class UserRolesCacheContext in Drupal 8

Defines the UserRolesCacheContext service, for "per role" caching.

Only use this cache context when checking explicitly for certain roles. Use user.permissions for anything that checks permissions.

Cache context ID: 'user.roles' (to vary by all roles of the current user). Calculated cache context ID: 'user.roles:%role', e.g. 'user.roles:anonymous' (to vary by the presence/absence of a specific role).

Hierarchy

• class \Drupal\Core\Cache\Context\UserCacheContextBase
  • class \Drupal\Core\Cache\Context\UserRolesCacheContext implements CalculatedCacheContextInterface

1 string reference to 'UserRolesCacheContext'

core.services.yml in core/core.services.yml

core/core.services.yml

1 service uses UserRolesCacheContext

cache_context.user.roles in core/core.services.yml

Drupal\Core\Cache\Context\UserRolesCacheContext

File

core/lib/Drupal/Core/Cache/Context/UserRolesCacheContext.php, line 17

Namespace

Drupal\Core\Cache\Context

class UserRolesCacheContext extends UserCacheContextBase implements CalculatedCacheContextInterface {

  /**
   * {@inheritdoc}
   */
  public static function getLabel() {
    return t("User's roles");
  }

  /**
   * {@inheritdoc}
   */
  public function getContext($role = NULL) {

    // User 1 does not actually have any special behavior for roles; this is
    // added as additional security and backwards compatibility protection for
    // SA-CORE-2015-002.
    // @todo Remove in Drupal 9.0.0.
    if ($this->user
      ->id() == 1) {
      return 'is-super-user';
    }
    if ($role === NULL) {
      return implode(',', $this->user
        ->getRoles());
    }
    else {
      return in_array($role, $this->user
        ->getRoles()) ? '0' : '1';
    }
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheableMetadata($role = NULL) {
    return (new CacheableMetadata())
      ->setCacheTags([
      'user:' . $this->user
        ->id(),
    ]);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
UserCacheContextBase::$user	protected	property	The account object.
UserCacheContextBase::__construct	public	function	Constructs a new UserCacheContextBase class.	1
UserRolesCacheContext::getCacheableMetadata	public	function	Gets the cacheability metadata for the context based on the parameter value. Overrides CalculatedCacheContextInterface::getCacheableMetadata
UserRolesCacheContext::getContext	public	function	Returns the string representation of the cache context. Overrides CalculatedCacheContextInterface::getContext
UserRolesCacheContext::getLabel	public static	function	Returns the label of the cache context. Overrides CalculatedCacheContextInterface::getLabel