app.js

require('dotenv').config();
let createError = require('http-errors');

let express = require('express');
let app = express();
const errorHandler = require('./middlewares/errorHandler');

let path = require('path');
let cookieParser = require('cookie-parser');
let session = require('express-session');
let logger = require('morgan');
const exphbs = require('express-handlebars');

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

const connect = require('./config/db');
const mongoURI = process.env.MONGO_URI;
const oneDay = 1000 * 60 * 60 * 24;
//session middleware
const sessionSecret = process.env.SESSION_SECRET;
app.use(
  session({
    secret: sessionSecret,
    saveUninitialized: true,
    cookie: { maxAge: oneDay, secure: false },
    resave: false,
  })
);

app.engine(
  'hbs',
  exphbs.create({
    defaultLayout: 'main',
    extname: '.hbs',
  }).engine
);
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', indexRouter);
app.use(errorHandler);
app.use((req, res, next) => {
  res.status(404).render('error', {
    pageTitle: '404 Not Found',
    errorMessage: 'Page not found.',
  });
});

// Error route
app.get('/error', (req, res) => {
  res.status(500).render('error', {
    pageTitle: 'Error',
    errorMessage: 'An error occurred!',
  });
});

// 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');
});
let PORT = process.env.PORT || 8000;
const start = async (url) => {
  try {
    await connect(url);
    app.listen(PORT, () => {
      console.log(`http://localhost:${PORT}/`);
    });
  } catch (error) {
    console.log(error);
  }
};
start(mongoURI);
module.exports = app;