public async Task ExecuteAsync(string clientId, IPacket input, IMqttChannel <IPacket> channel)
{
if (input.Type != MqttPacketType.Connect)
{
return;
}
Connect connect = input as Connect;
if (!_authenticationProvider.Authenticate(clientId, connect.UserName, connect.Password))
{
throw new MqttConnectionException(MqttConnectionStatus.BadUserNameOrPassword);
}
ClientSession session = _sessionRepository.Read(clientId);
bool sessionPresent = connect.CleanSession ? false : session != null;
_tracer.Info($"Client connecting with protocol level {connect.ProtocolLelvel}.");
if (connect.CleanSession && session != null)
{
_sessionRepository.Delete(session.Id);
session = null;
_tracer.Info(ServerProperties.Server_CleanedOldSession(clientId));
}
bool sendPendingMessages = false;
if (session == null)
{
session = new ClientSession(clientId, connect.CleanSession);
_sessionRepository.Create(session);
_tracer.Info(ServerProperties.Server_CreatedSession(clientId));
}
else
{
sendPendingMessages = true;
}
if (connect.Will != null)
{
ConnectionWill connectionWill = new ConnectionWill(clientId, connect.Will);
_willRepository.Create(connectionWill);
}
await channel.SendAsync(new ConnectAck( MqttConnectionStatus.Accepted, sessionPresent ));
if (sendPendingMessages)
{
await SendPendingMessagesAsync(session, channel);
await SendPendingAcknowledgementsAsync(session, channel);
}
}
