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<?php

namespace Drupal\Core\Render;

use Drupal\Core\GeneratedUrl;
use Drupal\Core\Routing\UrlGeneratorInterface;
use Symfony\Component\Routing\RequestContext as SymfonyRequestContext;

/**
 * Decorator for the URL generator, which bubbles bubbleable URL metadata.
 *
 * Implements a decorator for the URL generator that allows to automatically
 * collect and bubble up bubbleable metadata associated with URLs due to
 * outbound path and route processing. This approach helps keeping the render
 * and the routing subsystems decoupled.
 *
 * @see \Drupal\Core\RouteProcessor\OutboundRouteProcessorInterface
 * @see \Drupal\Core\PathProcessor\OutboundPathProcessorInterface
 * @see \Drupal\Core\Render\BubbleableMetadata
 */
class MetadataBubblingUrlGenerator implements UrlGeneratorInterface {

  /**
   * The non-bubbling URL generator.
   *
   * @var \Drupal\Core\Routing\UrlGeneratorInterface
   */
  protected $urlGenerator;

  /**
   * The renderer.
   *
   * @var \Drupal\Core\Render\RendererInterface
   */
  protected $renderer;

  /**
   * Constructs a new bubbling URL generator service.
   *
   * @param \Drupal\Core\Routing\UrlGeneratorInterface $url_generator
   *   The non-bubbling URL generator.
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer.
   */
  public function __construct(UrlGeneratorInterface $url_generator, RendererInterface $renderer) {
    $this->urlGenerator = $url_generator;
    $this->renderer = $renderer;
  }

  /**
   * {@inheritdoc}
   *
   * phpcs:ignore Drupal.Commenting.FunctionComment.VoidReturn
   * @return void
   */
  public function setContext(SymfonyRequestContext $context) {
    $this->urlGenerator->setContext($context);
  }

  /**
   * {@inheritdoc}
   */
  public function getContext(): SymfonyRequestContext {
    return $this->urlGenerator->getContext();
  }

  /**
   * {@inheritdoc}
   */
  public function getPathFromRoute($name, $parameters = []) {
    return $this->urlGenerator->getPathFromRoute($name, $parameters);
  }

  /**
   * Bubbles the bubbleable metadata to the current render context.
   *
   * @param \Drupal\Core\GeneratedUrl $generated_url
   *   The generated URL whose bubbleable metadata to bubble.
   * @param array $options
   *   (optional) The URL options. Defaults to none.
   */
  protected function bubble(GeneratedUrl $generated_url, array $options = []) {
    // Bubbling metadata makes sense only if the code is executed inside a
    // render context. All code running outside controllers has no render
    // context by default, so URLs used there are not supposed to affect the
    // response cacheability.
    if ($this->renderer->hasRenderContext()) {
      $build = [];
      $generated_url->applyTo($build);
      $this->renderer->render($build);
    }
  }

  /**
   * {@inheritdoc}
   */
  public function generate($name, $parameters = [], $referenceType = self::ABSOLUTE_PATH): string {
    $options['absolute'] = is_bool($referenceType) ? $referenceType : $referenceType === self::ABSOLUTE_URL;
    $generated_url = $this->generateFromRoute($name, $parameters, $options, TRUE);
    $this->bubble($generated_url);
    return $generated_url->getGeneratedUrl();
  }

  /**
   * {@inheritdoc}
   */
  public function generateFromRoute($name, $parameters = [], $options = [], $collect_bubbleable_metadata = FALSE) {
    $generated_url = $this->urlGenerator->generateFromRoute($name, $parameters, $options, TRUE);
    if (!$collect_bubbleable_metadata) {
      $this->bubble($generated_url, $options);
    }
    return $collect_bubbleable_metadata ? $generated_url : $generated_url->getGeneratedUrl();
  }

  /**
   * Checks if route name is a string or route object.
   *
   * @param string|\Symfony\Component\Routing\Route $name
   *   The route "name" which may also be an object or anything.
   *
   * @return bool
   *   TRUE if the passed in value a valid route, FALSE otherwise.
   *
   * @deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. Only string
   *   route names are supported.
   *
   * @see https://www.drupal.org/node/3172303
   */
  public function supports($name) {
    @trigger_error(__METHOD__ . '() is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. Only string route names are supported. See https://www.drupal.org/node/3172303', E_USER_DEPRECATED);
    return $this->urlGenerator->supports($name);
  }

  /**
   * Gets either the route name or a string based on the route object.
   *
   * @param string|\Symfony\Component\Routing\Route $name
   *   The route "name" which may also be an object or anything.
   * @param array $parameters
   *   Route parameters array.
   *
   * @return string
   *   Either the route name, or a string that uniquely identifies the route.
   *
   * @deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. Use
   *   the route name instead.
   *
   * @see https://www.drupal.org/node/3172303
   */
  public function getRouteDebugMessage($name, array $parameters = []) {
    @trigger_error(__METHOD__ . '() is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. Use the route name instead. See https://www.drupal.org/node/3172303', E_USER_DEPRECATED);
    return $this->urlGenerator->getRouteDebugMessage($name, $parameters);
  }

}