DefaultLibrary.hpp

#pragma once
#include <QObject>
#include <QString>
#include <QUuid>
 
#include <score_lib_base_export.h>
 
#include <functional>
#include <verdigris>
 
namespace score
{
class SCORE_LIB_BASE_EXPORT DefaultLibrary final : public QObject
{
  W_OBJECT(DefaultLibrary)
 
public:
  enum class State
  {
    Current,         
    Missing,         
    UpdateAvailable, 
    Installing,      
    Failed           
  };
 
  static DefaultLibrary& instance();
 
  static QUuid key();
  static QString folder();
  static int installedVersion();
 
  State state() const;
  int availableVersion() const noexcept { return m_available; }
  qint64 downloadSize() const noexcept { return m_size; }
  double progress() const noexcept { return m_progress; }
  const QString& error() const noexcept { return m_error; }
 
  void setAvailable(int version, qint64 bytes);
  void setInstaller(std::function<void()> installer);
 
  bool canInstall() const noexcept { return bool(m_installer); }
  void install();
 
  void setProgress(qint64 received, qint64 total);
  void setFinished(bool ok, const QString& error = {});
 
  bool offeredInView() const noexcept { return m_views > 0; }
  void addView() noexcept { m_views++; }
  void removeView() noexcept { m_views--; }
 
  bool reportedInView() const noexcept { return m_installing && m_fromView && m_views > 0; }
 
  void changed() E_SIGNAL(SCORE_LIB_BASE_EXPORT, changed)
 
private:
  DefaultLibrary();
 
  std::function<void()> m_installer;
  QString m_error;
  qint64 m_size{};
  double m_progress{-1.};
  int m_available{-1};
  int m_views{};
  bool m_installing{};
  bool m_fromView{};
  bool m_failed{};
};
}