middleware.js

const Listing= require("./models/listing");
const Review = require("./models/review");
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 new 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._id.equals(res.locals.currUser._id)){
        req.flash("error","You are not the owner of this listing");
        return res.redirect(`/listings/${id}`);
    }

    next();
}

module.exports.isReviewAuthor= async(req,res,next)=>{
    let { id, reviewId } = req.params;

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

    next();
}


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