uloc 1.0.21

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** ULoC — UI-Logic-Controller / Router for Flutter** #

ULoC is a developer-friendly tool that combines routing, logic injection, and screen scaffolding into one seamless workflow for Flutter.
It's designed to work perfectly with Provider, and follows scalable patterns like MVC or MVVM.

Stop wiring up routes manually. Let ULoC handle it, while you focus on logic and design.

Overview #

• 🔧 Based on provider for easy state and logic injection
• 🔁 Auto-generates Routes and ULoC map from a @ULoCDeclaration
• 🧱 Scaffolds new screens with controller + view files
• 🧬 Lifecycle hooks (onInit, onReady, onDispose)
• 🚀 Supports dynamic named routes with parameters — great for deep linking
• ✅ Perfect for large projects and scalable architecture (MVC/MVVM)

Functionalities #

• Route generate with type safe parameter
• Widget generate
• Separate view and controller
• Convenient lifecycle hook
• Access to context and setstate from any where
• find ancestor provider from previous pages
• Support paramaters and URL query - Great for deeplink
• Easy navigation with custom navigational fucntions in providers
• Named and Widget navigation

Installation #

In your Flutter project:

dependencies:
  uloc: ^latest

Then:

dart pub get

CLI Commands #

# To install globally:
dart pub global activate uloc

# To install to package:
dart pub add uloc

# Usage globally:
uloc <command> [arguments]

# Usage package:
dart run uloc <command> [arguments]

# Print usage information.
uloc help
uloc -h
uloc --help

# Generate routing files.
# Generate routing files for the current project from ULoCDeclaration
# By default, the route declaration dir is lib/routes/routes.dart.
# the target file dir is lib/routes/routes.uloc.g.dart
uloc gen-route
uloc gr
uloc gen-route --dir lib/routes/routes.dart --target lib/routes/routes.uloc.g.dart
uloc gr -d lib/routes/routes.dart -t lib/routes/routes.uloc.g.dart

# Generate new widget page.
# By default, the route declaration dir is lib/app/screens/.
# the structure as below:
# lib/screens/home/
# ├── views/pages/home_page.dart
# └── controllers/home_controller.dart
uloc gen-page home
uloc gp book_detail --parameters id,title
uloc gp book_detail --parameters id --parameters title --gen-route --route-declaration-dir lib/routes/routes.dart --route-target-dir lib/routes/routes.uloc.g.dart
uloc gp home -g -r lib/routes/routes.dart -t lib/routes/routes.uloc.g.dart

# Generate new widget page with type safe parameter
# Please manually import class path after generate
uloc gp detail_page --add-page-arg data-BookDetail -g

Route Declaration Example #

@ULoCDeclaration()
class MyRoutes extends ULoCRouteDeclaration {
  @override
  Map<String, ULoCRoute<ULoCProvider>> get route => {
    'WILDCARD': ULoCRoute(
      route: '*',
      provider: (context, _) => NotFoundController(context),
      child: NotFoundPage,
    ),
    'HOME': ULoCRoute(
      route: '/',
      provider: (context, _) => HomeController(context),
      child: HomePage,
    ),
    'DETAIL': ULoCRouteDefine(
      route: '/detail/:id',
      provider: (context, route) => DetailController(
        context,
        id: route?.param('id'),
        data: route?.arguments<BookDetail>('data'),
      ),
      child: DetailPage,
    ),
  };
}

Generated Output #

class Routes {
  Routes._();

  static ULoCRoute WILDCARD = ULoCRoute('*');
  static ULoCRoute HOME = ULoCRoute('/');
  static ULoCRoute DETAIL({String? id, BookDetail? data}) =>
      ULoCRoute('/detail/:id', routeParams: [id], arguments: {'data': data});

  static ULoCRoute fromString(String? url) => ULoCRoute.fromString(url);

  /// use this to pass to [MaterialApp] Route setting
  static final ULoCRouteConfiguration ulocRouteConfiguration = ULoCRouteConfiguration([
    RouteProperties<NotFoundController>(
      routeName: Routes.WILDCARD,
      provider: (context, _) => NotFoundController(context),
      child: NotFoundPage(),
    ),
    RouteProperties<HomeController>(
      routeName: Routes.HOME,
      provider: (context, _) => HomeController(context),
      child: HomePage(),
    ),
    RouteProperties<DetailController>(
      routeName: Routes.DETAIL(),
      provider: (context, route) => DetailController(
        context,
        id: route?.param('id'),
        data: route?.arguments<BookDetail>('data'),
      ),
      child: DetailPage(),
    ),
  ]);
}

--

Controller #

class DetailController extends ULoCProvider {
  final String? id;
  final BookDetail? data;
  DetailController(super.context, {this.id, this.data});
  String name = "Detail";
  String content = "Detail has not yet implemented";

  int count = 0;

  @override
  void onInit() {
    super.onInit();

    // get query from route
    String utmSource = query('utm_source');
    Map<String, dynamic> allQuery = queryParametersAll;

    // get Flutter route arguments
    final dynamic args =  arguments;

    // get ULoC route arguments
    final Map<String, dynamic>? args =  ulocArguments;
  }

  @override
  void onReady() {
    super.onReady();
  }

  @override
  void onDispose() {
    super.onDispose();
  }

  void increment() {
    count++;
    setstate();
  }

  void decrement() {
    setstate(() {
      count--;
    });
  }
}

--

View #

class DetailPage extends StatefulWidget {
  const DetailPage({super.key});

  @override
  State<DetailPage> createState() => _DetailPageState();
}

class _DetailPageState extends State<DetailPage> {
  // watch will trigger rebuild widget on watch value changed
  DetailController get watch => context.watch<DetailController>();

  // controller gives access to controller properties but won't trigger rebuild on properties' value change
  DetailController get controller => context.read<DetailController>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(watch.name)),
      body: Center(
        child: Text(watch.count.toString(), style: TextStyle(fontSize: 40)),
      ),
      floatingActionButton: Column(
        mainAxisSize: MainAxisSize.min,
        spacing: 8,
        children: [
          FloatingActionButton.small(
            heroTag: 'increment',
            onPressed: controller.increment,
            child: Icon(Icons.add),
          ),
          FloatingActionButton.small(
            heroTag: 'decrement',
            onPressed: controller.decrement,
            child: Icon(Icons.remove),
          ),
        ],
      ),
    );
  }
}

--

Route Usage #

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'ULoC Demo',
      initialRoute: Routes.HOME.name,
      onGenerateRoute: Routes.ulocRouteConfiguration.routeBuilder,
    );
  }
}

Lifecycle Hooks #

Each controller can optionally define lifecycle methods: You can setstate() in controller Each time setstate() is called, Widgets what are watching will be rerendered

@override
void onInit() {
  fetchData();
}

@override
void onReady() {
  showDialog();
  accessContext();
}

@override
void onDispose() {
  removeResource()
}

Find ancestor provider from previous pages #

Each controller can optionally define lifecycle methods: You can setstate() in controller Each time setstate() is called, Widgets what are watching will be rerendered

class MyController extends ULoCProvider{
  // find and use functions
  HomeController? homeController = findAncestorProviderOfType<HomeController>();

  // find and watch data
  String? get watchHomeData => findAncestorProviderOfType<HomeController>(listen: true)?.data;

  // find provider with exact location match
  HomeController? homeController = findAncestorProviderOfType<HomeController>(
    location: "/books/detail/the-invisible-man",
  );

  HomeController? homeController = findAncestorProviderOfType<HomeController>(
    location: Routes.DETAIL(id: "1"),
  );
}

Architecture Friendly #

ULoC fits into modern app structure:

• MVC — Controller handles logic, View is UI
• MVVM — Controller = ViewModel, View observes data changes
• Clean separation between logic and UI

Navigation, Deep Linking #

Named routes support :params like /user/:id. Navigate with:

class Home extends ULoCProvider {
  DetailController(super.context);

  void goToDetailHandle(){
    // named navigation
    getTo(Routes.Detail(id: '42'))
  }

  void goToDetailWithQueryHandle(){
    // named navigation with query
    getTo(Routes.Home.withQuery({ 'utm_source': 'facebook'}))
  }

  void goToCustomPage(){
    // widget navigation with query
    addRoute(
      WidgetPage(),
      provider: (context) => WidgetController(context),
      name: 'custom_route'.withQuery({ 'utm_source': 'facebook'}),
    );
  }
}

Works with Firebase Dynamic Links, URI parsers, etc.

  class DynamicLinkHandler{
    precessLink(String? url){
      final route = Routes.fromString(url)

      if(isAppRoute){
        getTo(route)

        // OR

        return await Navigator.of(
            context,
          ).pushNamed<T>(url);

      } else {
        // other process
      }
    }
  }

❤️ Contributing #

Feel free to:

• Submit bug reports or ideas
• Open pull requests
• Improve the ecosystem

📄 License #

MIT License © NGUYEN HAI DANG