middleware.js

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



module.exports.isLoggedIn = (req, res, next) => {
    req.session.returnTo = req.originalUrl
    if(!req.isAuthenticated()){
        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, 404)
    }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 review = await Review.findById(reviewID)
    if(!review.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, 404)
    }else{
        next()
    }
}