Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\user\ContextProvider;
Chris@0: 
Chris@0: use Drupal\Core\Cache\CacheableMetadata;
Chris@18: use Drupal\Core\Entity\EntityTypeManagerInterface;
Chris@0: use Drupal\Core\Plugin\Context\ContextProviderInterface;
Chris@17: use Drupal\Core\Plugin\Context\EntityContext;
Chris@0: use Drupal\Core\Session\AccountInterface;
Chris@0: use Drupal\Core\StringTranslation\StringTranslationTrait;
Chris@0: 
Chris@0: /**
Chris@0:  * Sets the current user as a context.
Chris@0:  */
Chris@0: class CurrentUserContext implements ContextProviderInterface {
Chris@0: 
Chris@0:   use StringTranslationTrait;
Chris@0: 
Chris@0:   /**
Chris@0:    * The current user.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Session\AccountInterface
Chris@0:    */
Chris@0:   protected $account;
Chris@0: 
Chris@0:   /**
Chris@0:    * The user storage.
Chris@0:    *
Chris@0:    * @var \Drupal\user\UserStorageInterface
Chris@0:    */
Chris@0:   protected $userStorage;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a new CurrentUserContext.
Chris@0:    *
Chris@0:    * @param \Drupal\Core\Session\AccountInterface $account
Chris@0:    *   The current user.
Chris@18:    * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
Chris@18:    *   The entity type manager.
Chris@0:    */
Chris@18:   public function __construct(AccountInterface $account, EntityTypeManagerInterface $entity_type_manager) {
Chris@0:     $this->account = $account;
Chris@18:     $this->userStorage = $entity_type_manager->getStorage('user');
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getRuntimeContexts(array $unqualified_context_ids) {
Chris@0:     $current_user = $this->userStorage->load($this->account->id());
Chris@0: 
Chris@14:     if ($current_user) {
Chris@14:       // @todo Do not validate protected fields to avoid bug in TypedData,
Chris@14:       //   remove this in https://www.drupal.org/project/drupal/issues/2934192.
Chris@14:       $current_user->_skipProtectedUserFieldConstraint = TRUE;
Chris@18: 
Chris@18:       $context = EntityContext::fromEntity($current_user, $this->t('Current user'));
Chris@18:     }
Chris@18:     else {
Chris@18:       // If not user is available, provide an empty context object.
Chris@18:       $context = EntityContext::fromEntityTypeId('user', $this->t('Current user'));
Chris@14:     }
Chris@14: 
Chris@0:     $cacheability = new CacheableMetadata();
Chris@0:     $cacheability->setCacheContexts(['user']);
Chris@0:     $context->addCacheableDependency($cacheability);
Chris@0: 
Chris@0:     $result = [
Chris@0:       'current_user' => $context,
Chris@0:     ];
Chris@0: 
Chris@0:     return $result;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getAvailableContexts() {
Chris@0:     return $this->getRuntimeContexts([]);
Chris@0:   }
Chris@0: 
Chris@0: }