StateTransitionValidation.php in Drupal 9

Namespace

Drupal\content_moderation

File

core/modules/content_moderation/src/StateTransitionValidation.php

<?php

namespace Drupal\content_moderation;

use Drupal\Core\Entity\ContentEntityInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\workflows\StateInterface;
use Drupal\workflows\Transition;
use Drupal\workflows\WorkflowInterface;

/**
 * Validates whether a certain state transition is allowed.
 */
class StateTransitionValidation implements StateTransitionValidationInterface {

  /**
   * The moderation information service.
   *
   * @var \Drupal\content_moderation\ModerationInformationInterface
   */
  protected $moderationInfo;

  /**
   * Stores the possible state transitions.
   *
   * @var array
   */
  protected $possibleTransitions = [];

  /**
   * Constructs a new StateTransitionValidation.
   *
   * @param \Drupal\content_moderation\ModerationInformationInterface $moderation_info
   *   The moderation information service.
   */
  public function __construct(ModerationInformationInterface $moderation_info) {
    $this->moderationInfo = $moderation_info;
  }

  /**
   * {@inheritdoc}
   */
  public function getValidTransitions(ContentEntityInterface $entity, AccountInterface $user) {
    $workflow = $this->moderationInfo
      ->getWorkflowForEntity($entity);
    $current_state = $entity->moderation_state->value ? $workflow
      ->getTypePlugin()
      ->getState($entity->moderation_state->value) : $workflow
      ->getTypePlugin()
      ->getInitialState($entity);
    return array_filter($current_state
      ->getTransitions(), function (Transition $transition) use ($workflow, $user) {
      return $user
        ->hasPermission('use ' . $workflow
        ->id() . ' transition ' . $transition
        ->id());
    });
  }

  /**
   * {@inheritdoc}
   */
  public function isTransitionValid(WorkflowInterface $workflow, StateInterface $original_state, StateInterface $new_state, AccountInterface $user, ContentEntityInterface $entity) {
    $transition = $workflow
      ->getTypePlugin()
      ->getTransitionFromStateToState($original_state
      ->id(), $new_state
      ->id());
    return $user
      ->hasPermission('use ' . $workflow
      ->id() . ' transition ' . $transition
      ->id());
  }

}

Classes

Name	Description
StateTransitionValidation	Validates whether a certain state transition is allowed.