passport_setup.js

let LocalStrategy = require('passport-local').Strategy;

let bcrypt = require("bcrypt");
let models = require('./models');

const validPassword = function(user, password){
    return bcrypt.compareSync(password, user.password);
}

module.exports = function(passport){
    passport.serializeUser(function(user, done){
        done(null, user.id)
    });

    passport.deserializeUser(function(id, done){
        models.User.findOne({
            where : {
                'id' : id
            }
        }).then(user => {
            if(user == null){
                done(new Error('Wrong user id.'))
            }
            done(null, user);
        })
    });

    passport.use(new LocalStrategy({
        usernameField : 'email',
        passwordField : 'password',
        passReqToCallback : true
    }, 
    function(req, email, password, done){
        return models.User.findOne({
            where : {
                'email' : email
            }
        }).then(user => {
            if(user==null){
                req.flash('message', 'Incorrect credentials.');
                return done(null, false);
            } else if(user.password == null || user.password == undefined){
                req.flash('message', 'You must reset your password');
                return done(null, false);
            } else if(!validPassword(user, password)){
                req.flash('message', 'Incorrect credentials!');
                return done(null, false);
            }
            return done(null, user);
        }).catch(err => {
            done(err, false);
        })
    }))
}