AvatarLoader.h

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#ifndef AVATARLOADER_H
#define AVATARLOADER_H
 
#include <QIcon>
#include <QObject>
#include <deque>
#include <set>
#include <string>
 
class MainWindow;
class WebContext;
 
struct AvatarLoaderItem {
    std::string email;
    QImage image;
};
Q_DECLARE_METATYPE(AvatarLoaderItem)
 
class AvatarLoader : public QObject {
    Q_OBJECT
public:
private:
    enum State {
        Idle,
        Busy,
        Done,
        Fail,
    };
    struct RequestItem {
        State state = Idle;
        QString email;
        QImage image;
    };
    struct Private;
    Private *m;
 
    bool isInterruptionRequested() const;
protected:
    void run();
public:
    AvatarLoader(QObject *parent = nullptr);
    ~AvatarLoader() override;
    void requestInterruption();
    QImage fetch(const QString &email, bool request) const;
    void stop();
    void start(MainWindow *mainwindow);
    template <typename Func2> void connectAvatarReady(const typename QtPrivate::FunctionPointer<Func2>::Object *receiver, Func2 slot)
    {
        connect(this, &AvatarLoader::ready, receiver, slot);
    }
    template <typename Func2> void disconnectAvatarReady(const typename QtPrivate::FunctionPointer<Func2>::Object *receiver, Func2 slot)
    {
        disconnect(this, &AvatarLoader::ready, receiver, slot);
    }
signals:
    void ready();
};
 
#endif // AVATARLOADER_H