product.php

<?php

namespace App\Controller;

use App\Entity\Product;
use App\Form\ProductType;
use App\Repository\ProductRepository;
use Doctrine\ORM\EntityManagerInterface;
use Psr\Log\LoggerInterface;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\Validator\Validator\ValidatorInterface; // For manual validation

class ProductController extends AbstractController
{
    /**
     * @Route("/product/new", name="product_new", methods={"GET","POST"})
     */
    public function new(Request $request, EntityManagerInterface $entityManager, LoggerInterface $logger, ValidatorInterface $validator): Response
    {
        $product = new Product();
        $form = $this->createForm(ProductType::class, $product);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) { // Form validation

            // Manual Validation (if needed for more complex checks not covered by annotations)
            $errors = $validator->validate($product);
            if (count($errors) > 0) {
                foreach ($errors as $error) {
                    $this->addFlash('error', $error->getMessage()); // Display errors to the user
                }

                return $this->render('product/new.html.twig', [
                    'form' => $form->createView(),
                ]); // Re-render the form with error messages
            }

            try {
                $entityManager->persist($product);
                $entityManager->flush();

                $this->addFlash('success', 'Product created successfully!'); // User feedback

                return $this->redirectToRoute('product_index'); // Redirect after successful save
            } catch (\Exception $e) { // Catch database exceptions
                $logger->error(sprintf('Error saving product: %s', $e->getMessage()), ['exception' => $e, 'product' => $product]);
                $this->addFlash('error', 'An error occurred while saving the product. Please try again later.'); // User-friendly message
                return $this->render('product/new.html.twig', [
                    'form' => $form->createView(),
                ]); // Re-render the form
            }
        }

        return $this->render('product/new.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}