/*
   Copyright (C) 2016-2020 Laurent Montel <montel@kde.org>

   This library is free software; you can redistribute it and/or modify it
   under the terms of the GNU Library General Public License as published by
   the Free Software Foundation; either version 2 of the License, or (at your
   option) any later version.

   This library is distributed in the hope that it will be useful, but WITHOUT
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
   License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to the
   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   02110-1301, USA.
*/

#ifndef MESSAGEPARTRENDERERMANAGER_H
#define MESSAGEPARTRENDERERMANAGER_H

#include "messageviewer_export.h"

#include <grantlee/template.h>

#include <QMetaType>
#include <QObject>

#include <functional>

namespace GrantleeTheme {
class Engine;
}

namespace MessageViewer {
class GlobalContext;

typedef std::function<void (Grantlee::OutputStream *stream)> GrantleeCallback;
/**
 * @brief The MessagePartRendererManager class
 */
class MESSAGEVIEWER_EXPORT MessagePartRendererManager : public QObject
{
    Q_OBJECT
public:
    explicit MessagePartRendererManager(QObject *parent = nullptr);
    ~MessagePartRendererManager();
    static MessagePartRendererManager *self();

    Q_REQUIRED_RESULT Grantlee::Template loadByName(const QString &name);
    Q_REQUIRED_RESULT Grantlee::Context createContext();
private:
    void initializeRenderer();
    GrantleeTheme::Engine *m_engine = nullptr;
    GlobalContext *m_globalContext;
};
}

Q_DECLARE_METATYPE(MessageViewer::GrantleeCallback)

#endif // MESSAGEPARTRENDERERMANAGER_H
