Locale aware emails

LocaleAwareEmailRenderer.php

<?php

namespace App\Email;

use Sylius\Component\Mailer\Model\EmailInterface;
use Sylius\Component\Mailer\Renderer\Adapter\AdapterInterface;
use Sylius\Component\Mailer\Renderer\RenderedEmail;
use Symfony\Contracts\Translation\LocaleAwareInterface;
use Symfony\Contracts\Translation\TranslatorInterface;
use function get_class;
use function sprintf;

final class LocaleAwareEmailRenderer implements AdapterInterface
{
    /**
     * @var AdapterInterface
     */
    private $adapter;

    /**
     * @var TranslatorInterface&LocaleAwareInterface
     */
    private $translator;

    /**
     * @param AdapterInterface $adapter
     * @param TranslatorInterface $translator
     */
    public function __construct(AdapterInterface $adapter, TranslatorInterface $translator)
    {
        if ($this->translator instanceof LocaleAwareInterface) {
            throw new \InvalidArgumentException(sprintf(
                'The Translator "%s" must implement %s.',
                get_class($translator),
                LocaleAwareInterface::class
            ));
        }

        $this->adapter = $adapter;
        $this->translator = $translator;
    }

    public function render(EmailInterface $email, array $data = []): RenderedEmail
    {
        if (isset($data['_locale'])) {
            $locale = $this->translator->getLocale();
            $this->translator->setLocale($data['_locale']);
        }

        $renderedEmail = $this->adapter->render($email, $data);

        if (isset($locale)) {
            $this->translator->setLocale($locale);
        }

        return $renderedEmail;
    }
}