FieldUiLocalAction.php

<?php

namespace Drupal\field_ui\Plugin\Derivative;

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

/**
 * Provides local action definitions for all entity bundles.
 */
class FieldUiLocalAction extends DeriverBase implements ContainerDeriverInterface {
    use StringTranslationTrait;
    
    /**
     * The route provider to load routes by name.
     */
    protected $routeProvider;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * Constructs a FieldUiLocalAction object.
     *
     * @param \Drupal\Core\Routing\RouteProviderInterface $route_provider
     *   The route provider to load routes by name.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     */
    public function __construct(RouteProviderInterface $route_provider, EntityTypeManagerInterface $entity_type_manager) {
        $this->routeProvider = $route_provider;
        $this->entityTypeManager = $entity_type_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, $base_plugin_id) {
        return new static($container->get('router.route_provider'), $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')) {
                $this->derivatives["field_storage_config_add_{$entity_type_id}"] = [
                    'route_name' => "field_ui.field_storage_config_add_{$entity_type_id}",
                    'title' => $this->t('Add field'),
                    'appears_on' => [
                        "entity.{$entity_type_id}.field_ui_fields",
                    ],
                ];
            }
        }
        foreach ($this->derivatives as &$entry) {
            $entry += $base_plugin_definition;
        }
        return $this->derivatives;
    }

}