Kategorien nicht statisch sondern dynamisch

php/controller/showCategory-controller.php

@@ -0,0 +1,20 @@
+<?php
+require_once '../model/LocalArticleManager.php';
+require_once '../model/ArticleManager.php';
+
+if (isset($_GET["category"]) && !empty($_GET["category"]) && articleCategoryValidator($_GET["category"])){
+    $category = $_GET["category"];
+    try {
+        $articleManager = ArticleManager::getInstance();
+        $articles = $articleManager->getArticlesByCategory($category);
+    } catch (Exception $e) {
+        $_SESSION["message"] = "internal_error";
+        header("location: ../../index.php");
+        exit();
+    }
+}else{
+    $_SESSION["message"] = "invalid_category";
+    header("location: ../../index.php");
+    exit();
+}
+?>

php/model/ArticleManager.php

@@ -44,5 +44,26 @@ class ArticleManager extends LocalArticleManager
 
         return $articleManager;
     }
+
+    public function getArticlesByCategory($category)
+    {
+        $articles = $this->getAllArticles();
+        $filteredArticles = [];
+
+        foreach ($articles as $article) {
+            if (isset($article['category']) && $article['category'] == $category) {
+                $filteredArticles[] = new Article(
+                    intval($article['id']),
+                    $article['title'],
+                    $article['content'],
+                    $article['author'],
+                    $article['category'],
+                    $article['tags'],
+                    $article['creationDate']
+                );
+            }
+        }
+        return $filteredArticles;
+    }
  
 }

php/model/ArticleManagerDAO.php

@@ -85,6 +85,13 @@ interface ArticleManagerDAO
      */
     public function search(string $keyword): array;
 
+    /**
+     * Gibt alle Beiträge einer gegebenen Kategorie aus.
+     * @param $category
+     * @return mixed
+     */
+    public function getArticlesByCategory($category);
+
 
 }
 ?>