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/*
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* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description: This class is responsible for all category tables (Artist,
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* Album, Genre, Composer).
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*
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*
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*/
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#ifndef MPXDBALBUM_H
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#define MPXDBALBUM_H
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// INCLUDES
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#include "mpxdbcategory.h"
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// CLASS DECLARATION
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class MMPXDbAlbumObserver
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{
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public:
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virtual TInt HandleIsUnknownArtistL(TUint32 aId) = 0;
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virtual HBufC* HandleArtistForAlbumL( const TUint32 aId ) = 0;
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/**
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* HandleAlbumartForAlbumL.
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* @param aId, The album ID.
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* @param aArt, The albumart uri.
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* @returns alternative albumart retrieved in the specified Album.
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*/
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virtual HBufC* HandleAlbumartForAlbumL( const TUint32 aId, TPtrC aArt ) = 0;
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};
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/**
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* Responsible for managing all music databases
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*
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* @lib MPXDbPlugin.lib
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*/
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class CMPXDbAlbum :
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public CMPXDbCategory
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{
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public:
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/**
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* Two-phased constructor.
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* @param aDbManager database manager to use for database interactions
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* @param aCategory identifies the category
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* @return New CMPXDbCategory instance.
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*/
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static CMPXDbAlbum* NewL(CMPXDbManager& aDbManager,
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TMPXGeneralCategory aCategory, MMPXDbAlbumObserver& aObserver);
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/**
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* Two-phased constructor.
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* @param aDbManager database manager to use for database interactions
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* @param aCategory identifies the category
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* @return New CMPXDbCategory instance on the cleanup stack.
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*/
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static CMPXDbAlbum* NewLC(CMPXDbManager& aDbManager,
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TMPXGeneralCategory aCategory, MMPXDbAlbumObserver& aObserver);
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/**
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* Destructor
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*/
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virtual ~CMPXDbAlbum();
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public:
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/**
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* Add a category item. If the record already exists, its counter will
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* be incremented.
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* @param aName: This is the name to be entered into the row
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* @param aDriveId: The Drive Id the name (category) belongs
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* @param aNewRecord: indicates to the caller if a new record is created.
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* ETrue if a new row is created in the table; otherwise EFalse.
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* @param aCaseSensitive indicates whether case sensitivity should be taken
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* into consideration when generating the unique row id
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* @return The unique id of the row added.
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*/
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TUint32 AddItemL(const TDesC& aName, const TDesC& aArtistName, const TDesC& aArt, TInt aDriveId, TBool& aNewRecord,
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TBool aCaseSensitive = ETrue);
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/**
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* Decrement the number of songs for the item. If the count gets to 0, remove
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* the item.
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* @param aId: The ID of the category to delete.
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* @param aDriveId: The drive Id the name (category) belongs to. Songs on different
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* drives may belong to the same album or artist; consequently, one
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* row for each artist/album id and drive ID pair will exist in the
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* lookup table with a count existing for each row that tracks the
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* number number of songs on that drive with that album/artist.
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* @param aItemChangedMessages if valid on return contains a deleted message if the
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* category was deleted
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* @param aItemExist Out parameter, ETrue if the category is not deleted after the delete,
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* EFalse otherwise
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* @param aArtist: The ID of the artist
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* @param aArt: The albumart uri
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*/
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void DecrementSongsForCategoryL(TUint32 aId, TInt aDriveId,
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CMPXMessageArray* aItemChangedMessages, TBool& aItemExist, const TUint32 aArtist, const TDesC& aArt );
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/**
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* Gets the details for all category items.
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* @param aAttrs attributes to be returned
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* @param aMediaArray returns the requested attributes for all items
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*/
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void GetAllCategoryItemsL(const TArray<TMPXAttribute>& aAttrs,
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CMPXMediaArray& aMediaArray);
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/**
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* Update a category item.
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* @param aId: The ID of the category to update
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* @param aMedia: The media data
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* @param aDriveId: The Drive Id the name (category) belongs
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* @param aItemChangedMessages: if valid on return contains a updated message if the
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* category was updated
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*/
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void UpdateItemL(TUint32 aId, const CMPXMedia& aMedia, TInt aDriveId, CMPXMessageArray* aItemChangedMessages);
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public:
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/**
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* Get albums count for a specified artist
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* @param aId: The ID of the artist
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*/
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TInt GetAlbumsCountForArtistL(TUint32 aArtistId);
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/**
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* Get songs count for a specified album and a specified artist
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* @param aArtistId: The ID of the artist
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* @param aAlbumId: The ID of the album
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*/
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TInt GetSongsCountInAlbumMatchingArtistL(TUint32 aArtistId, TUint32 aAlbumId);
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private:
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/**
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* Updates the media with information from the table
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* @param aRecord record containing the source fields
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* @param aAttrs attributes to be returned
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* @param aMedia returns the requested attributes
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*/
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void UpdateMediaL(RSqlStatement& aRecord, const TArray<TMPXAttribute>& aAttrs,
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CMPXMedia& aMedia);
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/**
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* Generate searching criteria for album table from the given criteria
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* @param aMedia media data
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* @param aFields fields of Album table
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* @param aValues values of each field of Album table
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* @return a string containing the selection criteria. The ownership is passed to the caller.
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*/
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void GenerateAlbumFieldsValuesL(const CMPXMedia& aMedia,
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CDesCArray& aFields, CDesCArray& aValues);
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TBool IsUnknownArtistL(TUint32 aId);
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/**
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* Get the ArtistName of song which belongs to the specified Album.
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* @param aId The ID of the album
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* @returns alternative artistname retrieved in the specified Album.
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*/
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HBufC* ArtistForAlbumL(const TUint32 aId);
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/**
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* Get the Albumart of song which belongs to the specified Album.
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* @param aId The ID of the album
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* @param aArt albumart with the song is deleted.
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* @returns alternative albumart retrieved in the specified Album.
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*/
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HBufC* AlbumartForAlbumL(const TUint32 aId, TPtrC aArt);
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/**
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* Processes a recordset by constructing media instances and adding them
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* to the specified array.
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* @param aAttrs attributes to be returned
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* @param aRecordset recordset to be processed
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* @param aMediaArray returns the media instances
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*/
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void ProcessAlbumRecordSetL(const TArray<TMPXAttribute>& aAttrs,
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RSqlStatement& aRecordset, CMPXMediaArray& aMediaArray);
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private: // from MMPXTable
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/**
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* @see MMPXTable
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*/
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virtual void CreateTableL(RSqlDatabase& aDatabase, TBool aCorruptTable);
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/**
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* @see MMPXTable
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*/
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virtual TBool CheckTableL(RSqlDatabase& aDatabase);
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private:
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/**
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* C++ constructor.
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* @param aDbManager database manager to use for database interactions
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* @param aCategory identifies the category
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*/
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CMPXDbAlbum(CMPXDbManager& aDbManager, TMPXGeneralCategory aCategory, MMPXDbAlbumObserver& aObserver);
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/**
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* Second phase constructor.
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*/
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void ConstructL();
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public:
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/**
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* Column indexes in the category tables
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*/
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enum TAlbumColumns
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{
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EAlbumUniqueId = KMPXTableDefaultIndex,
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EAlbumArtistName,
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EAlbumName,
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EAlbumSongCount,
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EAlbumArt,
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EAlbumFieldCount
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};
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private: // Data
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MMPXDbAlbumObserver& iObserver;
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};
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#endif // MPXDBALBUM_H
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// End of File
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