/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#ifndef NMAPIENGINE_H

#define NMAPIENGINE_H

#include <CFSMailPlugin.h>

#include <CFSMailFolder.h>

#include "nmcommon.h"

#include "nmapiprivateclasses.h"

namespace EmailClientApi

{

class NmApiFolder;

class NmApiMailbox;

class NmApiMessageEnvelope;

class NmApiMessage;

class NmApiEngine : public QObject

{

    Q_OBJECT

public:

    static NmApiEngine* instance();

    static void releaseInstance(NmApiEngine *&engine);

    void listEnvelopes(const quint64 mailboxId, const quint64 folderId, 

    bool getEnvelopeById(

        const quint64 mailboxId,

        const quint64 folderId,

        const quint64 envelopeId,

    bool getFolderById(

        const quint64 mailboxId,

        const quint64 folderId,

    bool getMessageById(

        const quint64 mailboxId,

        const quint64 folderId,

        const quint64 messageId,

    void startCollectingEvents();

    bool listMailPlugins(RPointerArray<CFSMailPlugin> &mailPlugins);

    signals:

    /*!

       It contains info about event in emailstore.

       \arg Contains info about event and related object (message or mailbox list)

     */

private slots:

    void mailboxChangedArrived(NmMailboxEvent, const QList<NmId> &mailboxIds);

    void messageChangedArrived(

        NmMessageEvent messageEvent,

        const NmId &folderId,

        const QList<NmId> &messageIds,

        const NmId &mailboxId);

private:

    NmApiEngine();

    virtual ~NmApiEngine();

    void listMailPlugins();

    void listMailPluginsL();

private:

    static NmApiEngine *mInstance;//!<Static instance of NmApiEngine. There can be only one instance of engine

    static quint32 mReferenceCount;//!<Count of refences to engine instance

    NmApiDataPluginFactory *mFactory;//!<Plugin factory. Is needed to get plugins for emails

    RPointerArray<CFSMailPlugin> mMailPlugins;

};

#endif /* NMAPIENGINE_H */