middleware.js

const ExpressError = require('./utils/ExpressError.js')
const {campgroundSchema} = require('./schemas.js');
const Campground = require('./models/campground.js');
const {reviewSchema} = require('./schemas.js');
const Review = require('./models/review.js')
/**
 * Middleware to check whether the user is logged in or not
 */

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 campground = await Campground.findById(id);
    if(!campground.author.equals(req.user._id)){
        req.flash('error' , 'You dont 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 dont 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();
    }
}