import 'package:flutter/material.dart';

import 'plugins/desktop/desktop.dart';
import 'ui/home/screen.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData.light(),
      darkTheme: ThemeData.dark(),
      home: HomeScreen(),
    );
  }
}

import 'package:flutter/material.dart';

import '../counter/screen.dart';
import '../todo/screen.dart';

class HomeScreen extends StatefulWidget {
  @override
  _HomeScreenState createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  int _currentIndex = 0;

@override
  Widget build(BuildContext context) {
    return Scaffold(
      body: IndexedStack(
        index: _currentIndex,
        children: <Widget>[
          CounterScreen(),
          TodosScreen(),
        ],
      ),
      bottomNavigationBar: BottomNavigationBar(
        currentIndex: _currentIndex,
        onTap: (val) {
          if (mounted)
            setState(() {
              _currentIndex = val;
            });
        },
        type: BottomNavigationBarType.fixed,
        items: [
          BottomNavigationBarItem(
            icon: Icon(Icons.add),
            title: Text('Counter'),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.list),
            title: Text('Todos'),
          ),
        ],
      ),
    );
  }
}

import 'package:flutter/material.dart';
import 'package:shared_dart/src/models/counter.dart';

class CounterScreen extends StatefulWidget {
  @override
  _CounterScreenState createState() => _CounterScreenState();
}

class _CounterScreenState extends State<CounterScreen> {
  CounterModel _counterModel = CounterModel();

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.
      _counterModel.add();
    });
  }

@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 MyCounterPage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text('Counter Screen'),
      ),
      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(
              '${_counterModel.count}',
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

class CounterModel {
  CounterModel();

  int _count = 0;

  int get count => _count;

  void add() => _count++;

  void subtract() => _count--;

  void set(int val) => _count = val;
}

import 'package:flutter/material.dart';

import '../../src/classes/todo.dart';
import '../../src/models/todos.dart';

class TodosScreen extends StatefulWidget {
  @override
  _TodosScreenState createState() => _TodosScreenState();
}

class _TodosScreenState extends State<TodosScreen> {
  final _model = TodosModel();
  List<ToDo> _todos;

@override
  void initState() {
    _model.getList().then((val) {
      if (mounted)
        setState(() {
          _todos = val;
        });
    });
    super.initState();
  }

@override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Todos Screen'),
      ),
      body: Builder(
        builder: (_) {
          if (_todos != null) {
            return ListView.builder(
              itemCount: _todos.length,
              itemBuilder: (context, index) {
                final _item = _todos[index];
                return ListTile(
                  title: Text(_item.title),
                  subtitle: Text(_item.completed ? 'Completed' : 'Pending'),
                );
              },
            );
          }
          return Center(
            child: CircularProgressIndicator(),
          );
        },
      ),
    );
  }
}

// To parse this JSON data, do
//
//     final toDo = toDoFromJson(jsonString);

import 'dart:convert';

List<ToDo> toDoFromJson(String str) => List<ToDo>.from(json.decode(str).map((x) => ToDo.fromJson(x)));

String toDoToJson(List<ToDo> data) => json.encode(List<dynamic>.from(data.map((x) => x.toJson())));

class ToDo {
    int userId;
    int id;
    String title;
    bool completed;

ToDo({
        this.userId,
        this.id,
        this.title,
        this.completed,
    });

factory ToDo.fromJson(Map<String, dynamic> json) => ToDo(
        userId: json["userId"],
        id: json["id"],
        title: json["title"],
        completed: json["completed"],
    );

Map<String, dynamic> toJson() => {
        "userId": userId,
        "id": id,
        "title": title,
        "completed": completed,
    };
}

import 'dart:convert';

import 'package:http/http.dart' as http;
import 'package:shared_dart/src/classes/todo.dart' as t;

class TodosModel {
  final kTodosUrl = '[https://jsonplaceholder.typicode.com/todos'](https://jsonplaceholder.typicode.com/todos');

Future<List<t.ToDo>> getList() async {
    final _response = await http.get(kTodosUrl);
    if (_response != null) {
      final _todos = t.toDoFromJson(_response.body);
      if (_todos != null) {
        return _todos;
      }
    }
    return [];
  }

Future<t.ToDo> getItem(int id) async {
    final _response = await http.get('$kTodosUrl/$id');
    if (_response != null) {
      final _todo = t.ToDo.fromJson(json.decode(_response.body));
      if (_todo != null) {
        return _todo;
      }
    }
    return null;
  }
}

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Create another file at the root called service.yaml and add the following:

Replace PROJECT\_NAME with your project name, mine is shared-dart for this example.

You will also need to replace YOUR\_DOCKER\_NAME with your docker username so the container can be deployed correctly.

Update your pubspec.yaml with the following:

The important package here is shelf as it allows us to run a http server with dart.

Create a folder in the root of the project called bin then add a file server.dart and replace it with the following:

This will tell the container what port to listen for and how to handle the requests.

Create a folder src in the bin folder and add a file routing.dart and replace the contents with the following:

There is still nothing imported from our main project but you will start to see some similarities. Here we specify controllers for todos and counter url paths.

that means any url with the following:[https://mydomain.com/todos](https://mydomain.com/todos) , [https://mydomain.com/todos](https://mydomain.com/todos)/1

will get routed to the TodoController to handle the request.

> This is also the first time I found out about FutureOr. It allows you to return a sync or async function.

And important part about build a REST API is having a consistent response body, so here we can create a wrapper that adds fields we always want to return, like the status of the call, a message and the body.

Create a file at src/result.dart and add the following:

This will always return json and the fields that we want to show. You could also include your paging meta data here.

Create a file in at the location src/controllers/counter.dart and add the following:

You will see the import to the lib folder of the root project. Since it shares the pubspec.yaml all the packages can be shared. You can import the CounterModel that we created earlier.

Create a file in at the location src/controllers/todos.dart and add the following:

Just like before we are importing the TodosModel model from the lib folder.

For convenience add a file at the location src/controllers/index.dart and add the following:

This will make it easier to import all the controllers.

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: [https://go.microsoft.com/fwlink/?linkid=830387](https://go.microsoft.com/fwlink/?linkid=830387)
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Client",
            "request": "launch",
            "type": "dart",
            "program": "lib/main.dart"
        }, 
          {
            "name": "Server",
            "request": "launch",
            "type": "dart",
            "program": "bin/server.dart"
        }
    ]
}