How to Dynamically Configure Form Validation Groups

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// src/Validation/ValidationGroupResolver.php
namespace App\Validation;

use Symfony\Component\Form\FormInterface;

class ValidationGroupResolver
{
    private $service1;

    private $service2;

    public function __construct($service1, $service2)
    {
        $this->service1 = $service1;
        $this->service2 = $service2;
    }

    public function __invoke(FormInterface $form): array
    {
        $groups = [];

        // ... determine which groups to apply and return an array

        return $groups;
    }
}

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// src/Form/MyClassType.php;
namespace App\Form;

use App\Validation\ValidationGroupResolver;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\OptionsResolver\OptionsResolver;

class MyClassType extends AbstractType
{
    private $groupResolver;

    public function __construct(ValidationGroupResolver $groupResolver)
    {
        $this->groupResolver = $groupResolver;
    }

    // ...
    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            'validation_groups' => $this->groupResolver,
        ]);
    }
}