view_model_provider.dart

import 'package:components/base/base_viewmodel.dart';

const registrationKey = 'registrationKey';
const loginKey = 'loginKey';
const forgotPasswordKey = 'forgotPasswordKey';
const homeKey = 'homeKey';
const servicesKey = 'servicesKey';
const inboxKey = 'inboxKey';
const visitsKey = 'visitsKey';
const notificationKey = 'notificationKey';
const patientProfileKey = 'patientProfileKey';

// ignore: avoid_classes_with_only_static_members
class ViewModelProvider {
  static final _map = <String, dynamic>{};

  static T getOrCreate<T>({String key, T Function() create}) {
    assert(key != null, 'id must not be null');
    assert(create != null, 'create must not be null');

    _map.putIfAbsent(key, () => create.call());

    return _map[key];
  }

  static void delete(String key) {
    final viewModel = _map[key];
    if (viewModel is BaseViewModel) {
      viewModel.onRemove();
    }
    _map.remove(key);
  }

  static void clear() {
    _map.forEach((key, value) {
      delete(key);
    });
  }
}