activitypub-1.0.x-dev/src/Plugin/Block/FollowBlock.php

<?php

namespace Drupal\activitypub\Plugin\Block;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Form\FormBuilderInterface;
use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Session\AccountInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides a block to display a Follow form.
 *
 * @Block(
 *   id = "activitypub_follow",
 *   admin_label = @Translation("ActivityPub Follow"),
 * )
 */
class FollowBlock extends BlockBase implements  ContainerFactoryPluginInterface {

  /**
   * The route match.
   *
   * @var \Drupal\Core\Routing\RouteMatchInterface
   */
  protected $routeMatch;

  /**
   * The entity type manager.
   *
   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
   */
  protected $entityTypeManager;

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

  /**
   * FollowBlock constructor
   *
   * @param array $configuration
   *   The plugin configuration, i.e. an array with configuration values keyed
   *   by configuration option name. The special key 'context' may be used to
   *   initialize the defined contexts by setting it to an array of context
   *   values keyed by context names.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
   *   The route match.
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\Form\FormBuilderInterface $form_builder
   *   The form builder.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, RouteMatchInterface $route_match, EntityTypeManagerInterface $entity_type_manager, FormBuilderInterface $form_builder) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->routeMatch = $route_match;
    $this->entityTypeManager = $entity_type_manager;
    $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('current_route_match'),
      $container->get('entity_type.manager'),
      $container->get('form_builder')
    );
  }

  /**
   * {@inheritdoc}
   */
  public function build() {
    $actor = $this->entityTypeManager->getStorage('activitypub_actor')->loadActorByEntityIdAndType($this->routeMatch->getRawParameter('user'), 'person');
    /** @noinspection PhpMethodParametersCountMismatchInspection */
    return ['form' => \Drupal::formBuilder()->getForm('Drupal\activitypub\Form\FollowForm', $actor)];
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheMaxAge() {
    return 0;
  }

  /**
   * {@inheritdoc}
   */
  protected function blockAccess(AccountInterface $account) {
    if ($this->routeMatch->getRouteName() == 'entity.user.canonical') {

      if ($this->entityTypeManager->getStorage('activitypub_actor')->loadActorByEntityIdAndType($this->routeMatch->getRawParameter('user'), 'person')) {
        return AccessResult::allowed();
      }

      return AccessResult::forbidden('No actor found for this user');
    }

    return AccessResult::forbidden('This block can only be rendered on the user profile page.');
  }

}