nestjs-api-tools/src/transformers/date-time.transformer.ts

Wrappers for convenient API development including validation, logging and i18n wrappers

import {DateTime} from 'luxon';
import {ValueTransformer} from 'typeorm';
import {parseDateTime} from '../utils';

export class DateTimeTransformer implements ValueTransformer {

  public from(value: DateTime | Date | string | number): any {
    return parseDateTime(value);
  }

  public to(value: DateTime | Date | string): any {
    const format = 'yyyy-MM-dd HH:mm:ssZ';

    if (value instanceof DateTime) {
      return value.toFormat(format);
    }

    if (value instanceof Date) {
      return DateTime.fromJSDate(value).toFormat(format);
    }

    if (!value || value.toString().match(/^([+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-2])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24:?00)([.,]\d+(?!:))?)?(\17[0-5]\d([.,]\d+)?)?([zZ]|([+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/)) {
      return value as string;
    }
  }
}