Angular2 Forms with @ngrx/store

BaseForm.ts

export class _BaseForm {
  _builder: FormBuilder;
  _group: ControlGroup;

  public controls = (value: any = {}) => ({
  });
  public selector: string = "examples";
  public store: Store<any>;

  constructor() { }

  init(value?: number, key: string = "id") {
    this.store.select(state => state.models[this.selector])
      .flatMap((items: any, i) => items)
      .filter((item: any) => {
        return (value !== undefined && item.hasOwnProperty(key)) ? item[key] === value : true;
      })
      .subscribe(value => {
        this.store.dispatch({ type: "ACTIVATE_FORM", payload: value });
      });

    this.store.select(state => state.forms.active).first()
      .subscribe(value => {
        this._group = this._builder.group(this.controls(value));

        let payload = {};
            payload[this.selector] = value;
        this.store.dispatch({ type: "UPDATE_FORM", payload });
      });
  }

  reset() {
    let values  = this.store.value.forms.active;
    this._group = this._builder.group(this.controls(values));
  }

  ngOnDestroy() {
    this.store.dispatch({ type: "ACTIVATE_FORM", payload: {} });
  }

}

ProjectsForm.ts

export class ProjectForm extends _BaseForm {
  _builder: FormBuilder;
  _group: ControlGroup;

  public controls = (value: any = {}) => ({
    'id': [value.id],
    'name': [value.name, Validators.required]
  });
  public selector: string = "projects";

  constructor(
    public store: Store<any>,
    formBuilder: FormBuilder,
  ) {
    super();
    this._builder = formBuilder;
    this.init();
  }
  get projectsForm() { return this._group; }
  submit() { }
}