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middleware.js
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middleware.js
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const Campground = require('./models/campground');
const Review = require('./models/review');
const { campgroundSchema, reviewSchema } = require("./schemas.js");
const ExpressError = require('./utils/ExpressError');
module.exports.isLoggedIn = (req, res, next) => {
if (!req.isAuthenticated()) {
req.session.returnTo = req.originalUrl;
req.flash("alert", "You Must Be Signed In First!! (請先登入)");
return res.redirect("/login");
}
next();
}
module.exports.isAuthor = async (req, res, next) => {
const { id } = req.params;
const campground = await Campground.findById(id);
if (!req.user || !campground.author.equals(req.user._id)) {
req.flash("error", "YOU ARE NOT ALLOWED TO DO THAT! (請勿越權操作)");
return res.redirect(`/campgrounds/${id}`);
};
next();
}
module.exports.validateReview = (req, res, next) => {
const { error } = reviewSchema.validate(req.body);
if (error) {
const msg = error.details.map(el => el.message).join(",");
throw new ExpressError(msg, 400)
} else {
next()
}
};
module.exports.isReviewAuthor = async (req, res, next) => {
const { id, reviewId } = req.params;
const review = await Review.findById(reviewId);
if (!req.user || !review.author.equals(req.user._id)) {
req.flash("error", "YOU ARE NOT ALLOWED TO DO THAT! (請勿越權操作)");
return res.redirect(`/campgrounds/${id}`);
};
next();
}
module.exports.validateReviewRating = (req, res, next) => {
const { id } = req.params
if (req.body.review.rating < 1) {
req.flash("alert", "rating must grater than 0");
return res.redirect(`/campgrounds/${id}`)
}
next()
}
//make a Joi campgroundSchema-and-catch-error middleware
module.exports.validateCampground = (req, res, next) => {
//destructure error from campgroundSchema(req.body)
const { error } = campgroundSchema.validate(req.body);
if (error) {
req.session.returnTo = req.originalUrl;
const msg = error.details.map(el => el.message).join(",");
req.flash("error", msg);
const redirectUrl = req.session.returnTo;
delete req.session.returnTo;
return res.redirect(redirectUrl);
} else {
next()
}
}