Added generic url interface.

Author: pmelab

src/Plugin/GraphQL/Fields/ExampleRoute.php

@@ -13,7 +13,7 @@
  * @GraphQLField(
  *   id = "example_url_route",
  *   name = "route",
- *   type = "Url",
+ *   type = "GenericUrl",
  *   nullable = true,
  *   arguments = {
  *     "path" = "String"

src/Plugin/GraphQL/Fields/PageTitle.php

@@ -18,7 +18,7 @@
  *   name = "pageTitle",
  *   nullable = true,
  *   multi = false,
- *   types = {"Url"}
+ *   types = {"GenericUrl"}
  * )
  */
 class PageTitle extends FieldPluginBase {

src/Plugin/GraphQL/Interfaces/GenericUrl.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Drupal\graphql_example\Plugin\GraphQL\Interfaces;
+
+use Drupal\Core\Url;
+use Drupal\graphql_core\Annotation\GraphQLInterface;
+use Drupal\graphql_core\GraphQL\InterfacePluginBase;
+
+/**
+ * Common interface for internal and external Urls.
+ *
+ * For simplicity reasons, this example does not utilize dependency injection.
+ *
+ * @GraphQLInterface(
+ *   id = "generic_url",
+ *   name = "GenericUrl"
+ * )
+ */
+class GenericUrl extends InterfacePluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function resolveType($object) {
+    if ($object instanceof Url) {
+      /** @var \Drupal\graphql_core\GraphQLSchemaManagerInterface $schemaManager */
+      $schemaManager = \Drupal::service('graphql_core.schema_manager');
+      if ($object->isExternal()) {
+        return $schemaManager->findByName('ExternalUrl', [
+          GRAPHQL_CORE_TYPE_PLUGIN,
+        ]);
+      }
+      else {
+        return $schemaManager->findByName('Url', [
+          GRAPHQL_CORE_TYPE_PLUGIN,
+        ]);
+      }
+    }
+  }
+
+}

src/Plugin/GraphQL/Types/ExternalUrl.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Drupal\graphql_example\Plugin\GraphQL\Types;
+
+
+use Drupal\graphql_core\Annotation\GraphQLType;
+use Drupal\graphql_core\GraphQL\TypePluginBase;
+
+/**
+ * GraphQL Type for external urls.
+ *
+ * @GraphQLType(
+ *   id = "external_url",
+ *   name = "ExternalUrl",
+ *   interfaces = {"GenericUrl"}
+ * )
+ */
+class ExternalUrl extends TypePluginBase {
+
+}