/// <summary>
/// Adds message bytes the rest of the Fields
/// </summary>
/// <param name="orderedFieldPositions">fields that need to be builded</param>
/// <param name="message">message instance</param>
/// <param name="messageBytes">message bytes as Ref</param>
private void BuildFields(IEnumerable <int> orderedFieldPositions, IIsoMessage message, ref List <byte> messageBytes)
{
foreach (var fieldPosition in orderedFieldPositions)
{
IIsoFieldProperties fieldProperties = message.GetFieldByPosition(fieldPosition);
if (fieldProperties != null)
{
var valueForMessage = fieldProperties.Value;
_validator?.EnsureContent(fieldProperties);
_validator?.EnsureLength(fieldProperties);
if (fieldProperties is IsoField isoField && isoField.Tags != null)
{
IEnumerable <byte> customFieldBytes = BuildTagFields(isoField);
messageBytes.AddRange(fieldProperties.BuildCustomFieldLentgh(customFieldBytes.Count().ToString()));
messageBytes.AddRange(customFieldBytes);
}
else
{
messageBytes.AddRange(fieldProperties.BuildFieldValue(valueForMessage.ToString()));
}
}
}
/// <summary>
/// Parse Iso Message bytes to IIsoMessage object
/// </summary>
/// <param name="isoMessageBytes">bytes to parse</param>
/// <param name="isoMessage">iso message object</param>
/// <returns>an IISOMessage object</returns>
public IIsoMessage Parse(byte[] isoMessageBytes, IIsoMessage isoMessage)
{
var currentPosition = 0;
isoMessage.MTI.Value = isoMessage.MTI.GetFieldValue(isoMessageBytes, ref currentPosition);
isoMessage.BitMap.Value = ParseBitMap(isoMessage.BitMap, isoMessageBytes, ref currentPosition);
ParseFields(ref isoMessage, isoMessageBytes, currentPosition);
//Keep Only Fields with values,
isoMessage.IsoFieldsCollection = isoMessage.IsoFieldsCollection.Where(p => p.Value != null).ToList();
return(isoMessage);
}
/// <summary>
/// Build byte from IIsoMessage
/// </summary>
/// <param name="message">IIsoMessage instance</param>
/// <returns>byte array of builded message</returns>
public byte[] Build(IIsoMessage message)
{
//Get Only Fields that Have values or Tags Defined with values
IEnumerable <int> orderedFieldPositions = message.IsoFieldsCollection
.Where(c => c.Value != null || (c.Tags?.Count > 0 && c.Tags.Any(tag => tag.Value != null))).Select(c => (int)c.Position);
var mtiBytes = message.MTI.BuildFieldValue(message.MTI.Value);
var messageBytes = new List <byte>(mtiBytes);
messageBytes.AddRange(BuildBitMap(message.BitMap, orderedFieldPositions));
IEnumerable <int> fieldsToBuild = orderedFieldPositions.Where(pos => pos != (int)IsoFields.F1 && pos != (int)IsoFields.BitMap && pos != (int)IsoFields.MTI);
BuildFields(fieldsToBuild, message, ref messageBytes);
return(messageBytes.ToArray());
}
