middleware.js

const { campgroundSchema, reviewSchema } = require('./schemas.js');
const expressError = require('./utils/expressError');
const Campground = require('./models/campground');
const Review = require('./models/review');
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.storeReturnTo = (req, res, next) => {
    if (req.session.returnTo) {
        res.locals.returnTo = req.session.returnTo;
    }
    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();
    }
}

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.isReviewAuthor = async (req,res,next) => {
    const {id,reviewId} =req.params;
    const rev = await review.findById(reviewId)
    if(!rev.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();
    }
}