GatewayClientError.h

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#ifndef GATEWAY_CLIENT_ERROR_H
#define GATEWAY_CLIENT_ERROR_H

#include "ConfigFrame.h"
#include <memory>

class GatewayClientError: public ConfigFrame {
public:
    static GatewayClientError Create(uint16_t a_ReferenceNbr, uint16_t a_ErrorCode) {
        GatewayClientError l_GatewayClientError;
        l_GatewayClientError.m_ReferenceNbr = a_ReferenceNbr;
        l_GatewayClientError.m_ErrorCode = a_ErrorCode;
        return l_GatewayClientError;
    }

    static std::shared_ptr<GatewayClientError> CreateDeserializedFrame() {
        auto l_GatewayClientError(std::shared_ptr<GatewayClientError>(new GatewayClientError));
        l_GatewayClientError->m_eDeserialize = DESERIALIZE_BODY;
        l_GatewayClientError->m_BytesRemaining = 5; // Next: read body including the frame type byte
        return l_GatewayClientError;
    }

    // Getter
    uint16_t GetReferenceNbr() const {
        assert(m_eDeserialize == DESERIALIZE_FULL);
        return m_ReferenceNbr;
    }

    uint16_t GetErrorCode() const {
        assert(m_eDeserialize == DESERIALIZE_FULL);
        return m_ErrorCode;
    }

private:
    // Private CTOR
    GatewayClientError(): m_ReferenceNbr(0), m_ErrorCode(0), m_eDeserialize(DESERIALIZE_FULL) {
    }

    // Methods
    E_CONFIG_FRAME GetConfigFrameType() const { return CONFIG_FRAME_GATEWAY_CLIENT_ERROR; }

    // Serializer
    const std::vector<unsigned char> Serialize() const {
        assert(m_eDeserialize == DESERIALIZE_FULL);
        std::vector<unsigned char> l_Buffer;
        l_Buffer.emplace_back(CONFIG_FRAME_GATEWAY_CLIENT_ERROR);
        l_Buffer.emplace_back((m_ReferenceNbr >> 8) & 0xFF);
        l_Buffer.emplace_back((m_ReferenceNbr >> 0) & 0xFF);
        l_Buffer.emplace_back((m_ErrorCode    >> 8) & 0xFF);
        l_Buffer.emplace_back((m_ErrorCode    >> 0) & 0xFF);
        return l_Buffer;
    }

    // Deserializer
    bool Deserialize() {
        // All requested bytes are available
        switch (m_eDeserialize) {
        case DESERIALIZE_BODY: {
            // Deserialize the body including the frame type byte
            assert(m_Buffer.size() == 5);
            assert(m_Buffer[0] == CONFIG_FRAME_GATEWAY_CLIENT_ERROR);
            m_ReferenceNbr = ntohs(*(reinterpret_cast<const uint16_t*>(&m_Buffer[1])));
            m_ErrorCode    = ntohs(*(reinterpret_cast<const uint16_t*>(&m_Buffer[3])));
            m_eDeserialize = DESERIALIZE_FULL;
            break;
        }
        case DESERIALIZE_ERROR:
        case DESERIALIZE_FULL:
        default:
            assert(false);
        } // switch

        // No error
        return true;
    }

    // Members
    uint16_t m_ReferenceNbr;
    uint16_t m_ErrorCode;
    typedef enum {
        DESERIALIZE_ERROR = 0,
        DESERIALIZE_BODY  = 1,
        DESERIALIZE_FULL  = 2
    } E_DESERIALIZE;
    E_DESERIALIZE m_eDeserialize;
};

#endif // GATEWAY_CLIENT_ERROR_H