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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/

#pragma once

#include "qmldebugclient.h"

namespace QmlDebug {

class QMLDEBUG_EXPORT QmlEngineControlClient : public QmlDebugClient
{
    Q_OBJECT
public:
    explicit QmlEngineControlClient(QmlDebugConnection *client);

    enum MessageType {
        EngineAboutToBeAdded,
        EngineAdded,
        EngineAboutToBeRemoved,
        EngineRemoved
    };

    enum CommandType {
        StartWaitingEngine,
        StopWaitingEngine,
        InvalidCommand
    };


    void blockEngine(int engineId);
    void releaseEngine(int engineId);

    QList<int> blockedEngines() const;

    void messageReceived(const QByteArray &) override;

signals:
    void engineAboutToBeAdded(int engineId, const QString &name);
    void engineAdded(int engineId, const QString &name);
    void engineAboutToBeRemoved(int engineId, const QString &name);
    void engineRemoved(int engineId, const QString &name);

protected:
    void sendCommand(CommandType command, int engineId);

    struct EngineState {
        EngineState(CommandType command = InvalidCommand) : releaseCommand(command), blockers(0) {}
        CommandType releaseCommand;
        int blockers;
    };

    QMap<int, EngineState> m_blockedEngines;
};

}