function role_delegation_field_widget_form_alter in Role Delegation 8

Implements hook_field_widget_form_alter().

File

./role_delegation.module, line 127

Allows admins to grant roles the authority to assign selected roles to users.

Code

function role_delegation_field_widget_form_alter(&$element, FormStateInterface $form_state, $context) {

  /** @var \Drupal\Core\Field\FieldItemListInterface $items */

  /** @var \Drupal\Core\Field\FieldDefinitionInterface $field_definition */
  $items = $context['items'];
  $field_definition = $items
    ->getFieldDefinition();

  // Since the field is computed, the default value of the form element will be
  // empty, so we need to adjust it.
  if ($field_definition
    ->getTargetEntityTypeId() === 'user' && $field_definition
    ->getName() === 'role_change' && isset($element['#options'])) {
    $roles_current = $items
      ->getEntity()
      ->getRoles();
    $roles_options = array_keys($element['#options']);
    $element['#default_value'] = array_intersect($roles_current, $roles_options);
  }
}