class ConfigTranslationController

class ConfigTranslationController extends ControllerBase {

  /**
   * The configuration mapper manager.
   *
   * @var \Drupal\config_translation\ConfigMapperManagerInterface
   */
  protected $configMapperManager;

  /**
   * The menu link access service.
   *
   * @var \Drupal\Core\Access\AccessManagerInterface
   */
  protected $accessManager;

  /**
   * The dynamic router service.
   *
   * @var \Symfony\Component\Routing\Matcher\RequestMatcherInterface
   */
  protected $router;

  /**
   * The path processor service.
   *
   * @var \Drupal\Core\PathProcessor\InboundPathProcessorInterface
   */
  protected $pathProcessor;

  /**
   * The current user.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $account;

  /**
   * The language manager.
   *
   * @var \Drupal\Core\Language\LanguageManagerInterface
   */
  protected $languageManager;

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

  /**
   * Constructs a ConfigTranslationController.
   *
   * @param \Drupal\config_translation\ConfigMapperManagerInterface $config_mapper_manager
   *   The configuration mapper manager.
   * @param \Drupal\Core\Access\AccessManagerInterface $access_manager
   *   The menu link access service.
   * @param \Symfony\Component\Routing\Matcher\RequestMatcherInterface $router
   *   The dynamic router service.
   * @param \Drupal\Core\PathProcessor\InboundPathProcessorInterface $path_processor
   *   The inbound path processor.
   * @param \Drupal\Core\Session\AccountInterface $account
   *   The current user.
   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
   *   The language manager.
   * @param \Drupal\Core\Render\RendererInterface $renderer
   *   The renderer.
   */
  public function __construct(ConfigMapperManagerInterface $config_mapper_manager, AccessManagerInterface $access_manager, RequestMatcherInterface $router, InboundPathProcessorInterface $path_processor, AccountInterface $account, LanguageManagerInterface $language_manager, RendererInterface $renderer) {
    $this->configMapperManager = $config_mapper_manager;
    $this->accessManager = $access_manager;
    $this->router = $router;
    $this->pathProcessor = $path_processor;
    $this->account = $account;
    $this->languageManager = $language_manager;
    $this->renderer = $renderer;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('plugin.manager.config_translation.mapper'), $container
      ->get('access_manager'), $container
      ->get('router'), $container
      ->get('path_processor_manager'), $container
      ->get('current_user'), $container
      ->get('language_manager'), $container
      ->get('renderer'));
  }

  /**
   * Language translations overview page for a configuration name.
   *
   * @param \Symfony\Component\HttpFoundation\Request $request
   *   Page request object.
   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
   *   The route match.
   * @param string $plugin_id
   *   The plugin ID of the mapper.
   *
   * @return array
   *   Page render array.
   */
  public function itemPage(Request $request, RouteMatchInterface $route_match, $plugin_id) {

    /** @var \Drupal\config_translation\ConfigMapperInterface $mapper */
    $mapper = $this->configMapperManager
      ->createInstance($plugin_id);
    $mapper
      ->populateFromRouteMatch($route_match);
    $page = [];
    $page['#title'] = $this
      ->t('Translations for %label', [
      '%label' => $mapper
        ->getTitle(),
    ]);
    $languages = $this->languageManager
      ->getLanguages();
    if (count($languages) == 1) {
      $this
        ->messenger()
        ->addWarning($this
        ->t('In order to translate configuration, the website must have at least two <a href=":url">languages</a>.', [
        ':url' => Url::fromRoute('entity.configurable_language.collection')
          ->toString(),
      ]));
    }
    try {
      $original_langcode = $mapper
        ->getLangcode();
      $operations_access = TRUE;
    } catch (ConfigMapperLanguageException $exception) {
      $items = [];
      foreach ($mapper
        ->getConfigNames() as $config_name) {
        $langcode = $mapper
          ->getLangcodeFromConfig($config_name);
        $items[] = $this
          ->t('@name: @langcode', [
          '@name' => $config_name,
          '@langcode' => $langcode,
        ]);
      }
      $message = [
        'message' => [
          '#markup' => $this
            ->t('The configuration objects have different language codes so they cannot be translated:'),
        ],
        'items' => [
          '#theme' => 'item_list',
          '#items' => $items,
        ],
      ];
      $this
        ->messenger()
        ->addWarning($this->renderer
        ->renderInIsolation($message));
      $original_langcode = LanguageInterface::LANGCODE_NOT_SPECIFIED;
      $operations_access = FALSE;
    }
    if (!isset($languages[$original_langcode])) {

      // If the language is not configured on the site, create a dummy language
      // object for this listing only to ensure the user gets useful info.
      $language_name = $this->languageManager
        ->getLanguageName($original_langcode);
      $languages[$original_langcode] = new Language([
        'id' => $original_langcode,
        'name' => $language_name,
      ]);
    }

    // We create a fake request object to pass into
    // ConfigMapperInterface::populateFromRouteMatch() for the different languages.
    // Creating a separate request for each language and route is neither easily
    // possible nor performant.
    $fake_request = $request
      ->duplicate();
    $page['languages'] = [
      '#type' => 'table',
      '#header' => [
        $this
          ->t('Language'),
        $this
          ->t('Operations'),
      ],
    ];
    foreach ($languages as $language) {
      $langcode = $language
        ->getId();

      // This is needed because
      // ConfigMapperInterface::getAddRouteParameters(), for example,
      // needs to return the correct language code for each table row.
      $fake_route_match = RouteMatch::createFromRequest($fake_request);
      $mapper
        ->populateFromRouteMatch($fake_route_match);
      $mapper
        ->setLangcode($langcode);

      // Prepare the language name and the operations depending on whether this
      // is the original language or not.
      if ($langcode == $original_langcode) {
        $language_name = '<strong>' . $this
          ->t('@language (original)', [
          '@language' => $language
            ->getName(),
        ]) . '</strong>';

        // Check access for the path/route for editing, so we can decide to
        // include a link to edit or not.
        $edit_access = $this->accessManager
          ->checkNamedRoute($mapper
          ->getBaseRouteName(), $route_match
          ->getRawParameters()
          ->all(), $this->account);

        // Build list of operations.
        $operations = [];
        if ($edit_access) {
          $operations['edit'] = [
            'title' => $this
              ->t('Edit'),
            'url' => Url::fromRoute($mapper
              ->getBaseRouteName(), $mapper
              ->getBaseRouteParameters(), [
              'query' => [
                'destination' => $mapper
                  ->getOverviewPath(),
              ],
            ]),
          ];
        }
      }
      else {
        $language_name = $language
          ->getName();
        $operations = [];

        // If no translation exists for this language, link to add one.
        if (!$mapper
          ->hasTranslation($language)) {
          $operations['add'] = [
            'title' => $this
              ->t('Add'),
            'url' => Url::fromRoute($mapper
              ->getAddRouteName(), $mapper
              ->getAddRouteParameters()),
            'attributes' => [
              'class' => [
                'use-ajax',
              ],
              'data-dialog-type' => 'modal',
              'data-dialog-options' => Json::encode([
                'width' => 880,
              ]),
            ],
          ];
        }
        else {

          // Otherwise, link to edit the existing translation.
          $operations['edit'] = [
            'title' => $this
              ->t('Edit'),
            'url' => Url::fromRoute($mapper
              ->getEditRouteName(), $mapper
              ->getEditRouteParameters()),
            'attributes' => [
              'class' => [
                'use-ajax',
              ],
              'data-dialog-type' => 'modal',
              'data-dialog-options' => Json::encode([
                'width' => 880,
              ]),
            ],
          ];
          $operations['delete'] = [
            'title' => $this
              ->t('Delete'),
            'url' => Url::fromRoute($mapper
              ->getDeleteRouteName(), $mapper
              ->getDeleteRouteParameters()),
            'attributes' => [
              'class' => [
                'use-ajax',
              ],
              'data-dialog-type' => 'modal',
              'data-dialog-options' => Json::encode([
                'width' => 880,
              ]),
            ],
          ];
        }
      }
      $page['languages'][$langcode]['language'] = [
        '#markup' => $language_name,
      ];
      $page['languages'][$langcode]['operations'] = [
        '#type' => 'operations',
        '#links' => $operations,
        // Even if the mapper contains multiple language codes, the source
        // configuration can still be edited.
        '#access' => $langcode == $original_langcode || $operations_access,
        '#attached' => [
          'library' => [
            'core/drupal.dialog.ajax',
          ],
        ],
      ];
    }
    return $page;
  }

}