/*

 * 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 "nmenginedef.h"

#include "nmcommon.h"

#include "nmapimailbox.h"

#include "nmapifolder.h"

#include "nmprivateclasses.h"

#include "nmapimessageenvelope.h"

class NmDataPluginFactory;

class NmEngine : public QObject

{

    Q_OBJECT

public:

    static NmEngine* instance();

    static void releaseInstance(NmEngine *&engine);

    void listMailboxes(QList<EmailClientApi::NmMailbox> &mailboxList);

    void listFolders(const quint64 mailboxId, QList<EmailClientApi::NmFolder> &folderList);

    void listEnvelopes(const quint64 mailboxId, const quint64 folderId, QList<

        EmailClientApi::NmMessageEnvelope> &messageEnvelopeList);

    bool envelopeById(

        const quint64 mailboxId,

        const quint64 folderId,

        const quint64 envelopeId,

        EmailClientApi::NmMessageEnvelope &envelope);

    bool mailboxById(const quint64 mailboxId, EmailClientApi::NmMailbox &mailbox);

    void startCollectingEvents();

    signals:

    /*!

     * It contains info about event in emailstore.

     * 

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

     */

    void emailStoreEvent(NmApiMessage message);

public slots:

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

    void messageChangedArrived(

        NmMessageEvent messageEvent,

        const NmId &folderId,

        const QList<NmId> &messageIds,

        const NmId &mailboxId);

private:

    NmEngine();

    virtual ~NmEngine();

private:

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

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

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

};

#endif /* NMENGINE_H_ */