From 9b9b8018d718c50d4f50b9f2094e8c744cbdce2b Mon Sep 17 00:00:00 2001
From: Tobe O <thosakwe@gmail.com>
Date: Fri, 3 Aug 2018 13:36:34 -0400
Subject: [PATCH] Allow deprecating fields

---
 graphql_schema/lib/src/field.dart     |  6 ++++-
 graphql_server/lib/introspection.dart | 33 ++++++++++++++++++++++++++-
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/graphql_schema/lib/src/field.dart b/graphql_schema/lib/src/field.dart
index f369f299..54df9857 100644
--- a/graphql_schema/lib/src/field.dart
+++ b/graphql_schema/lib/src/field.dart
@@ -8,14 +8,18 @@ class GraphQLField<Value, Serialized> {
   final String name;
   final GraphQLFieldResolver<Value, Serialized> resolve;
   final GraphQLType<Value, Serialized> type;
+  final String deprecationReason;
 
   GraphQLField(this.name,
       {Iterable<GraphQLFieldArgument> arguments: const <GraphQLFieldArgument>[],
       @required this.resolve,
-      this.type}) {
+      this.type,
+      this.deprecationReason}) {
     this.arguments.addAll(arguments ?? <GraphQLFieldArgument>[]);
   }
 
+  bool get isDeprecated => deprecationReason?.isNotEmpty == true;
+
   FutureOr<Serialized> serialize(Value value) {
     return type.serialize(value);
   }
diff --git a/graphql_server/lib/introspection.dart b/graphql_server/lib/introspection.dart
index 6e9b19f0..5c75b665 100644
--- a/graphql_server/lib/introspection.dart
+++ b/graphql_server/lib/introspection.dart
@@ -161,16 +161,47 @@ GraphQLObjectType _createFieldType() {
       type: graphQLString,
       resolve: (f, _) => (f as GraphQLField).name,
     ),
+    field(
+      'isDeprecated',
+      type: graphQLString,
+      resolve: (f, _) => (f as GraphQLField).isDeprecated,
+    ),
+    field(
+      'deprecationReason',
+      type: graphQLString,
+      resolve: (f, _) => (f as GraphQLField).deprecationReason,
+    ),
+    field(
+      'args',
+      type: listType(graphQLString.nonNullable()).nonNullable(), // TODO: Input value type
+      resolve: (f, _) => (f as GraphQLField).arguments,
+    ),
   ]);
 }
 
 GraphQLObjectType _reflectDirectiveType() {
+  // TODO: What actually is this???
   return objectType('__Directive', fields: [
     field(
       'name',
-      type: graphQLString,
+      type: graphQLString.nonNullable(),
       resolve: (obj, _) => (obj as DirectiveContext).NAME.span.text,
     ),
+    field(
+      'description',
+      type: graphQLString,
+      resolve: (obj, _) => null,
+    ),
+    field(
+      'locations',
+      type: listType(graphQLString.nonNullable()).nonNullable(), // TODO: Enum directiveLocation
+      resolve: (obj, _) => [],
+    ),
+    field(
+      'args',
+      type: listType(graphQLString.nonNullable()).nonNullable(),
+      resolve: (obj, _) => [],
+    ),
   ]);
 }