export class DataService{
  private dataSource = new Subject();
  currentData = this.dataSource.asObservable();

  constructor(private http: HttpClient) {
    this.http.get('/api/v1/data').subscribe(data => {
      this.updateData(data);
    });
  }

  updateData(data) {
    this.dataSource.next(data);
  }
}