UploadedFileValidator.php

<?php

declare (strict_types=1);
namespace Drupal\file\Validation;

use Drupal\Core\Validation\BasicRecursiveValidatorFactory;
use Drupal\file\Validation\Constraint\UploadedFileConstraint;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\Validator\ConstraintViolationListInterface;
use Symfony\Component\Validator\Validator\ValidatorInterface;

/**
 * Validator for uploaded files.
 */
class UploadedFileValidator implements UploadedFileValidatorInterface {
    
    /**
     * The symfony validator.
     *
     * @var \Symfony\Component\Validator\Validator\ValidatorInterface
     */
    protected ValidatorInterface $validator;
    
    /**
     * Creates a new UploadedFileValidator.
     *
     * @param \Drupal\Core\Validation\BasicRecursiveValidatorFactory $validatorFactory
     *   The validator factory.
     */
    public function __construct(BasicRecursiveValidatorFactory $validatorFactory) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function validate(UploadedFile $uploadedFile, array $options = []) : ConstraintViolationListInterface {
        $constraint = new UploadedFileConstraint($options);
        return $this->getValidator()
            ->validate($uploadedFile, $constraint);
    }
    
    /**
     * Get the Symfony validator instance.
     *
     * @return \Symfony\Component\Validator\Validator\ValidatorInterface
     *   The Symfony validator.
     */
    protected function getValidator() : ValidatorInterface {
        if (!isset($this->validator)) {
            $this->validator = $this->validatorFactory
                ->createValidator();
        }
        return $this->validator;
    }

}