WorkflowAddForm.php

<?php

namespace Drupal\workflows\Form;

use Drupal\Component\Plugin\PluginManagerInterface;
use Drupal\workflows\Entity\Workflow;
use Drupal\Core\Entity\EntityForm;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Form\FormStateInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Form for adding workflows.
 *
 * @internal
 */
class WorkflowAddForm extends EntityForm {
    
    /**
     * The workflow type plugin manager.
     *
     * @var \Drupal\Component\Plugin\PluginManagerInterface
     */
    protected $workflowTypePluginManager;
    
    /**
     * WorkflowAddForm constructor.
     *
     * @param \Drupal\Component\Plugin\PluginManagerInterface $workflow_type_plugin_manager
     *   The workflow type plugin manager.
     */
    public function __construct(PluginManagerInterface $workflow_type_plugin_manager) {
        $this->workflowTypePluginManager = $workflow_type_plugin_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container) {
        return new static($container->get('plugin.manager.workflows.type'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function form(array $form, FormStateInterface $form_state) {
        $form = parent::form($form, $form_state);
        
        /** @var \Drupal\workflows\WorkflowInterface $workflow */
        $workflow = $this->entity;
        $form['label'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Label'),
            '#maxlength' => 255,
            '#default_value' => $workflow->label(),
            '#required' => TRUE,
        ];
        $form['id'] = [
            '#type' => 'machine_name',
            '#default_value' => $workflow->id(),
            '#machine_name' => [
                'exists' => [
                    Workflow::class,
                    'load',
                ],
            ],
        ];
        $workflow_types = array_column($this->workflowTypePluginManager
            ->getDefinitions(), 'label', 'id');
        $form['workflow_type'] = [
            '#type' => 'select',
            '#title' => $this->t('Workflow type'),
            '#required' => TRUE,
            '#options' => $workflow_types,
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function save(array $form, FormStateInterface $form_state) {
        
        /** @var \Drupal\workflows\WorkflowInterface $workflow */
        $workflow = $this->entity;
        $return = $workflow->save();
        if (empty($workflow->getTypePlugin()
            ->getStates())) {
            $this->messenger()
                ->addStatus($this->t('Created the %label Workflow. In order for the workflow to be enabled there needs to be at least one state.', [
                '%label' => $workflow->label(),
            ]));
            $form_state->setRedirectUrl($workflow->toUrl('add-state-form'));
        }
        else {
            $this->messenger()
                ->addStatus($this->t('Created the %label Workflow.', [
                '%label' => $workflow->label(),
            ]));
            $form_state->setRedirectUrl($workflow->toUrl('edit-form'));
        }
        return $return;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function copyFormValuesToEntity(EntityInterface $entity, array $form, FormStateInterface $form_state) {
        // This form can only set the workflow's ID, label and the weights for each
        // state.
        
        /** @var \Drupal\workflows\WorkflowInterface $entity */
        $values = $form_state->getValues();
        $entity->set('label', $values['label']);
        $entity->set('id', $values['id']);
        $entity->set('type', $values['workflow_type']);
    }

}