std::shared_ptr MqttClient::NewConnection()

in source/iot/MqttClient.cpp [392:437]
39 lines of code
9 McCabe index (conditional complexity)

        std::shared_ptr<Crt::Mqtt::MqttConnection> MqttClient::NewConnection(
            const MqttClientConnectionConfig &config) noexcept
        {
            if (!config)
            {
                m_lastError = config.LastError();
                return nullptr;
            }

            bool useWebsocket = config.m_webSocketInterceptor.operator bool();
            auto newConnection = m_client.NewConnection(
                config.m_endpoint.c_str(), config.m_port, config.m_socketOptions, config.m_context, useWebsocket);

            if (!newConnection)
            {
                m_lastError = m_client.LastError();
                return nullptr;
            }

            if (!(*newConnection))
            {
                m_lastError = newConnection->LastError();
                return nullptr;
            }

            if (!config.m_username.empty() || !config.m_password.empty())
            {
                if (!newConnection->SetLogin(config.m_username.c_str(), config.m_password.c_str()))
                {
                    m_lastError = newConnection->LastError();
                    return nullptr;
                }
            }

            if (useWebsocket)
            {
                newConnection->WebsocketInterceptor = config.m_webSocketInterceptor;
            }

            if (config.m_proxyOptions)
            {
                newConnection->SetHttpProxyOptions(config.m_proxyOptions.value());
            }

            return newConnection;
        }