feat: add feedback executor hook

example/README.md

@@ -28,6 +28,7 @@
 
 - [ ] Change Page to Screen?
 - [ ] Find a way to justify having Page -> View (ViewTemplate + StateHolder) maybe eventually Page = View + PageController where the controller can access to feature flags. 
+- [ ] How can we create sharable components between feature modules. Meaning a Component could be part of `ModulaA` but imported and included on `ModuleB` and have the same behavior out of the box. How feature flags could work at this level.
 
 ---
 From Atomic Design guides:

example/lib/get/get_app_navigator.dart

@@ -1,4 +1,4 @@
-import 'package:buzz/navigation.dart';
+import 'package:buzz/buzz.dart';
 import 'package:get/get.dart';
 
 class GetAppNavigator extends Navigator {
@@ -23,3 +23,10 @@ class GetAppNavigator extends Navigator {
     Get.toNamed(path);
   }
 }
+
+class GetFeedbacksExecutor extends FeedbacksExecutor {
+  @override
+  void snackBar(String title, String message) {
+    Get.snackbar(title, message);
+  }
+}

example/lib/get/get_main.dart

@@ -22,6 +22,7 @@ void main() {
             Buzz
               ..init(
                 navigator: GetAppNavigator(),
+                feedbacksExecutor: GetFeedbacksExecutor(),
                 moduleRegistries: [
                   ProfileModuleRegistries(
                     () => Get.find<IProfileRepository>(),
@@ -50,8 +51,6 @@ void main() {
                 NavigateBackCommand(),
               );
             },
-            //TODO: Validate stream being injected here.
-            profileStream: Get.find<IProfileRepository>().profileStateChanges,
           ),
         ),
       ],

example/lib/modular/modular_app_navigator.dart

@@ -1,4 +1,4 @@
-import 'package:buzz/navigation.dart';
+import 'package:buzz/buzz.dart' show Navigator, FeedbacksExecutor;
 import 'package:flutter_modular/flutter_modular.dart';
 
 class ModularAppNavigator extends Navigator {

lib/buzz.dart

@@ -1,6 +1,7 @@
 library buzz;
 
 export 'buzz_impl.dart';
+export 'feedbacks.dart';
 export 'infra/event_bus_holder.dart';
 export 'infra/registries.dart';
 export 'infra/typed_event_bus.dart';

lib/buzz_impl.dart

@@ -1,4 +1,5 @@
 import 'package:buzz/buzz.dart';
+import 'package:buzz/feedbacks.dart';
 
 import 'infra/registries.dart';
 import 'utils.dart';
@@ -23,9 +24,11 @@ abstract class IBuzzBase {
   UiEventBus get uiEvents;
 
   Navigator get navigator;
+  FeedbacksExecutor get feedbacksExecutor;
 
   void init({
     required Navigator navigator,
+    FeedbacksExecutor? feedbacksExecutor,
     List<ModuleBuzzRegistries>? moduleRegistries,
   });
 
@@ -37,6 +40,9 @@ class BuzzBase implements IBuzzBase {
   @override
   Navigator get navigator => _navigator;
 
+  @override
+  FeedbacksExecutor get feedbacksExecutor => _feedbacksExecutor;
+
   @override
   AppEventBus get appEvents => EventBusHolder.of<AppEventBus>();
 
@@ -47,14 +53,17 @@ class BuzzBase implements IBuzzBase {
   UiEventBus get uiEvents => EventBusHolder.of<UiEventBus>();
 
   late Navigator _navigator;
+  late FeedbacksExecutor _feedbacksExecutor;
   List<ModuleBuzzRegistries>? _moduleRegistries;
 
   @override
   void init({
     required Navigator navigator,
+    FeedbacksExecutor? feedbacksExecutor,
     List<ModuleBuzzRegistries>? moduleRegistries,
   }) {
     _navigator = navigator;
+    _feedbacksExecutor = feedbacksExecutor ?? DefaultFeedbacksExecutor();
     _moduleRegistries = moduleRegistries;
 
     _bindNavigationCommandHandler();

lib/feedbacks.dart

@@ -0,0 +1,45 @@
+import 'package:buzz/buzz.dart';
+import 'package:buzz/utils.dart';
+
+abstract class FeedbacksCommand extends Command {}
+
+class ShowSnackBarCommand extends FeedbacksCommand {
+  ShowSnackBarCommand(
+    this.title, {
+    required this.message,
+  });
+
+  final String title;
+  final String message;
+}
+
+abstract class FeedbacksExecutor {
+  void snackBar(String title, String message);
+}
+
+class FeedbacksCommandHandler extends TypedEventHandler<FeedbacksCommand> {
+  FeedbacksCommandHandler({
+    required this.feedbacksExecutor,
+  });
+
+  final FeedbacksExecutor feedbacksExecutor;
+
+  @override
+  void handle(FeedbacksCommand command) {
+    if (command is ShowSnackBarCommand) {
+      feedbacksExecutor.snackBar(command.title, command.message);
+      Buzz.fire(OnShowedSnackBarEvent());
+    }
+
+    //TODO: Add more cases
+  }
+}
+
+class OnShowedSnackBarEvent extends AppEvent {}
+
+class DefaultFeedbacksExecutor extends FeedbacksExecutor {
+  @override
+  void snackBar(String title, String message) {
+    developerLog('$title:$message');
+  }
+}