From fbf4c3a952435836ad9ba34b44b9fdb307d5c6de Mon Sep 17 00:00:00 2001
From: Christopher Chedeau <vjeuxx@gmail.com>
Date: Tue, 27 Jun 2017 18:51:56 -0700
Subject: [PATCH] GraphQL: Support object definition implements (#2307)

---
 src/printer-graphql.js                                | 11 +++++++++--
 .../__snapshots__/jsfmt.spec.js.snap                  |  9 +++++++++
 tests/graphql_object_type_def/implements.graphql      |  2 ++
 3 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 tests/graphql_object_type_def/implements.graphql

diff --git a/src/printer-graphql.js b/src/printer-graphql.js
index 838062fad..a43f0c726 100644
--- a/src/printer-graphql.js
+++ b/src/printer-graphql.js
@@ -214,12 +214,19 @@ function genericPrint(path, options, print) {
     }
 
     case "ObjectTypeDefinition": {
-      const parent = path.getParentNode();
       return concat([
         "type ",
         path.call(print, "name"),
+        n.interfaces && n.interfaces.length > 0
+          ? concat([" implements ", join(", ", path.map(print, "interfaces"))])
+          : "",
+        printDirectives(path, print, n),
         " {",
-        indent(concat([hardline, join(hardline, path.map(print, "fields"))])),
+        n.fields && n.fields.length > 0
+          ? indent(
+              concat([hardline, join(hardline, path.map(print, "fields"))])
+            )
+          : "",
         hardline,
         "}"
       ]);
diff --git a/tests/graphql_object_type_def/__snapshots__/jsfmt.spec.js.snap b/tests/graphql_object_type_def/__snapshots__/jsfmt.spec.js.snap
index 048bc3eaf..14a33e43c 100644
--- a/tests/graphql_object_type_def/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/graphql_object_type_def/__snapshots__/jsfmt.spec.js.snap
@@ -11,6 +11,15 @@ extend type Feedback {
 
 `;
 
+exports[`implements.graphql 1`] = `
+type VRMConversation implements Node, Entity @foo {
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+type VRMConversation implements Node, Entity @foo {
+}
+
+`;
+
 exports[`object_type_def.graphql 1`] = `
 type FeedHomeStories {
   debug_info: String
diff --git a/tests/graphql_object_type_def/implements.graphql b/tests/graphql_object_type_def/implements.graphql
new file mode 100644
index 000000000..62e65f891
--- /dev/null
+++ b/tests/graphql_object_type_def/implements.graphql
@@ -0,0 +1,2 @@
+type VRMConversation implements Node, Entity @foo {
+}