public IProtocolFlow GetFlow(MqttPacketType packetType)
{
if (!IsValidPacketType(packetType))
{
throw new MqttException(ClientProperties.ProtocolFlowProvider_InvalidPacketType(packetType));
}
ProtocolFlowType flowType = packetType.ToFlowType();
if (!GetFlows().TryGetValue(flowType, out IProtocolFlow flow))
{
throw new MqttException(ClientProperties.ProtocolFlowProvider_UnknownPacketType(packetType));
}
return(flow);
}
internal static ProtocolFlowType ToFlowType(this MqttPacketType packetType)
{
ProtocolFlowType flowType = default;
switch (packetType)
{
case MqttPacketType.Connect:
case MqttPacketType.ConnectAck:
flowType = ProtocolFlowType.Connect;
break;
case MqttPacketType.Publish:
case MqttPacketType.PublishRelease:
flowType = ProtocolFlowType.PublishReceiver;
break;
case MqttPacketType.PublishAck:
case MqttPacketType.PublishReceived:
case MqttPacketType.PublishComplete:
flowType = ProtocolFlowType.PublishSender;
break;
case MqttPacketType.Subscribe:
case MqttPacketType.SubscribeAck:
flowType = ProtocolFlowType.Subscribe;
break;
case MqttPacketType.Unsubscribe:
case MqttPacketType.UnsubscribeAck:
flowType = ProtocolFlowType.Unsubscribe;
break;
case MqttPacketType.PingRequest:
case MqttPacketType.PingResponse:
flowType = ProtocolFlowType.Ping;
break;
case MqttPacketType.Disconnect:
flowType = ProtocolFlowType.Disconnect;
break;
}
return(flowType);
}