language siwtchers links are working now (reloading the whole site but with the right url)

sites/all/modules/figli/edlp_agenda/src/Controller/AgendaController.php

@@ -4,7 +4,9 @@ namespace Drupal\edlp_agenda\Controller;
 
 use Drupal\Core\Controller\ControllerBase;
 use Drupal\Core\Datetime\DrupalDateTime;
-use Symfony\Component\HttpFoundation\JsonResponse;
+use Drupal\Core\Url;
+use Drupal\Core\Language\LanguageInterface;
+// use Symfony\Component\HttpFoundation\JsonResponse;
 use Drupal\Core\Cache\CacheableJsonResponse;
 use Drupal\Core\Cache\CacheableMetadata;
 use Drupal\core\render\RenderContext;
@@ -80,6 +82,23 @@ class AgendaController extends ControllerBase {
       'rendered'=> $rendered
     ];
 
+    // translations links
+    // use Drupal\Core\Url;
+    // use Drupal\Core\Language\LanguageInterface;
+    $route_name = 'edlp_agenda.agenda';
+    $links = \Drupal::languageManager()->getLanguageSwitchLinks(LanguageInterface::TYPE_URL, Url::fromRoute($route_name));
+    if (isset($links->links)) {
+      $translations_build = [
+        '#theme' => 'links__language_block',
+        '#links' => $links->links,
+        '#attributes' => ['class' => ["language-switcher-{$links->method_id}",],],
+        '#set_active_class' => TRUE,
+      ];
+      $translations_rendered = \Drupal::service('renderer')->executeInRenderContext(new RenderContext(), function () use ($translations_build) {return render($translations_build);});
+
+      $data['translations_links'] = $translations_rendered;
+    }
+
     $data['#cache'] = [
       'max-age' => \Drupal\Core\Cache\Cache::PERMANENT,
       'tags' => ['edlp-agenda-cache']