DynamicLocalTasks.php

<?php

namespace Drupal\content_moderation\Plugin\Derivative;

use Drupal\Component\Plugin\Derivative\DeriverBase;
use Drupal\content_moderation\ModerationInformationInterface;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\Core\StringTranslation\TranslationInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Routing\RouterInterface;

/**
 * Generates moderation-related local tasks.
 */
class DynamicLocalTasks extends DeriverBase implements ContainerDeriverInterface {
    use StringTranslationTrait;
    
    /**
     * The base plugin ID.
     *
     * @var string
     */
    protected $basePluginId;
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The moderation information service.
     *
     * @var \Drupal\content_moderation\ModerationInformationInterface
     */
    protected $moderationInfo;
    
    /**
     * The router.
     *
     * @var \Symfony\Component\Routing\RouterInterface
     */
    protected $router;
    
    /**
     * Creates a FieldUiLocalTask object.
     *
     * @param string $base_plugin_id
     *   The base plugin ID.
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param \Drupal\Core\StringTranslation\TranslationInterface $string_translation
     *   The translation manager.
     * @param \Drupal\content_moderation\ModerationInformationInterface $moderation_information
     *   The moderation information service.
     * @param \Symfony\Component\Routing\RouterInterface $router
     *   The router.
     */
    public function __construct($base_plugin_id, EntityTypeManagerInterface $entity_type_manager, TranslationInterface $string_translation, ModerationInformationInterface $moderation_information, RouterInterface $router) {
        $this->entityTypeManager = $entity_type_manager;
        $this->stringTranslation = $string_translation;
        $this->basePluginId = $base_plugin_id;
        $this->moderationInfo = $moderation_information;
        $this->router = $router;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, $base_plugin_id) {
        return new static($base_plugin_id, $container->get('entity_type.manager'), $container->get('string_translation'), $container->get('content_moderation.moderation_information'), $container->get('router'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDerivativeDefinitions($base_plugin_definition) {
        $this->derivatives = [];
        // Add the moderated content task if the route exists.
        if ($this->router
            ->getRouteCollection()
            ->get('content_moderation.admin_moderated_content') !== NULL) {
            $this->derivatives['content_moderation.moderated_content'] = [
                'route_name' => 'content_moderation.admin_moderated_content',
                'title' => $this->t('Moderated content'),
                'parent_id' => 'system.admin_content',
                'weight' => 1,
            ];
        }
        // Add the latest version tab to entities.
        $latest_version_entities = array_filter($this->entityTypeManager
            ->getDefinitions(), function (EntityTypeInterface $type) {
            return $this->moderationInfo
                ->canModerateEntitiesOfEntityType($type) && $type->hasLinkTemplate('latest-version');
        });
        foreach ($latest_version_entities as $entity_type_id => $entity_type) {
            $this->derivatives["{$entity_type_id}.latest_version_tab"] = [
                'route_name' => "entity.{$entity_type_id}.latest_version",
                'title' => $this->t('Latest version'),
                'base_route' => "entity.{$entity_type_id}.canonical",
                'weight' => 1,
            ] + $base_plugin_definition;
        }
        return $this->derivatives;
    }

}