middleware.js

const Listing = require("./models/listing");
const Review = require("./models/reviews");
const ExpressError = require("./utils/ExpressError.js");
const { listingSchema,reviewSchema } = require("./schema.js");


module.exports.isLoggedIn =(req,res,next)=>{
    if(!req.isAuthenticated()){
        req.session.redirectUrl = req.originalUrl;
        req.flash("error","You need to be logged in first to create listings!");
        return res.redirect("/login");
    }
    next();
};

module.exports.saveRedirectUrl = (req,res,next) => {
    if(req.session.redirectUrl){
        res.locals.redirectUrl = req.session.redirectUrl;
    }
    next();
};

module.exports.isOwner = async(req,res,next) => {
    let {id}= req.params;
    let listing = await Listing.findById(id);
    console.log(listing);
    if(!listing.owner.equals(res.locals.currUser._id)){
        res.flash("error","You are not the owner of this listing.");
        return res.redirect(`/listings/${id}`);
    }
    next();
};

module.exports.validateListing = (req,res,next)=>{
    let {error}  = listingSchema.validate(req.body);
    if(error){
        let errMsg = error.details.map((el) => el.message).join(",");
        throw new ExpressError(400,errMsg);
    } else{
        next();
    }
};

module.exports.validateReview = (req,res,next)=>{
    let {error}  = reviewSchema.validate(req.body);
    if(error){
        let errMsg = error.details.map((el) => el.message).join(",");
        throw new ExpressError(400,errMsg);
    } else{
        next();
    }
};

module.exports.isReviewAuthor = async(req,res,next) => {
    let {id,reviewId}= req.params;
    let review = await Review.findById(reviewId);
    if(!review.author.equals(res.locals.currUser._id)){
        req.flash("error","You are not the author of this review.");
        return res.redirect(`/listings/${id}`);
    }
    next();
};