MenuLinkContentDeriver.php

<?php

namespace Drupal\menu_link_content\Plugin\Deriver;

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

/**
 * Provides a deriver for user entered paths of menu links.
 *
 * The assumption is that the number of manually entered menu links are lower
 * compared to entity referenced ones.
 */
class MenuLinkContentDeriver extends DeriverBase implements ContainerDeriverInterface {
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The menu link manager.
     *
     * @var \Drupal\Core\Menu\MenuLinkManagerInterface
     */
    protected $menuLinkManager;
    
    /**
     * Constructs a MenuLinkContentDeriver instance.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager
     *   The menu link manager.
     */
    public function __construct(EntityTypeManagerInterface $entity_type_manager, MenuLinkManagerInterface $menu_link_manager) {
        $this->entityTypeManager = $entity_type_manager;
        $this->menuLinkManager = $menu_link_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, $base_plugin_id) {
        return new static($container->get('entity_type.manager'), $container->get('plugin.manager.menu.link'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDerivativeDefinitions($base_plugin_definition) {
        // Get all custom menu links which should be rediscovered.
        $entity_ids = $this->entityTypeManager
            ->getStorage('menu_link_content')
            ->getQuery()
            ->accessCheck(FALSE)
            ->condition('rediscover', TRUE)
            ->execute();
        $plugin_definitions = [];
        $menu_link_content_entities = $this->entityTypeManager
            ->getStorage('menu_link_content')
            ->loadMultiple($entity_ids);
        
        /** @var \Drupal\menu_link_content\MenuLinkContentInterface $menu_link_content */
        foreach ($menu_link_content_entities as $menu_link_content) {
            $plugin_definitions[$menu_link_content->uuid()] = $menu_link_content->getPluginDefinition();
        }
        return $plugin_definitions;
    }

}