todo.dart

library todo;

import 'package:angular/angular.dart';


class Item {
  String text;
  bool done;

  Item([String this.text = '', bool this.done = false]);

  bool get isEmpty => text.isEmpty;

  clone() => new Item(text, done);

  clear() {
    text = '';
    done = false;
  }
}


// ServerController interface. Logic in main.dart determines which
// implementation we should use.
abstract class ServerController {
  init(TodoController todo);
}


// An implementation of ServerController that does nothing.
class NoServerController implements ServerController {
  init(TodoController todo) { }
}


// An implementation of ServerController that fetches items from
// the server over HTTP.
class HttpServerController implements ServerController {
  final Http _http;
  HttpServerController(this._http);

  init(TodoController todo) {
    _http(method: 'GET', url: '/todos').then((HttpResponse data) {
      data.data.forEach((d) {
        todo.items.add(new Item(d["text"], d["done"]));
      });
    });
  }
}


@NgController(
  selector: '[todo-controller]',
  publishAs: 'todo'
)
class TodoController {
  List<Item> items;
  Item newItem;

  TodoController(ServerController serverController) {
    newItem = new Item();
    items = [
      new Item('Write Angular in Dart', true),
      new Item('Write Dart in Angular'),
      new Item('Do something useful')
    ];

    serverController.init(this);
  }

  add() {
    if (newItem.isEmpty) return;

    items.add(newItem.clone());
    newItem.clear();
  }

  markAllDone() {
    items.forEach((item) => item.done = true);
  }

  archiveDone() {
    items.removeWhere((item) => item.done);
  }

  String classFor(Item item) {
    return item.done ? 'done' : '';
  }

  int remaining() {
    return items.where((item) => !item.done).length;
  }
}