/*

* 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 Artist table.

*

*

*/

#ifndef MPXDBARTIST_H

#define MPXDBARTIST_H

// INCLUDES

#include "mpxdbcategory.h"

// CLASS DECLARATION

class MMPXDbArtistObserver

    {

    public:

		virtual TInt HandleGetAlbumsCountForArtistL(TUint32 aId) = 0;

	};

/**

* Responsible for managing all music databases

*

* @lib MPXDbPlugin.lib

*/

class CMPXDbArtist :

    public CMPXDbCategory

    {

    public:

        /**

        * Two-phased constructor.

        * @param aDbManager database manager to use for database interactions

        * @param aCategory identifies the category

        * @return New CMPXDbArtist instance.

        */

        static CMPXDbArtist* NewL(CMPXDbManager& aDbManager,

            TMPXGeneralCategory aCategory, MMPXDbArtistObserver& aObserver);

        /**

        * Two-phased constructor.

        * @param aDbManager database manager to use for database interactions

        * @param aCategory identifies the category

        * @return New CMPXDbArtist instance on the cleanup stack.

        */

        static CMPXDbArtist* NewLC(CMPXDbManager& aDbManager,

            TMPXGeneralCategory aCategory, MMPXDbArtistObserver& aObserver);

        /**

        * Destructor

        */

        virtual ~CMPXDbArtist();

    public:

        /**

        * 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& aArt, TInt aDriveId, TBool& aNewRecord,

            TBool aCaseSensitive = ETrue);

        /**

        * Gets the details for all category items.

        * @param aAttrs attributes to be returned

        * @param aMediaArray returns the requested attributes for all items

        */

        void GetAllCategoryItemsL(const TArray<TMPXAttribute>& aAttrs,

            CMPXMediaArray& aMediaArray);

        /**

        * 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);

        /*

        * Checks if the specified artist item is unknown

        * @param aId identifies the artist item

        * @return ETrue if it is unknown, EFalse otherwise

        */

        TBool IsUnknownArtistL(TUint32 aId);

    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 artist table from the given criteria

        * @param aMedia media data

        * @param aFields fields of Artist table

        * @param aValues values of each field of Artist table

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

        */

        void GenerateArtistFieldsValuesL(const CMPXMedia& aMedia,

            CDesCArray& aFields, CDesCArray& aValues);

        /**

        * Gets the Album counts for a Artist item

        * @param aId identifies the Artist item

        * @return value of the Album counts

        */

        TInt GetAlbumsCountL(TUint32 aId);

    private:    // from MMPXTable

        /**

        * @see MMPXTable

        */

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

        /**

        * @see MMPXTable

        */

        virtual TBool CheckTableL(RSqlDatabase& aDatabase);

    private:

        /**

        * C++ constructor.

        * @param aDbManager database manager to use for database interactions

        * @param aCategory identifies the category

        */

        CMPXDbArtist(CMPXDbManager& aDbManager, TMPXGeneralCategory aCategory, MMPXDbArtistObserver& aObserver);

        /**

        * Second phase constructor.

        */

        void ConstructL();

    private:

        /**

        * Column indexes in the category tables

        */

        enum TArtistColumns

            {

            EArtistUniqueId = KMPXTableDefaultIndex,

            EArtistName,

            EArtistSongCount,

            EArtistArt,

            EArtistFieldCount

            };

    private:    // Data

        MMPXDbArtistObserver& iObserver;

    };

#endif // MPXDBARTIST_H

// End of File