BDD contrainte - Legacy - CartController

UserController.php

<?php

declare(strict_types=1);

namespace App\Controller;

use App\Entity\Cart;
use App\Entity\Product;
use Doctrine\Persistence\ManagerRegistry;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\Routing\Annotation\Route;

class CartController
{
    #[Route('/carts/{id}/products', 'methods': ['POST'])]
    public function addProductToCart(
        Cart $cart,
        Request $request,
        ManagerRegistry $doctrine
    ): JsonResponse {
        $quantity = $request->request->get('quantity', 1);
        
        if ($quantity < 1) {
            $quantity = 1;
        }
        
        $productId = $request->request->get('product_id', null);
        
        $product = $doctrine->getRepository(Product::class)->find($productId);
        
        if ($quantity > $product->getQuantity()) {
            return new JsonResponse(null, 400);
        }
        
        $product->setQuantity($quantity);
        $cart->addProduct($product);
        
        $entityManager = $doctrine->getManager();
        $entityManager->flush();
        
        return new JsonResponse([], 201);
    }
}