SearchPageAccessControlHandler.php

<?php

namespace Drupal\search;

use Drupal\Core\Access\AccessResult;
use Drupal\Core\Access\AccessibleInterface;
use Drupal\Core\Entity\EntityAccessControlHandler;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Session\AccountInterface;

/**
 * Defines the access control handler for the search page entity type.
 *
 * @see \Drupal\search\Entity\SearchPage
 */
class SearchPageAccessControlHandler extends EntityAccessControlHandler {
    
    /**
     * {@inheritdoc}
     */
    protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
        
        /** @var \Drupal\search\SearchPageInterface $entity */
        if (in_array($operation, [
            'delete',
            'disable',
        ])) {
            if ($entity->isDefaultSearch()) {
                return AccessResult::forbidden()->addCacheableDependency($entity);
            }
            else {
                return parent::checkAccess($entity, $operation, $account)->addCacheableDependency($entity);
            }
        }
        if ($operation == 'view') {
            if (!$entity->status()) {
                return AccessResult::forbidden()->addCacheableDependency($entity);
            }
            $plugin = $entity->getPlugin();
            if ($plugin instanceof AccessibleInterface) {
                return $plugin->access($operation, $account, TRUE)
                    ->addCacheableDependency($entity);
            }
            return AccessResult::allowed()->addCacheableDependency($entity);
        }
        return parent::checkAccess($entity, $operation, $account);
    }

}