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<?php
namespace Drupal\user\ContextProvider;
use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Entity\EntityTypeManagerInterface;
use Drupal\Core\Plugin\Context\ContextProviderInterface;
use Drupal\Core\Plugin\Context\EntityContext;
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\StringTranslation\StringTranslationTrait;
/**
* Sets the current user as a context.
*/
class CurrentUserContext implements ContextProviderInterface {
use StringTranslationTrait;
/**
* The current user.
*
* @var \Drupal\Core\Session\AccountInterface
*/
protected $account;
/**
* The user storage.
*
* @var \Drupal\user\UserStorageInterface
*/
protected $userStorage;
/**
* Constructs a new CurrentUserContext.
*
* @param \Drupal\Core\Session\AccountInterface $account
* The current user.
* @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
* The entity type manager.
*/
public function __construct(AccountInterface $account, EntityTypeManagerInterface $entity_type_manager) {
$this->account = $account;
$this->userStorage = $entity_type_manager->getStorage('user');
}
/**
* {@inheritdoc}
*/
public function getRuntimeContexts(array $unqualified_context_ids) {
$current_user = $this->userStorage->load($this->account->id());
if ($current_user) {
// @todo Do not validate protected fields to avoid bug in TypedData,
// remove this in https://www.drupal.org/project/drupal/issues/2934192.
$current_user->_skipProtectedUserFieldConstraint = TRUE;
$context = EntityContext::fromEntity($current_user, $this->t('Current user'));
}
else {
// If not user is available, provide an empty context object.
$context = EntityContext::fromEntityTypeId('user', $this->t('Current user'));
}
$cacheability = new CacheableMetadata();
$cacheability->setCacheContexts(['user']);
$context->addCacheableDependency($cacheability);
$result = [
'current_user' => $context,
];
return $result;
}
/**
* {@inheritdoc}
*/
public function getAvailableContexts() {
return $this->getRuntimeContexts([]);
}
}
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