middleware.js

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

module.exports.isLoggedIn = (req, res, next)=>{
    //console.log("REQ.USER...", req.user);
    if(!req.isAuthenticated()){
        req.session.returnTo = req.originalUrl;
        req.flash('error', 'you must be signed in');
        return res.redirect('/login');
    }
    next();
} 

module.exports.storeReturnTo = (req, res, next)=>{
     if(req.session.returnTo){
        res.locals.returnTo = req.session.returnTo;
     }
     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 are not allowed to do that');
        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 are not allowed to do that');
        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();
    }
}