Minor refactoring

android/gradle.properties

@@ -1,3 +1,4 @@
 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
+android.enableR8=true

lib/domain/common/use_case.dart

@@ -1,7 +1,7 @@
-abstract class BaseUseCase<Output> {
+abstract class UseCase<Output> {
   Future<Output> run();
 }
 
-abstract class BaseStreamUseCase<Output> {
+abstract class StreamUseCase<Output> {
   Stream<Output> run();
-}
+}

lib/domain/error/error.dart

@@ -0,0 +1,11 @@
+/// Defines user facing errors.
+enum Error {
+  /// A generic error.
+  unknown,
+
+  /// No internet connection error.
+  connection,
+
+  /// Unauthorized 401 error.
+  unauthorized,
+}

lib/domain/model/error.dart → lib/domain/error/error_handler.dart

@@ -1,16 +1,5 @@
 import 'package:dio/dio.dart';
-
-/// Defines user facing errors.
-enum Error {
-  /// A generic error.
-  unknown,
-
-  /// No internet connection error.
-  connection,
-
-  /// Unauthorized 401 error.
-  unauthorized,
-}
+import 'package:flutter_template/domain/error/error.dart';
 
 class ErrorHandler {
   static List<Error> obtainAll(dynamic error) {

lib/main.dart

@@ -1,117 +1,6 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_template/presentation/app.dart';
 
 void main() {
-  runApp(MyApp());
-}
-
-class MyApp extends StatelessWidget {
-  // This widget is the root of your application.
-  @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Flutter Demo',
-      theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // Try running your application with "flutter run". You'll see the
-        // application has a blue toolbar. Then, without quitting the app, try
-        // changing the primarySwatch below to Colors.green and then invoke
-        // "hot reload" (press "r" in the console where you ran "flutter run",
-        // or simply save your changes to "hot reload" in a Flutter IDE).
-        // Notice that the counter didn't reset back to zero; the application
-        // is not restarted.
-        primarySwatch: Colors.blue,
-        // This makes the visual density adapt to the platform that you run
-        // the app on. For desktop platforms, the controls will be smaller and
-        // closer together (more dense) than on mobile platforms.
-        visualDensity: VisualDensity.adaptivePlatformDensity,
-      ),
-      home: MyHomePage(title: 'Flutter Demo Home Page'),
-    );
-  }
-}
-
-class MyHomePage extends StatefulWidget {
-  MyHomePage({Key key, this.title}) : super(key: key);
-
-  // This widget is the home page of your application. It is stateful, meaning
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
-
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
-
-  final String title;
-
-  @override
-  _MyHomePageState createState() => _MyHomePageState();
-}
-
-class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
-
-  void _incrementCounter() {
-    setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
-    return Scaffold(
-      appBar: AppBar(
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
-        title: Text(widget.title),
-      ),
-      body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Invoke "debug painting" (press "p" in the console, choose the
-          // "Toggle Debug Paint" action from the Flutter Inspector in Android
-          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
-          // to see the wireframe for each widget.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headline4,
-            ),
-          ],
-        ),
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
-    );
-  }
+  runApp(App());
 }

lib/presentation/app.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_template/presentation/app_router.dart';
+
+class App extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Project Name',
+      onGenerateRoute: AppRouter.onGenerateRoute,
+    );
+  }
+}

lib/presentation/app_router.dart

@@ -0,0 +1,28 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/widgets.dart';
+import 'package:flutter_template/presentation/feature/home/home_page_route.dart';
+
+/// Contains classes and helpers for navigation.
+/// To navigate to a page use the [BuildContext.navigateTo] extension function.
+/// - Example: context.navigateTo(HomeRoute(fieldExample = "hello"));
+/// To pop the Navigation stack to a specific page use the [BuildContext.popUntil] extension function.
+/// - Example: context.popUntil(HomeRoute.name);
+class AppRouter {
+  static Route<dynamic> onGenerateRoute(RouteSettings settings) {
+    final args = settings.arguments;
+    return args is AppRoute ? args.route : HomePageRoute().route;
+  }
+}
+
+abstract class AppRoute {
+  String get name;
+
+  Widget get page;
+
+  MaterialPageRoute get route {
+    return MaterialPageRoute(
+      builder: (context) => page,
+      settings: RouteSettings(name: name),
+    );
+  }
+}

lib/presentation/common/bloc.dart

@@ -0,0 +1,5 @@
+abstract class Bloc {
+  Future<void> initState() async {}
+
+  void dispose();
+}

lib/presentation/common/error_messages.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/widgets.dart';
-import 'package:flutter_template/domain/model/error.dart';
+import 'package:flutter_template/domain/error/error.dart';
 
 extension ErrorMessages on Error {
   String getMessage(BuildContext context) {

lib/presentation/feature/home/home_page.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_template/presentation/feature/home/home_page_tab.dart';
+
+class HomePage extends StatefulWidget {
+  HomePage({Key key, this.tab}) : super(key: key);
+
+  final HomePageTab tab;
+
+  @override
+  _HomePageState createState() => _HomePageState();
+}
+
+class _HomePageState extends State<HomePage> {
+  int _counter = 0;
+
+  void _incrementCounter() {
+    setState(() {
+      _counter++;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(widget.tab.toString()),
+      ),
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            Text(
+              'You have pushed the button this many times:',
+            ),
+            Text(
+              '$_counter',
+              style: Theme.of(context).textTheme.headline4,
+            ),
+          ],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _incrementCounter,
+        tooltip: 'Increment',
+        child: Icon(Icons.add),
+      ), // This trailing comma makes auto-formatting nicer for build methods.
+    );
+  }
+}

lib/presentation/feature/home/home_page_route.dart

@@ -0,0 +1,15 @@
+import 'package:flutter_template/presentation/feature/home/home_page.dart';
+import 'package:flutter_template/presentation/feature/home/home_page_tab.dart';
+import 'package:flutter_template/presentation/app_router.dart';
+
+class HomePageRoute extends AppRoute {
+  final HomePageTab tab;
+
+  HomePageRoute({this.tab = HomePageTab.first});
+
+  @override
+  get page => HomePage(tab: tab);
+
+  @override
+  get name => '/';
+}

lib/presentation/feature/home/home_page_tab.dart

@@ -0,0 +1,5 @@
+enum HomePageTab {
+  first,
+  second,
+  third,
+}

test/widget_test.dart

@@ -5,26 +5,10 @@
 // gestures. You can also use WidgetTester to find child widgets in the widget
 // tree, read text, and verify that the values of widget properties are correct.
 
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-import 'package:flutter_template/main.dart';
-
 void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
-    // Build our app and trigger a frame.
-    await tester.pumpWidget(MyApp());
-
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
-
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
-    await tester.pump();
-
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
+  testWidgets('TODO', (WidgetTester tester) async {
+    // TODO
   });
 }