middleware.js

const appError = require('./utils/errorClass');
const { hotelSchema, reviewSchema } = require('./validate.js');
const Hotel = require('./models/hotel');
const Review = require('./models/review');

module.exports.isLoggedIn = (req, res, next) => {
    if (!req.isAuthenticated()) {
        req.session.returnTo = req.originalUrl;
        req.flash('error', 'You must be signed in first!');
        return res.redirect('/login');
    }
    next();
}

module.exports.isAuthor = async(req, res, next) => {
    const { id } = req.params;
    const hotel = await Hotel.findById(id);
    if (!hotel.author.equals(req.user._id)) {
        req.flash('error', 'You do not have permission to do that');
        return res.redirect(`/hotels/${id}`);
    }
    next();
}

module.exports.isReviewAuthor = async(req, res, next) => {
    const { id, reviewId } = req.params;
    const review = await Review.findById(reviewId);
    if (!review.author.equals(req.user._id)) {
        req.flash('error', 'You do not have permission to do that');
        return res.redirect(`/hotels/${id}`);
    }
    next();
}

module.exports.validateHotel = (req, res, next) => {
    const { error } = hotelSchema.validate(req.body);
    if (error) {
        const msg = error.details.map(e => e.message).join(',');
        throw new appError(msg, 400);
    } else {
        next();
    }
}

module.exports.validateReview = (req, res, next) => {
    const { error } = reviewSchema.validate(req.body);
    if (error) {
        const msg = error.details.map(e => e.message).join(',');
        next(new appError(msg, 400));
    } else {
        next();
    }
}