cloud-8.x-2.0-beta1/modules/cloud_service_providers/aws_cloud/src/Entity/EntityOperateMultipleAccessCheck.php

<?php

namespace Drupal\aws_cloud\Entity;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Routing\Access\AccessInterface;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\TempStore\PrivateTempStoreFactory;
use Symfony\Component\HttpFoundation\RequestStack;

/**
 * Checks if the current user has operate access to the items of the tempstore.
 */
class EntityOperateMultipleAccessCheck implements AccessInterface {

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

  /**
   * Request stack service.
   *
   * @var \Symfony\Component\HttpFoundation\RequestStack
   */
  protected $requestStack;

  /**
   * Constructs a new EntityOperateMultipleAccessCheck.
   *
   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
   *   The entity type manager.
   * @param \Drupal\Core\TempStore\PrivateTempStoreFactory $temp_store_factory
   *   The tempstore service.
   * @param \Symfony\Component\HttpFoundation\RequestStack $request_stack
   *   The request stack service.
   */
  public function __construct(
    EntityTypeManagerInterface $entity_type_manager,
    PrivateTempStoreFactory $temp_store_factory,
    RequestStack $request_stack
  ) {
    $this->entityTypeManager = $entity_type_manager;
    $this->tempStoreFactory = $temp_store_factory;
    $this->requestStack = $request_stack;
  }

  /**
   * Checks if the user has operate access for at least one item of the store.
   *
   * @param \Drupal\Core\Session\AccountInterface $account
   *   Run access checks for this account.
   * @param string $entity_type_id
   *   Entity type ID.
   * @param string $operation
   *   Operation.
   *
   * @return \Drupal\Core\Access\AccessResult
   *   Allowed or forbidden, neutral if tempstore is empty.
   */
  public function access(AccountInterface $account, $entity_type_id, $operation) {
    if (!$this->requestStack->getCurrentRequest()->hasSession()) {
      return AccessResult::neutral();
    }

    $tempStoreKey = $account->id() . ':' . $entity_type_id;
    $selection = $this->tempStoreFactory
      ->get($tempStoreKey)
      ->get($tempStoreKey);

    if (empty($selection) || !is_array($selection)) {
      return AccessResult::neutral();
    }

    $entities = $this->entityTypeManager
      ->getStorage($entity_type_id)
      ->loadMultiple(array_keys($selection));
    foreach ($entities as $entity) {
      // As long as the user has access to operate one entity allow
      // access to the operate form.
      if ($entity->access($operation, $account)) {
        return AccessResult::allowed();
      }
    }
    return AccessResult::forbidden();
  }

}