middleware.js

const Listing = require("./models/listing");
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 must be logged in to create a listing");
        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);
    if(!listing.owner.equals(res.locals.currUser._id)) {
        req.flash("error", "You are not the owner of this listing")
        return res.redirect(`/listing/${id}`);
    }
    next();
};

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