/**
* {@inheritdoc}
*/
public function validateForm(array &$form, FormStateInterface $form_state)
{
parent::validateForm($form, $form_state);
$collection = Rdf::load($form_state->getValue('collection_id'));
// Only authenticated users can join a collection.
/** @var \Drupal\user\UserInterface $user */
$user = User::load($form_state->getValue('user_id'));
if ($user->isAnonymous()) {
$form_state->setErrorByName('user', $this->t('<a href=":login">Log in</a> or <a href=":register">register</a> to change your group membership.', [':login' => Url::fromRoute('user.login'), ':register' => Url::fromRoute('user.register')]));
}
// Check if the user is already a member of the collection.
if (Og::isMember($collection, $user)) {
$form_state->setErrorByName('collection', $this->t('You already are a member of this collection.'));
}
}
/**
* Access check for the LeaveCollectionConfirmForm.
*
* @param \Drupal\rdf_entity\RdfInterface $rdf_entity
* The collection that is on the verge of losing a member.
*
* @return \Drupal\Core\Access\AccessResult
* The access result object.
*/
public static function access(RdfInterface $rdf_entity)
{
/** @var \Drupal\Core\Session\AccountProxyInterface $account_proxy */
$account_proxy = \Drupal::service('current_user');
// Deny access if the user is not logged in.
if ($account_proxy->isAnonymous()) {
return AccessResult::forbidden();
}
// Only allow access if the current user is a member of the collection.
$user = User::load($account_proxy->id());
return AccessResult::allowedIf(Og::isMember($rdf_entity, $user));
}
