function LanguageBlock::build

Overrides BlockPluginInterface::build

File

core/modules/language/src/Plugin/Block/LanguageBlock.php, line 86

Class

LanguageBlock

Provides a 'Language switcher' block.

Namespace

Code

public function build() {
    $build = [];
    $type = $this->getDerivativeId();
    $route_match = \Drupal::routeMatch();
    // If there is no route match, for example when creating blocks on 404 pages
    // for logged-in users with big_pipe enabled using the front page instead.
    if ($this->pathMatcher
        ->isFrontPage() || !$route_match->getRouteObject()) {
        // We are skipping the route match on both 404 and front page.
        // Example: If on front page, there is no route match like when creating
        // blocks on 404 pages for logged-in users with big_pipe enabled, use the
        // front page.
        $url = Url::fromRoute('<front>');
    }
    else {
        $url = Url::fromRouteMatch($route_match);
    }
    $links = $this->languageManager
        ->getLanguageSwitchLinks($type, $url);
    if (isset($links->links)) {
        $build = [
            '#theme' => 'links__language_block',
            '#links' => $links->links,
            '#attributes' => [
                'class' => [
                    "language-switcher-{$links->method_id}",
                ],
            ],
            '#set_active_class' => TRUE,
        ];
    }
    return $build;
}