content/search-results.php

@@ -27,7 +27,8 @@ if ($currentPage < 1) {
 $offset = ($currentPage - 1) * $limit;
 
 // Nur die Ergebnisse für die aktuelle Seite ausschneiden
-$results = array_slice($all_results, $offset, $limit);
+//$results = array_slice($all_results, $offset, $limit);
+$results = $all_results;
 $resultCount = count($results);
 
 ?>
@@ -44,12 +45,11 @@ $resultCount = count($results);
     <!-- Links: Seitenleiste für Filter und Suche -->
     <aside class="s-res-sidebar">
 
-        <!-- Sortierfuntion Box und Such Box-->
-         <form id="search-form-id" action="php/controller/search-results-controller.php" method="GET" class="s-res-sidebar-form">
-             <!-- Dieses Feld hält die aktuelle Seitenzahl für den Submit bereit -->
-             <input type="hidden" name="page" id="s-res-page-input" value="<?php echo $currentPage; ?>">
+        <form action="php/controller/search-results-controller.php" method="GET" id="search-form-id" class="s-res-sidebar-form">
             
-             <div class="s-res-sidebar-box">
+            <input type="hidden" id="s-res-page-input" name="page" value="<?php echo $_GET['page'] ?? 1; ?>">
+
+            <div class="s-res-sidebar-box">
                 <h3 class="s-res-sidebar-title">Suche anpassen</h3>
                 <input type="search" id="site-search" name="q" placeholder="Suchen..." class="nav__search" value="<?php echo htmlspecialchars($query); ?>" maxlength="50" required>
                 <button type="submit" class="nav__search-button">Suchen</button>
@@ -60,25 +60,57 @@ $resultCount = count($results);
                 <?php $currentSort = $_SESSION['search_sort'] ?? 'alphabet'; ?>
                 <div class="s-res-filter-group">
                     <label class="s-res-filter-option">
-                        <input type="radio" name="sort" value="alphabet" <?php echo $currentSort === 'alphabet' ? 'checked' : ''; ?> onchange="this.form.submit()">
+                        <input type="radio" name="sort" value="alphabet" class="sort-radio" <?php echo $currentSort === 'alphabet' ? 'checked' : ''; ?>>
                         <span>Alphabetisch</span>
                     </label>
-                    <!-- Noch disabled, da likes noch nicht implementiert-->
                     <label class="s-res-filter-option">
-                        <input type="radio" name="sort" value="likes" <?php echo $currentSort === 'likes' ? 'checked' : ''; ?> onchange="this.form.submit()">
+                        <input type="radio" name="sort" value="likes" class="sort-radio" <?php echo $currentSort === 'likes' ? 'checked' : ''; ?>>
                         <span>Beliebtheit (Likes)</span>
                     </label>
                     <label class="s-res-filter-option">
-                        <input type="radio" name="sort" value="newest" <?php echo $currentSort === 'newest' ? 'checked' : ''; ?> onchange="this.form.submit()">
+                        <input type="radio" name="sort" value="newest" class="sort-radio" <?php echo $currentSort === 'newest' ? 'checked' : ''; ?>>
                         <span>Neueste Beiträge</span>
                     </label>
                     <label class="s-res-filter-option">
-                        <input type="radio" name="sort" value="oldest" <?php echo $currentSort === 'oldest' ? 'checked' : ''; ?> onchange="this.form.submit()">
+                        <input type="radio" name="sort" value="oldest" class="sort-radio" <?php echo $currentSort === 'oldest' ? 'checked' : ''; ?>>
                         <span>Älteste Beiträge</span>
                     </label>
                 </div>
             </div>
 
+            <div class="s-res-sidebar-box">
+                <h3 class="s-res-sidebar-title">Kategorie filtern</h3>
+                <select id="category-filter" class="s-res-limit-select" style="width: 100%; padding: 8px; border-radius: 6px; border: 1px solid #cbd5e1;">
+                    <option value="all">Alle Kategorien</option>
+                    <option value="Deutsch">Deutsch</option>
+                    <option value="Englisch">Englisch</option>
+                    <option value="Franzoesisch">Französisch</option>
+                    <option value="Latein">Latein</option>
+                    <option value="Literatur">Literatur</option>
+                    <option value="Mathematik">Mathematik</option>
+                    <option value="Biologie">Biologie</option>
+                    <option value="Informatik">Informatik</option>
+                    <option value="Chemie">Chemie</option>
+                    <option value="Physik">Physik</option>
+                    <option value="Astronomie">Astronomie</option>
+                    <option value="Geschichte">Geschichte</option>
+                    <option value="Erdkunde">Erdkunde</option>
+                    <option value="Sozialkunde">Sozialkunde</option>
+                    <option value="Wirtschaftskunde">Wirtschaftskunde</option>
+                    <option value="Religion">Religion</option>
+                    <option value="Ethikunterricht">Ethikunterricht</option>
+                    <option value="Philosophie">Philosophie</option>
+                    <option value="Psychologie">Psychologie</option>
+                    <option value="Kunst">Kunst</option>
+                    <option value="Musik">Musik</option>
+                    <option value="Theater">Theater</option>
+                    <option value="Technik">Technik</option>
+                    <option value="Werken">Werken</option>
+                    <option value="Hauswirtschaft">Hauswirtschaft</option>
+                    <option value="Sport">Sport</option>
+                </select>
+            </div>
+
         </form>
 
     </aside>
@@ -95,8 +127,11 @@ $resultCount = count($results);
             <?php 
             if (!empty($results)): ?>
     
-                <?php foreach ($results as $item): ?>
-                    <div class="s-res-item">
+                <?php foreach ($results as $item): 
+                    // Anzahl der Likes ermitteln (falls es ein Array ist, zählen; falls Zahl, direkt nutzen)
+                    $likesCount = isset($item['likes']) && is_array($item['likes']) ? count($item['likes']) : ($item['likes'] ?? 0);
+                ?>
+                    <div class="s-res-item" data-likes="<?php echo $likesCount; ?>" data-category="<?php echo strtolower($item['category'] ?? ''); ?>">
                         <div class="s-res-content">
                             <h2 class="s-res-item-title">
                                 <a href="index.php?pfad=showArticle&id=<?php echo $item['id']; ?>" class="s-res-link">
@@ -107,10 +142,9 @@ $resultCount = count($results);
                                 <p class="s-res-author">Von: <span class="s-res-author-name"><?php echo htmlspecialchars($item['author']); ?></span></p>
 
                                 <span class="s-res-likes">
-                                    ❤️ <?php echo isset($item['likes']) && is_array($item['likes']) ? count($item['likes']) : 0; ?>
+                                    ❤️ <?php echo $likesCount; ?>
                                 </span>
                             </div>
-
                         </div>
                         <div class="s-res-arrow">&rarr;</div>
                     </div>
@@ -120,8 +154,8 @@ $resultCount = count($results);
             elseif (isset($_SESSION["search_query"]) && $_SESSION["search_query"] !== "" && $resultCount === 0): ?>
                 <p>Keine Beiträge zu diesem Suchbegriff gefunden.</p>  
             <?php 
-            elseif (isset($_SESSION["message"]) && $_SESSION["message"] == "missing_parameters"): ?>
-                <p>Bitte überprüfe deine Sucheingabe und versuche es erneut!</p>
+            elseif (isset($_SESSION["message"]) && $_SESSION["message"] == "invalid_search_query"): ?>
+                <p>Unzulässige Suchanfrage</p>
                 
             <?php endif; ?>
             <?php
@@ -143,20 +177,11 @@ $resultCount = count($results);
             </div>
 
             <div class="s-res-page-navigation">
-                <button type="button" class="s-res-page-btn" data-page="<?php echo $currentPage - 1; ?>" <?php echo $currentPage <= 1 ? 'disabled' : ''; ?>>
-                    «
-                </button>
-                <!-- Dynamische Seitenzahlen -->
-                <?php for ($i = 1; $i <= $totalPages; $i++): ?>
-                    <button type="button"
-                            class="s-res-page-btn <?php echo $i === $currentPage ? 's-res-page-btn-active' : ''; ?>"
-                            data-page="<?php echo $i; ?>">
-                        <?php echo $i; ?>
-                    </button>
-                <?php endfor; ?>
-                <button type="button" class="s-res-page-btn" data-page="<?php echo $currentPage + 1; ?>" <?php echo $currentPage >= $totalPages ? 'disabled' : ''; ?>>
-                    »
-                </button>
+                <button type="button" class="s-res-page-btn" id="prev-page-btn" data-page="0">«</button>
+                
+                <span id="dynamic-page-numbers"></span>
+                
+                <button type="button" class="s-res-page-btn" id="next-page-btn" data-page="2">»</button>
             </div>
 
         </div>

index.php

@@ -53,8 +53,10 @@ if ($pfad === "deleteAccount") {
         <link rel="stylesheet" href="css/message.css">
 
         <script src="js/paginator.js" async></script>
+        <script src="js/sorter.js" async></script>
         <script src="js/comments.js" defer></script>
         <script src="js/editor.js" async></script>
+        <script src="js/filter.js" async></script>
 
         <title>EduForge</title>
     </head>

js/filter.js

@@ -0,0 +1,101 @@
+let currentClientPage = 1;
+const itemsPerPage = 10;
+
+function initFilter() {
+    const filterSelect = document.getElementById('category-filter');
+    const listContainer = document.querySelector('.s-res-list');
+
+    if (!filterSelect || !listContainer) return;
+
+    updateVisibility();
+
+    filterSelect.addEventListener('change', function() {
+        currentClientPage = 1; 
+        updateVisibility();
+    });
+
+    const navigationContainer = document.querySelector('.s-res-page-navigation');
+    if (navigationContainer) {
+        navigationContainer.addEventListener('click', function(e) {
+            const button = e.target.closest('.s-res-page-btn');
+            if (!button || button.disabled) return;
+
+            e.preventDefault();
+            
+            const targetPage = button.getAttribute('data-page');
+            if (targetPage) {
+                currentClientPage = parseInt(targetPage, 10);
+                updateVisibility();
+            }
+        });
+    }
+}
+
+function updateVisibility() {
+    const filterSelect = document.getElementById('category-filter');
+    const listContainer = document.querySelector('.s-res-list');
+    const selectedCategory = filterSelect.value.toLowerCase().trim();
+    const cards = listContainer.querySelectorAll('.s-res-item');
+
+    let visibleCards = [];
+    cards.forEach(card => {
+        const cardCategory = (card.getAttribute('data-category') || '').toLowerCase().trim();
+        if (selectedCategory === 'all' || cardCategory.includes(selectedCategory) || selectedCategory.includes(cardCategory)) {
+            visibleCards.push(card);
+        } else {
+            card.style.display = 'none';
+        }
+    });
+
+    const totalVisible = visibleCards.length;
+    const totalPages = Math.max(1, Math.ceil(totalVisible / itemsPerPage));
+    
+    if (currentClientPage < 1) currentClientPage = 1;
+    if (currentClientPage > totalPages) currentClientPage = totalPages;
+
+    const startOffset = (currentClientPage - 1) * itemsPerPage;
+    const endOffset = startOffset + itemsPerPage;
+
+    visibleCards.forEach((card, index) => {
+        if (index >= startOffset && index < endOffset) {
+            card.style.display = 'flex';
+        } else {
+            card.style.display = 'none';
+        }
+    });
+
+    updatePaginatorUI(currentClientPage, totalPages);
+}
+
+function updatePaginatorUI(currentPage, totalPages) {
+    const prevBtn = document.getElementById('prev-page-btn');
+    const nextBtn = document.getElementById('next-page-btn');
+    const numbersContainer = document.getElementById('dynamic-page-numbers');
+
+    if (!prevBtn || !nextBtn || !numbersContainer) return;
+
+    prevBtn.setAttribute('data-page', currentPage - 1);
+    prevBtn.disabled = (currentPage <= 1);
+
+    nextBtn.setAttribute('data-page', currentPage + 1);
+    nextBtn.disabled = (currentPage >= totalPages);
+
+    let buttonsHTML = '';
+    for (let i = 1; i <= totalPages; i++) {
+        const activeClass = (i === currentPage) ? 's-res-page-btn-active' : '';
+        buttonsHTML += `<button type="button" class="s-res-page-btn ${activeClass}" data-page="${i}">${i}</button> `;
+    }
+    numbersContainer.innerHTML = buttonsHTML;
+}
+
+// Hilfsfunktion für Math.ceil in JS
+function ceil(val) { return Math.ceil(val); }
+
+// ist das DOM bereits vollständig aufgebaut?
+if (document.readyState === 'loading') {
+    // Falls noch geladen wird, auf das Event warten
+    document.addEventListener('DOMContentLoaded', initFilter);
+} else {
+    // Falls das HTML bereits komplett da ist, sofort ausführen
+    initFilter();
+}

js/sorter.js

@@ -0,0 +1,50 @@
+
+function initSorter() {
+    const listContainer = document.querySelector('.s-res-list');
+    const sortRadios = document.querySelectorAll('.sort-radio');
+
+    // wenn keine liste vorhanden, abbrechen
+    if (!listContainer || sortRadios.length === 0) return;
+
+    sortRadios.forEach(radio => {
+        radio.addEventListener('change', function() {
+            const cards = Array.from(listContainer.querySelectorAll('.s-res-item'));
+            const sortValue = this.value;
+
+            cards.sort((a, b) => {
+                if (sortValue === 'likes') {
+                    const likesA = parseInt(a.getAttribute('data-likes') || '0', 10);
+                    const likesB = parseInt(b.getAttribute('data-likes') || '0', 10);
+                    return likesB - likesA; 
+                }
+                else if (sortValue === 'alphabet') {
+                    // alphabetische sortierung
+                    const titleA = a.querySelector('.s-res-link').textContent.trim().toLowerCase();
+                    const titleB = b.querySelector('.s-res-link').textContent.trim().toLowerCase();
+                    return titleA.localeCompare(titleB);
+                } 
+                else if (sortValue === 'newest' || sortValue === 'oldest') {
+                    // hoehere ID wird als neuer gesehen
+                    const urlA = a.querySelector('.s-res-link').getAttribute('href');
+                    const urlB = b.querySelector('.s-res-link').getAttribute('href');
+                    
+                    const idA = parseInt(urlA.match(/id=(\d+)/)[1], 10);
+                    const idB = parseInt(urlB.match(/id=(\d+)/)[1], 10);
+
+                    return sortValue === 'newest' ? idB - idA : idA - idB;
+                }
+                return 0;
+            });
+
+            listContainer.innerHTML = '';
+            cards.forEach(card => listContainer.appendChild(card));
+        });
+    });
+}
+
+// ist das DOM bereits vollständig aufgebaut?
+if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', initSorter);
+} else {
+    initSorter();
+}

php/controller/search-results-controller.php

@@ -5,14 +5,15 @@ if (session_status() === PHP_SESSION_NONE) {
 require_once '../model/LocalArticleManager.php';
 require_once '../model/ArticleManager.php';
 require_once '../model/Article.php';
+require_once '../validator/search-validator.php';
 
 if ($_SERVER["REQUEST_METHOD"] === "GET" && isset($_GET["q"])) {
 
     $search = trim($_GET["q"]);
-    if (empty($search)) {
+    if (!searchQueryValidator($search)) {
         $_SESSION["search_results"] = [];
         $_SESSION["search_query"] = "";
-        $_SESSION["message"] = "missing_parameters";
+        $_SESSION["message"] = "invalid_search_query";
     } else {
         try {
             
@@ -70,6 +71,9 @@ if ($_SERVER["REQUEST_METHOD"] === "GET" && isset($_GET["q"])) {
 
     $sort  = $_GET['sort'] ?? 'alphabet';
     $limit = isset($_GET['limit']) ? (int)$_GET['limit'] : 10;
+    if (!searchLimitValidator($limit)) {
+        $limit = 10;
+    }
     $page  = isset($_GET['page']) ? (int)$_GET['page'] : 1;
     header("Location: ../../index.php?pfad=search-results&q=" . urlencode($search) . "&sort=" . urlencode($sort) . "&limit=" . $limit . "&page=" . $page);
     exit();

php/validator/search-validator.php

@@ -0,0 +1,40 @@
+<?php
+
+/**
+ * Prüft, ob eine Suchanfrage gültig ist.
+ *
+ * Erlaubt werden Buchstaben, Zahlen, Umlaute, typische Satzzeichen und Leerzeichen.
+ * Die Länge muss zwischen 1 und 50 Zeichen liegen.
+ *
+ * @param string $query Zu prüfender Suchbegriff
+ *
+ * @return bool true wenn die Suche gültig ist, sonst false
+ */
+function searchQueryValidator($query)
+{
+    $query = trim($query);
+    
+    // Mindestens 1 Zeichen, maximal 50 Zeichen
+    $length = mb_strlen($query);
+    if ($length < 1 || $length > 50) {
+        return false;
+    }
+
+    // Erlaubt Buchstaben (inkl. Umlaut/ß), Zahlen, Leerzeichen sowie ?, !, ., -, _
+    $searchPattern = '/^[a-zA-Z0-9äöüÄÖÜß\s?!.,\-_]+$/u';
+
+    return preg_match($searchPattern, $query) === 1;
+}
+
+/**
+ * Prüft, ob das gewählte Treffer-Limit erlaubt ist.
+ *
+ * @param int|string $limit Das zu prüfende Limit
+ *
+ * @return bool true wenn das Limit 10, 20, 50 oder 100 ist, sonst false
+ */
+function searchLimitValidator($limit)
+{
+    $allowedLimits = [10, 20, 50, 100];
+    return in_array((int)$limit, $allowedLimits, true);
+}