middleware.js

const Listing = require('./models/listing');
const Review = require('./models/review');
const ExpressError = require('./utils/ExpressError.js');
const { listingValidationSchema,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 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 don't have permisson ");
    return res.redirect(`/listings/${id}`)
  }
next();
};

module.exports.validateListing = (res,req, next) => {
  let { error } = listingValidationSchema.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(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 author this review ");
    return res.redirect(`/listings/${id}`)
  }
next();
};