<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Bridge\Doctrine\Messenger;

use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\Messenger\Envelope;
use Symfony\Component\Messenger\Exception\HandlerFailedException;
use Symfony\Component\Messenger\Middleware\StackInterface;
use Symfony\Component\Messenger\Stamp\HandledStamp;

/**
 * Wraps all handlers in a single doctrine transaction.
 *
 * @author Tobias Nyholm <tobias.nyholm@gmail.com>
 */
class DoctrineTransactionMiddleware extends AbstractDoctrineMiddleware
{
    protected function handleForManager(EntityManagerInterface $entityManager, Envelope $envelope, StackInterface $stack): Envelope
    {
        $entityManager->getConnection()->beginTransaction();

        $success = false;
        try {
            $envelope = $stack->next()->handle($envelope, $stack);
            $entityManager->flush();
            $entityManager->getConnection()->commit();

            $success = true;

            return $envelope;
        } catch (\Throwable $exception) {
            if ($exception instanceof HandlerFailedException) {
                // Remove all HandledStamp from the envelope so the retry will execute all handlers again.
                // When a handler fails, the queries of allegedly successful previous handlers just got rolled back.
                throw new HandlerFailedException($exception->getEnvelope()->withoutAll(HandledStamp::class), $exception->getWrappedExceptions());
            }

            throw $exception;
        } finally {
            $connection = $entityManager->getConnection();

            if (!$success && $connection->isTransactionActive()) {
                $connection->rollBack();
            }
        }
    }
}