Remove boilerplate code from SocialAuthSettingsForm implementation.

src/Form/PbsAuthSettingsForm.php

@@ -2,57 +2,15 @@
 
 namespace Drupal\social_auth_pbs\Form;
 
-use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\Form\FormStateInterface;
-use Drupal\Core\Path\PathValidatorInterface;
-use Drupal\Core\Routing\RequestContext;
-use Drupal\Core\Routing\RouteProviderInterface;
+use Drupal\Core\Url;
 use Drupal\social_auth\Form\SocialAuthSettingsForm;
-use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Settings form for Social Auth PBS.
  */
 class PbsAuthSettingsForm extends SocialAuthSettingsForm {
 
-  /**
-   * The request context.
-   *
-   * @var \Drupal\Core\Routing\RequestContext
-   */
-  protected $requestContext;
-
-  /**
-   * Constructor.
-   *
-   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
-   *   The configuration factory.
-   * @param \Drupal\Core\Routing\RouteProviderInterface $route_provider
-   *   Used to check if route exists.
-   * @param \Drupal\Core\Path\PathValidatorInterface $path_validator
-   *   Used to check if path is valid and exists.
-   * @param \Drupal\Core\Routing\RequestContext $request_context
-   *   Holds information about the current request.
-   */
-  public function __construct(ConfigFactoryInterface $config_factory, RouteProviderInterface $route_provider, PathValidatorInterface $path_validator, RequestContext $request_context) {
-    parent::__construct($config_factory, $route_provider, $path_validator);
-    $this->requestContext = $request_context;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public static function create(ContainerInterface $container) {
-    // Instantiates this class.
-    return new static(
-    // Load the services required to construct this class.
-      $container->get('config.factory'),
-      $container->get('router.route_provider'),
-      $container->get('path.validator'),
-      $container->get('router.request_context')
-    );
-  }
-
   /**
    * {@inheritdoc}
    */
@@ -123,7 +81,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#type' => 'html_tag',
       '#tag' => 'p',
       '#value' => $this->t('<strong>Callback URL</strong><br/><code>@url</code>', [
-        '@url' => $GLOBALS['base_url'] . '/user/login/pbs/callback',
+        '@url' => Url::fromRoute('social_auth_pbs.callback')->setAbsolute()->toString(),
       ]),
     ];