middleware.js

const Campground = require('./models/campground');
const Review = require('./models/review');
const { campgroundSchema, reviewSchema } = require('./schemas');
const ExpressError = require('./utils/ExpressError');
module.exports.isLoggedIn = (req, res, next) => {
    // console.log("Waht req user", req.user);
    if(!req.isAuthenticated()){
        req.session.returnTo = req.originalUrl    //store the url they are requesting!
        req.flash('error', 'you must be signed in');
        return res.redirect('/login')
    }
    next();
}

module.exports.validateCampground = (req, res, next) => {
    const { error } = campgroundSchema.validate(req.body);
    if (error) {
        const msg = error.details.map(el => el.message).join(',')
        throw new ExpressError(msg, 400)
    } else {
        next();
    }
}

//middleware hecking author have permission to edit or delete or not 
module.exports.isAuthor = async(req, res, next) => {
    const {id} = req.params;
    const campground = await Campground.findById(id);
    if(!campground.author.equals(req.user._id)){
        req.flash('error', "You do not have permission to do that" )
        return res.redirect(`/campgrounds/${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();
    }
}

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(`/campgrounds/${id}`);

    }
    next();
}