EntityCloneContextualLinks.php

<?php

namespace Drupal\entity_clone\Plugin\Derivative;

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

/**
 * Class EntityCloneContextualLinks
 *
 * @package Drupal\entity_clone\Plugin\Derivative
 */
class EntityCloneContextualLinks extends DeriverBase implements ContainerDeriverInterface {
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The translation manager.
     *
     * @var \Drupal\Core\StringTranslation\TranslationManager
     */
    protected $translationManager;
    
    /**
     * Constructs a new EntityCloneContextualLinks.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entityTypeManager
     *   The entity type manager.
     * @param \Drupal\Core\StringTranslation\TranslationManager $stringTranslation
     */
    public function __construct(EntityTypeManagerInterface $entityTypeManager, TranslationManager $stringTranslation) {
        $this->entityTypeManager = $entityTypeManager;
        $this->translationManager = $stringTranslation;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, $base_plugin_id) {
        return new static($container->get('entity_type.manager'), $container->get('string_translation'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDerivativeDefinitions($base_plugin_definition) {
        // Create contextual links for entity clone.
        foreach ($this->entityTypeManager
            ->getDefinitions() as $entity_type_id => $entity_type) {
            $this->derivatives["{$entity_type_id}.clone_tab"] = [
                'route_name' => "entity.{$entity_type_id}.clone_form",
                'title' => $this->translationManager
                    ->translate('Clone'),
                'group' => $entity_type_id,
            ];
        }
        return parent::getDerivativeDefinitions($base_plugin_definition);
    }

}