middleware.js

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

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

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

module.exports.isOwner = async(req, res, next)=>{
    let { id } = req.params;
    let listing = await Listing.findById(id);
    if(!listing.owner._id.equals(res.locals.currUser._id)){
        req.flash("error", "permission denied");
        return res.redirect(`/listings/${id}`);
    }
    next();
};

module.exports.validateListing = (req, res, next) => {
    const { error } = listingSchema.validate(req.body);
    if (error) {
        const 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();
};