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)=>{
   
    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.redirectUrl = req.session.redirectUrl; // Corrected from req.locals to res.locals
    }
    next();
};

module.exports.isOwnner = async (req, res, next) => {
    const { id } = req.params;
    const listing = await Listing.findById(id);
    if (!listing.owner.equals(res.locals.currUser._id)) {
        req.flash("error", "You are not 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(500,errMsg);
    }else{
      next();
    }
  }
  module.exports.isReviewAuthor = async (req, res, next) => {
    const {id,reviewID} = req.params;
   let review = await Review.findById(reviewID);
    if (!review.author.equals(res.locals.currUser._id)) {
        req.flash("error", "You are not owner of this review!");
        return res.redirect(`/listings/${id}`);
    }

    next();
};