flutter_hexagonal_architecture 0.0.4

A new Flutter package for hexagonal architecture (clean code).

example/lib/main.dart

import 'package:example/core/use_cases/rents/create_rent_use_case.dart';
import 'package:example/core/use_cases/videos/create_video_use_case.dart';
import 'package:example/infrastructure/entities/rents.dart';
import 'package:example/infrastructure/entities/user.dart';
import 'package:example/infrastructure/entities/video.dart';
import 'package:flutter/material.dart';
import 'package:flutter_hexagonal_architecture/flutter_hexagonal_architecture.dart';
import 'core/use_cases/users/create_user_use_case.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> {
  bool _isUserAdded = false;
  bool _isVideoAdded = false;
  bool _isVideoRented = false;

  User _user;
  Video _video;
  Rent _rent;

  void _addUser() async {
    CreateUserUseCase useCase = new CreateUserUseCase();
    ObjectPresenter<User> presenter = new ObjectPresenter();
    await useCase.handle(
      new CreateUserRequest(null, 'me', 'me'),
      presenter,
    );

    setState(() {
      this._user = presenter.data;
      this._isUserAdded = true;
    });
  }

  void _addVideo() async {
    CreateVideoUseCase useCase = new CreateVideoUseCase();
    ObjectPresenter<Video> presenter = new ObjectPresenter();
    await useCase.handle(
      new CreateVideoRequest(null, 'The empire strikes back'),
      presenter,
    );

    setState(() {
      this._video = presenter.data;
      this._isVideoAdded = true;
    });
  }

  void _rentVideo() async {
    CreateRentUseCase useCase = new CreateRentUseCase();
    ObjectPresenter<Rent> presenter = new ObjectPresenter();
    await useCase.handle(
      new CreateRentRequest(this._user.id, this._video.id, DateTime.now()),
      presenter,
    );

    setState(() {
      this._rent = presenter.data;
      this._isVideoRented = true;
    });
  }

  @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>[
            MaterialButton(
              child: Text('Add me to users'),
              color: Colors.grey[400],
              onPressed: (!this._isUserAdded &&
                      !this._isVideoAdded &&
                      !this._isVideoRented)
                  ? this._addUser
                  : null,
            ),
            MaterialButton(
              child: Text('Add The empire strikes back to videos'),
              color: Colors.grey[400],
              onPressed: (this._isUserAdded &&
                      !this._isVideoAdded &&
                      !this._isVideoRented)
                  ? this._addVideo
                  : null,
            ),
            MaterialButton(
              child: Text('I rent The empire strikes back'),
              color: Colors.grey[400],
              onPressed: (this._isUserAdded &&
                      this._isVideoAdded &&
                      !this._isVideoRented)
                  ? this._rentVideo
                  : null,
            ),
          ],
        ),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}