WorkflowsFieldContraintValidator.php in Workflows Field 8

Namespace

Drupal\workflows_field\Plugin\Validation\Constraint

File

src/Plugin/Validation/Constraint/WorkflowsFieldContraintValidator.php

<?php

namespace Drupal\workflows_field\Plugin\Validation\Constraint;

use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Session\AccountInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;

/**
 * Validates the workflows field.
 */
class WorkflowsFieldContraintValidator extends ConstraintValidator implements ContainerInjectionInterface {

  /**
   * Entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;

  /**
   * Drupal\Core\Session\AccountProxy definition.
   *
   * @var \Drupal\Core\Session\AccountProxy
   */
  protected $currentUser;

  /**
   * Creates an instance of WorkflowsFieldContraintValidator.
   */
  public function __construct(EntityTypeManagerInterface $entityTypeManager, AccountInterface $currentUser) {
    $this->entityTypeManager = $entityTypeManager;
    $this->currentUser = $currentUser;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('entity_type.manager'), $container
      ->get('current_user'));
  }

  /**
   * {@inheritdoc}
   */
  public function validate($field, Constraint $constraint) {

    /** @var \Drupal\workflows_field\Plugin\Field\FieldType\WorkflowsFieldItem $field */
    $entity = $field
      ->getEntity();
    $workflow_type = $field
      ->getWorkflow()
      ->getTypePlugin();

    // An entity can start its life in any state.
    if (!isset($field->value) || $entity
      ->isNew()) {
      return;
    }
    $original_entity = $this->entityTypeManager
      ->getStorage($entity
      ->getEntityTypeId())
      ->loadUnchanged($entity
      ->id());
    if (!$entity
      ->isDefaultTranslation() && $original_entity
      ->hasTranslation($entity
      ->language()
      ->getId())) {
      $original_entity = $original_entity
        ->getTranslation($entity
        ->language()
        ->getId());
    }
    $previous_state = $original_entity->{$field
      ->getFieldDefinition()
      ->getName()}->value;

    // The state does not have to change.
    if ($previous_state === $field->value) {
      return;
    }
    if (!$workflow_type
      ->hasTransitionFromStateToState($previous_state, $field->value)) {
      $this->context
        ->addViolation($constraint->message, [
        '%state' => $field->value,
        '%previous_state' => $previous_state,
      ]);
    }
    else {
      $transition = $workflow_type
        ->getTransitionFromStateToState($previous_state, $field->value);
      if (!$this->currentUser
        ->hasPermission(sprintf('use %s transition %s', $field
        ->getWorkflow()
        ->id(), $transition
        ->id()))) {
        $this->context
          ->addViolation($constraint->insufficientPermissionsTransition, [
          '%transition' => $transition
            ->label(),
        ]);
      }
    }
  }

}

Classes

Name	Description
WorkflowsFieldContraintValidator	Validates the workflows field.