feuerwehr-vereinsshop/cart.php

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

$pageTitle = 'Warenkorb';

// Handle cart updates
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (isset($_POST['update_cart'])) {
        $quantities = $_POST['quantities'] ?? [];
        $newCart = [];

        foreach ($_SESSION['cart'] as $index => $item) {
            $newQty = isset($quantities[$index]) ? (int)$quantities[$index] : $item['quantity'];

            if ($newQty > 0) {
                $newItem = [
                    'product_id' => $item['product_id'],
                    'quantity' => $newQty
                ];
                if (isset($item['size']) && $item['size'] !== '') {
                    $newItem['size'] = $item['size'];
                }
                $newCart[] = $newItem;
            }
            // If newQty <= 0, item is removed from cart
        }

        $_SESSION['cart'] = $newCart;
    } elseif (isset($_POST['remove_item'])) {
        $productId = (int)$_POST['product_id'];
        $size = isset($_POST['size']) ? sanitize($_POST['size']) : null;
        
        $_SESSION['cart'] = array_filter($_SESSION['cart'], function($item) use ($productId, $size) {
            if ($item['product_id'] != $productId) {
                return true;
            }
            // If size is specified, only remove items with matching size
            if ($size !== null) {
                return !(isset($item['size']) && $item['size'] === $size);
            }
            // If no size specified, remove all items of this product
            return false;
        });
        $_SESSION['cart'] = array_values($_SESSION['cart']); // Re-index
    }
}

$cart = $_SESSION['cart'] ?? [];
$cartItems = [];
$total = 0;

foreach ($cart as $index => $item) {
    $product = getProductById($item['product_id']);
    if ($product) {
        $itemTotal = $product['price'] * $item['quantity'];
        $total += $itemTotal;
        $cartItems[] = [
            'product' => $product,
            'quantity' => $item['quantity'],
            'total' => $itemTotal,
            'size' => isset($item['size']) ? $item['size'] : null,
            'cart_index' => $index
        ];
    }
}

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

<h2>Warenkorb</h2>

<?php if (empty($cartItems)): ?>
    <div class="alert alert-info">
        <p>Ihr Warenkorb ist leer.</p>
        <a href="index.php" class="btn">Weiter einkaufen</a>
    </div>
<?php else: ?>
    <form method="POST">
        <?php foreach ($cartItems as $cartItem): ?>
            <div class="cart-item">
                <div class="cart-item-info">
                    <h3><?php echo htmlspecialchars($cartItem['product']['name']); ?></h3>
                    <?php if (isset($cartItem['size']) && !empty($cartItem['size'])): ?>
                        <p><strong>Größe:</strong> <?php echo htmlspecialchars($cartItem['size']); ?></p>
                    <?php endif; ?>
                    <p>Einzelpreis: <?php echo formatPrice($cartItem['product']['price']); ?></p>
                    <p>Gesamt: <?php echo formatPrice($cartItem['total']); ?></p>
                    <?php 
                    $itemStock = getStock($cartItem['product'], isset($cartItem['size']) ? $cartItem['size'] : null);
                    $hasEnoughStock = $itemStock >= $cartItem['quantity'];
                    ?>
                    <p class="stock <?php echo $hasEnoughStock ? 'in-stock' : 'out-of-stock'; ?>">
                        Lagerbestand: <?php echo $itemStock; ?> Stück
                        <?php if (!$hasEnoughStock): ?>
                            <br><strong style="color: #dc3545;">Nicht genügend Lagerbestand!</strong>
                        <?php endif; ?>
                    </p>
                </div>
                <div class="cart-item-actions">
                    <label>
                        Menge:
                        <input type="number" name="quantities[<?php echo $cartItem['cart_index']; ?>]" 
                               value="<?php echo $cartItem['quantity']; ?>" 
                               min="0" 
                               max="<?php echo $itemStock; ?>"
                               class="quantity-input">
                    </label>
                    <form method="POST" style="display: inline;">
                        <input type="hidden" name="product_id" value="<?php echo $cartItem['product']['id']; ?>">
                        <?php if (isset($cartItem['size']) && !empty($cartItem['size'])): ?>
                            <input type="hidden" name="size" value="<?php echo htmlspecialchars($cartItem['size']); ?>">
                        <?php endif; ?>
                        <button type="submit" name="remove_item" value="1" class="btn btn-secondary btn-small">Entfernen</button>
                    </form>
                </div>
            </div>
        <?php endforeach; ?>
        
        <div style="text-align: right; margin: 2rem 0;">
            <div style="font-size: 1.5rem; font-weight: bold; margin-bottom: 1rem;">
                Gesamtsumme: <?php echo formatPrice($total); ?>
            </div>
            <button type="submit" name="update_cart" class="btn btn-secondary">Warenkorb aktualisieren</button>
            <a href="checkout.php" class="btn" style="margin-left: 1rem;">Zur Reservierung</a>
        </div>
    </form>
<?php endif; ?>

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