open_connect-8.x-1.x-dev/src/Plugin/Block/LoginBlock.php

<?php

namespace Drupal\open_connect\Plugin\Block;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Form\FormBuilderInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\open_connect\Form\LoginForm;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides an open connect login block.
 *
 * @Block(
 *   id = "open_connect_login",
 *   admin_label = @Translation("Open connect login"),
 *   category = @Translation("Open connect")
 * )
 */
class LoginBlock extends BlockBase implements ContainerFactoryPluginInterface {

  /**
   * The form builder.
   *
   * @var \Drupal\Core\Form\FormBuilderInterface
   */
  protected $formBuilder;

  /**
   * Constructs a new LoginBlock.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param string $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Form\FormBuilderInterface $form_builder
   *   The form builder.
   */
  public function __construct(
    array $configuration,
    $plugin_id,
    $plugin_definition,
    FormBuilderInterface $form_builder
  ) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->formBuilder = $form_builder;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static(
      $configuration,
      $plugin_id,
      $plugin_definition,
      $container->get('form_builder')
    );
  }

  /**
   * {@inheritdoc}
   */
  protected function blockAccess(AccountInterface $account) {
    // $route_name = $this->routeMatch->getRouteName();
    if ($account->isAnonymous()/* && !in_array($route_name, ['user.login', 'user.logout'])*/) {
      return AccessResult::allowed()
        ->addCacheContexts([
          // 'route.name',
          'user.roles:anonymous',
        ]);
    }
    return AccessResult::forbidden();
  }

  /**
   * {@inheritdoc}
   */
  public function build() {
    return $this->formBuilder->getForm(LoginForm::class);
  }

}