private void ValidateAlternativeSchemes()
{
List <AlternativeScheme> schemesOut = null;
if (_billIn.AlternativeSchemes != null)
{
schemesOut = new List <AlternativeScheme>();
foreach (AlternativeScheme schemeIn in _billIn.AlternativeSchemes)
{
AlternativeScheme schemeOut = new AlternativeScheme
{
Name = schemeIn.Name.Trimmed(),
Instruction = schemeIn.Instruction.Trimmed()
};
if ((schemeOut.Name != null || schemeOut.Instruction != null) &&
ValidateLength(schemeOut.Instruction, 100, ValidationConstants.FieldAlternativeSchemes))
{
schemesOut.Add(schemeOut);
}
}
if (schemesOut.Count > 0)
{
if (schemesOut.Count > 2)
{
_validationResult.AddMessage(MessageType.Error, ValidationConstants.FieldAlternativeSchemes, ValidationConstants.KeyAltSchemeExceeded);
schemesOut = schemesOut.GetRange(0, 2);
}
}
else
{
schemesOut = null;
}
}
_billOut.AlternativeSchemes = schemesOut;
}
/// <summary>
/// Decodes the specified text and returns the bill data.
/// <para>
/// The text is assumed to be in the data structured for the QR code defined by SIX.
/// </para>
/// <para>
/// The returned data is only minimally validated. The format and the header are
/// checked. Amount and date must be parsable.
/// </para>
/// </summary>
/// <param name="text">The text to decode.</param>
/// <returns>The decoded bill data.</returns>
/// <exception cref="QRBillValidationException">The text is in an invalid format.</exception>
public static Bill Decode(string text)
{
string[] lines = SplitLines(text);
if (lines.Length < 31 || lines.Length > 34)
{
// A line feed at the end is illegal (cf 4.2.3) but found in practice. Don't be too strict.
if (!(lines.Length == 35 && lines[34].Length == 0))
{
ThrowSingleValidationError(ValidationConstants.FieldQrType, ValidationConstants.KeyValidDataStructure);
}
}
if ("SPC" != lines[0])
{
ThrowSingleValidationError(ValidationConstants.FieldQrType, ValidationConstants.KeyValidDataStructure);
}
if ("0200" != lines[1])
{
ThrowSingleValidationError(ValidationConstants.FieldVersion, ValidationConstants.KeySupportedVersion);
}
if ("1" != lines[2])
{
ThrowSingleValidationError(ValidationConstants.FieldCodingType, ValidationConstants.KeySupportedCodingType);
}
Bill billData = new Bill
{
Version = Bill.QrBillStandardVersion.V2_0,
Account = lines[3],
Creditor = DecodeAddress(lines, 4, false)
};
if (lines[18].Length > 0)
{
if (decimal.TryParse(lines[18], NumberStyles.Number, AmountNumberInfo, out decimal amount))
{
billData.Amount = amount;
}
else
{
ThrowSingleValidationError(ValidationConstants.FieldAmount, ValidationConstants.KeyValidNumber);
}
}
else
{
billData.Amount = null;
}
billData.Currency = lines[19];
billData.Debtor = DecodeAddress(lines, 20, true);
// reference type is ignored (line 27)
billData.Reference = lines[28];
billData.UnstructuredMessage = lines[29];
if ("EPD" != lines[30])
{
ThrowSingleValidationError(ValidationConstants.FieldTrailer, ValidationConstants.KeyValidDataStructure);
}
billData.BillInformation = lines.Length > 31 ? lines[31] : "";
List <AlternativeScheme> alternativeSchemes = null;
int numSchemes = lines.Length - 32;
// skip empty schemes at end (due to invalid trailing line feed)
if (numSchemes > 0 && lines[32 + numSchemes - 1].Length == 0)
{
numSchemes--;
}
if (numSchemes > 0)
{
alternativeSchemes = new List <AlternativeScheme>();
for (int i = 0; i < numSchemes; i++)
{
AlternativeScheme scheme = new AlternativeScheme
{
Instruction = lines[32 + i]
};
alternativeSchemes.Add(scheme);
}
}
billData.AlternativeSchemes = alternativeSchemes;
return(billData);
}
