app.js

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

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 viewRouter = require('./Routes/viewRoutes');
const compression = require('compression');

const app = express();

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

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

// Security HTTP headers
app.use(helmet());

// limiting requests from same API
const limiter = rateLimit({
  max: 100,
  windowMs: 60 * 60 * 1000,
  message: 'Too many requests from this IP, please try again in an hour',
});
app.use('/api', limiter);


app.use(morgan('dev')); 

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

// Data sanitization against NoSQl query injection
app.use(mongoSanitize());

// Data sanitization against XSS
app.use(xss());

// Preventing parameter pollution
app.use(hpp());
app.use(compression());

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

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) => {

  next(new AppError(`Can't find ${req.originalUrl} on this server}`, 404)); 
});

app.use(globalErrorHandler);
module.exports = app;