Version 1

[yaffs-website] / web / core / modules / hal / src / Normalizer / FieldNormalizer.php

diff --git a/web/core/modules/hal/src/Normalizer/FieldNormalizer.php b/web/core/modules/hal/src/Normalizer/FieldNormalizer.php
new file mode 100644 (file)
index 0000000..a4e1753
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+++ b/web/core/modules/hal/src/Normalizer/FieldNormalizer.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Drupal\hal\Normalizer;
+
+use Drupal\Component\Utility\NestedArray;
+use Drupal\serialization\Normalizer\FieldNormalizer as SerializationFieldNormalizer;
+
+/**
+ * Converts the Drupal field structure to HAL array structure.
+ */
+class FieldNormalizer extends SerializationFieldNormalizer {
+
+  /**
+   * The formats that the Normalizer can handle.
+   *
+   * @var array
+   */
+  protected $format = ['hal_json'];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function normalize($field, $format = NULL, array $context = []) {
+    $normalized_field_items = [];
+
+    // Get the field definition.
+    $entity = $field->getEntity();
+    $field_name = $field->getName();
+    $field_definition = $field->getFieldDefinition();
+
+    // If this field is not translatable, it can simply be normalized without
+    // separating it into different translations.
+    if (!$field_definition->isTranslatable()) {
+      $normalized_field_items = $this->normalizeFieldItems($field, $format, $context);
+    }
+    // Otherwise, the languages have to be extracted from the entity and passed
+    // in to the field item normalizer in the context. The langcode is appended
+    // to the field item values.
+    else {
+      foreach ($entity->getTranslationLanguages() as $language) {
+        $context['langcode'] = $language->getId();
+        $translation = $entity->getTranslation($language->getId());
+        $translated_field = $translation->get($field_name);
+        $normalized_field_items = array_merge($normalized_field_items, $this->normalizeFieldItems($translated_field, $format, $context));
+      }
+    }
+
+    // Merge deep so that links set in entity reference normalizers are merged
+    // into the links property.
+    $normalized = NestedArray::mergeDeepArray($normalized_field_items);
+    return $normalized;
+  }
+
+  /**
+   * Helper function to normalize field items.
+   *
+   * @param \Drupal\Core\Field\FieldItemListInterface $field
+   *   The field object.
+   * @param string $format
+   *   The format.
+   * @param array $context
+   *   The context array.
+   *
+   * @return array
+   *   The array of normalized field items.
+   */
+  protected function normalizeFieldItems($field, $format, $context) {
+    $normalized_field_items = [];
+    if (!$field->isEmpty()) {
+      foreach ($field as $field_item) {
+        $normalized_field_items[] = $this->serializer->normalize($field_item, $format, $context);
+      }
+    }
+    return $normalized_field_items;
+  }
+
+}