/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:    Contains cached MDS media items which are being downloaded.*

*/

#ifndef VCXMYVIDEOSDOWNLOADCACHE_H

#define VCXMYVIDEOSDOWNLOADCACHE_H

// INCLUDES

// FORWARD DECLARATIONS

class CMPXMedia;

// CONSTANTS

// CLASS DECLARATION

/**

* Used for storing download ids and media object pointers to circular buffers for fast access.

*

* @lib mpxmyvideoscollectionplugin.lib

*/

NONSHARABLE_CLASS(CVcxMyVideosDownloadCache) : public CBase

    {    

    public: // Constructors and destructor

        /**

        * Two-phased constructor

        * @return   Object constructed

        */

        static CVcxMyVideosDownloadCache* NewL();

        /**

        * Destructor

        */

        virtual ~CVcxMyVideosDownloadCache();

    private:

        /**

        * Constructor

        */

        CVcxMyVideosDownloadCache();

        /**

        * Symbian 2nd phase constructor.

        */

        void ConstructL ();

    public:                        

        /**

        * Tries to find item with aDownloadId from Download Cache.

        *

        * @param aDownloadId   Download ID in Download Manager.

        * @return              Returns pointer to media object, NULL if not found.

        *                      Ownership does not move.

        */

        CMPXMedia* Get( TUint32 aDownloadId );

        /**

        * Adds download ID and index pair to Download Cache.

        *

        * @param aDownloadId  Download ID in Download Manager

        * @param aVideo       Pointer to video, ownership does not move.

        */

        void Add( TUint32 aDownloadId, CMPXMedia* aVideo );

        /**

        * Deletes item from Download Cache

        *

        * @param aVideo  Video to remove.

        */

        void Delete( CMPXMedia* aVideo );

    private:

        /**

        * Array used as circular buffer, contains download ids.

        */

        RArray<TUint32> iDownloadId;

        /**

        * Array used as circular buffer, contains pointers to medias.

        */

        RPointerArray<CMPXMedia> iMedia;

        /**

        * Current position of the circular buffers (iDownloadId and iMedia).

        * Next item added is written to this position.

        */

        TInt iPos;

    };

#endif   // VCXMYVIDEOSVIDEOCACHE_H