/**
 * A phone number as the server keeps it: digits, spaces and + ( ) - . /,
 * five digits at least. Words ("call us") are no number to call.
 */
export const isPhoneOrEmpty = (value: string): boolean => {
  const phone = value.trim().replace(/\s+/g, ' ');
  return (
    phone === '' ||
    (/^\+?[\d\s()./-]{5,40}$/.test(phone) &&
      (phone.match(/\d/g) ?? []).length >= 5)
  );
};

export const PHONE_ERROR =
  'A phone number: digits, with spaces, +, ( ), - or . between them.';