NullableEmbeddable.php

<?php

declare(strict_types=1);

namespace App\Something\Infrastructure\Doctrine\EventSubscriber;

use App\Something\Domain\Contracts\ContainsNullableEmbeddable;
use App\Something\Domain\Contracts\NullableEmbeddable as NullableEmbeddableInterface;
use Doctrine\Common\EventSubscriber;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Doctrine\ORM\Events;
use ReflectionObject;

final class NullableEmbeddable implements EventSubscriber
{
    public function getSubscribedEvents(): array
    {
        return [
            Events::postLoad
        ];
    }

    public function postLoad(LifecycleEventArgs $args): void
    {
        $entity = $args->getObject();

        if ($entity instanceof ContainsNullableEmbeddable) {
            $objectReflection = new ReflectionObject($entity);
            foreach ($objectReflection->getProperties() as $property) {
                if (preg_match('/@.*?Embedded\(/', $property->getDocComment())) {
                    $property->setAccessible(true);
                    $value = $property->getValue($entity);
                    if (($value instanceof NullableEmbeddableInterface) && $this->allPropertiesAreNull($value)) {
                        $property->setValue($entity, null);
                    }
                }
            }
        }
    }

    private function allPropertiesAreNull(NullableEmbeddableInterface $object): bool
    {
        $objectReflection = new ReflectionObject($object);
        foreach ($objectReflection->getProperties() as $property) {
            $property->setAccessible(true);
            if (null !== $property->getValue($object)) {
                return false;
            }
        }

        return true;
    }
}