mustache_templates-8.x-1.0-beta4/modules/mustache_magic/src/Plugin/mustache/Magic/Template.php

<?php

namespace Drupal\mustache_magic\Plugin\mustache\Magic;

use Drupal\mustache\Plugin\MustacheMagic;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Make contents reusable as a named template.
 *
 * Usage:
 *
 * You can use the "magical" {{#template.<name>}} variable to register
 * enclosed contents as a named Mustache template. This can be then reused as
 * partial or inclusion somewhere else.
 *
 * @code
 * {{#template.greeting}}Hello {{name}}!{{/template.greeting}}
 * {{#if.user.defined}}{{#user}}{{> greeting}}{{/user}}{{/if.user.defined}}
 * @endcode
 *
 * @MustacheMagic(
 *   id = "template",
 *   label = @Translation("Template"),
 *   description = @Translation("Use <b>{{#template.&lt;name&gt;}}</b> to register enclosed contents as a named Mustache template. This can be then reused as partial or inclusion somewhere else. Examples: <ul><li>{{#template.greeting}}Hello {{name}}!{{/template.greeting}}<br/>{{#if.user.defined}}{{#user}}{{> greeting}}{{/user}}{{/if.user.defined}}</li></ul>")
 * )
 */
class Template extends MustacheMagic {

  /**
   * Whether this object is a clone.
   *
   * @var bool
   */
  protected $cloned = FALSE;

  /**
   * The template storage.
   *
   * @var \Drupal\mustache_magic\Storage\MustacheTemplateStorage
   */
  protected $templateStorage;

  /**
   * The template name.
   *
   * @var string|null
   */
  protected $templateName;

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    $instance = parent::create($container, $configuration, $plugin_id, $plugin_definition);
    $instance->templateStorage = $container->get('mustache.template_storage');
    return $instance;
  }

  /**
   * Implementation of the magic __isset() method.
   */
  public function __isset($name): bool {
    return !empty($name) || (!is_null($name) && is_scalar($name) && (trim((string) $name) !== ''));
  }

  /**
   * Implementation of the magic __get() method.
   */
  public function __get($name) {
    if (!$this->cloned) {
      $cloned = clone $this;
      $cloned->cloned = TRUE;
      return $cloned->__get($name);
    }
    $this->templateName = mb_strtolower(trim($name));
    return $this;
  }

  /**
   * Implements the magic __invoke() method, used as higher-order section.
   */
  public function __invoke($template_content = NULL, $render = NULL) {
    if (!isset($template_content, $render)) {
      return;
    }

    $template_name = $this->templateName ?? hash('md4', $template_content);
    $this->templateStorage->registerTemplate($template_name, $template_content);
    return "";
  }

}