app.js

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 compression = require('compression');


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 app = express();

// Limit requests frome 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(compression());

// Set security HTTP headers
app.use(helmet());

// Body parser, reading data from body into req.body
app.use(express.json({limit: '10kb'}));

// Data sanitiziation against NoSQL injection
app.use(mongoSanitize());

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

// Data sanitization pollution
app.use(hpp({
    whitelist: [
        'duration', 'ratingsAverage', 'ratingsQuantity', 'maxGroupSize', 'difficulty', 'price'
    ]
}));
// Serving static files
app.use(express.static(`${__dirname}/public`));

// Test middleware
app.use((req, res, next) => {
    // console.log(req.headers);
    next();
})

if(process.env.NODE_ENV === 'development'){
    app.use(morgan('dev'));
}

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

app.all('*', (req, res, next) => {
    next(new AppError(`Can't find ${req.originalUrl} on this server`, 404));
});

app.use(globalErrorHandler);

module.exports = app;