/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtContacts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** accordance with the commercial license agreement provided with the
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** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** 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
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** 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
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
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** $QT_END_LICENSE$
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****************************************************************************/

#ifndef QCONTACTABSTRACTREQUEST_H
#define QCONTACTABSTRACTREQUEST_H

#include <QtCore/qobject.h>

#include <QtContacts/qcontactmanager.h>

QT_BEGIN_NAMESPACE_CONTACTS

class QContactManagerEngine;

class QContactAbstractRequestPrivate;
class Q_CONTACTS_EXPORT QContactAbstractRequest : public QObject
{
    Q_OBJECT

public:
    ~QContactAbstractRequest();

    Q_ENUMS(State)
    enum State {
        InactiveState = 0,   // operation not yet started
        ActiveState,         // operation started, not yet finished
        CanceledState,       // operation is finished due to cancellation
        FinishedState        // operation either completed successfully or failed.  No further results will become available.
    };

    State state() const; // replaces status()
    inline bool isInactive() const { return state() == QContactAbstractRequest::InactiveState; }
    inline bool isActive() const { return state() == QContactAbstractRequest::ActiveState; }
    inline bool isFinished() const { return state() == QContactAbstractRequest::FinishedState; }
    inline bool isCanceled() const { return state() == QContactAbstractRequest::CanceledState; }

    QContactManager::Error error() const;

    Q_ENUMS(RequestType)
    enum RequestType {
        InvalidRequest = 0,
        ContactFetchRequest,
        ContactIdFetchRequest,
        ContactRemoveRequest,
        ContactSaveRequest,
        RelationshipFetchRequest,
        RelationshipRemoveRequest,
        RelationshipSaveRequest,
        ContactFetchByIdRequest,
        CollectionFetchRequest,
        CollectionRemoveRequest,
        CollectionSaveRequest
    };

    RequestType type() const;

    /* Which manager we want to perform the asynchronous request */
    QContactManager* manager() const;
    void setManager(QContactManager* manager);

public Q_SLOTS:
    /* Verbs */
    bool start();
    bool cancel();

    /* waiting for stuff */
    bool waitForFinished(int msecs = 0);

Q_SIGNALS:
    void stateChanged(QContactAbstractRequest::State newState);
    void resultsAvailable();

protected:
    QContactAbstractRequest(QContactAbstractRequestPrivate* otherd, QObject* parent = nullptr);
    QContactAbstractRequestPrivate* d_ptr;

private:
    QContactAbstractRequest(QObject* parent_ = nullptr) : QObject(parent_), d_ptr(nullptr) {}
    Q_DISABLE_COPY(QContactAbstractRequest)
    friend class QContactManagerEngine;
    friend class QContactAbstractRequestPrivate;

#ifndef QT_NO_DEBUG_STREAM
    Q_CONTACTS_EXPORT friend QDebug operator<<(QDebug dbg, const QContactAbstractRequest& request);
#endif

};

#ifndef QT_NO_DEBUG_STREAM
Q_CONTACTS_EXPORT QDebug operator<<(QDebug dbg, const QContactAbstractRequest& request);
#endif

QT_END_NAMESPACE_CONTACTS

#endif // QCONTACTABSTRACTREQUEST_H