public async Task ReadMessages(PipeReader reader, PacketSource packetSource, CancellationToken ct = default)
{
try
{
while (!ct.IsCancellationRequested)
{
var msg = await reader.ReadAsync(ct).ConfigureAwait(false);
if (msg.IsCompleted || msg.IsCanceled || ct.IsCancellationRequested)
{
break;
}
if (!TryReadFromBuffer(msg.Buffer, out PacketHeader header, out int headerBytesRead))
{
reader.AdvanceTo(msg.Buffer.Start, msg.Buffer.End);
}
else
{
switch (header.PacketId)
{
case PacketHeader.PacketType.Session:
if (HandleMessageAndAdvanceBuffer <PacketSessionData>(out var pSessionData))
{
_packetHandler.OnPacketSessionData(ref pSessionData, packetSource);
}
break;
case PacketHeader.PacketType.CarSetups:
HandleMessageAndAdvanceBuffer <PacketCarSetupData>(out var pCarSetup);
{
_packetHandler.OnPacketCarSetupData(ref pCarSetup, packetSource);
}
break;
case PacketHeader.PacketType.CarStatus:
HandleMessageAndAdvanceBuffer <PacketCarStatusData>(out var pCarStatus);
{
_packetHandler.OnPacketCarStatusData(ref pCarStatus, packetSource);
}
break;
case PacketHeader.PacketType.CarTelemetry:
HandleMessageAndAdvanceBuffer <PacketCarTelemetryData>(out var pTelemetry);
{
_packetHandler.OnPacketCarTelemetryData(ref pTelemetry, packetSource);
}
break;
case PacketHeader.PacketType.Event:
if (HandleMessageAndAdvanceBuffer <PacketEventData>(out var pEvent))
{
_packetHandler.OnPacketEventData(ref pEvent, packetSource);
}
break;
case PacketHeader.PacketType.LapData:
HandleMessageAndAdvanceBuffer <PacketLapData>(out var pLap);
{
_packetHandler.OnPacketLapData(ref pLap, packetSource);
}
break;
case PacketHeader.PacketType.Motion:
HandleMessageAndAdvanceBuffer <PacketMotionData>(out var pMotion);
{
_packetHandler.OnPacketMotionData(ref pMotion, packetSource);
}
break;
case PacketHeader.PacketType.Participants:
HandleMessageAndAdvanceBuffer <PacketParticipantsData>(out var pParticipants);
{
_packetHandler.OnPacketParticipantsData(ref pParticipants, packetSource);
}
break;
default:
throw new InvalidOperationException(
$"Unsupported packet id {header.PacketId}, message should have been filtered before");
}
}
bool HandleMessageAndAdvanceBuffer <T>(out T sessionData) where T : struct
{
if (!TryReadFromBuffer <T>(msg.Buffer, out sessionData, out int bytesRead))
{
reader.AdvanceTo(msg.Buffer.Start, msg.Buffer.End);
return(false);
}
if (Logger.IsDebugEnabled)
{
Logger.DebugFormat("Successfully parsed {0}: {1}", typeof(T).Name, sessionData);
}
reader.AdvanceTo(msg.Buffer.GetPosition(bytesRead));
return(true);
}
}