Merge pull request #1167 from zino-hofmann/fix-transform-nested-objects

fix(graphql): Transform nested objects

Author: vincenzopalazzo

packages/graphql/lib/src/cache/hive_store.dart

@@ -5,6 +5,29 @@ import 'package:hive/hive.dart';
 
 import './store.dart';
 
+Map<String, dynamic> _transformMap(Map<dynamic, dynamic> map) =>
+    Map<String, dynamic>.from(
+      {
+        for (var entry in map.entries) entry.key: _transformAny(entry.value),
+      },
+    );
+
+dynamic _transformAny(dynamic object) {
+  if (object is Map) {
+    return _transformMap(object);
+  }
+  if (object is List) {
+    return _transformList(object);
+  }
+  return object;
+}
+
+List<dynamic> _transformList(List<dynamic> list) => List<dynamic>.from(
+      [
+        for (var element in list) _transformAny(element),
+      ],
+    );
+
 @immutable
 class HiveStore extends Store {
   /// Default box name for the `graphql/client.dart` cache store (`graphqlClientStore`)
@@ -50,7 +73,7 @@ class HiveStore extends Store {
   Map<String, dynamic>? get(String dataId) {
     final result = box.get(dataId);
     if (result == null) return null;
-    return Map<String, dynamic>.from(result);
+    return _transformMap(result);
   }
 
   @override

packages/graphql/test/cache/store_test.dart

@@ -92,6 +92,35 @@ void main() {
         expect(readData2, equals({'foo': 'bar'}));
         expect(readData2, isA<Map<String, dynamic>>());
       });
+      test("Can re-open and read nested data", () async {
+        final box1 = await HiveStore.openBox(
+          're-open-store',
+          path: path,
+        );
+        final store = HiveStore(box1);
+        final data = {
+          'foo': 'bar',
+          'bob': [
+            {'nested': true}
+          ]
+        };
+        store.put("id", data);
+        final readData = await store.get("id");
+        expect(readData, equals(data));
+        expect(readData?['bob'], isA<List<dynamic>>());
+        expect(readData?['bob'][0], isA<Map<String, dynamic>>());
+        await box1.close();
+        final box2 = await HiveStore.openBox(
+          're-open-store',
+          path: path,
+        );
+        final store2 = HiveStore(box2);
+        final readData2 = await store2.get('id');
+        expect(readData2, equals(data));
+        expect(readData2, isA<Map<String, dynamic>>());
+        expect(readData2?['bob'], isA<List<dynamic>>());
+        expect(readData2?['bob'][0], isA<Map<String, dynamic>>());
+      });
       test("Can put null", () async {
         final box1 = await HiveStore.openBox(
           'put-null',