RulesComponentActionDeriver.php

<?php

namespace Drupal\rules\Plugin\RulesAction;

use Drupal\Component\Plugin\Derivative\DeriverBase;
use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
use Drupal\rules\Engine\ExpressionManagerInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Derives Rules component action plugin definitions from config entities.
 *
 * @see \Drupal\rules\Plugin\RulesAction\RulesComponentAction
 */
class RulesComponentActionDeriver extends DeriverBase implements ContainerDeriverInterface {
    use StringTranslationTrait;
    
    /**
     * The config entity storage that holds Rules components.
     *
     * @var \Drupal\Core\Entity\EntityStorageInterface
     */
    protected $storage;
    
    /**
     * The Rules expression manager.
     *
     * @var \Drupal\rules\Engine\ExpressionManagerInterface
     */
    protected $expressionManager;
    
    /**
     * Creates a new RulesComponentActionDeriver object.
     *
     * @param \Drupal\Core\Entity\EntityStorageInterface $storage
     *   The entity storage.
     * @param \Drupal\rules\Engine\ExpressionManagerInterface $expression_manager
     *   The Rules expression manager.
     */
    public function __construct(EntityStorageInterface $storage, ExpressionManagerInterface $expression_manager) {
        $this->storage = $storage;
        $this->expressionManager = $expression_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, $base_plugin_id) {
        return new static($container->get('entity_type.manager')
            ->getStorage('rules_component'), $container->get('plugin.manager.rules_expression'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDerivativeDefinitions($base_plugin_definition) {
        $rules_components = $this->storage
            ->loadMultiple();
        foreach ($rules_components as $rules_component) {
            $component_config = $rules_component->get('component');
            $expression_definition = $this->expressionManager
                ->getDefinition($component_config['expression']['id']);
            $this->derivatives[$rules_component->id()] = [
                'label' => $this->t('@expression_type: @label', [
                    '@expression_type' => $expression_definition['label'],
                    '@label' => $rules_component->label(),
                ]),
                'category' => $this->t('Components'),
                'component_id' => $rules_component->id(),
                'context_definitions' => $rules_component->getContextDefinitions(),
                'provides' => $rules_component->getProvidedContextDefinitions(),
            ] + $base_plugin_definition;
        }
        return $this->derivatives;
    }

}