mpserviceplugins/mpxsqlitedbhgplugin/inc/mpxdbautoplaylist.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 14 May 2010 15:49:53 +0300
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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 the auto playlist functionality.
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*
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*/
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#ifndef MPXDBAUTOPLAYLIST_H
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#define MPXDBAUTOPLAYLIST_H
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// INCLUDES
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#include <e32base.h>
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#include <mpxattribute.h>
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// CLASS FORWARDS
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class CMPXMedia;
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class CMPXMediaArray;
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class CMPXDbManager;
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// CLASS DECLARATION
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/**
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* Responsible for managing the music table
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*
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* @lib MPXDbPlugin.lib
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*/
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class CMPXDbAutoPlaylist :
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    public CBase
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    {
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    public:
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        /**
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        * Two-phased constructor.
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        * @return new CMPXDbAutoPlaylist instance.
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        */
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        static CMPXDbAutoPlaylist* NewL(CMPXDbManager& aDbManager, RFs& aFs, CMPXResource& aResource);
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        /**
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        * Two-phased constructor.
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        * @return new CMPXDbAutoPlaylist instance on the cleanup stack.
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        */
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        static CMPXDbAutoPlaylist* NewLC(CMPXDbManager& aDbManager, RFs& aFs, CMPXResource& aResource);
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        /**
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        * Destructor
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        */
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        virtual ~CMPXDbAutoPlaylist();
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    public:
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        /**
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        * Get the playlist ID of an auto-playlist by type
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        * @param aPlaylistType type of the auto-playlist
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        * @return auto playlist ID
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        * @leave KErrNotSupported if invalid playlist type
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        */
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        TUint32 AutoPlaylistIdL(TMPXAutoPlaylistType aPlaylistType);
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        /**
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        * Get the name of an auto playlist
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        * @param aPlaylistId identifies the playlist
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        * @return the name of the playlist
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        * @leave KErrNotSupported if invalid playlist ID
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        */
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        TPtrC AutoPlaylistNameL(TUint32 aPlaylistId);
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        /**
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        * Checks whether the playlist ID corresponds to an auto playlist or not.
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        * @param aPlaylistId identifies the playlist
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        * @return Auto playlist type or EMPXNoAutoPlaylist if not found
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        */
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        TMPXAutoPlaylistType AutoPlaylistTypeL(TUint32 aPlaylistId);
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        /**
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        * Get information on a specified playlist
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        * @param aPlaylistId identifies the playlist
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        * @param aAttrs the attributes to include for the playlists found.
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        * @param aMedia returns the playlist information
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        * @leave KErrNotSupported if invalid playlist ID
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        */
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        void GetPlaylistL(TUint32 aPlaylistId, const TArray<TMPXAttribute>& aAttrs,
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            CMPXMedia& aMedia);
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        /**
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        * Get information on all auto playlists
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        * @param aMediaArray returns information on all auto playlists
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        */
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        void GetAllPlaylistsL(CMPXMediaArray& aMediaArray);
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    private:
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        /**
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        * Get count and duration information of the auto-playlist
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        * @param aType the type of the auto-playlist
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        * @param aCount reference to count to be returned
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        * @param aDuration reference to duration to be returned
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        */
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        void GetPlaylistDetailsL(TMPXAutoPlaylistType aType, TInt& aCount, TInt& aDuration);
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        /**
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        * Update the media with information about the auto-playlist
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        * @param aPlaylistId Id of the auto-playlist
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        * @param aAttrs the attributes to include for the playlist matching the
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        *        selection criteria
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        * @param aMedia the playlist details object
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        */
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        void UpdateMediaL(TUint32 aPlaylistId, const TArray<TMPXAttribute>& aAttrs,
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            CMPXMedia& aMedia);
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    private:
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        /**
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        * C++ constructor
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        */
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        CMPXDbAutoPlaylist(CMPXDbManager& aDbManager);
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        /**
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        * Second phase constructor
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        */
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        void ConstructL(RFs& aFs, CMPXResource& aResource);
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    private:    // Data
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        TUint32             iRecentlyPlayedPlaylistId; // recently played playlist ID
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        TUint32             iMostPlayedPlaylistId;     // most played playlist ID
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        TUint32             iRecentlyAddedPlaylistId;  // recently added playlist ID
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        // owned
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        HBufC*              iRecentlyPlayedPlaylist;   // recently played playlist name
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        HBufC*              iMostPlayedPlaylist;       // most played playlist name
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        HBufC*              iRecentlyAddedPlaylist;    // recently added playlist name
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        CMPXDbManager&      iDbManager;
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    };
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#endif // MPXDBAUTOPLAYLIST_H
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// End of File