public function EntityReferenceExportFormatter::view in REST Views 8

Same name and namespace in other branches

1. 2.0.x src/Plugin/Field/FieldFormatter/EntityReferenceExportFormatter.php \Drupal\rest_views\Plugin\Field\FieldFormatter\EntityReferenceExportFormatter::view()

Overrides EntityReferenceFormatterBase::view

See also

::prepareView()

::getEntitiestoView()

File

src/Plugin/Field/FieldFormatter/EntityReferenceExportFormatter.php, line 32

Class

EntityReferenceExportFormatter

A plugin that creates a serializable form of a rendered entity.

Namespace

Drupal\rest_views\Plugin\Field\FieldFormatter

Code

public function view(FieldItemListInterface $items, $langcode = NULL) {
  $elements = $this
    ->viewElements($items, $langcode);
  $output = [
    '#items' => $items,
  ];
  $entity_key = '#' . $this
    ->getFieldSetting('target_type');
  $extra = $this
    ->getSetting('extra');
  foreach ($elements as $delta => $row) {
    $output[$delta] = [];

    // Entities build their fields in a pre-render function.
    if (isset($row['#pre_render'])) {
      foreach ((array) $row['#pre_render'] as $callable) {
        $row = $callable($row);
      }
    }

    /** @var \Drupal\Core\Entity\EntityInterface $entity */
    $entity = $row[$entity_key];
    if (!empty($extra['id'])) {
      $output[$delta]['id'] = $entity
        ->id();
    }
    if (!empty($extra['title'])) {
      $output[$delta]['title'] = $entity
        ->label();
    }
    if (!empty($extra['url'])) {
      try {
        $output[$delta]['url'] = $entity
          ->toUrl()
          ->setAbsolute()
          ->toString();
      } catch (Exception $exception) {
        $output[$delta]['url'] = NULL;
      }
    }
    if (!empty($extra['type'])) {
      $output[$delta]['type'] = $entity
        ->getEntityTypeId();
    }
    if (!empty($extra['bundle'])) {
      $output[$delta]['bundle'] = $entity
        ->bundle();
    }

    // Traverse the fields and build a serializable array.
    foreach (Element::children($row) as $name) {
      $alias = preg_replace('/^field_/', '', $name);
      if (!empty($output[$delta][$alias])) {
        continue;
      }
      $field = $row[$name];
      foreach (Element::children($field) as $index) {
        $value = $field[$index];
        if (isset($value['#type']) && $value['#type'] === 'data') {
          $value = SerializedData::create($value['#data']);
        }
        else {
          $value = RenderableData::create($value);
        }
        $output[$delta][$alias][$index] = $value;
      }

      // If the field has no multiple cardinality, unpack the array.
      if (!empty($field['#items'])) {

        /** @var \Drupal\Core\Field\FieldItemListInterface $field_items */
        $field_items = $field['#items'];
        if (!$field_items
          ->getFieldDefinition()
          ->getFieldStorageDefinition()
          ->isMultiple()) {
          $output[$delta][$alias] = reset($output[$delta][$alias]);
        }
      }
    }
    $output[$delta] = [
      '#type' => 'data',
      '#data' => SerializedData::create($output[$delta]),
    ];
  }
  return $output;
}