middleware.js

const { campgroundSchema, reviewSchema } = require("./schemas.js");
const ExpressError = require('./utils/ExpressError');
const CampGround = require('./models/camgGround');
const Review = require('./models/review');

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

module.exports.validateCamp = (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 are not authorized 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 are not authorized 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();
    }
};