IsSuperUserCacheContext.php

<?php

namespace Drupal\Core\Cache\Context;

use Drupal\Core\Cache\CacheableMetadata;

/**
 * Defines the IsSuperUserCacheContext service, for "super user or not" caching.
 *
 * Cache context ID: 'user.is_super_user'.
 */
class IsSuperUserCacheContext extends UserCacheContextBase implements CacheContextInterface {
  
  /**
   * {@inheritdoc}
   */
  public static function getLabel() {
    return t('Is super user');
  }
  
  /**
   * {@inheritdoc}
   */
  public function getContext() {
    return (int) $this->user
      ->id() === 1 ? '1' : '0';
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCacheableMetadata() {
    return new CacheableMetadata();
  }

}