wcs.hpp

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#ifndef NGC_GATEWAY_WCS_H_
#define NGC_GATEWAY_WCS_H_
 
#include <string>
#include <mutex>
 
namespace ngc::gateway::base {

  struct WcsInformation {
    float reference_point_x;
    float reference_point_y;
    float ra_reference_point;
    float dec_reference_point;
    float arcsec_pixel_x;
    float arcsec_pixel_y;
    float rotation_x_axis;
    float cd1_1;
    float cd1_2;
    float cd2_1;
    float cd2_2;
    float epoch_equinox;
    std::string type_1;
    std::string type_2;
  };
  
  class Wcs {
  public:
    Wcs(const Wcs&) = delete;
    Wcs& operator = (const Wcs&) = delete;
    
    static Wcs& Instance() {
      static Wcs wcs_instance;
      return (wcs_instance);
    }

    void SetInfo(const WcsInformation& info) {
      std::lock_guard<std::mutex> guard(m_mutex);
      m_wcs_info = info;
    }

    WcsInformation GetInfo() {
      std::lock_guard<std::mutex> guard(m_mutex);
      WcsInformation info = m_wcs_info;
      return info;
    }

    static void Set(const WcsInformation& info) {
      Instance().SetInfo(info);
    }

    static WcsInformation Get() {
      return Instance().GetInfo();
    }
    
  protected:
  private:
    std::mutex m_mutex;

    WcsInformation m_wcs_info;

    Wcs() {
      m_wcs_info.reference_point_x = 0.5;
      m_wcs_info.reference_point_y = 0.5;
      m_wcs_info.ra_reference_point = 1.0;
      m_wcs_info.dec_reference_point = 1.0;
      m_wcs_info.arcsec_pixel_x = 0.0;
      m_wcs_info.arcsec_pixel_y = 0.0;
      m_wcs_info.rotation_x_axis = 0.0;
      m_wcs_info.cd1_1 = 1.0;
      m_wcs_info.cd1_2 = 0.0;
      m_wcs_info.cd2_1 = 0.0;
      m_wcs_info.cd2_2 = 1.0;
      m_wcs_info.epoch_equinox = 2000.0;
      m_wcs_info.type_1 = "PIXEL";
      m_wcs_info.type_2 = "PIXEL";
    }
    
    ~Wcs() {}
  }; 
 
}
 
#endif /* NGC_GATEWAY_WCS_H_ */