public function DropdownLanguage::build in Dropdown Language 8.3

Same name and namespace in other branches

1. 8 src/Plugin/Block/DropdownLanguage.php \Drupal\dropdown_language\Plugin\Block\DropdownLanguage::build()
2. 8.2 src/Plugin/Block/DropdownLanguage.php \Drupal\dropdown_language\Plugin\Block\DropdownLanguage::build()
3. 3.0.x src/Plugin/Block/DropdownLanguage.php \Drupal\dropdown_language\Plugin\Block\DropdownLanguage::build()

Builds and returns the renderable array for this block plugin.

If a block should not be rendered because it has no content, then this method must also ensure to return no content: it must then only return an empty array, or an empty array with #cache set (with cacheability metadata indicating the circumstances for it being empty).

Return value

array A renderable array representing the content of the block.

Overrides BlockPluginInterface::build

See also

\Drupal\block\BlockViewBuilder

File

src/Plugin/Block/DropdownLanguage.php, line 120

Class

DropdownLanguage

Provides an alternative language switcher block.

Namespace

Drupal\dropdown_language\Plugin\Block

Code

public function build() {
  $block = [];
  $build = [];
  $languages = $this->languageManager
    ->getLanguages();
  if (count($languages) > 1) {
    $derivative_id = $this
      ->getDerivativeId();
    $route = $this->pathMatcher
      ->isFrontPage() ? '<front>' : '<current>';
    $current_language = $this->languageManager
      ->getCurrentLanguage($derivative_id)
      ->getId();
    $links = $this->languageManager
      ->getLanguageSwitchLinks($derivative_id, Url::fromRoute($route))->links;

    // Place active language ontop of list.
    if (isset($links[$current_language])) {
      $links = [
        $current_language => $links[$current_language],
      ] + $links;

      // Set an active class for styling.
      $links[$current_language]['attributes']['class'][] = 'active-language';

      // Remove self-referencing link.
      $links[$current_language]['url'] = Url::fromRoute('<nolink>');
    }

    // Get block instance and general settings.
    $block_config = $this
      ->getConfiguration();
    $general_config = $this->configFactory
      ->get('dropdown_language.setting');
    $wrapper_default = $general_config
      ->get('wrapper');
    $display_language_id = $general_config
      ->get('display_language_id');
    $filter_untranslated = $general_config
      ->get('filter_untranslated');
    $always_show_block = $general_config
      ->get('always_show_block');

    // Only load once, rather than in switch (in a loop).
    $native_names = FALSE;
    if ($display_language_id == 2) {
      $native_names = $this->languageManager
        ->getStandardLanguageList();
    }

    /**
     * Discover the entity we are currently viewing.
     * Note:  page manager (and other) entities need routines. @v3 plugin.
     *
     * With mulitle param:
     *   a. items may be of any type.
     *   b. last object seems be ideal target object to use as 'self'.
     *
     **/
    $entity = FALSE;
    if ($filter_untranslated == '1') {
      $routedItems = $this->routeMatch;
      foreach ($routedItems
        ->getParameters() as $param) {
        if ($param instanceof EntityInterface) {
          $entity['EntityInterface'] = $param;
        }
      }
    }
    foreach ($links as $lid => $link) {

      // Re-label as per general setting.
      switch ($display_language_id) {
        case '1':
          $links[$lid]['title'] = mb_strtoupper($lid);
          break;
        case '2':
          $name = $link['language']
            ->getName();
          $links[$lid]['title'] = isset($native_names[$lid]) ? $native_names[$lid][1] : $name;
          if (isset($native_names[$lid]) && (isset($native_names[$lid]) && $native_names[$lid][1] != $name)) {
            $links[$lid]['attributes']['title'] = $name;
          }
          break;
        case '3':
          $links[$lid]['title'] = isset($block_config['labels'][$lid]) ? $block_config['labels'][$lid] : $link['language']
            ->getName();
          break;
      }

      // Removes unused languages from the dropdown. @v3
      if ($entity && $entity['EntityInterface'] && $filter_untranslated == '1') {
        $has_translation = method_exists($entity['EntityInterface'], 'getTranslationStatus') ? $entity['EntityInterface']
          ->getTranslationStatus($lid) : FALSE;
        $this_translation = $has_translation && method_exists($entity['EntityInterface'], 'getTranslation') ? $entity['EntityInterface']
          ->getTranslation($lid) : FALSE;
        $access_translation = $this_translation && method_exists($this_translation, 'access') && $this_translation
          ->access('view') ? TRUE : FALSE;
        if (!$this_translation || !$access_translation) {
          unset($links[$lid]);
        }
      }
    }
    $dropdown_button = [
      '#type' => 'dropbutton',
      '#subtype' => 'dropdown_language',
      '#links' => $links,
      '#attributes' => [
        'class' => [
          'dropdown-language-item',
        ],
      ],
      '#attached' => [
        'library' => [
          'dropdown_language/dropdown-language-selector',
        ],
      ],
    ];
    if ($wrapper_default == 1) {
      $block['switcher'] = [
        '#type' => 'fieldset',
        '#title' => $this
          ->t('Switch Language'),
      ];
      $block['switcher']['switch-language'] = $dropdown_button;
    }
    else {
      $block['switch-language'] = $dropdown_button;
    }
  }
  if (count($links) > 1 || $always_show_block) {
    $build['dropdown-language'] = $block;
  }
  return $build;
}