private void ParseTrack1()
{
if (String.IsNullOrEmpty(_track1Data))
{
throw new MagstripCardParseException("Track 1 data is empty.");
}
string[] parts = _track1Data.Split(new char[] { FIELD_SEPARATOR }, StringSplitOptions.None);
if (parts.Length != 3)
{
throw new MagstripCardParseException("Missing last field separator (^) in track 1 data.");
}
_accountNumber = CreditCardUtils.StripNonDigits(parts[0]);
if (!String.IsNullOrEmpty(parts[1]))
{
_accountHolder = parts[1].Trim();
}
if (!String.IsNullOrEmpty(_accountHolder))
{
int nameDelim = _accountHolder.IndexOf("/");
if (nameDelim > -1)
{
_lastName = _accountHolder.Substring(0, nameDelim);
_firstName = _accountHolder.Substring(nameDelim + 1);
}
}
//date format: YYMM
string expDate = parts[2].Substring(0, 4);
_expYear = ParseExpireYear(expDate);
_expMonth = ParseExpireMonth(expDate);
}
private int ParseExpireMonth(string s)
{
s = CreditCardUtils.StripNonDigits(s);
if (!ValidateExpiration(s))
{
return(0);
}
if (s.Length > 4)
{
s = s.Substring(0, 4);
}
return(int.Parse(s.Substring(2, 2)));
}
private void ParseTrack2()
{
if (String.IsNullOrEmpty(_track2Data))
{
throw new MagstripCardParseException("Track 2 data is empty.");
}
if (_track2Data.StartsWith(";"))
{
_track2Data = _track2Data.Substring(1);
}
//may have already parsed this info out if track 1 data present
if (String.IsNullOrEmpty(_accountNumber) || (_expMonth == 0 || _expYear == 0))
{
//Track 2 only cards
//Ex: ;1234123412341234=0305101193010877?
int sepIndex = _track2Data.IndexOf('=');
if (sepIndex < 0)
{
throw new MagstripCardParseException("Invalid track 2 data.");
}
string[] parts = _track2Data.Split(new char[] { '=' }, StringSplitOptions.RemoveEmptyEntries);
if (parts.Length != 2)
{
throw new MagstripCardParseException("Missing field separator (=) in track 2 data.");
}
if (String.IsNullOrEmpty(_accountNumber))
{
_accountNumber = CreditCardUtils.StripNonDigits(parts[0]);
}
if (_expMonth == 0 || _expYear == 0)
{
//date format: YYMM
string expDate = parts[1].Substring(0, 4);
_expYear = ParseExpireYear(expDate);
_expMonth = ParseExpireMonth(expDate);
}
}
}
private int ParseExpireYear(string s)
{
s = CreditCardUtils.StripNonDigits(s);
if (!ValidateExpiration(s))
{
return(0);
}
if (s.Length > 4)
{
s = s.Substring(0, 4);
}
int y = int.Parse(s.Substring(0, 2));
if (y > 80)
{
y += 1900;
}
else
{
y += 2000;
}
return(y);
}
