computed_field-8.x-2.x-dev/modules/computed_field_ui/src/Plugin/Derivative/ComputedFieldLocalAction.php

<?php

namespace Drupal\computed_field_ui\Plugin\Derivative;

use Drupal\Component\Plugin\Derivative\DeriverBase;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides local action definitions for all entity bundles.
 */
class ComputedFieldLocalAction extends DeriverBase implements ContainerDeriverInterface {

  use StringTranslationTrait;

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

  /**
   * Constructs a FieldUiLocalAction object.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   */
  public function __construct(EntityTypeManagerInterface $entity_type_manager) {
    $this->entityTypeManager = $entity_type_manager;
  }

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

  /**
   * {@inheritdoc}
   */
  public function getDerivativeDefinitions($base_plugin_definition) {
    $this->derivatives = [];

    foreach ($this->entityTypeManager->getDefinitions() as $entity_type_id => $entity_type) {
      if ($entity_type->get('field_ui_base_route')) {
        $this->derivatives["computed_field_add_$entity_type_id"] = [
          'route_name' => "entity.computed_field.computed_field_add_$entity_type_id",
          'title' => $this->t('Add computed field'),
          'appears_on' => ["entity.$entity_type_id.field_ui_fields"],
          'weight' => 10,
        ];
      }
    }

    foreach ($this->derivatives as &$entry) {
      $entry += $base_plugin_definition;
    }

    return $this->derivatives;
  }

}