middleware.js

const { restaurantSchema,reviewSchema } = require('./schemas.js');
const ExpressError = require('./utils/ExpressError');
const Restaurant = require('./models/restaurant');
const Review = require('./models/review')

module.exports.isLoggedIn =(req,res,next)=>{
    if(!req.isAuthenticated()){
        req.session.returnTo = req.originalUrl;
        //store the url they are requesting and redirect after they log back in
        req.flash('error','Sign In is required !');
        return res.redirect('/login');
    }
    next();
}
module.exports.validateRestaurant = (req, res, next) => {
    const { error } = restaurantSchema.validate(req.body);
    if (error) {
        const msg = error.details.map(el => el.message).join(',')
        throw new ExpressError(msg, 400)
    } else {
        next();
    }
}

module.exports.isAuthor = async(req,res,next)=>{
    const {id} = req.params;
    const restaurant = await Restaurant.findById(id);
    if(!restaurant.author.equals(req.user._id)){
        req.flash('error','You cannot perform this operation !');
        return res.redirect(`/restaurants/${id}`);
    }
    next();
}
module.exports.isReviewAuthor = async (req, res, next) => {
    const { id, reviewId } = req.params;
    const review = await Review.findById(reviewId);
    if (!review.author.equals(req.user._id)) {
        req.flash('error', 'You cannot perform this operation');
        return res.redirect(`/restaurants/${id}`);
    }
    next();
}
 module.exports.validateReview= (req,res,next)=>{
    const {error} = reviewSchema.validate(req.body);
    if (error) {
        const msg = error.details.map(el => el.message).join(',')
        throw new ExpressError(msg, 400)
    } else {
        next();
    }
}