EntityController::addPage

public EntityController::addPage($entity_type_id)

public function addPage($entity_type_id) {
  $entity_type = $this->entityTypeManager->getDefinition($entity_type_id);
  $bundles = $this->entityTypeBundleInfo->getBundleInfo($entity_type_id);
  $bundle_key = $entity_type->getKey('bundle');
  $bundle_entity_type_id = $entity_type->getBundleEntityType();
  $build = [
    '#theme' => 'entity_add_list',
    '#bundles' => [],
  ];
  if ($bundle_entity_type_id) {
    $bundle_argument = $bundle_entity_type_id;
    $bundle_entity_type = $this->entityTypeManager->getDefinition($bundle_entity_type_id);
    $bundle_entity_type_label = $bundle_entity_type->getLowercaseLabel();
    $build['#cache']['tags'] = $bundle_entity_type->getListCacheTags();

    // Build the message shown when there are no bundles.
    $link_text = $this->t('Add a new @entity_type.', ['@entity_type' => $bundle_entity_type_label]);
    $link_route_name = 'entity.' . $bundle_entity_type->id() . '.add_form';
    $build['#add_bundle_message'] = $this->t('There is no @entity_type yet. @add_link', [
      '@entity_type' => $bundle_entity_type_label,
      '@add_link' => Link::createFromRoute($link_text, $link_route_name)->toString(),
    ]);
    // Filter out the bundles the user doesn't have access to.
    $access_control_handler = $this->entityTypeManager->getAccessControlHandler($entity_type_id);
    foreach ($bundles as $bundle_name => $bundle_info) {
      $access = $access_control_handler->createAccess($bundle_name, NULL, [], TRUE);
      if (!$access->isAllowed()) {
        unset($bundles[$bundle_name]);
      }
      $this->renderer->addCacheableDependency($build, $access);
    }
    // Add descriptions from the bundle entities.
    $bundles = $this->loadBundleDescriptions($bundles, $bundle_entity_type);
  }
  else {
    $bundle_argument = $bundle_key;
  }

  $form_route_name = 'entity.' . $entity_type_id . '.add_form';
  // Redirect if there's only one bundle available.
  if (count($bundles) == 1) {
    $bundle_names = array_keys($bundles);
    $bundle_name = reset($bundle_names);
    return $this->redirect($form_route_name, [$bundle_argument => $bundle_name]);
  }
  // Prepare the #bundles array for the template.
  foreach ($bundles as $bundle_name => $bundle_info) {
    $build['#bundles'][$bundle_name] = [
      'label' => $bundle_info['label'],
      'description' => isset($bundle_info['description']) ? $bundle_info['description'] : '',
      'add_link' => Link::createFromRoute($bundle_info['label'], $form_route_name, [$bundle_argument => $bundle_name]),
    ];
  }

  return $build;
}