/*

* 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:  Harvester message plugin

*

*/

#ifndef CMESSAGEHARVESTER_H

#define CMESSAGEHARVESTER_H

//  INCLUDES 

#include <e32base.h>

#include <msvapi.h>

//#include <mdeitem.h>

#include "cmessageplugin.h"

class CMessageHarvester : public CActive

    {

    public:

        /**

        * Construction

        * @return Harvester image plugin

        */

        static CMessageHarvester* NewL( CMessagePlugin& aMessagePlugin, CMsvSession& aSession );

        /**

        * Destruction

        */

        virtual ~CMessageHarvester();

        /**

        * Start harvesting message items

        */

        void StartHarvestingL();

    private:  //From CActive

	    /**

	     * From CACtive.

	     */

        void DoCancel();

        /**

	     * From CACtive.

         */

        void RunL();

        /**

	     * From CACtive.

	     * @param aError Leave code from RunL()

	     * @return Error code, KErrNone if error was handled successfully.

         */

        TInt RunError( TInt aError );

    private:

        /**

        * Private constructor

        */    

        CMessageHarvester( CMessagePlugin& aMessagePlugin, CMsvSession& aSession );

        /**

        * Get next messaging folder 

        */

        void GetNextFolderL();

        /**

        * List subfolder from current folder

        * @param aFolderEntry Folder entry

        */        

        void ListSubFoldersL(  const CMsvEntry& aFolderEntry );

        /**

        * List subfolder from current folder

        * @param aFolderId a folder identifier

        */ 

        void AddFolderWithSubFoldersL( const TMsvId& aFolderId );

        /**

        * Get message folders under the messaging   

        */ 

        void GetMessageFoldersL();

        /**

        * Get message identifier

        */ 

        void GetMessageIdL();

        /**

        * Handles next request

        */

        void HandleNextRequest();      

    private:

    	enum TState

    		{

    		EStateIdle, // Stopped

    		EStateNextFolder, // Getting the next folder 

    		EStateNextMessage, // Getting the next message

    		};

    private:

        // Whether Harvesting is ready   

        TBool iHarvestCompleted;

        // Message plugin for observing

        CMessagePlugin& iMessagePlugin; 

        // Session Message server session, own

        CMsvSession& iMsvSession;

        // Internal state machine state

        TState iState;

        // Array of folders to be searched  

        RArray<TMsvId> iToBeSearchedFolders;

        // UID of current folder searched

        TMsvId iCurrentFolder;

        // Current folder message items 

        CMsvEntrySelection* iChildren;         

    };

#endif // CMESSAGEHARVESTER_H

// End of File