/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
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** included in the packaging of this file. Please review the following
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****************************************************************************/

#ifndef QDBUSPENDINGCALL_H
#define QDBUSPENDINGCALL_H

#include <QtDBus/qtdbusglobal.h>
#include <QtDBus/qdbusmessage.h>
#include <QtCore/qobject.h>
#include <QtCore/qshareddata.h>

#ifndef QT_NO_DBUS

QT_BEGIN_NAMESPACE


class QDBusConnection;
class QDBusError;
class QDBusPendingCallWatcher;

class QDBusPendingCallPrivate;
class Q_DBUS_EXPORT QDBusPendingCall
{
public:
    QDBusPendingCall(const QDBusPendingCall &other);
    ~QDBusPendingCall();
    QDBusPendingCall &operator=(QDBusPendingCall &&other) noexcept { swap(other); return *this; }
    QDBusPendingCall &operator=(const QDBusPendingCall &other);

    void swap(QDBusPendingCall &other) noexcept { qSwap(d, other.d); }

#ifndef Q_CLANG_QDOC
    // pretend that they aren't here
    bool isFinished() const;
    void waitForFinished();

    bool isError() const;
    bool isValid() const;
    QDBusError error() const;
    QDBusMessage reply() const;
#endif

    static QDBusPendingCall fromError(const QDBusError &error);
    static QDBusPendingCall fromCompletedCall(const QDBusMessage &message);

protected:
    QExplicitlySharedDataPointer<QDBusPendingCallPrivate> d;
    friend class QDBusPendingCallPrivate;
    friend class QDBusPendingCallWatcher;
    friend class QDBusConnection;

    QDBusPendingCall(QDBusPendingCallPrivate *dd);

private:
    QDBusPendingCall();         // not defined
};

Q_DECLARE_SHARED(QDBusPendingCall)

class QDBusPendingCallWatcherPrivate;
class Q_DBUS_EXPORT QDBusPendingCallWatcher: public QObject, public QDBusPendingCall
{
    Q_OBJECT
public:
    explicit QDBusPendingCallWatcher(const QDBusPendingCall &call, QObject *parent = nullptr);
    ~QDBusPendingCallWatcher();

#ifdef Q_QDOC
    // trick qdoc into thinking this method is here
    bool isFinished() const;
#endif
    void waitForFinished();     // non-virtual override

Q_SIGNALS:
    void finished(QDBusPendingCallWatcher *self = nullptr);

private:
    Q_DECLARE_PRIVATE(QDBusPendingCallWatcher)
    Q_PRIVATE_SLOT(d_func(), void _q_finished())
};

QT_END_NAMESPACE

#endif // QT_NO_DBUS
#endif