/// <summary>
/// Create a request for GCR. <seealso cref="GcrRequest"/>
/// </summary>
/// <param name="transactionType">Transaction type, e. g. credit/debit</param>
/// <param name="amount">Transaction amount</param>
/// <returns>A corresponding <see cref="GcrRequest"/></returns>
private GcrRequest CreateGcrRequest(TransactionType transactionType, decimal amount)
{
// Assembling GCR command request:
GcrRequest request = new GcrRequest();
// TODO: flag de acquirer.
request.GCR_ACQIDXREQ.Value = (int)StoneIndexCode.Application;
if (transactionType != TransactionType.Undefined)
{
request.GCR_APPTYPREQ.Value = (int)transactionType;
}
else
{
request.GCR_APPTYPREQ.Value = 99;
}
request.GCR_AMOUNT.Value = Convert.ToInt64(amount * 100);
request.GCR_DATE_TIME.Value = DateTime.Now;
// Retieving current EMV table version from pinpad:
string emvTableVersion = this.EmvTable.GetEmvTableVersion();
Debug.WriteLine("EMV table version: <{0}>", emvTableVersion);
if (emvTableVersion == null)
{
// There's no table version, therefore tables cannot be reached.
return(null);
}
// If it's a valid EMV table version, then adds it to the command:
request.GCR_TABVER.Value = emvTableVersion;
return(request);
}
/// <summary>
/// Read basic card information, that is, brand id, card type, card primary account number (PAN), cardholder name and expiration date.
/// If the card is removed in the middle of the process, returns CANCEL status.
/// </summary>
/// <param name="transactionType">Transaction type, that is, debit/credit.</param>
/// <param name="amount">Transaction amount.</param>
/// <param name="cardRead">Card to be read.</param>
/// <param name="newTransactionType">New transaction type read throgh ABECS protocol.</param>
/// <param name="cardBrands">List of brands supported.</param>
/// <returns>Operation status.</returns>
private AbecsResponseStatus PerformCardReading(TransactionType transactionType,
decimal amount, out CardEntry cardRead, out TransactionType newTransactionType,
IList <PinpadCardBrand> cardBrands)
{
cardRead = null;
newTransactionType = transactionType;
GcrRequest request = this.CreateGcrRequest(transactionType, amount);
// There's no table version, therefore tables cannot be reached.
if (request == null)
{
return(AbecsResponseStatus.ST_TABERR);
}
// Sending and receiving response.
Debug.WriteLine("Sending GCR command <{0}>", request.CommandString);
GcrResponse response = this.pinpadCommunication.SendRequestAndReceiveResponse <GcrResponse>(request);
// If timeout was reached:
if (response == null)
{
return(AbecsResponseStatus.ST_TIMEOUT);
}
// If an error occurred:
else if (response.RSP_STAT.Value != AbecsResponseStatus.ST_OK)
{
return(response.RSP_STAT.Value);
}
// If the card has expired:
else if (response.GCR_CARDTYPE.Value == ApplicationType.MagneticStripe)
{
CardEntry tempCard;
// Verify if it is really a magnetic stripe card:
tempCard = CardMapper.MapCardFromTracks(response, cardBrands);
// TODO: Incluir o fallback nessa condição.
if (tempCard.Type != response.GCR_CARDTYPE.Value.ToCardType())
{
throw new CardHasChipException();
}
// Validate expired cards:
DateTime expirationDate = tempCard.ExpirationDate;
if (expirationDate < DateTime.Now)
{
throw new ExpiredCardException(expirationDate);
}
}
else if (response.GCR_CARDEXP.HasValue == false)
{
throw new ExpiredCardException(DateTime.MinValue);
}
// Saving the transaction type. This is handy if you have initiated the transaction without knowing the transaction type.
// In this situation, the user will select transaction type throgh the pinpad.
newTransactionType = (TransactionType)response.GCR_APPTYPE.Value;
// Saving command response status.
// Getting legacy response status code:
AbecsResponseStatus legacyStatus = response.RSP_STAT.Value;
// Mapping legacy status code into Pinpad.Sdk response status code.
this.LastCommandStatus = ResponseStatusMapper.MapLegacyResponseStatus(legacyStatus);
// Get card information and return it:
cardRead = CardMapper.MapCardFromTracks(response, cardBrands);
if (cardRead.Type == CardType.Emv)
{
if (this.EmvTable.AidTable.Count <= 0)
{
throw new InvalidTableException("AID table is empty.");
}
int brandId = cardRead.BrandId;
var aidVar = this.EmvTable.AidTable.First(a => a.TAB_RECIDX.Value.Value == brandId);
cardRead.ApplicationId = aidVar.T1_AID.Value.DataString;
// If it is a EMV transaction, then the application SHOULD send a CNG to change EMV parameters:
// TODO: Ver como o comando CNG funciona. Não retirar.
//if (response.GCR_CARDTYPE.Value == ApplicationType.IccEmv)
//{
// CngRequest cng = new CngRequest();
// cng.CNG_EMVDAT.Value = ((...))
// bool stats = this.pinpadCommunication.SendRequestAndVerifyResponseCode(cng);
//}
}
return(AbecsResponseStatus.ST_OK);
}
