{% extends "base/class.php.twig" %}

{% block file_path %}
\Drupal\{{ module }}\{{ plugin_class }}Manager.
{% endblock %}

{% block namespace_class %}
namespace Drupal\{{ module }};
{% endblock %}

{% block use_class %}
use Drupal\Component\Plugin\Exception\PluginException;
use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Plugin\DefaultPluginManager;
use Drupal\Core\Plugin\Discovery\ContainerDerivativeDiscoveryDecorator;
use Drupal\Core\Plugin\Discovery\YamlDiscovery;
{% endblock %}

{% block class_declaration %}
/**
 * Provides the default {{ plugin_name }} manager.
 */
class {{ plugin_class }}Manager extends DefaultPluginManager implements {{ plugin_class }}ManagerInterface {% endblock %}
{% block class_methods %}
  /**
   * Provides default values for all {{ plugin_name }} plugins.
   *
   * @var array
   */
  protected $defaults = [
    // Add required and optional plugin properties.
    'id' => '',
    'label' => '',
  ];

  /**
   * Constructs a new {{ plugin_class }}Manager object.
   *
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
   *   The module handler.
   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
   *   Cache backend instance to use.
   */
  public function __construct(ModuleHandlerInterface $module_handler, CacheBackendInterface $cache_backend) {
    // Add more services as required.
    $this->moduleHandler = $module_handler;
    $this->setCacheBackend($cache_backend, '{{ plugin_name }}', ['{{ plugin_name }}']);
  }

  /**
   * {@inheritdoc}
   */
  protected function getDiscovery() {
    if (!isset($this->discovery)) {
      $this->discovery = new YamlDiscovery('{{ plugin_file_name }}', $this->moduleHandler->getModuleDirectories());
      $this->discovery->addTranslatableProperty('label', 'label_context');
      $this->discovery = new ContainerDerivativeDiscoveryDecorator($this->discovery);
    }
    return $this->discovery;
  }

  /**
   * {@inheritdoc}
   */
  public function processDefinition(&$definition, $plugin_id) {
    parent::processDefinition($definition, $plugin_id);

    // You can add validation of the plugin definition here.
    if (empty($definition['id'])) {
      throw new PluginException(sprintf('Example plugin property (%s) definition "is" is required.', $plugin_id));
    }
  }

  // Add other methods here as defined in the {{ plugin_class }}ManagerInterface.
{% endblock %}