3 namespace Drupal\hal\Normalizer;
5 use Drupal\Component\Utility\NestedArray;
6 use Drupal\serialization\Normalizer\FieldNormalizer as SerializationFieldNormalizer;
9 * Converts the Drupal field structure to HAL array structure.
11 class FieldNormalizer extends SerializationFieldNormalizer {
14 * The formats that the Normalizer can handle.
18 protected $format = ['hal_json'];
23 public function normalize($field, $format = NULL, array $context = []) {
24 $normalized_field_items = [];
26 // Get the field definition.
27 $entity = $field->getEntity();
28 $field_name = $field->getName();
29 $field_definition = $field->getFieldDefinition();
31 // If this field is not translatable, it can simply be normalized without
32 // separating it into different translations.
33 if (!$field_definition->isTranslatable()) {
34 $normalized_field_items = $this->normalizeFieldItems($field, $format, $context);
36 // Otherwise, the languages have to be extracted from the entity and passed
37 // in to the field item normalizer in the context. The langcode is appended
38 // to the field item values.
40 foreach ($entity->getTranslationLanguages() as $language) {
41 $context['langcode'] = $language->getId();
42 $translation = $entity->getTranslation($language->getId());
43 $translated_field = $translation->get($field_name);
44 $normalized_field_items = array_merge($normalized_field_items, $this->normalizeFieldItems($translated_field, $format, $context));
48 // Merge deep so that links set in entity reference normalizers are merged
49 // into the links property.
50 $normalized = NestedArray::mergeDeepArray($normalized_field_items);
55 * Helper function to normalize field items.
57 * @param \Drupal\Core\Field\FieldItemListInterface $field
59 * @param string $format
61 * @param array $context
65 * The array of normalized field items.
67 protected function normalizeFieldItems($field, $format, $context) {
68 $normalized_field_items = [];
69 if (!$field->isEmpty()) {
70 foreach ($field as $field_item) {
71 $normalized_field_items[] = $this->serializer->normalize($field_item, $format, $context);
74 return $normalized_field_items;