adds unleash for feature flagging

lib/core/config/unleash_config.dart

@@ -0,0 +1,15 @@
+import 'package:unleash/unleash.dart';
+import 'package:unplash_sample/core/utils/string_constants.dart';
+
+abstract class UnleashConfig {
+  bool get isDetailsPageEnabled;
+}
+
+class UnleashConfigImp extends UnleashConfig {
+  final Unleash unleash;
+
+  UnleashConfigImp(this.unleash);
+
+  @override
+  bool get isDetailsPageEnabled => unleash.isEnabled(isImageDetailsEnabled, defaultValue: false);
+}

lib/core/utils/string_constants.dart

@@ -1 +1,2 @@
 const String serverErrorMessage = "Server error, please try agian later!";
+const String isImageDetailsEnabled = "isImageDetailsEnabled";

lib/dependency_injection.dart

@@ -1,5 +1,8 @@
 import 'package:dio/dio.dart';
+import 'package:flutter_dotenv/flutter_dotenv.dart';
 import 'package:get_it/get_it.dart';
+import 'package:unleash/unleash.dart';
+import 'package:unplash_sample/core/config/unleash_config.dart';
 import 'package:unplash_sample/features/home/data/datasources/unsplash_remote_datasource.dart';
 import 'package:unplash_sample/features/home/data/repositories/unsplash_repository_impl.dart';
 import 'package:unplash_sample/features/home/domain/repositories/unsplash_repository.dart';
@@ -11,7 +14,7 @@ class DependencyInjection {
 
   static GetIt get getIt => GetIt.instance;
 
-  static void initialize() {
+  static Future<void> initialize() async {
     getIt.registerFactory(() => UnsplashImageBloc(getIt()));
 
     getIt.registerLazySingleton(() => FetchImages(repository: getIt()));
@@ -24,6 +27,19 @@ class DependencyInjection {
       () => UnsplashRemoteDataSourceImpl(getIt()),
     );
 
+    final unleash = await Unleash.init(
+      UnleashSettings(
+        appName: "unplash_demo",
+        instanceId: "instanceId",
+        // TODO(AyushBherwani1998): Fix me
+        unleashApi: Uri.parse(""),
+        apiToken: dotenv.env["UNLEASH_API_KEY"] as String,
+      ),
+    );
+
+    getIt.registerLazySingleton(() => unleash);
+    getIt.registerLazySingleton(() => UnleashConfigImp(getIt()));
+
     getIt.registerLazySingleton(() => Dio());
   }
 }

lib/main.dart

@@ -5,8 +5,8 @@ import 'package:unplash_sample/features/home/presentation/pages/home_page.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  DependencyInjection.initialize();
   await dotenv.load(fileName: "./lib/core/.env");
+  await DependencyInjection.initialize();
   runApp(const MyApp());
 }
 

pubspec.lock

@@ -268,10 +268,10 @@ packages:
     dependency: transitive
     description:
       name: http
-      sha256: "759d1a329847dd0f39226c688d3e06a6b8679668e350e2891a6474f8b4bb8525"
+      sha256: "5895291c13fa8a3bd82e76d5627f69e0d85ca6a30dcac95c4ea19a5d555879c2"
       url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "0.13.6"
   http_multi_server:
     dependency: transitive
     description:
@@ -645,6 +645,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.3.2"
+  unleash:
+    dependency: "direct main"
+    description:
+      name: unleash
+      sha256: "59845a6846509205de91238fc227c965781eacd0f480fc998ed19a97a2ead170"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.4.1"
   uuid:
     dependency: transitive
     description:

pubspec.yaml

@@ -40,6 +40,7 @@ dependencies:
   get_it: ^7.6.0
   go_router: ^10.0.0
   mocktail: ^0.3.0
+  unleash: ^0.4.1
 
 
   # The following adds the Cupertino Icons font to your application.

test/core/config/unleash_config_test.dart

@@ -0,0 +1,39 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mocktail/mocktail.dart';
+import 'package:unleash/unleash.dart';
+import 'package:unplash_sample/core/config/unleash_config.dart';
+import 'package:unplash_sample/core/utils/string_constants.dart';
+
+import '../mocks/unleash_mock.dart';
+
+void main() {
+  late final UnleashConfig unleashConifg;
+  late final Unleash unleashMock;
+
+  group('UnleashConfig tests', () {
+    setUpAll(() {
+      unleashMock = UnleashMock();
+      unleashConifg = UnleashConfigImp(unleashMock);
+    });
+
+    test(
+      "returns true if the remote flag for isImageDetailsEnabled if true",
+      () {
+        when(() => unleashMock.isEnabled(isImageDetailsEnabled))
+            .thenReturn(true);
+
+        expect(unleashConifg.isDetailsPageEnabled, isTrue);
+      },
+    );
+
+    test(
+      "returns false if the remote flag for isImageDetailsEnabled if false",
+      () {
+        when(() => unleashMock.isEnabled(isImageDetailsEnabled))
+            .thenReturn(false);
+
+        expect(unleashConifg.isDetailsPageEnabled, isFalse);
+      },
+    );
+  });
+}

test/core/mocks/unleash_mock.dart

@@ -0,0 +1,4 @@
+import 'package:mocktail/mocktail.dart';
+import 'package:unleash/unleash.dart';
+
+class UnleashMock extends Mock implements Unleash {}