/// <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>
/// Builds BitMap value of Message to Send
/// </summary>
/// <param name="bitMapField">bitmap field properties</param>
/// <param name="orderedFields">ordered fields positions</param>
/// <returns>byte array bitMap value</returns>
private byte[] BuildBitMap(IIsoFieldProperties bitMapField, IEnumerable <int> orderedFields)
{
var secondBitRequired = orderedFields.Any(pos => pos > 65 && pos < 128);
char[] bitmapBinaryArray = null;
if (secondBitRequired)
{
bitmapBinaryArray = new char[129];
bitmapBinaryArray[1] = '1';
}
else
{
bitmapBinaryArray = new char[65];
bitmapBinaryArray[1] = '0';
}
//Building BitMap
for (var i = 2; i < bitmapBinaryArray.Length; i++)
{
if (orderedFields.Contains(i))
{
bitmapBinaryArray[i] = '1';
}
else
{
bitmapBinaryArray[i] = '0';
}
}
var bitmapString = new string(bitmapBinaryArray);
var bitMap = Convert.ToInt64(bitmapString.Substring(1, 64), 2).ToString("X").PadLeft(16, '0');
if (secondBitRequired)
{
bitMap = bitMap + Convert.ToInt64(bitmapString.Substring(65, 64), 2).ToString("X").PadLeft(16, '0');
}
return(bitMapField.BuildFieldValue(bitMap));
}