EntityTagPlugin.php in Extensible BBCode 8.3

Namespace

Drupal\xbbcode\Plugin\XBBCode

File

src/Plugin/XBBCode/EntityTagPlugin.php

<?php

namespace Drupal\xbbcode\Plugin\XBBCode;

use Drupal\Core\Entity\EntityStorageInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Template\TwigEnvironment;
use Drupal\xbbcode\Entity\TagInterface;
use Drupal\xbbcode\Parser\Tree\TagElementInterface;
use Drupal\xbbcode\Plugin\TemplateTagPlugin;
use Drupal\xbbcode\TagProcessResult;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Twig_TemplateWrapper;

/**
 * A tag plugin based on a custom tag entity.
 *
 * @XBBCodeTag(
 *  id = "xbbcode_tag",
 *  label = "Custom tag",
 *  admin_label = @Translation("Custom tag"),
 *  category = @Translation("Custom"),
 *  deriver = "Drupal\xbbcode\Plugin\Derivative\TagPluginDeriver"
 * )
 */
class EntityTagPlugin extends TemplateTagPlugin implements ContainerFactoryPluginInterface {

  /**
   * The prefix that precedes an inline template.
   *
   * @var string
   */
  public const TEMPLATE_PREFIX = '{# inline_template_start #}';

  /**
   * The entity storage.
   *
   * @var \Drupal\Core\Entity\EntityStorageInterface
   */
  protected $storage;

  /**
   * The custom tag entity this plugin is derived from.
   *
   * (Not serialized for performance reasons.)
   *
   * @var \Drupal\xbbcode\Entity\TagInterface
   */
  private $entity;

  /**
   * Constructs a new custom tag plugin.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin ID for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Template\TwigEnvironment $twig
   *   The twig template loader.
   * @param \Drupal\Core\Entity\EntityStorageInterface $storage
   *   The tag storage.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, TwigEnvironment $twig, EntityStorageInterface $storage) {
    parent::__construct($configuration, $plugin_id, $plugin_definition, $twig);
    $this->storage = $storage;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container
      ->get('twig'), $container
      ->get('entity_type.manager')
      ->getStorage('xbbcode_tag'));
  }

  /**
   * {@inheritdoc}
   */
  public function getTemplate() : Twig_TemplateWrapper {

    // Lazily prepare the template, if it does not exist yet.
    if ($this->template === NULL) {
      $entity = $this
        ->getEntity();
      $code = $entity
        ->getTemplateCode();
      $file = $entity
        ->getTemplateFile();
      $this->template = $file && !$code ? $file : self::TEMPLATE_PREFIX . $code;
    }

    // Delegate template-loading to the parent.
    return parent::getTemplate();
  }

  /**
   * {@inheritdoc}
   */
  public function doProcess(TagElementInterface $tag) : TagProcessResult {
    $result = parent::doProcess($tag);
    $result
      ->addCacheableDependency($this
      ->getEntity());
    $result
      ->addAttachments($this
      ->getEntity()
      ->getAttachments());
    return $result;
  }

  /**
   * Loads the custom tag entity of the plugin.
   *
   * @return \Drupal\xbbcode\Entity\TagInterface
   *   The custom tag entity.
   */
  protected function getEntity() : TagInterface {
    if (!$this->entity) {
      $id = $this
        ->getDerivativeId();
      $this->entity = $this->storage
        ->load($id);
    }
    return $this->entity;
  }

}

Classes

Name	Description
EntityTagPlugin	A tag plugin based on a custom tag entity.