public function IsGroupMemberCacheContext::getCacheableMetadata in Group 8

Same name and namespace in other branches

1. 2.0.x src/Cache/Context/IsGroupMemberCacheContext.php \Drupal\group\Cache\Context\IsGroupMemberCacheContext::getCacheableMetadata()

Gets the cacheability metadata for the context based on the parameter value.

There are three valid cases for the returned CacheableMetadata object:

• An empty object means this can be optimized away safely.
• A max-age of 0 means that this context can never be optimized away. It will never bubble up and cache tags will not be used.
• Any non-zero max-age and cache tags will bubble up into the cache item if this is optimized away to allow for invalidation if the context value changes.

Parameters

string|null $parameter: The parameter, or NULL to indicate all possible parameter values.

Return value

\Drupal\Core\Cache\CacheableMetadata A cacheable metadata object.

Throws

\LogicException Thrown if the passed in parameter is invalid.

Overrides CalculatedCacheContextInterface::getCacheableMetadata

File

src/Cache/Context/IsGroupMemberCacheContext.php, line 97

Class

IsGroupMemberCacheContext

Defines a cache context for "is a group member or not" caching.

Namespace

Drupal\group\Cache\Context

Code

public function getCacheableMetadata($group_id = NULL) {
  if (!$group_id) {
    throw new \LogicException('No group ID provided for user.is_group_member cache context.');
  }

  // The value of this context is affected when the user joins or leaves the
  // group. Both of which trigger a user save, so we can simply add the user's
  // cacheable metadata here.
  return CacheableMetadata::createFromObject($this->currentUser
    ->getAccount());
}