protected function ParagraphsWidget::getChildParagraphs

Returns a list of child paragraphs for a given field to loop over.

Parameters

\Drupal\Core\Form\FormStateInterface $form_state: The form state.

string $field_name: The field name for which to find child paragraphs.

\Drupal\paragraphs\ParagraphInterface $paragraph: The current paragraph.

array $array_parents: The current field parent structure.

Return value

\Drupal\paragraphs\Entity\Paragraph[] Child paragraphs.

File

paragraphs/src/Plugin/Field/FieldWidget/ParagraphsWidget.php, line 1499

Class

ParagraphsWidget

Plugin implementation of the 'entity_reference_revisions paragraphs' widget.

Namespace

Code

protected function getChildParagraphs(FormStateInterface $form_state, $field_name, ParagraphInterface $paragraph = NULL, array $array_parents = []) {

  // Convert the parents structure which only includes field names and delta
  // to the full storage array key which includes a prefix and a subform.
  $full_parents_key = [
    'field_storage',
    '#parents',
  ];
  foreach ($array_parents as $i => $parent) {
    $full_parents_key[] = $parent;
    if ($i % 2) {
      $full_parents_key[] = 'subform';
    }
  }
  $current_parents = array_merge($full_parents_key, [
    '#fields',
    $field_name,
  ]);
  $child_field_state = NestedArray::getValue($form_state
    ->getStorage(), $current_parents);
  $entities = [];
  if ($child_field_state && isset($child_field_state['paragraphs'])) {

    // Fetch the paragraphs from the field state. Use the original delta
    // to get the right position. Also reorder the paragraphs in the widget
    // state accordingly.
    $new_widget_paragraphs = [];
    foreach ($child_field_state['paragraphs'] as $child_delta => $child_field_item_state) {
      $entities[array_search($child_delta, $child_field_state['original_deltas'])] = $child_field_item_state['entity'];
      $new_widget_paragraphs[array_search($child_delta, $child_field_state['original_deltas'])] = $child_field_item_state;
    }
    ksort($entities);

    // Set the orderd paragraphs into the widget state and reset original
    // deltas.
    ksort($new_widget_paragraphs);
    $child_field_state['paragraphs'] = $new_widget_paragraphs;
    $child_field_state['original_deltas'] = range(0, count($child_field_state['paragraphs']) - 1);
    NestedArray::setValue($form_state
      ->getStorage(), $current_parents, $child_field_state);
  }
  elseif ($paragraph) {

    // If there is no field state, return the paragraphs directly from the
    // entity.
    foreach ($paragraph
      ->get($field_name) as $child_delta => $item) {
      if ($item->entity) {
        $entities[$child_delta] = $item->entity;
      }
    }
  }
  return $entities;
}