middleware.js

const {campgroundSchema}=require('./schemas.js')
const { reviewSchema } = require('./schemas.js');
const Campground=require('./models/campground.js')
const Review=require('./models/review.js')
const ExpressError=require('./utils/ExpressError.js')
module.exports.isLoggedIn = (req, res, next) => {
    if (!req.isAuthenticated()) {
        req.session.returnTo = req.originalUrl; // add this line
        req.flash('error', 'You must be signed in first!');
        return res.redirect('/login');
    }
    next();
}
module.exports.storeReturnTo = (req, res, next) => {
    if (req.session.returnTo) {
        res.locals.returnTo = req.session.returnTo;
    }
    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.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.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 do not have permission to do that ')
           return  res.redirect(`/campgrounds/${id}`)
        }
        next();
}