SearchLocalTask.php

<?php

namespace Drupal\search\Plugin\Derivative;

use Drupal\Component\Plugin\Derivative\DeriverBase;
use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
use Drupal\search\SearchPageRepositoryInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides local tasks for each search page.
 */
class SearchLocalTask extends DeriverBase implements ContainerDeriverInterface {
    
    /**
     * The search page repository.
     *
     * @var \Drupal\search\SearchPageRepositoryInterface
     */
    protected $searchPageRepository;
    
    /**
     * Constructs a new SearchLocalTask.
     *
     * @param \Drupal\search\SearchPageRepositoryInterface $search_page_repository
     *   The search page repository.
     */
    public function __construct(SearchPageRepositoryInterface $search_page_repository) {
        $this->searchPageRepository = $search_page_repository;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, $base_plugin_id) {
        return new static($container->get('search.search_page_repository'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDerivativeDefinitions($base_plugin_definition) {
        $this->derivatives = [];
        if ($this->searchPageRepository
            ->getDefaultSearchPage()) {
            $active_search_pages = $this->searchPageRepository
                ->getActiveSearchPages();
            foreach ($this->searchPageRepository
                ->sortSearchPages($active_search_pages) as $entity_id => $entity) {
                $this->derivatives[$entity_id] = [
                    'title' => $entity->label(),
                    'route_name' => 'search.view_' . $entity_id,
                    'base_route' => 'search.view',
                    'weight' => $entity->getWeight(),
                ];
            }
        }
        return $this->derivatives;
    }

}