/*

* Copyright (c) 2007 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:  This class is responsible for all category tables (Artist,

*                Album, Genre, Composer, AbstractAlbum).

*

*

*/

#ifndef MPXDBABSTRACTALBUM_H

#define MPXDBABSTRACTALBUM_H

// INCLUDES

#include <thumbnailmanager.h>

#include <thumbnailmanagerobserver.h>

#include "mpxdbcategory.h"

// CLASS FORWARDS

// CLASS DECLARATION

/**

* Responsible for managing all music databases

*

* @lib MPXDbPlugin.lib

*/

class CMPXDbAbstractAlbum :

    public CMPXDbCategory,

    public MThumbnailManagerObserver

    {

    public:

        /**

        * Two-phased constructor.

        * @param aDbManager database manager to use for database interactions

        * @param aCategory identifies the category

        * @return New CMPXDbCategory instance.

        */

        static CMPXDbAbstractAlbum* NewL(CMPXDbManager& aDbManager,

            TMPXGeneralCategory aCategory);

        /**

        * Two-phased constructor.

        * @param aDbManager database manager to use for database interactions

        * @param aCategory identifies the category

        * @return New CMPXDbCategory instance on the cleanup stack.

        */

        static CMPXDbAbstractAlbum* NewLC(CMPXDbManager& aDbManager,

            TMPXGeneralCategory aCategory);

        /**

        * Destructor

        */

        virtual ~CMPXDbAbstractAlbum();

        /**

        * Find the drive Id for a abstractalbum

        * @param aAbstractAlbumId identifies the abstractalbum

        * @return corresponding drive id

        */

        TInt GetDriveIdL(TUint32 aAbstractAlbumId);

        /**

        * Add a category item. If the record already exists, its counter will

        * be incremented.

        * @param aName: This is the name to be entered into the row

        * @param aDriveId: The Drive Id the name (category) belongs

        * @param aNewRecord: indicates to the caller if a new record is created.

        *        ETrue if a new row is created in the table; otherwise EFalse.

        * @param aCaseSensitive indicates whether case sensitivity should be taken

        *        into consideration when generating the unique row id

        * @return The unique id of the row added.

        */

        TUint32 AddItemL( const TDesC& aName, const TDesC& aAlbumArtist, const TDesC& aGenre, TInt aDriveId, TBool& aNewRecord,

            TBool aCaseSensitive = ETrue);

        /**

        * Decrement the number of songs for the item. If the count gets to 0, remove

        * the item.

        * @param aId: The ID of the category to delete.

        * @param aDriveId: The drive Id the name (category) belongs to. Songs on different

        *                  drives may belong to the same album or artist; consequently, one

        *                  row for each artist/album id and drive ID pair will exist in the

        *                  lookup table with a count existing for each row that tracks the

        *                  number number of songs on that drive with that album/artist.

        * @param aItemChangedMessages if valid on return contains a deleted message if the

        *                  category was deleted

        * @param aItemExist Out parameter, ETrue if the category is not deleted after the delete,

        *        EFalse otherwise

        */

        void DecrementSongsForCategoryL(TUint32 aId, TInt aDriveId,

            CMPXMessageArray* aItemChangedMessages, TBool& aItemExist, TBool aMtpInUse);

        /**

        * Remove a abstractalbum and return its URI

        * @param aAbstractAlbumId identifies the abstractalbum

        * @return HBufC containing the URI. Ownership is transferred.

        */

        HBufC* DeleteAbstractAlbumL(TUint32 aAbstractAlbumId, TInt aDriveId = 0);

        /**

        * Update a category item.

        * @param aId: The ID of the category to update

        * @param aMedia: The media data

        * @param aDriveId: The Drive Id the name (category) belongs

        * @param aItemChangedMessages: if valid on return contains a updated message if the

        *        category was updated

        */

        void UpdateItemL(TUint32 aId, const CMPXMedia& aMedia, TInt aDriveId, CMPXMessageArray* aItemChangedMessages);

    private:

        /**

        * Updates the media with information from the table

        * @param aRecord record containing the source fields

        * @param aAttrs attributes to be returned

        * @param aMedia returns the requested attributes

        */

        void UpdateMediaL(RSqlStatement& aRecord, const TArray<TMPXAttribute>& aAttrs,

            CMPXMedia& aMedia);

        /**

        * Generate searching criteria for album table from the given criteria

        * @param aMedia media data

        * @param aFields fields of Album table

        * @param aValues values of each field of Album table

        * @return a string containing the selection criteria. The ownership is passed to the caller.

        */

        void GenerateAbstractAlbumFieldsValuesL(const CMPXMedia& aMedia,

            CDesCArray& aFields, CDesCArray& aValues);

        /**

        * @see MMPXTable

        */

        virtual void CreateTableL(RSqlDatabase& aDatabase, TBool aCorruptTable);

        /**

        * @see MMPXTable

        */

        virtual TBool CheckTableL(RSqlDatabase& aDatabase);

        /**

        * C++ constructor.

        * @param aDbManager database manager to use for database interactions

        * @param aCategory identifies the category

        */

        CMPXDbAbstractAlbum(CMPXDbManager& aDbManager, TMPXGeneralCategory aCategory);

        /**

        * Second phase constructor.

        */

        void ConstructL();

        /**

        * MThumbnailManagerObserver

        */

        void ThumbnailPreviewReady(

            MThumbnailData& aThumbnail, TThumbnailRequestId aId );

        /**

        * MThumbnailManagerObserver

        */

        void ThumbnailReady(

            TInt aError, 

            MThumbnailData& aThumbnail, TThumbnailRequestId aId );

    public:

        /**

        * Column indexes in the category tables

        */

        enum TAbstractAlbumColumns

            {

            EAbstractAlbumUniqueId = KMPXTableDefaultIndex,

            EAbstractAlbumName,

            EAbstractAlbumArtist,

            EAbstractAlbumGenre,

            EAbstractAlbumSongCount,

            EAbstractAlbumVolumeId,

            EAbstractAlbumFieldCount

            };

    private:    // Data

        CThumbnailManager*        iTNManager;

    };

#endif // MPXDBAbstractAlbum_H

// End of File