userdatabase.hh

#ifndef USERDATABASE_HH
#define USERDATABASE_HH
 
#include <QObject>
#include <QVector>
#include <QHash>
#include <QJsonObject>
#include <QNetworkAccessManager>
#include <QAbstractTableModel>
#include <QSortFilterProxyModel>
#include <QGeoPositionInfoSource>
#include <QFuture>

class UserDatabase : public QAbstractTableModel
{
  Q_OBJECT

  Q_PROPERTY(bool ready READ ready NOTIFY readyChanged FINAL)
 
public:
  class User {
  public:
    User();
    User(const QJsonObject &obj);

    inline bool isValid() const { return 0 != id; }

    unsigned distance(unsigned id) const;

    unsigned id;
    QString call;
    QString name;
    QString surname;
    QString city;
    QString state;
    QString country;
    QString comment;
  };
 
public:
  explicit UserDatabase(bool parallel, unsigned updatePeriodDays=30, QObject *parent=nullptr);

  qint64 count() const;

  bool exists() const;

  bool load();
  bool load(const QString &filename);
  bool ready() const;

  void sortUsers(unsigned id);
  void sortUsers(const QSet<unsigned> &ids);

  const User &user(int idx) const;

  unsigned dbAge() const;

  int rowCount(const QModelIndex &parent=QModelIndex()) const;
  int columnCount(const QModelIndex &parent=QModelIndex()) const;
  QVariant data(const QModelIndex &index, int role=Qt::DisplayRole) const;
 
signals:
  void loaded();
  void error(const QString &msg);
  void readyChanged(bool ready);
 
public slots:
  void download();
 
private slots:
  void downloadFinished(QNetworkReply *reply);
  bool parse(QList<User> &users);
  bool parse(const QString &filename, QList<User> &users);
  bool load(const QList<User> &users);
 
private:
  QVector<User>         _user;
  QNetworkAccessManager _network;
  QFuture<bool> _parsing;
};
 
 
#endif // USERDATABASE_HH