middleware.js

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

module.exports.isLoggedIn =(req, res, next) => {
    if(!req.isAuthenticated()) {
      req.session.redirectUrl = req.originalUrl;
      req.flash("error", "Please LoggedIn to create Listing!");
    return res.redirect("/users/auth");
  }
  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 Permission To EDIT!");
    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(400 , errMsg);
      }
      else{
        next();
      }
    };


module.exports.processAmenities = (req, res, next) => {
  const allAmenities = [
    'wifi', 'kitchen', 'workDesk', 'freeParking', 'hdtv', 
    'SeperateBathroom', 'hairDryer', 'fridge', 'smokeAlarm', 
    'washingMachine', 'cctv', 'lift'
  ];

  if (!req.body.listing) {
    req.body.listing = {};
  }

  const incomingAmenities = req.body.listing.amenities || {};
  const processedAmenities = {};

  allAmenities.forEach(amenity => {
    processedAmenities[amenity] = incomingAmenities[amenity] === 'on';
  });

  req.body.listing.amenities = processedAmenities;
  
  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 Don't Have Permission To Delete!");
    return res.redirect(`/listings/${id}`);
  }

  next();
};