app.js

require('dotenv').config();
const createError = require('http-errors');
const express = require('express');
const path = require('path');
const session = require("express-session");
const passport = require('./config/passport');
const connection = require('./config/database');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const User = require('./models/users');

const indexRouter = require('./routes/index');
const signupRouter = require('./routes/signup');
const loginRouter = require('./routes/login');
const secretPageRouter = require('./routes/secretPage');
const adminRouter = require('./routes/admin');

const app = express();

// mongoose connection
connection;

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

// middleware
app.use(session({ secret: process.env.SECRET, resave: false, saveUninitialized: true }));
app.use(passport.initialize());
app.use(passport.session());
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

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

passport.deserializeUser(async (id, done) => {
  try {
    const user = await User.findById(id);
    done(null, user);
  } catch(err) {
    done(err);
  };
});

// routes
app.use('/', indexRouter);
app.use('/signup', signupRouter);
app.use('/login', loginRouter);
app.use('/secret', secretPageRouter);
app.use('/admin', adminRouter);

// 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;