public function NodeAccessGrantsCacheContext::getContext in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/node/src/Cache/NodeAccessGrantsCacheContext.php \Drupal\node\Cache\NodeAccessGrantsCacheContext::getContext()

Returns the string representation of the cache context.

A cache context service's name is used as a token (placeholder) cache key, and is then replaced with the string returned by this method.

Parameters

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

Return value

string The string representation of the cache context. When $parameter is NULL, a value representing all possible parameters must be generated.

Throws

\LogicException Thrown if the passed in parameter is invalid.

Overrides CalculatedCacheContextInterface::getContext

File

core/modules/node/src/Cache/NodeAccessGrantsCacheContext.php, line 33

Class

NodeAccessGrantsCacheContext

Defines the node access view cache context service.

Namespace

Drupal\node\Cache

Code

public function getContext($operation = NULL) {

  // If the current user either can bypass node access then we don't need to
  // determine the exact node grants for the current user.
  if ($this->user
    ->hasPermission('bypass node access')) {
    return 'all';
  }

  // When no specific operation is specified, check the grants for all three
  // possible operations.
  if ($operation === NULL) {
    $result = [];
    foreach ([
      'view',
      'update',
      'delete',
    ] as $op) {
      $result[] = $this
        ->checkNodeGrants($op);
    }
    return implode('-', $result);
  }
  else {
    return $this
      ->checkNodeGrants($operation);
  }
}