app.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var session = require('express-session');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
require('dotenv').config()
const passport = require("passport");
const LocalStrategy = require("passport-local").Strategy;
var bcrypt = require('bcryptjs');
var User = require('./models/user');

var indexRouter = require('./routes/index');

var app = express();

//Set up mongoose connection
var mongoose = require('mongoose');
var dev_db_url = 'mongodb://127.0.0.1/members_only';
var mongoDB = process.env.MONGODB_URI || dev_db_url;
mongoose.connect(mongoDB, { useNewUrlParser: true, useUnifiedTopology: true });
var db = mongoose.connection;
db.on('error', console.error.bind(console, 'MongoDB connection error:'));

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

passport.use(
  new LocalStrategy((username, password, done) => {
    User.findOne({ username: username }, (err, user) => {
      if (err) {
        return done(err);
      }
      if (!user) {
        return done(null, false, { message: "Incorrect username" });
      }
      bcrypt.compare(password, user.password, function (err, res) {
        if (err) return next(err);
        if (!res) {
          return done(null, false, { message: "Incorrect password" });
        } else {
          return done(null, user);
        }
      });
    });
  })
);

app.use(logger('dev'));
app.use(express.json());
app.use(session({ secret: process.env.SECRET, resave: false, saveUninitialized: true }));
app.use(passport.initialize());
app.use(passport.session());

passport.serializeUser(function(user, done) {
  done(null, user);
});

passport.deserializeUser(function(user, done) {
  done(null, user);
});

app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;