class SubmissionStrategyFactory implements ServiceSubscriberInterface
{
    public function __construct(private readonly ContainerInterface $locator)
    {
    }

    public function getStrategy(IllustrationSubmission $submission): SubmissionStrategyInterface
    {
        if ($submission->getIllustrationFile()) {
            return $this->locator->get('upload');
        }

        return $this->locator->get('url');
    }

    public static function getSubscribedServices(): iterable
    {
        yield 'upload' => UploadStrategy::class;
        yield 'url' => UrlStrategy::class;
    }
}