Add attribute filter bar to product listing with dynamic selection

assets/css/catbar.css

@@ -132,3 +132,68 @@
         min-height: 36px;
     }
 }
+
+@media (min-width: 1024px) {
+    .home-nav__item a {
+        font-size: 1rem;
+        padding: 5px 24px;
+    }
+}
+
+/* ==========================================================
+   ATTRIBUTE FILTER BAR
+   ========================================================== */
+
+.attrbar {
+    width: 100%;
+    background-color: #f8f9fa;
+    border-bottom: 1px solid #ddd;
+    padding: 10px 0;
+}
+
+.attrbar__inner {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
+.attr-filter-form {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 15px;
+    align-items: center;
+    justify-content: center;
+}
+
+.attr-filter-item {
+    display: flex;
+    align-items: center;
+    gap: 5px;
+    font-size: 0.9rem;
+    color: #333;
+}
+
+.attr-filter-item select {
+    padding: 4px 8px;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    background-color: #fff;
+    cursor: pointer;
+    font-size: 0.85rem;
+}
+
+.attr-filter-reset {
+    font-size: 0.85rem;
+    color: #e63946;
+    text-decoration: none;
+    padding: 4px 8px;
+    border: 1px solid #e63946;
+    border-radius: 4px;
+    background-color: transparent;
+    transition: all 0.2s ease;
+}
+
+.attr-filter-reset:hover {
+    background-color: #e63946;
+    color: #fff;
+}

attrbar.php

@@ -0,0 +1,137 @@
+<?php
+// attrbar.php
+require_once __DIR__ . '/lib/bootstrap.php';
+$conn = db_connect();
+$currentCategory = isset($_GET['category']) ? $_GET['category'] : 'all';
+
+$catId = null;
+$categoriesConfig = [
+    'iphone'  => 20,
+    'ipad'    => 21,
+    'macbook' => 22,
+    'airpods' => 23,
+    'accessories' => 24,
+];
+
+if (isset($categoriesConfig[$currentCategory])) {
+    $catId = $categoriesConfig[$currentCategory];
+}
+
+// Fetch available attributes for the category if selected
+$attributes = [];
+if ($catId) {
+    // Only show attributes related to the products in the active category
+    $stmtAttr = $conn->prepare("
+        SELECT DISTINCT a.attributeID, a.name, a.unit
+        FROM attributes a
+        JOIN productAttributes pa ON a.attributeID = pa.attributeID
+        JOIN products p ON pa.productID = p.productID
+        WHERE p.categoryID = ?
+        ORDER BY a.name
+    ");
+    $stmtAttr->bind_param("i", $catId);
+    $stmtAttr->execute();
+    $resAttr = $stmtAttr->get_result();
+    while ($row = $resAttr->fetch_assoc()) {
+        $attributes[] = $row;
+    }
+    $stmtAttr->close();
+} else {
+    // Or all active across any product?
+    // User typically filters by category first. But if 'all', maybe just get top attributes.
+    $resAttr = $conn->query("
+        SELECT DISTINCT a.attributeID, a.name, a.unit
+        FROM attributes a
+        JOIN productAttributes pa ON a.attributeID = pa.attributeID
+        ORDER BY a.name LIMIT 5
+    ");
+    if ($resAttr) {
+        while ($row = $resAttr->fetch_assoc()) {
+            $attributes[] = $row;
+        }
+    }
+}
+?>
+
+<?php if (!empty($attributes)): ?>
+<div class="attrbar" aria-label="Attributfilter">
+    <div class="attrbar__inner container">
+        <form action="index.php" method="GET" class="attr-filter-form">
+            <?php if (isset($_GET['category'])): ?>
+                <input type="hidden" name="category" value="<?= htmlspecialchars($_GET['category']) ?>">
+            <?php endif; ?>
+            <?php if (isset($_GET['search'])): ?>
+                <input type="hidden" name="search" value="<?= htmlspecialchars($_GET['search']) ?>">
+            <?php endif; ?>
+
+            <?php foreach ($attributes as $attr): 
+                $attrId = $attr['attributeID'];
+                $attrName = $attr['name'] . ($attr['unit'] ? ' (' . $attr['unit'] . ')' : '');
+                
+                // Fetch distinct values for this attribute based on current category
+                if ($catId) {
+                    $vStmt = $conn->prepare("
+                        SELECT DISTINCT pa.valueString, pa.valueNumber, pa.valueBool
+                        FROM productAttributes pa
+                        JOIN products p ON pa.productID = p.productID
+                        WHERE p.categoryID = ? AND pa.attributeID = ?
+                        ORDER BY pa.valueString, pa.valueNumber
+                    ");
+                    $vStmt->bind_param("ii", $catId, $attrId);
+                } else {
+                    $vStmt = $conn->prepare("
+                        SELECT DISTINCT valueString, valueNumber, valueBool
+                        FROM productAttributes
+                        WHERE attributeID = ?
+                        ORDER BY valueString, valueNumber
+                    ");
+                    $vStmt->bind_param("i", $attrId);
+                }
+                $vStmt->execute();
+                $vRes = $vStmt->get_result();
+                $values = [];
+                while ($vRow = $vRes->fetch_assoc()) {
+                    if ($vRow['valueString'] !== null) $values[] = $vRow['valueString'];
+                    elseif ($vRow['valueNumber'] !== null) $values[] = $vRow['valueNumber'];
+                    elseif ($vRow['valueBool'] !== null) $values[] = $vRow['valueBool'] ? 'Ja' : 'Nein';
+                }
+                $vStmt->close();
+                
+                if (empty($values)) continue;
+                $paramName = "attr_" . $attrId;
+                $selectedValue = isset($_GET[$paramName]) ? $_GET[$paramName] : '';
+            ?>
+                <div class="attr-filter-item">
+                    <label for="attr_<?= $attrId ?>"><?= htmlspecialchars($attrName) ?>:</label>
+                    <select name="<?= $paramName ?>" id="attr_<?= $attrId ?>" onchange="this.form.submit()">
+                        <option value="">Alle</option>
+                        <?php foreach ($values as $val): ?>
+                            <option value="<?= htmlspecialchars($val) ?>" <?= (string)$val === (string)$selectedValue ? 'selected' : '' ?>>
+                                <?= htmlspecialchars($val) ?>
+                            </option>
+                        <?php endforeach; ?>
+                    </select>
+                </div>
+            <?php endforeach; ?>
+            
+            <noscript>
+                <button type="submit">Filtern</button>
+            </noscript>
+            <?php 
+            // Show reset button only if at least one attr filter is active
+            $hasActiveFilter = false;
+            foreach ($_GET as $k => $v) {
+                if (strpos($k, 'attr_') === 0 && $v !== '') {
+                    $hasActiveFilter = true;
+                    break;
+                }
+            }
+            if ($hasActiveFilter): ?>
+                <a href="index.php<?= isset($_GET['category']) ? '?category='.urlencode($_GET['category']) : '' ?>" class="attr-filter-reset">Filter zurücksetzen</a>
+            <?php endif; ?>
+        </form>
+    </div>
+</div>
+<?php endif; ?>
+
+

compcards.php

@@ -92,15 +92,39 @@ $categories = [
     <?php if ($activeCategory === 'all' || $activeCategory === $key): ?>
 
         <?php
-        $stmt = $conn->prepare("
+        $baseQuery = "SELECT DISTINCT p.productID, p.model, p.description, p.imagePath FROM products p ";
-            SELECT productID, model, description, imagePath
+        $whereClauses = ["p.categoryID = ?"];
-            FROM products
+        $params = [$cat['id']];
-            WHERE categoryID = ?
+        $types = "i";
-        ");
+        
+        // Find attribute filters from $_GET
+        $attrIndex = 0;
+        foreach ($_GET as $k => $v) {
+            if ($v !== '' && strpos($k, 'attr_') === 0) {
+                $attrId = (int)substr($k, 5);
+                $attrAlias = "pa" . $attrIndex;
+                $baseQuery .= " JOIN productAttributes $attrAlias ON p.productID = $attrAlias.productID ";
+                
+                // Assume string or number comparison. For simplicity, check string or number.
+                // In DB, valueString, valueNumber, valueBool can be checked.
+                $whereClauses[] = "($attrAlias.attributeID = ? AND ($attrAlias.valueString = ? OR $attrAlias.valueNumber = ? OR ($attrAlias.valueBool = 1 AND ? = 'Ja') OR ($attrAlias.valueBool = 0 AND ? = 'Nein')))";
 
-        $stmt->bind_param("i", $cat['id']); // i = integer
+                $params[] = $attrId;
+                $params[] = $v;
+                $params[] = is_numeric($v) ? (float)$v : 0;
+                $params[] = $v;
+                $params[] = $v;
+                $types .= "isdss";
+                
+                $attrIndex++;
+            }
+        }
+        
+        $sql = $baseQuery . " WHERE " . implode(" AND ", $whereClauses);
+        
+        $stmt = $conn->prepare($sql);
+        $stmt->bind_param($types, ...$params);
         $stmt->execute();
-
         $result = $stmt->get_result();
         ?>