function workflow_entity_operation in Workflow 8

@inheritdoc

Core hooks: Change the operations column in a Entity list. Adds a 'revert' operation.

See also

EntityListBuilder::getOperations()

File

./workflow.entity.inc, line 20

Implements entity hooks.

Code

function workflow_entity_operation(EntityInterface $entity) {
  $operations = [];

  // Only add 'revert' to the first row. Skip all following records.
  static $first = TRUE;
  if (!$first) {
    return $operations;
  }

  // Check correct entity type.
  if (!in_array($entity
    ->getEntityTypeId(), [
    'workflow_transition',
  ])) {

    // Avoid future calls.
    $first = FALSE;
    return $operations;
  }

  /** @var \Drupal\workflow\Entity\WorkflowTransitionInterface $transition */
  $transition = $entity;
  if (!$transition
    ->isRevertable()) {

    // Some states are not fit to revert to.
    // In each of these cases, prohibit to revert to an even older state.
    $first = FALSE;
    return $operations;
  }
  $user = workflow_current_user();
  $handler = new WorkflowAccessControlHandler($transition
    ->getEntityType());
  if ($handler
    ->access($transition, 'revert', $user, FALSE)) {

    // User has access to revert to a previous state.
    // And the operation is not vetoed by other module.
    // Note: revert_form route is determined in WorkflowTransition Annotation.
    $operations['revert'] = [
      'title' => t('Revert to last state'),
      'url' => Url::fromRoute('entity.workflow_transition.revert_form', [
        'workflow_transition' => $transition
          ->id(),
      ]),
      'query' => \Drupal::destination()
        ->getAsArray(),
      'weight' => 50,
    ];

    // No need to read the following records.
    $first = FALSE;
  }
  return $operations;
}