app.js

const express = require('express');
const path = require('path');
const morgan = require('morgan');
const rateLimit = require('express-rate-limit');
const helmet = require('helmet');
const mongoSanitize = require('express-mongo-sanitize');
const xssClean = require('xss-clean');
const hpp = require('hpp');
const cookieParser = require('cookie-parser');
const compression = require('compression');
const cors = require('cors');

const AppError = require('./utils/appError');
const globalErrorHandler = require('./controllers/errorController');
const tourRouter = require('./routes/tourRoutes');
const userRouter = require('./routes/userRoutes');
const reviewRouter = require('./routes/reviewRoutes');
const bookingRouter = require('./routes/bookingRoutes');
const bookingController = require('./controllers/bookingController');
const viewRouter = require('./routes/viewRoutes');

//Start express app
const app = express();

// Trusting proxy for heroku
app.enable('trust proxy');

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

// 1) GLOBAL MIDDLEWARES

// Implements CORS
app.use(cors());
// Access-Control-Allow-Origin (*)

app.options('*', cors());


// Serving static files
app.use(express.static(path.join(__dirname, 'public')));

//Set security HTTP headers
app.use(helmet());
// Development logging
if (process.env.NODE_ENV === 'development') {
  app.use(morgan('dev'));
}
// Limit request from same API
const limiter = rateLimit({
  max: 100,
  windowMs: 60 * 60 * 1000,
  message: 'Too many request from this IP please try again in an hour!'
});

app.use('/api', limiter);

app.post('/webhook-checkout', express.raw({ type: 'application/json' }), bookingController.webhookCheckout);
// Body parser, reading data from the body into req.body
app.use(
  express.json({
    limit: '10kb'
  })
);

app.use(express.urlencoded({ extended: true, limit: '10kb' }));

app.use(cookieParser());


// Data santization against NoSQL query injection
app.use(mongoSanitize());
// Data santization against XSS
app.use(xssClean());
// Prevent parameter pollution
app.use(hpp({
  whitelist: [
    'duration', 'ratingsQuantity', 'ratingsAverage', 'maxGroupSize', 'difficulty', 'price'
  ]
}));

app.use(compression());
// Test middleware
app.use((req, res, next) => {
  // console.log('Hello from the middleware 👋');
  next();
});

app.use((req, res, next) => {
  req.requestTime = new Date().toISOString();
  next();
});

// app.get('/', (req, res) => {
//     res.status(200).json({
//         message: 'Hello from the server side!',
//         app: 'Natours'
//     });
// });

// app.post('/', (req, res) => {
//     res.send('You can post to this endpoint...');
// });

// 3) ROUTES


app.use('/', viewRouter);
app.use('/api/v1/tours', tourRouter);
app.use('/api/v1/users', userRouter);
app.use('/api/v1/reviews', reviewRouter);
app.use('/api/v1/bookings', bookingRouter);

app.all('*', (req, res, next) => {
  // const err = new Error(`Can't find ${req.originalUrl} on this server!`);
  // err.status = 'fail';
  // err.statusCode = 404;
  next(new AppError(`Can't find ${req.originalUrl} on this server!`, 404));
});
app.use(globalErrorHandler);
// 4) START SERVER
module.exports = app;