orbitalelementsdatabase.hh

 
#ifndef ORBITALELEMENTSDATABASE_HH
#define ORBITALELEMENTSDATABASE_HH
 
#include <QAbstractTableModel>
#include <QNetworkAccessManager>
 

class OrbitalElement
{
public:
  struct Epoch {
    unsigned int year;
    unsigned int month;
    unsigned int day;
    unsigned int hour;
    unsigned int minute;
    unsigned int second;
    unsigned int microsecond;

    Epoch();
    Epoch(unsigned int year, unsigned int month, unsigned int day,
          unsigned int hour, unsigned int minute, unsigned int second, unsigned int microsecond);
    Epoch(const Epoch &other) = default;
    Epoch &operator =(const Epoch &other) = default;

    static Epoch parse(const QString &datetime);
    double toEpoch() const;
    QString toString() const;
  };
 
public:
  OrbitalElement();
  OrbitalElement(unsigned int id);
  OrbitalElement(const OrbitalElement &other) = default;
  OrbitalElement &operator=(const OrbitalElement &other) = default;

  bool isValid() const;
  unsigned int id() const;
  const QString &name() const;

  const Epoch &epoch() const;
  double meanMotion() const;
  double meanMotionDerivative() const;
  double inclination() const;
  double ascension() const;
  double eccentricity() const;
  double perigee() const;
  double meanAnomaly() const;
  unsigned int revolutionNumber() const;
 
public:
  static OrbitalElement fromCelesTrak(const QJsonObject &obj);
 
protected:
  unsigned int _id;
  QString _name;
  Epoch _epoch;
  double _meanMotion;
  double _meanMotionDerivative;
  double _inclination;
  double _ascension;
  double _eccentricity;
  double _perigee;
  double _meanAnomaly;
  unsigned int _revolutionNumber;
};
 
 

class OrbitalElementsDatabase: public QAbstractTableModel
{
  Q_OBJECT
 
public:
  explicit OrbitalElementsDatabase(bool autoLoad, unsigned int updatePeriodDays=7, QObject *parent=nullptr);

  bool contains(unsigned int id) const;
  OrbitalElement getById(unsigned int id) const;
  const OrbitalElement &getAt(unsigned int idx) const;
  OrbitalElement &getAt(unsigned int idx);

  unsigned int dbAge() const;
  void load();

  int rowCount(const QModelIndex &parent = QModelIndex()) const;
  int columnCount(const QModelIndex &parent = QModelIndex()) const;
  QVariant data(const QModelIndex &index, int role) const;
  QVariant headerData(int section, Qt::Orientation orientation, int role) const;
 
signals:
  void loaded();
  void error(const QString &msg);
 
public slots:
  void download();
 
private slots:
  void downloadFinished(QNetworkReply *reply);
 
protected:
  bool load(const QString &filename);
 
private:
  unsigned int _updatePeriod;
  QVector<OrbitalElement>  _elements;
  QHash<unsigned int, unsigned int> _idIndexMap;
  QNetworkAccessManager _network;
};
 
#endif // ORBITALELEMENTSDATABASE_HH