fairnesscoop / permacoop

import { buildMessage, isPhoneNumber, ValidateBy } from 'class-validator';

// Don't validate if '' is received.

// See: https://github.com/typestack/class-validator/issues/232

export function IsPhoneNumberOrEmpty(region?: string): any {

  return ValidateBy({

    name: 'isPhoneNumberOrEmpty',

    constraints: [region],

    validator: {

      validate: (value, args) => {

        return value === '' || isPhoneNumber(value, args.constraints[0]);

      },

      defaultMessage: buildMessage(

        eachPrefix => eachPrefix + '$property must be a valid phone number'

      )

    }

  });

}