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<?php
namespace Drupal\file\Validation;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Validation\ConstraintManager;
use Drupal\file\FileInterface;
use Symfony\Component\Validator\ConstraintViolationListInterface;
use Symfony\Component\Validator\Validator\ValidatorInterface;
use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
/**
* Provides a class for file validation.
*/
class FileValidator implements FileValidatorInterface {
/**
* Creates a new FileValidator.
*
* @param \Symfony\Component\Validator\Validator\ValidatorInterface $validator
* The validator.
* @param \Drupal\Core\Validation\ConstraintManager $constraintManager
* The constraint factory.
* @param \Symfony\Contracts\EventDispatcher\EventDispatcherInterface $eventDispatcher
* The event dispatcher.
* @param \Drupal\Core\Extension\ModuleHandlerInterface $moduleHandler
* The module handler.
*/
public function __construct(
protected ValidatorInterface $validator,
protected ConstraintManager $constraintManager,
protected EventDispatcherInterface $eventDispatcher,
protected ModuleHandlerInterface $moduleHandler,
) {}
/**
* {@inheritdoc}
*/
public function validate(FileInterface $file, array $validators): ConstraintViolationListInterface {
$constraints = [];
foreach ($validators as $validator => $options) {
// Create the constraint.
// Options are an associative array of constraint properties and values.
$constraints[] = $this->constraintManager->create($validator, $options);
}
// Get the typed data.
$fileTypedData = $file->getTypedData();
$violations = $this->validator->validate($fileTypedData, $constraints);
$this->eventDispatcher->dispatch(new FileValidationEvent($file, $violations));
// Always check the insecure upload constraint.
if (count($violations) === 0) {
$insecureUploadConstraint = $this->constraintManager->create('FileExtensionSecure', []);
$violations = $this->validator->validate($fileTypedData, $insecureUploadConstraint);
}
return $violations;
}
}
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