fix(MenuLinkUrl): Handle translation of URls

src/Plugin/GraphQL/DataProducer/Menu/MenuLink/MenuLinkUrl.php

@@ -1,40 +1,85 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Drupal\graphql\Plugin\GraphQL\DataProducer\Menu\MenuLink;
 
+use Drupal\Core\DependencyInjection\DependencySerializationTrait;
+use Drupal\Core\Language\LanguageManagerInterface;
 use Drupal\Core\Menu\MenuLinkInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\Plugin\Context\ContextDefinition;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+use Drupal\Core\Url;
+use Drupal\graphql\Attribute\DataProducer;
+use Drupal\graphql\GraphQL\Execution\FieldContext;
 use Drupal\graphql\Plugin\GraphQL\DataProducer\DataProducerPluginBase;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Returns the URL object of a menu link.
  *
  * @todo Fix input and output context type.
- *
- * @DataProducer(
- *   id = "menu_link_url",
- *   name = @Translation("Menu link url"),
- *   description = @Translation("Returns the URL of a menu link."),
- *   produces = @ContextDefinition("any",
- *     label = @Translation("URL")
- *   ),
- *   consumes = {
- *     "link" = @ContextDefinition("any",
- *       label = @Translation("Menu link")
- *     )
- *   }
- * )
  */
-class MenuLinkUrl extends DataProducerPluginBase {
+#[DataProducer(
+  id: 'menu_link_url',
+  name: new TranslatableMarkup('Menu link url'),
+  description: new TranslatableMarkup('Returns the URL of a menu link.'),
+  produces: new ContextDefinition(
+    data_type: 'any',
+    label: new TranslatableMarkup('URL'),
+  ),
+  consumes: [
+    'link' => new ContextDefinition(
+      data_type: 'any',
+      label: new TranslatableMarkup('Menu link'),
+    ),
+  ],
+)]
+class MenuLinkUrl extends DataProducerPluginBase implements ContainerFactoryPluginInterface {
+  use DependencySerializationTrait;
 
   /**
-   * Resolver.
-   *
-   * @param \Drupal\Core\Menu\MenuLinkInterface $link
+   * The language manager service.
+   */
+  protected LanguageManagerInterface $languageManager;
+
+  /**
+   * {@inheritdoc}
    *
-   * @return \Drupal\Core\Url
+   * @codeCoverageIgnore
+   */
+  public static function create(ContainerInterface $container, array $configuration, $pluginId, $pluginDefinition) {
+    return new static(
+      $configuration,
+      $pluginId,
+      $pluginDefinition,
+      $container->get('language_manager')
+    );
+  }
+
+  /**
+   * MenuLinkUrl constructor.
    */
-  public function resolve(MenuLinkInterface $link) {
-    return $link->getUrlObject();
+  public function __construct(array $configuration, string $pluginId, array $pluginDefinition, LanguageManagerInterface $languageManager) {
+    parent::__construct($configuration, $pluginId, $pluginDefinition);
+    $this->languageManager = $languageManager;
+  }
+
+  /**
+   * Resolver.
+   */
+  public function resolve(MenuLinkInterface $link, FieldContext $context): Url {
+    $url = $link->getUrlObject();
+
+    if ($langcode = $context->getContextLanguage()) {
+      if ($language = $this->languageManager->getLanguage($langcode)) {
+        $url->setOption('language', $language);
+      }
+      $context->addCacheContexts(['languages:language_url']);
+    }
+
+    return $url;
   }
 
 }