/// <summary>
/// Parses a MRZ string.
/// </summary>
/// <param name="mrz">The MRZ string to parse.</param>
/// <returns>The parsed MRZ data.</returns>
/// <seealso>
/// https://en.wikipedia.org/wiki/Machine-readable_passport
/// https://www.icao.int/publications/Documents/9303_p3_cons_en.pdf
/// </seealso>
public static MrzData Parse(string mrz)
{
if (mrz == null)
{
throw new ArgumentNullException(mrz);
}
else if (mrz.Length != 88)
{
throw new ArgumentException($"MRZ length is not valid. Should be 88 but it is {mrz.Length}", nameof(mrz));
}
var output = new MrzData
{
DocumentType = ParseDocumentType(mrz),
Gender = ParseGender(mrz),
ExpireDate = ParseExpireDate(mrz),
IssuingCountryIso = ParseIssuingCountryIso(mrz),
FirstName = ParseFirstName(mrz),
LastName = ParseLastName(mrz),
DocumentNumber = ParseDocumentNumber(mrz),
NationalityIso = ParseNationalityIso(mrz),
DateOfBirth = ParseDateOfBirth(mrz),
};
return(output);
}
/// <summary>
/// Creates an MRZ string from MRZ data.
/// </summary>
/// <param name="mrzData">The MRZ data.</param>
/// <returns>The MRZ string.</returns>
public static string CreatMrz(MrzData mrzData)
{
if (string.IsNullOrEmpty(mrzData.IssuingCountryIso))
{
throw PropertyArgumentException(mrzData.IssuingCountryIso, nameof(mrzData));
}
else if (string.IsNullOrEmpty(mrzData.LastName))
{
throw PropertyArgumentException(mrzData.LastName, nameof(mrzData));
}
else if (string.IsNullOrEmpty(mrzData.FirstName))
{
throw PropertyArgumentException(mrzData.FirstName, nameof(mrzData));
}
else if (string.IsNullOrEmpty(mrzData.DocumentNumber))
{
throw PropertyArgumentException(mrzData.DocumentNumber, nameof(mrzData));
}
else if (string.IsNullOrEmpty(mrzData.NationalityIso))
{
throw PropertyArgumentException(mrzData.NationalityIso, nameof(mrzData));
}
else if (string.IsNullOrEmpty(mrzData.Gender))
{
throw PropertyArgumentException(mrzData.Gender, nameof(mrzData));
}
else if (mrzData.DateOfBirth.Year < 1901)
{
throw new ArgumentException($"The {nameof(mrzData.DateOfBirth)} is less than 1901.", nameof(mrzData));
}
else if (mrzData.ExpireDate.Year < 1901)
{
throw new ArgumentException($"The {nameof(mrzData.ExpireDate)} is less than 1901.", nameof(mrzData));
}
var docType = mrzData.DocumentType;
if (docType.Length < 2)
{
docType += "<";
}
var line1 = docType + mrzData.IssuingCountryIso + (mrzData.LastName + "<<" + mrzData.FirstName).Replace(" ", "<");
line1 = line1.PadRight(44, '<').Replace("-", "<");
if (line1.Length > 44)
{
line1 = line1.Substring(0, 44);
}
var line2 = mrzData.DocumentNumber.PadRight(9, '<') + GetCheckDigit(mrzData.DocumentNumber.PadRight(9, '<')) + mrzData.NationalityIso +
mrzData.DateOfBirth.ToString(DateFormat) +
GetCheckDigit(mrzData.DateOfBirth.ToString(DateFormat)) + mrzData.Gender.Substring(0, 1) +
mrzData.ExpireDate.ToString(DateFormat) +
GetCheckDigit(mrzData.ExpireDate.ToString(DateFormat));
line2 = line2.PadRight(42, '<') + "0";
var compositeCheckDigit =
GetCheckDigit(line2.Substring(0, 10) + line2.Substring(13, 7) +
line2.Substring(21, 22));
line2 += compositeCheckDigit.Replace("-", "<");
return(line1 + line2);
}
