RulesUiManager.php

<?php

namespace Drupal\rules\Ui;

use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Plugin\DefaultPluginManager;
use Drupal\Core\Plugin\Discovery\ContainerDerivativeDiscoveryDecorator;
use Drupal\Core\Plugin\Discovery\YamlDiscovery;
use Drupal\Core\Plugin\Factory\ContainerFactory;

/**
 * Plugin manager for Rules Ui instances.
 *
 * Rules UIs are primarily defined in *.rules_ui.yml files. Usually, there is
 * no need to specify a 'class' as there is a suiting default handler class in
 * place. However, if done see the class must implement
 * \Drupal\rules\Ui\RulesUiHandlerInterface.
 *
 * @see \Drupal\rules\Ui\RulesUiHandlerInterface
 */
class RulesUiManager extends DefaultPluginManager implements RulesUiManagerInterface {
    
    /**
     * {@inheritdoc}
     */
    public function __construct(ModuleHandlerInterface $module_handler) {
        $this->alterInfo('rules_ui_info');
        $this->discovery = new ContainerDerivativeDiscoveryDecorator(new YamlDiscovery('rules_ui', $module_handler->getModuleDirectories()));
        $this->factory = new ContainerFactory($this, RulesUiHandlerInterface::class);
        $this->moduleHandler = $module_handler;
    }
    
    /**
     * {@inheritdoc}
     */
    public function processDefinition(&$definition, $plugin_id) {
        $definition = new RulesUiDefinition($definition);
        $definition->validate();
    }

}