validatePassword method

String? validatePassword (String password)

Implementation

static String? validatePassword(
  String password,
) \{
  If password is empty return.
  if (password.isEmpty) \{
    return "Password must not be left blank";
  \}
  const String pattern =
      r'^(?=.*?[A-Z])(?=.*?[0-9])(?=.*?[!@#\$&*%^~.]).\{8,\}$';
  final RegExp regExp = RegExp(pattern);

  Regex for no spaces allowed
  const String noSpaces = r'^\S+$';
  final RegExp noSpaceRegex = RegExp(noSpaces);

  if (!noSpaceRegex.hasMatch(password)) \{
    return "Password must not contain spaces";
  \}
  if (!regExp.hasMatch(password)) \{
    return "Your password must be at least 8 characters long, contain at least one numeric, one uppercase and one lowercase letters and one special character (@,#,\$,etc.)";
  \}

  return null;
\}