passport-config.js

const LocalStrategy = require("passport-local").Strategy;
const bcrypt = require("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 (err) {
            return done(err);
        };
    };
    passport.use(new LocalStrategy({ usernameField: "email" }, authenticateUser));
    passport.serializeUser((user, done) => { done(null, user.id) });
    passport.deserializeUser((id, done) => { return done(null, getUserById(id)) });
};

module.exports = initialize;