[TASK] Listen to ProcessOrderCheckStock event

Relates: #138

Classes/Domain/DoctrineRepository/Product/BeVariantRepository.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Extcode\CartProducts\Domain\DoctrineRepository\Product;
+
+/*
+ * This file is part of the package extcode/cart-products.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE file that was distributed with this source code.
+ */
+
+use TYPO3\CMS\Core\Database\ConnectionPool;
+
+class BeVariantRepository
+{
+    public function __construct(
+        private readonly ConnectionPool $connectionPool
+    ) {}
+
+    public function getStock(int $uid): int
+    {
+        $productConnection = $this->connectionPool->getConnectionForTable('tx_cartproducts_domain_model_product_bevariant');
+
+        $productQueryBuilder = $productConnection->createQueryBuilder();
+
+        return $productQueryBuilder
+            ->select('stock')
+            ->from('tx_cartproducts_domain_model_product_bevariant')
+            ->where(
+                $productQueryBuilder->expr()->eq('uid', $productQueryBuilder->createNamedParameter($uid, \PDO::PARAM_INT))
+            )->executeQuery()->fetchOne();
+    }
+}

Classes/Domain/DoctrineRepository/Product/ProductRepository.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Extcode\CartProducts\Domain\DoctrineRepository\Product;
+
+/*
+ * This file is part of the package extcode/cart-products.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE file that was distributed with this source code.
+ */
+
+use TYPO3\CMS\Core\Database\ConnectionPool;
+
+class ProductRepository
+{
+    public function __construct(
+        private readonly ConnectionPool $connectionPool
+    ) {}
+
+    public function getStock(int $uid): int
+    {
+        $productConnection = $this->connectionPool->getConnectionForTable('tx_cartproducts_domain_model_product_product');
+
+        $productQueryBuilder = $productConnection->createQueryBuilder();
+
+        return $productQueryBuilder
+            ->select('stock')
+            ->from('tx_cartproducts_domain_model_product_product')
+            ->where(
+                $productQueryBuilder->expr()->eq('uid', $productQueryBuilder->createNamedParameter($uid, \PDO::PARAM_INT))
+            )->executeQuery()->fetchOne();
+    }
+}

Classes/EventListener/Order/Stock/CheckStock.php

@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Extcode\CartProducts\EventListener\Order\Stock;
+
+/*
+ * This file is part of the package extcode/cart-products.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE file that was distributed with this source code.
+ */
+
+use Extcode\Cart\Domain\Model\Cart\BeVariant as CartProductBeVariant;
+use Extcode\Cart\Domain\Model\Cart\Product as CartProduct;
+use Extcode\Cart\Event\ProcessOrderCheckStockEvent;
+use Extcode\CartProducts\Domain\DoctrineRepository\Product\BeVariantRepository;
+use Extcode\CartProducts\Domain\DoctrineRepository\Product\ProductRepository;
+use TYPO3\CMS\Core\Messaging\FlashMessage;
+use TYPO3\CMS\Core\Type\ContextualFeedbackSeverity;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use TYPO3\CMS\Extbase\Utility\LocalizationUtility;
+
+class CheckStock
+{
+    private ProcessOrderCheckStockEvent $event;
+
+    public function __construct(
+        private readonly ProductRepository $productRepository,
+        private readonly BeVariantRepository $beVariantRepository,
+    ) {}
+
+    public function __invoke(ProcessOrderCheckStockEvent $event): void
+    {
+        $this->event = $event;
+        $cart = $event->getCart();
+        $cartProducts = $cart->getProducts();
+
+        foreach ($cartProducts as $cartProduct) {
+            if ($cartProduct->getProductType() !== 'CartProducts' || $cartProduct->isHandleStock() === false) {
+                continue;
+            }
+
+            if ($cartProduct->isHandleStockInVariants()) {
+                foreach ($cartProduct->getBeVariants() as $cartProductBeVariant) {
+                    $this->checkStockForBackendVariant($cartProductBeVariant, $cartProduct);
+                }
+            } else {
+                $this->checkStockForProduct($cartProduct);
+            }
+        }
+    }
+
+    private function checkStockForProduct(CartProduct $cartProduct): void
+    {
+        $quantityInStock = $this->productRepository->getStock($cartProduct->getProductId());
+
+        if ($quantityInStock < $cartProduct->getQuantity()) {
+            $this->falseAvailability($this->event, $cartProduct->getTitle(), $cartProduct->getSku(), $quantityInStock);
+        }
+    }
+
+    public function checkStockForBackendVariant(CartProductBeVariant $cartProductBeVariant, CartProduct $cartProduct): void
+    {
+        $quantityInStock = $this->beVariantRepository->getStock($cartProductBeVariant->getId());
+
+        if ($quantityInStock < $cartProductBeVariant->getQuantity()) {
+            $this->falseAvailability($this->event, $cartProduct->getTitle(), $cartProductBeVariant->getSku(), $quantityInStock);
+        }
+    }
+
+    private function falseAvailability(
+        ProcessOrderCheckStockEvent $event,
+        string $title,
+        string $sku,
+        int $quantityInStock
+    ): void {
+        $event->setNotEveryProductAvailable();
+        $event->addInsufficientStockMessage(
+            GeneralUtility::makeInstance(
+                FlashMessage::class,
+                LocalizationUtility::translate(
+                    'tx_cart.error.stock_handling.order',
+                    'cart',
+                    [$title, $sku, $quantityInStock]
+                ),
+                '',
+                ContextualFeedbackSeverity::ERROR
+            )
+        );
+    }
+}

Configuration/Services.yaml

@@ -66,6 +66,12 @@ services:
         identifier: 'cart-products--check-product-availability'
         event: Extcode\Cart\Event\CheckProductAvailabilityEvent
 
+  Extcode\CartProducts\EventListener\Order\Stock\CheckStock:
+    tags:
+      - name: event.listener
+        identifier: 'cart-products--order--stock-check-stock'
+        event: Extcode\Cart\Event\ProcessOrderCheckStockEvent
+
   Extcode\CartProducts\Reaction\UpdateStockReaction:
     tags: ['reactions.reaction']
     public: true