/**
* Change the view mode of an entity that is being displayed.
*
* @param string $view_mode
* The view_mode that is to be used to display the entity.
* @param \Drupal\Core\Entity\EntityInterface $entity
* The entity that is being viewed.
* @param array $context
* Array with additional context information, currently only contains the
* langcode the entity is viewed in.
*
* @ingroup entity_crud
*/
function hook_entity_view_mode_alter(&$view_mode, Drupal\Core\Entity\EntityInterface $entity, $context)
{
// For nodes, change the view mode when it is teaser.
if ($entity->getEntityTypeId() == 'node' && $view_mode == 'teaser') {
$view_mode = 'my_custom_view_mode';
}
}
/**
* Control download access to files.
*
* The hook is typically implemented to limit access based on the entity that
* references the file; for example, only users with access to a node should be
* allowed to download files attached to that node.
*
* @param $field
* The field to which the file belongs.
* @param \Drupal\Core\Entity\EntityInterface $entity
* The entity which references the file.
* @param \Drupal\file\FileInterface $file
* The file entity that is being requested.
*
* @return
* TRUE is access should be allowed by this entity or FALSE if denied. Note
* that denial may be overridden by another entity controller, making this
* grant permissive rather than restrictive.
*
* @see hook_entity_field_access().
*/
function hook_file_download_access($field, Drupal\Core\Entity\EntityInterface $entity, Drupal\file\FileInterface $file)
{
if ($entity->getEntityTypeId() == 'node') {
return $entity->access('view');
}
}
