middleware.js

const {campgroundSchema, reviewSchema} = require('./schemas.js')
const ExpressError = require('./utils/ExpressError');
const campground = require('./models/campground');
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.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 camp = await campground.findById(id);
    if(!camp.author.equals(req.user._id)){
        req.flash('error', 'You don 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 review = await Review.findById(reviewId);
    if(!review.author.equals(req.user._id)){
        req.flash('error', 'You don 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();
    }
}