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')
        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  campground = await Campground.findById(id)
    if(!campground.author.equals(req.user._id)){
        req.flash('error', 'You dont have permission to do make changes')
        return res.direct(`/campgrounds/${id}`)
    }
    next()
}

module.exports.storeReturnTo = (req, res, next) => {
    if (req.session.returnTo) {
        res.locals.returnTo = req.session.returnTo;
    }
    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 dont have permission to do make changes')
        return res.direct(`/campgrounds/${id}`)
    }
    next()
}