EntityDeleteMultipleAccessCheck.php

<?php

namespace Drupal\Core\Entity;

use Drupal\Core\Access\AccessResult;
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 delete access to the items of the tempstore.
 */
class EntityDeleteMultipleAccessCheck implements AccessInterface {
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The tempstore service.
     *
     * @var \Drupal\Core\TempStore\PrivateTempStore
     */
    protected $tempStore;
    
    /**
     * Request stack service.
     *
     * @var \Symfony\Component\HttpFoundation\RequestStack
     */
    protected $requestStack;
    
    /**
     * Constructs a new EntityDeleteMultipleAccessCheck.
     *
     * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
     *   The entity type manager.
     * @param \Drupal\Core\TempStore\PrivateTempStoreFactory $temp_store_factory
     *   The tempstore factory 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->tempStore = $temp_store_factory->get('entity_delete_multiple_confirm');
        $this->requestStack = $request_stack;
    }
    
    /**
     * Checks if the user has delete 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.
     *
     * @return \Drupal\Core\Access\AccessResult
     *   Allowed or forbidden, neutral if tempstore is empty.
     */
    public function access(AccountInterface $account, $entity_type_id) {
        $selection = $this->tempStore
            ->get($account->id() . ':' . $entity_type_id);
        if (empty($selection) || !is_array($selection)) {
            return AccessResult::neutral();
        }
        $entities = $this->entityTypeManager
            ->getStorage($entity_type_id)
            ->loadMultiple(array_keys($selection));
        foreach ($entities as $entity) {
            // As long as the user has access to delete one entity allow access to the
            // delete form. Access will be checked again in
            // Drupal\Core\Entity\Form\DeleteMultipleForm::submit() in case it has
            // changed in the meantime.
            if ($entity->access('delete', $account)) {
                return AccessResult::allowed();
            }
        }
        return AccessResult::forbidden();
    }

}