moonPhase.h

/*
  MoonPhase.h - Library to get moon phase angle
  and percentage illuminated. (as seen from Earth)
  Created by Marcel Timmer, April 28, 2018.
  Code adapted from http://www.voidware.com/phase.c
  A big thanks to Hugh at voidware for granting permission.
  Released under MIT license.
*/
#ifndef MoonPhase_h
#define MoonPhase_h

#include <Arduino.h>

struct moonData_t
{
  int32_t angle;
  double  percentLit;
};

class moonPhase
{
public:
  moonData_t getPhase(const time_t t)
  {
    struct tm timeinfo;
    gmtime_r(&t, &timeinfo);
    return _getPhase(1900 + timeinfo.tm_year, 1 + timeinfo.tm_mon, timeinfo.tm_mday, _fhour(timeinfo));
  }

  moonData_t getPhase()
  {
    return getPhase(time(NULL));
  }
private:
  double     _fhour(const struct tm &timeinfo);
  moonData_t _getPhase(const int32_t year, const int32_t month, const int32_t day, const double &hour);
};
#endif