/*

* Copyright (c) 2010 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: Utility class for fetching email.

*

*/

#ifndef _QEMAILFETCHER_H

#define _QEMAILFETCHER_H

#ifdef BUILD_DLL

#define DLL_EXPORT Q_DECL_EXPORT

#else

#define DLL_EXPORT Q_DECL_IMPORT

#endif

//TODO: Uncomment when available.

#include <nmapiemailservice.h>

#include <nmapieventnotifier.h>

#include <nmapimailboxlisting.h>

#include <nmapienvelopelisting.h>

#include <nmapimessageenvelope.h>

#include <nmapifolderlisting.h>

#include <QObject>

#include "memailitemobserver.h"

using namespace EmailClientApi;

//How this works:

//1. List all mail boxes.

//2. In each mail box, list the folders

//3. In each folder, list the mails

//4. Process each email

//

//We voluntarily relinquish the processor (we sleep) each time we have completed 

//processing a given folder. This is to avoid 'hogging' the processor.

class DLL_EXPORT QEmailFetcher: public QObject

    {

    Q_OBJECT

public:

    static QEmailFetcher* newInstance(MEmailItemObserver& aObserver);

    ~QEmailFetcher();

    void StartHarvesting();

private:

    QEmailFetcher(MEmailItemObserver& aObserver );

    static void initialize(QEmailFetcher* aThis); //helper (2nd phase constructor).

    void emailServiceIntialized( bool );

    void handleMailboxesListed( int );

    void processMessages( int );

    //Connect to messageEvent signal

    void handleMessageEvent( MessageEvent aEvent, quint64 mailboxId, quint64 folderId, QList<quint64> messageList );

private:

    MEmailItemObserver& iEmailObserver;     //The parent/creator. Not owned.

    NmEventNotifier* iEmailEventNotifier;   //owned; triggers handleMessageEvent.

    NmEmailService* iEmailService;          //owned. 

    NmMailboxListing* iMailBoxListings;     //owned.

    NmFolderListing* iMailFolderList;       //owned.

    NmEnvelopeListing* iEnvelopeListing;    //owned.

    NmMessageEnvelope* iMessageListing;     //owned.

    };

#endif //_QEMAILFETCHER_H