ExpanderPinAdapter.h

#ifndef INPUT_EVENTS_EXPANDER_PIN_ADAPTER_H
#define INPUT_EVENTS_EXPANDER_PIN_ADAPTER_H
 
#include "Arduino.h"
#include "PinAdapter.h"
#include "GpioExpanderAdapter/GpioExpanderAdapter.h"
 
class ExpanderPinAdapter : public PinAdapter {
    public:
 
    ExpanderPinAdapter(byte pin, GpioExpanderAdapter& expander, int mode = INPUT_PULLUP)
        : pin(pin),
          mode(mode),
          expanderAdapter(&expander)
        {}
 
    void begin() override {
        if ( !expanderAdapter ) return;
        expanderAdapter->attachPin(pin, mode);
    }
 
    bool read() override { 
        if ( !expanderAdapter ) return (mode == INPUT_PULLUP); //For safety, this should return the 'OFF' state based on pinMode
        return expanderAdapter->read(pin); 
    }
 
    private:
    byte pin;
    int mode;
    GpioExpanderAdapter* expanderAdapter;
};
 
#endif