class WorkspaceAccessControlHandler

class WorkspaceAccessControlHandler extends EntityAccessControlHandler {
    
    /**
     * {@inheritdoc}
     */
    protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
        
        /** @var \Drupal\workspaces\WorkspaceInterface $entity */
        if ($operation === 'publish' && $entity->hasParent()) {
            $message = $this->t('Only top-level workspaces can be published.');
            return AccessResult::forbidden((string) $message)->addCacheableDependency($entity);
        }
        if ($account->hasPermission('administer workspaces')) {
            return AccessResult::allowed()->cachePerPermissions();
        }
        // @todo Consider adding explicit "publish any|own workspace" permissions in
        //   https://www.drupal.org/project/drupal/issues/3084260.
        $permission_operation = $operation === 'update' || $operation === 'publish' ? 'edit' : $operation;
        // Check if the user has permission to access all workspaces.
        $access_result = AccessResult::allowedIfHasPermission($account, $permission_operation . ' any workspace');
        // Check if it's their own workspace, and they have permission to access
        // their own workspace.
        if ($access_result->isNeutral() && $account->isAuthenticated() && $account->id() === $entity->getOwnerId()) {
            $access_result = AccessResult::allowedIfHasPermission($account, $permission_operation . ' own workspace')->cachePerUser()
                ->addCacheableDependency($entity);
        }
        return $access_result;
    }
    
    /**
     * {@inheritdoc}
     */
    protected function checkCreateAccess(AccountInterface $account, array $context, $entity_bundle = NULL) {
        return AccessResult::allowedIfHasPermissions($account, [
            'administer workspaces',
            'create workspace',
        ], 'OR');
    }

}