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middleware.js
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middleware.js
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// Description: This file contains all the middleware functions used in the application.
const Listing = require("./models/listing.js");
const Review = require("./models/review.js");
const ExpressError = require("./utils/ExpressError.js");
const { listingSchema, reviewSchema, userSchema } = require("./schema.js");
module.exports.isLoggedIn = (req, res, next) => {
//console.log(req, "..", req.path, "..", req.originalUrl);
req.session.redirectUrl = req.originalUrl;//passport reset session after autentication
if (!req.isAuthenticated()) {
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;
const listing = await Listing.findById(id);
if (!listing.owner.equals(res.locals.currUser._id)) {
req.flash("error", "You are not the owner of this listing!");
return res.redirect(`/listings/${id}`);
}
next();
};
module.exports.preprocessListingData = (req, res, next) => {
const removeEmptyStrings = (obj) => {
for (let key in obj) {
if (typeof obj[key] === 'object' && obj[key] !== null) {
removeEmptyStrings(obj[key]);
} else if (obj[key] === '') {
obj[key] = undefined; // Convert empty strings to undefined
}
}
};
removeEmptyStrings(req.body);
next();
};
module.exports.validateListing = (req, res, next) => {
let { error, value } = listingSchema.validate(req.body);
if (error) {
let errMsg = error.details.map((el) => el.message).join(",");
throw new ExpressError(400, errMsg);
} else {
req.body = value;
next();
}
};
module.exports.validateReview = (req, res, next) => {
let { error } = reviewSchema.validate(req.body);
if ( error ) {
let errMsg = error.details.map((el) => el.message).join(",");
throw new ExpressError(400, errMsg);
} else {
next();
}
}
module.exports.isReviewAuthor = async (req, res, next) => {
let { id, reviewId } = req.params;
let review = await Review.findById(reviewId);
if (!review.author.equals(res.locals.currUser._id)) {
req.flash("error", "You are not the author of this review!");
return res.redirect(`/listings/${id}`);
}
next();
}
module.exports.validateUser = (req, res, next) => {
let { error } = userSchema.validate(req.body);
if ( error ) {
let errMsg = error.details.map((el) => el.message).join(",");
throw new ExpressError(400, errMsg);
} else {
next();
}
}