middleware.js

const {campgroundSchema, reviewSchema} = require('./schemas');
const Campground = require('./models/campground');
const Review = require('./models/review');
const ExpressError = require('./utils/ExpressError');

module.exports.validateCampground = (req, res, next) => {
    console.log(req.body);
    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.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 campground = await Campground.findById(req.params.id);
    if (!campground.author.equals(req.user._id)) {
        req.flash("error", "You have no permission to edit this campground!")
        return res.redirect(`/campgrounds/${req.params.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 have no permission to delete this review!");
        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();
    }
}