From a110b7137716d7e03e0b5768ab287582232dc91e Mon Sep 17 00:00:00 2001
From: Ben PC <Benn20002@gmail.com>
Date: Wed, 30 Mar 2022 14:52:20 +0200
Subject: [PATCH] Multiple Categories

---
 index.js          | 8 ++++----
 views/product.ejs | 9 ++++++++-
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/index.js b/index.js
index 42bf073..bca8b06 100644
--- a/index.js
+++ b/index.js
@@ -172,9 +172,9 @@ app.get("/product/:productId", authNoRedirectHandler, (req, res) => {
             if(err) throw err;
             let reviews = JSON.parse(JSON.stringify(result));
             console.log(product)
-            mysql_handler.con.query(`SELECT * FROM categories WHERE id='${product.categoryId}'`,function(err,result){
+            mysql_handler.con.query(`SELECT * FROM categories WHERE id IN (SELECT category_id FROM product_categories WHERE product_id = ${product.categoryId})`,function(err,result){
                 if(err) throw err;
-                let category = JSON.parse(JSON.stringify(result))[0];
+                let categories = JSON.parse(JSON.stringify(result));
 
                 let dict = {
                     title: product.productName,
@@ -184,7 +184,7 @@ app.get("/product/:productId", authNoRedirectHandler, (req, res) => {
                     productDescription: "ez",
                     loggedIn: true,
                     reviews: reviews,
-                    category: category, 
+                    categories: categories, 
                     user: req.user,                   
                 }
                 res.render('product', dict)
@@ -229,7 +229,7 @@ app.get("/search/:query/",authNoRedirectHandler,(req, res) => {
     var catQuery = "";
     var cat = req.query.cat;
     if (typeof cat !== 'undefined' && cat != 0) {
-        catQuery = " AND categoryId = "+cat;
+        catQuery = " AND (SELECT COUNT(*) FROM product_categories c WHERE c.category_id = "+cat+" AND c.product_id = p.id)";
     }
 
     var sortQuery = "";
diff --git a/views/product.ejs b/views/product.ejs
index 908db5f..2198370 100644
--- a/views/product.ejs
+++ b/views/product.ejs
@@ -22,7 +22,14 @@
                 <p class="seller">Verkäufer: <%= product.sellerName%></p><br>
 
                 <p class="product-detail"><b>Preis:</b> <%= product.price.toFixed(2) %> € / Stück</h2>
-                <p class="product-detail"><b>Kategorie:</b> <%= category.name %></h2>
+                <p class="product-detail"><b>Kategorien:</b>
+                    <% for (var i=0; i < categories.length; i++) {
+                        %><%=categories[i]["name"] %><%
+                        if (i != (categories.length - 1)) {
+                            %>, <% 
+                        }
+                    } %>
+                </h2> 
                 <div>
                     <% if(product.quantity > 0){%>
                         <p style="margin-right: 30px; margin-left: 0px;color: green;">