middleware.js

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


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

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

//owner- edit and delete//
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 owner of this listing")
    return res.redirect(`/listings/${id}`);   
}next();
};

//validate-Listinh//
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();
   }
};

// //validate-review
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();
   }
};

//owner- edit and delete//
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();
};