/**
  * {@inheritdoc}
  */
 public function buildConfigurationForm(array $form, FormStateInterface $form_state)
 {
     $form = [];
     // If we are on admin/config/system/actions and use CREATE AN ADVANCED ACTION
     // Then $context only contains:
     // - $context['actions_label'] = "Change workflow state of post to new state"
     // - $context['actions_type'] = "entity"
     //
     // If we are on a VBO action form, then $context only contains:
     // - $context['entity_type'] = "node"
     // - $context['view'] = "(Object) view"
     // - $context['settings'] = "array()"
     // @todo: test with multiple workflows per entity.
     $wids = workflow_get_workflow_names();
     $wid = array_keys($wids)[0];
     // Get the common Workflow, or create a dummy Workflow.
     $workflow = $wid ? Workflow::load($wid) : Workflow::create(['id' => 'dummy_action', 'label' => 'dummy_action']);
     $current_state = $workflow->getCreationState();
     /* // @TODO D8-port
         // Show the current state and the Workflow form to allow state changing.
         // N.B. This part is replicated in hook_node_view, workflow_tab_page, workflow_vbo.
         if ($workflow) {
           $field = _workflow_info_field($field_name, $workflow);
           $field_name = $field['field_name'];
           $field_id = $field['id'];
           $instance = field_info_instance($entity_type, $field_name, $entity_bundle);
     
           // Hide the submit button. VBO has its own 'next' button.
           $instance['widget']['settings']['submit_function'] = '';
           if (!$field_id) {
             // This is a Workflow Node workflow. Set widget options as in v7.x-1.2
             $field['settings']['widget']['comment'] = isset($workflow->options['comment_log_tab']) ? $workflow->options['comment_log_tab'] : 1; // vs. ['comment_log_node'];
             $field['settings']['widget']['current_status'] = TRUE;
             // As stated above, the options list is probably very long, so let's use select list.
             $field['settings']['widget']['options'] = 'select';
             // Do not show the default [Update workflow] button on the form.
             $instance['widget']['settings']['submit_function'] = '';
           }
         }
     
         // Add the form/widget to the formatter, and include the nid and field_id in the form id,
         // to allow multiple forms per page (in listings, with hook_forms() ).
         // Ultimately, this is a wrapper for WorkflowDefaultWidget.
         // $form['workflow_current_state'] = workflow_state_formatter($entity_type, $entity, $field, $instance);
         $form_id = implode('_', array(
           'workflow_transition_form',
           $entity_type,
           $entity_id,
           $field_id
         ));
     */
     $transition = $this->getTransitionForConfiguration($current_state);
     // Add the WorkflowTransitionForm to the page.
     // Here, not the $element is added, but the entity form.
     $element = [];
     // Just to be explicit.
     $element['#default_value'] = $transition;
     $form += WorkflowTransitionElement::transitionElement($element, $form_state, $form);
     // Remove the transition: generates an error upon saving the action definition.
     unset($form['workflow_transition']);
     // Todo D8: add the entity form.
     //$form = \Drupal::getContainer()->get('entity.form_builder')->getForm($transition, 'add');
     // Remove the action button. The Entity itself has one.
     //unset($element['actions']);
     // Make adaptations for VBO-form:
     $entity = $transition->getTargetEntity();
     $field_name = $transition->getFieldName();
     $force = $this->configuration['force'];
     // Override the options widget.
     $form['to_sid']['#description'] = t('Please select the state that should be assigned when this action runs.');
     // Add Field_name. @todo?? Add 'field_name' to WorkflowTransitionElement?
     $form['field_name'] = array('#type' => 'select', '#title' => t('Field name'), '#description' => t('Choose the field name.'), '#options' => _workflow_info_field_names($entity), '#default_value' => $field_name, '#required' => TRUE, '#weight' => -20);
     // Add Force. @todo?? Add 'force' to WorkflowTransitionElement?
     $form['force'] = array('#type' => 'checkbox', '#title' => t('Force transition'), '#description' => t('If this box is checked, the new state will be assigned even if workflow permissions disallow it.'), '#default_value' => $force, '#weight' => -19);
     // Change comment field.
     $form['comment'] = array('#title' => t('Message'), '#description' => t('This message will be written into the workflow history log when the action
   runs. You may include the following variables: %state, %title, %user.')) + $form['comment'];
     return $form;
 }
 /**
  * {@inheritdoc}
  *
  * Implements workflow_transition() -> WorkflowDefaultWidget::submit().
  *
  * Overrides submit(array $form, array &$form_state).
  * Contains 2 extra parameters for D7
  *
  * @param array $form
  * @param array $form_state
  * @param array $items
  *   The value of the field.
  * @param bool $force
  *   TRUE if all access must be overridden, e.g., for Rules.
  *
  * @return int
  *   If update succeeded, the new State Id. Else, the old Id is returned.
  *
  * This is called from function _workflowfield_form_submit($form, &$form_state)
  * It is a replacement of function workflow_transition($entity, $to_sid, $force, $field)
  * It performs the following actions;
  * - save a scheduled action
  * - update history
  * - restore the normal $items for the field.
  * @todo: remove update of {node_form} table. (separate task, because it has features, too)
  */
 public function massageFormValues(array $values, array $form, FormStateInterface $form_state)
 {
     $user = workflow_current_user();
     // @todo #2287057: verify if submit() really is only used for UI. If not, $user must be passed.
     // Set the new value.
     // Beware: We presume cardinality = 1 !!
     // The widget form element type has transformed the value to a
     // WorkflowTransition object at this point. We need to convert it
     // back to the regular 'value' string format.
     foreach ($values as &$item) {
         if (!empty($item)) {
             // } && $item['value'] instanceof DrupalDateTime) {
             // The following can NOT be retrieved from the WorkflowTransition.
             /* @var $entity EntityInterface */
             $entity = $form_state->getFormObject()->getEntity();
             /* @var $transition \Drupal\workflow\Entity\WorkflowTransitionInterface */
             $transition = $item['workflow_transition'];
             $field_name = $transition->getFieldName();
             // N.B. Use a proprietary version of copyFormValuesToEntity,
             // where $entity/$transition is passed by reference.
             // $this->copyFormValuesToEntity($entity, $form, $form_state);
             /* @var $transition \Drupal\workflow\Entity\WorkflowTransitionInterface */
             $transition = WorkflowTransitionElement::copyFormItemValuesToEntity($transition, $form, $item);
             // Try to execute the transition. Return $from_sid when error.
             if (!$transition) {
                 // This should not be possible (perhaps when testing/developing).
                 drupal_set_message(t('Error: the transition from %from_sid to %to_sid could not be generated.'), 'error');
                 // The current value is still the previous state.
                 $to_sid = $from_sid;
             } else {
                 // The transition may be scheduled or not. Save the result, and
                 // rely upon hook workflow_entity_insert/update($entity) in
                 // file workflow.module to save/execute the transition.
                 // - validate option; add hook to let other modules change comment.
                 // - add to history; add to watchdog
                 // Return the new State ID. (Execution may fail and return the old Sid.)
                 // Get the new value from an action button if set in the workflow settings.
                 $action_info = _workflow_transition_form_get_triggering_button($form_state);
                 if ($field_name == $action_info['field_name']) {
                     $transition->to_sid->value = $action_info['to_sid'];
                 }
                 $force = FALSE;
                 // @TODO D8-port: add to form for usage in VBO.
                 // Now, save/execute the transition.
                 $from_sid = $transition->getFromSid();
                 $force = $force || $transition->isForced();
                 if (!$transition->isAllowed($user, $force)) {
                     // Transition is not allowed.
                     $to_sid = $from_sid;
                 } elseif (!$entity || !$entity->id()) {
                     // Entity is inserted. The Id is not yet known.
                     // So we can't yet save the transition right now, but must rely on
                     // function/hook workflow_entity_insert($entity) in file workflow.module.
                     // $to_sid = $transition->execute($force);
                     $to_sid = $transition->getToSid();
                 } else {
                     // Entity is updated. To stay in sync with insert, we rely on
                     // function/hook workflow_entity_update($entity) in file workflow.module.
                     // $to_sid = $transition->execute($force);
                     $to_sid = $transition->getToSid();
                 }
             }
             // Now the data is captured in the Transition, and before calling the
             // Execution, restore the default values for Workflow Field.
             // For instance, workflow_rules evaluates this.
             //
             // Set the transition back, to be used in hook_entity_update().
             $item['workflow_transition'] = $transition;
             //
             // Set the value at the proper location.
             $item['value'] = $to_sid;
         }
     }
     return $values;
 }
 /**
  * {@inheritdoc}
  */
 public function buildEntity(array $form, FormStateInterface $form_state)
 {
     $entity = clone $this->entity;
     // N.B. Use a proprietary version of copyFormValuesToEntity,
     // where $entity is passed by reference.
     // $this->copyFormValuesToEntity($entity, $form, $form_state);
     $item = $form_state->getValues();
     $entity = WorkflowTransitionElement::copyFormItemValuesToEntity($entity, $form, $item);
     // Mark the entity as NOT requiring validation. (Used in validateForm().)
     $entity->setValidationRequired(FALSE);
     return $entity;
 }