psa-orderform/product.php

<?php
require_once __DIR__ . '/config.php';
require_once __DIR__ . '/includes/functions.php';

$productId = isset($_GET['id']) ? (int) $_GET['id'] : 0;
$product = getProductById($productId);

if ($product === null) {
    header('Location: index.php');
    exit;
}

$pageTitle = $product['name'];
$sizes = getProductSizes($product);

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['add_to_cart'])) {
    $size = trim((string) ($_POST['size'] ?? ''));

    if (!empty($sizes) && ($size === '' || !in_array($size, $sizes, true))) {
        $error = 'Bitte wählen Sie eine Größe aus.';
    } else {
        $result = addCartItem($product['id'], $size);
        if (!$result['success']) {
            $error = 'Der Artikel konnte nicht in den Warenkorb gelegt werden.';
        } elseif ($result['status'] === 'replaced') {
            setFlashMessage('cart_notice', 'success', 'Die Größe für diesen Artikel wurde im Warenkorb aktualisiert.');
            header('Location: cart.php');
            exit;
        } elseif ($result['status'] === 'unchanged') {
            setFlashMessage('cart_notice', 'info', 'Dieser Artikel ist bereits mit der gewählten Größe im Warenkorb.');
            header('Location: cart.php');
            exit;
        } else {
            setFlashMessage('cart_notice', 'success', 'Der Artikel wurde zum Warenkorb hinzugefügt.');
            header('Location: cart.php');
            exit;
        }
    }
}

include __DIR__ . '/includes/header.php';
?>

<?php if (isset($error)): ?>
    <div class="alert alert-error">
        <?php echo escape($error); ?>
    </div>
<?php endif; ?>

<div class="product-detail-grid">
    <div>
        <?php if (!empty($product['image']) && file_exists(__DIR__ . '/assets/images/' . $product['image'])): ?>
            <img class="product-image" src="<?php echo escape(SITE_URL); ?>/assets/images/<?php echo escape($product['image']); ?>" alt="<?php echo escape($product['name']); ?>">
        <?php else: ?>
            <div class="product-placeholder">Kein Bild verfügbar</div>
        <?php endif; ?>
    </div>

    <div class="product-copy">
        <h1><?php echo escape($product['name']); ?></h1>

        <div class="product-description-block">
            <h3>Beschreibung</h3>
            <p class="product-description"><?php echo nl2br(escape($product['description'])); ?></p>
        </div>

        <form method="POST" class="product-form">
            <?php if (!empty($sizes)): ?>
                <div class="form-group">
                    <label for="size">Größe *</label>
                    <select id="size" name="size" required onchange="updateAvailabilityNotice()">
                        <option value="">Bitte wählen</option>
                        <?php foreach ($sizes as $sizeOption): ?>
                            <?php $label = getAvailabilityLabel($product, $sizeOption); ?>
                            <option value="<?php echo escape($sizeOption); ?>" data-label="<?php echo escape($label); ?>">
                                <?php echo escape($sizeOption); ?>
                            </option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div id="availabilityNotice" class="alert alert-warning is-hidden"></div>
            <?php endif; ?>

            <button type="submit" name="add_to_cart" class="btn btn-block">In den Warenkorb</button>
        </form>

        <?php if (!empty($sizes)): ?>
            <script>
                function updateAvailabilityNotice() {
                    const sizeSelect = document.getElementById('size');
                    const notice = document.getElementById('availabilityNotice');
                    const selectedOption = sizeSelect.options[sizeSelect.selectedIndex];
                    const text = selectedOption ? selectedOption.getAttribute('data-label') : '';

                    if (text) {
                        notice.textContent = text;
                        notice.classList.remove('is-hidden');
                    } else {
                        notice.textContent = '';
                        notice.classList.add('is-hidden');
                    }
                }
            </script>
        <?php endif; ?>

        <div class="mt-4">
            <a href="index.php" class="btn btn-secondary">Zurück zur Übersicht</a>
        </div>
    </div>
</div>

<?php include __DIR__ . '/includes/footer.php'; ?>