public static bool IsValid(string nationalId)
{
if (string.IsNullOrWhiteSpace(nationalId))
{
throw new ArgumentException($"'{nameof(nationalId)}' cannot be null or whitespace", nameof(nationalId));
}
nationalId = Digits.PersianToEnglishDigits(nationalId);
if (!NATIONAL_ID_PATTERN.IsMatch(nationalId))
{
throw new FormatException(nameof(nationalId));
}
var r = nationalId
.Take(9)
.Select((digit, index) => (digit - '0') * (10 - index))
.Sum() % 11;
return(nationalId.Last() == LAST_DIGIT[r]);
}
private static string CheckValidationAndExtract(string pan)
{
if (string.IsNullOrWhiteSpace(pan))
{
throw new ArgumentException($"'{nameof(pan)}' cannot be null or whitespace", nameof(pan));
}
string englishPan = Digits.PersianToEnglishDigits(pan);
englishPan = englishPan.Replace(" ", "")
.Replace("-", "")
.Replace("_", "")
.Replace(",", "");
if (englishPan.Count() != 16)
{
throw new ArgumentOutOfRangeException($"'{nameof(pan)}' should contains 16 digits.", nameof(pan));
}
if (!englishPan.All(x => char.IsDigit(x)))
{
throw new ArgumentException($"'{nameof(pan)}' contains invalid characters!", nameof(pan));
}
return(englishPan);
}