/**
* 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');
}
}
/**
* 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';
}
}
/**
* Returns a renderable array for the value of a single field in an entity.
*
* To integrate with in-place field editing when a non-standard render pipeline
* is used (FieldItemListInterface::view() is not sufficient to render back the
* field following in-place editing in the exact way it was displayed
* originally), implement this hook.
*
* Edit module integrates with HTML elements with data-edit-field-id attributes.
* For example:
* data-edit-field-id="node/1/<field-name>/und/<module-name>-<custom-id>"
* After the editing is complete, this hook is invoked on the module with
* the custom render pipeline identifier (last part of data-edit-field-id) to
* re-render the field. Use the same logic used when rendering the field for
* the original display.
*
* The implementation should take care of invoking the prepare_view steps. It
* should also respect field access permissions.
*
* @param \Drupal\Core\Entity\EntityInterface $entity
* The entity containing the field to display.
* @param string $field_name
* The name of the field to display.
* @param string $view_mode_id
* View mode ID for the custom render pipeline this field view was destined
* for. This is not a regular view mode ID for the Entity/Field API render
* pipeline and is provided by the renderer module instead. An example could
* be Views' render pipeline. In the example of Views, the view mode ID would
* probably contain the View's ID, display and the row index. Views would
* know the internal structure of this ID. The only structure imposed on this
* ID is that it contains dash separated values and the first value is the
* module name. Only that module's hook implementation will be invoked. Eg.
* 'views-...-...'.
* @param string $langcode
* (Optional) The language code the field values are to be shown in.
*
* @return
* A renderable array for the field value.
*
* @see \Drupal\Core\Field\FieldItemListInterface::view()
*/
function hook_quickedit_render_field(Drupal\Core\Entity\EntityInterface $entity, $field_name, $view_mode_id, $langcode)
{
return array('#prefix' => '<div class="example-markup">', 'field' => $entity->getTranslation($langcode)->get($field_name)->view($view_mode_id), '#suffix' => '</div>');
}