From 5513b8d8b775f3dd71e16fe44a4a5bf2f6755e32 Mon Sep 17 00:00:00 2001
From: florenttorregrosa <florenttorregrosa@2388214.no-reply.drupal.org>
Date: Fri, 2 Jun 2017 15:58:16 +0200
Subject: [PATCH] Issue #2883437 by Grimreaper, e0ipso: Transform link field
 value to use UUID

---
 src/Plugin/ResourceFieldEnhancerBase.php           |  14 +++
 .../jsonapi/FieldEnhancer/UuidLinkEnhancer.php     | 110 +++++++++++++++++++++
 2 files changed, 124 insertions(+)
 create mode 100644 src/Plugin/jsonapi/FieldEnhancer/UuidLinkEnhancer.php

diff --git a/src/Plugin/ResourceFieldEnhancerBase.php b/src/Plugin/ResourceFieldEnhancerBase.php
index 1fa7683..fa053d6 100644
--- a/src/Plugin/ResourceFieldEnhancerBase.php
+++ b/src/Plugin/ResourceFieldEnhancerBase.php
@@ -26,6 +26,13 @@ abstract class ResourceFieldEnhancerBase extends PluginBase implements ResourceF
   /**
    * {@inheritdoc}
    */
+  public function defaultConfiguration() {
+    return [];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function calculateDependencies() {
     // TODO: This should have a dependency on the resource_config entity.
     return [];
@@ -48,4 +55,11 @@ abstract class ResourceFieldEnhancerBase extends PluginBase implements ResourceF
     return $this->configuration;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function getSettingsForm(array $resource_field_info) {
+    return [];
+  }
+
 }
diff --git a/src/Plugin/jsonapi/FieldEnhancer/UuidLinkEnhancer.php b/src/Plugin/jsonapi/FieldEnhancer/UuidLinkEnhancer.php
new file mode 100644
index 0000000..c76be9e
--- /dev/null
+++ b/src/Plugin/jsonapi/FieldEnhancer/UuidLinkEnhancer.php
@@ -0,0 +1,110 @@
+<?php
+
+namespace Drupal\jsonapi_extras\Plugin\jsonapi\FieldEnhancer;
+
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\jsonapi_extras\Plugin\ResourceFieldEnhancerBase;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Use UUID for internal link field value.
+ *
+ * @ResourceFieldEnhancer(
+ *   id = "uuid_link",
+ *   label = @Translation("UUID for link (link field only)"),
+ *   description = @Translation("Use UUID for internal link field.")
+ * )
+ */
+class UuidLinkEnhancer extends ResourceFieldEnhancerBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * The entity type manager.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function __construct(array $configuration, $plugin_id, array $plugin_definition, EntityTypeManagerInterface $entity_type_manager) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->entityTypeManager = $entity_type_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('entity_type.manager')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function postProcess($value) {
+    if (isset($value['uri'])) {
+      // Check if it is a link to an entity.
+      preg_match("/entity:(.*)\/(.*)/", $value['uri'], $parsed_uri);
+      if (!empty($parsed_uri)) {
+        $entity_type = $parsed_uri[1];
+        $entity_id = $parsed_uri[2];
+        $entity = $this->entityTypeManager->getStorage($entity_type)->load($entity_id);
+        if (!is_null($entity)) {
+          $value['uri'] = 'entity:' . $entity_type . '/' . $entity->bundle() . '/' . $entity->uuid();
+        }
+        // Remove the value.
+        else {
+          $value = [
+            'uri' => '',
+            'title' => '',
+            'options' => [],
+          ];
+        }
+      }
+    }
+
+    return $value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function prepareForInput($value) {
+    if (isset($value['uri'])) {
+      // Check if it is a link to an entity.
+      preg_match("/entity:(.*)\/(.*)\/(.*)/", $value['uri'], $parsed_uri);
+      if (!empty($parsed_uri)) {
+        $entity_type = $parsed_uri[1];
+        $entity_uuid = $parsed_uri[3];
+        $entities = $this->entityTypeManager->getStorage($entity_type)->loadByProperties(['uuid' => $entity_uuid]);
+        if (!empty($entities)) {
+          $entity = array_shift($entities);
+          $value['uri'] = 'entity:' . $entity_type . '/' . $entity->id();
+        }
+        else {
+          // If the entity has not been imported yet we unset the field value.
+          $value = [];
+        }
+      }
+    }
+
+    return $value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getJsonSchema() {
+    return [
+      'type' => 'object',
+    ];
+  }
+
+}
-- 
1.9.1