@Injectable()
export class NgbDateNativeAdapter extends NgbDateAdapter<Date> {
  fromModel(date: Date): NgbDateStruct {
    if (!date) {
      return null;
    }
    return (date && date.getFullYear) ? {year: date.getFullYear(), month: date.getMonth() + 1, day: date.getDate()} : null;
  }

  toModel(date: NgbDateStruct): Date {
    if (!date) {
      return null;
    }
    return date ? new Date(date.year, date.month - 1, date.day) : null;
  }
}


@Injectable()
export class MMDDYYYYParserFormatter extends NgbDateParserFormatter {
  parse(value: string): NgbDateStruct {
    if (!value) {
      return null;
    }
    const d = moment(value, 'MM/DD/YYYY');
    return d.isValid()
      ? {
        year: d.year(),
        month: d.month() + 1,
        day: d.date()
      } : null;
  }

  format(date: NgbDateStruct): string {
    if (!date) {
      return '';
    }
    const d = moment({
      year: date.year,
      month: date.month - 1,
      date: date.day
    });
    return d.isValid()
      ? d.format('MM/DD/YYYY')
      : '';
  }
}