middleware.js

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

module.exports.isLoggin = (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 dont have Permission!");
        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.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 dont have Permission!");
        return res.redirect(`/listings/${id}`);
    }
    
    next();

}