Promise.hpp

#ifndef PROMISE_HPP
#define PROMISE_HPP

#include <QObject>
#include <QJSValue>
#include <QVariant>

class QmlPromise : public QObject
{
    Q_OBJECT
    Q_PROPERTY(bool isFulfilled READ isFulfilled NOTIFY settled)
    Q_PROPERTY(bool isRejected READ isRejected NOTIFY settled)
    Q_PROPERTY(bool isSettled READ isSettled NOTIFY settled)
    QObject* internalPromise;
    bool wasFulfilled = false;
    bool wasRejected = false;

public:
    QmlPromise(QObject* parent);
    virtual ~QmlPromise();

    bool isFulfilled();
    bool isRejected();
    bool isSettled();
    /// Returns true if the javascript promise was already destroyed; false otherwise
    bool wasForgotten() { return internalPromise; }

    operator QJSValue();

public slots:
    void resolve(QVariant args = QVariant());
    void reject(QVariant reason = QVariant());

signals:
    void fulfilled(QVariant);
    void rejected(QVariant);
    void settled();
};

#endif // PROMISE_HPP