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 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 do not own the permission to edit this');
        return res.redirect(`/blogs/${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 own the permission to edit this');
        return res.redirect(`/blogs/${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()
    }
}