function_property.h

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#pragma once
 
#include "property.h"
 
class InterfaceObject;
 
template <class T> class FunctionProperty : public Property
{
    public:
        FunctionProperty(T* io, PropertyID id,
                         void (*commandCallback)(T*, uint8_t*, uint8_t, uint8_t*, uint8_t&),
                         void (*stateCallback)(T*, uint8_t*, uint8_t, uint8_t*, uint8_t&))
            : Property(id, false, PDT_FUNCTION, 1, ReadLv0 | WriteLv0), _interfaceObject(io), _commandCallback(commandCallback), _stateCallback(stateCallback)
              /* max_elements is set to 1, read and write level any value so we use Lv0, see 3.3.7 Application Layer p.68 */
        {}
 
        uint8_t read(uint16_t start, uint8_t count, uint8_t* data) const override
        {
            return 0;
        }
 
        uint8_t write(uint16_t start, uint8_t count, const uint8_t* data) override
        {
            return 0;
        }
 
        void command(uint8_t* data, uint8_t length, uint8_t* resultData, uint8_t& resultLength) override
        {
            if (length == 0 || _commandCallback == nullptr )
            {
                resultLength = 0;
                return;
            }
 
            _commandCallback(_interfaceObject, data, length, resultData, resultLength);
        }
 
        void state(uint8_t* data, uint8_t length, uint8_t* resultData, uint8_t& resultLength) override
        {
            if (length == 0 || _stateCallback == nullptr )
            {
                resultLength = 0;
                return;
            }
 
            _stateCallback(_interfaceObject, data, length, resultData, resultLength);
        }
 
    private:
        T* _interfaceObject = nullptr;
        void (*_commandCallback)(T*, uint8_t*, uint8_t, uint8_t*, uint8_t&) = nullptr;
        void (*_stateCallback)(T*, uint8_t*, uint8_t, uint8_t*, uint8_t&) = nullptr;
};