch {
            return done(e);
        }
    }
    
   passport.use(new Strategy({ usernameField: 'email' }, authenticateUser));
   passport.serializeUser((user, done) => done(null, user.id));
   passport.deserializeUser((id, done) => done(null, getUserById(id)));
};

export default initialize;