internetradio2.0/songhistoryinc/irsonghistorydb.h
author Pat Downey <patd@symbian.org>
Tue, 18 May 2010 11:36:57 +0100
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permissions -rw-r--r--
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/*
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* Copyright (c) 2006-2006 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:  Song History database used for stroing song history entries.
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*
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*/
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/* ---------------------------------------------------------------------------
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*  Version history:
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*  Template version:
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*  <ccm_history>
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*
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*  Version: 3, Thu Apr 14 12:00:00 2008 by Rohit
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*  Ref:
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*  Pc lint fixes
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*
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*  Version: 2, Thu Apr 10 20:00:00 2008 by Rohit
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*  Ref:
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*  Implemented SongHistory changes for channelwise songs
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*
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*  </ccm_history>
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* ============================================================================
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*/
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#ifndef CIRSONGHISTORYDB_H
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#define CIRSONGHISTORYDB_H
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#include <d32dbms.h>
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#include "irsettings.h"
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class CIRSongHistoryInfo;
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class CIRSettings;
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// Maximum no of entries to be stored in the history list.
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const TInt KMaxNoChannelHistoryDbEntries = 30;
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const TInt KMaxNoSongHistoryDbEntries = 100;
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// Maximum length of Dbms field string
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const TInt KIRDbMaxStrLen = 255;
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const TInt KIRDbMaxChType = 2;
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NONSHARABLE_CLASS(CIRSongHistoryDb) : public RDbNamedDatabase
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	{
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//member functions
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public:
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	/**
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	* Function : NewL()
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	* Two phased construction
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	* @return instance of CIRSongHistoryDb
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	*/
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		static CIRSongHistoryDb* NewL();
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	/**
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	* Function : NewLC()
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	* Two phased construction
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	* @return instance of CIRSongHistoryDb
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	*/
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		static CIRSongHistoryDb* NewLC();
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	/**
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	* Function : ~CIRSongHistoryDb()
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	* default destructor
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	*/
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		~CIRSongHistoryDb();
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	/**
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	* Function : AddToSongHistoryDbL()
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	* adds the song history entry into data base
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	* @param various channel information 
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	*/
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	TBool AddToSongHistoryDbL( const TDesC& aSongName,
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								const TDesC& aArtistName, 
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								const TDesC& aChannelName, 
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								const TDesC& aChannelUrl,
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								RBuf& aDelSongName, 
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								RBuf& aDelArtistname, 
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								RBuf& aDelChannelName, 
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								RBuf& aDelChannelUrl,
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								TInt  aChannelType,
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								TInt aChannelId,
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								TInt aBitrate,
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								const TDesC& aChannelDesc,
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								const TDesC& aImageUrl,
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								const TDesC& aMusicFlag);
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	 /**
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	 * Function : AddToSongHistoryDb2L()
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	 * adds the song history entry into data base
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	 * @param various song information 
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	 */
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	 TBool AddToSongHistoryDb2L( const TDesC& aSongName,
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	                             const TDesC& aArtistName, 	                                
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	                             const TDesC& aMusicFlag);
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	/**
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	* CIRSongHistoryDb::GetAllSongHistoryListL()
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	* gets all the song history entries  into an array
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	* @param aSongHistoryEntries is the array which is to be filled by the SongHistoryDb. 
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	*/
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		void GetAllSongHistoryListL(RPointerArray<CIRSongHistoryInfo>& aSongHistoryEntries);
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    /**
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	* CIRSongHistoryDb::GetAllSongHistoryList2L()
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	* gets all the song history entries  into an array
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	* @param aSongEntries is the array which is to be filled by the SongHistoryDb. 
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	*/
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		void GetAllSongHistoryList2L(RPointerArray<CIRSongHistoryInfo>& aSongEntries);
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	/**
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	* Function : ClearAllSongHistoryFromDb
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	* delete all the song entries from the database.
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	*/
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		TInt ClearAllSongHistoryFromDb();
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	/**
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	* Function : ClearAllSongHistoryFromDb2
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	* delete all the song entries from the database.
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	*/
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		TInt ClearAllSongHistoryFromDb2();
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	/**
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	* Function : CountSongHistoryDb()
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	* count the database entries
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	*/
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		TInt CountSongHistoryDb();
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	/**
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	* Function : CountSongHistoryDb2()
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	* count the database entries
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	*/
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		TInt CountSongHistoryDb2();
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	/**
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	* Function : GetLastHistoryItemL()
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	* Gives the last added entry in the database
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	* @param Channel data to be filled .
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	*/
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	void GetLastHistoryItemL(RBuf& aSongName, RBuf& aArtistName,
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					 RBuf& aChannelName, RBuf& aChannelUrl);
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	/**
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	* Function : GetChannelSongsCount()
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	* Returns SongsCount for given channel
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	*/
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	TUint GetChannelSongsCountL( const RBuf& aChannelName, const RBuf& aChannelUrl );
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	/**
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	* Function : GetChannelSongsCount()
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	* Updates the song history DB when there is a channel removed in the isds.
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	*/
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    void SyncSongHistoryDbL(TInt aChannelId) ;
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	/**
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	* Function : GetIdPresentInDb()
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	* Gets whether the particular channel ID is present in history DB or not. 
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	*/
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    TBool GetIdPresentInDbL(TInt aChannelId) ;
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	/**
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	* Function : UpdateSongHistoryDb()
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	* Updates the song history DB when there is a channel change in the isds.
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	*/
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    TInt UpdateSongHistoryDbL( TInt aChannelId,
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    	                      const TDesC& aChannelName, 
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						      const TDesC& aChannelUrl,
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						      const TDesC& aImageUrl,
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							  const TDesC& aMusicFlag);
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    /*
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     * search if a record already exists in database. If yes, delete it.
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     */
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    void SearchAndDeleteRecordL(const TDesC& aChannelName, const TDesC& aChannelUrl,
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                                TInt aChannelType);
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    /*
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     * delete a recorder by the index
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     * */
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    TInt DeleteOneHistory(TInt aIndex);
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private:
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	/**
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	* Function : ConstructL()
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	* two phase construction
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	*/
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    void ConstructL();
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    /**
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	* Function : CloseSongHistoryDb()
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	* Closes the database
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	*/
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	void CloseSongHistoryDb();
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	/**
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	* Function : CreateSongHistoryTablesL()
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	* creates songhistory table with three columns
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	* log data
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	* ---------------------------------------------------------------------------
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	* SongHistoryTable
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	*---------------------------
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	*| SongName | ArtistName | ChannelName | ChannelUrl | ChannelType | ChannelId | Bitrate | ChannelDesc | ImageUrl
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	*---------------------------
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	*|EDbColText| EDbColText | EDbColText | EDbColText | EDbColUint8 | EDbColUint16 | EDbColUint16 | EDbColText | EDbColText
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	*----------------------------------------------------------------------------
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	*/
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	void CreateSongHistoryTablesL();
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    /**
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	* Function : CreateSongHistoryTables2L()
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	* creates songhistory table with three columns
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	* log data
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	* ---------------------------------------------------------------------------
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	* SongHistoryTable
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	*---------------------------
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	*| SongName | ArtistName | MusicStatusFlag
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	*---------------------------
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	*|EDbColText| EDbColText | EDbColText |
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	*----------------------------------------------------------------------------
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	*/
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	void CreateSongHistoryTables2L();
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   /**
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	* Function : CreateDbCondition()
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	* Creates  the dbms file conditionally(only if not yet created)
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	* @param aSongHistoryDbFile the Database file name
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	*/
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	void CreateDbCondition(const TFileName& aSongHistoryDbFile);
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	/**
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	* Function : OpenSongHistoryDbL()
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	* @param aSongHistoryDbFile the Database file name
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	* opening the data base
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	*/
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	void OpenSongHistoryDbL(const TFileName& aSongHistoryDbFile);
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	/**
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	* Function : CreateSongHistoryDb()
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	* creates the dbms files
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	* @param aSongHistoryDbFile database filename
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	*/
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	TInt CreateSongHistoryDb(const TFileName& aSongHistoryDbFile);
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	/**
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	 * to wrapper the delete leaving
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	 */
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	TInt DeleteOneHistoryL(TInt aIndex);
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	/**
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	* Data-structure to hold unique channel info
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	*/
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	class CIRChannelInfo : public CBase
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	{
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	public:
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		~CIRChannelInfo()
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		{
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			iChannelUrl.Close();
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			iChannelName.Close();
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		}
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		RBuf iChannelUrl;
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		RBuf iChannelName;
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		TInt iChannelType;
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	};
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	/**
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	* Comparer function to compare two CIRChannelInfo's
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	*/
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	static TBool CompareChannelInfos(const CIRChannelInfo& aFirst, const CIRChannelInfo& aSecond);
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//data members
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private:
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	//	File session
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    RFs iFsSession;
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     //	Table which stores History information
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    RDbTable iSongHistoryTable;
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    // only save the song info for the song history view.
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	RDbTable iSongHistoryTable2;
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    };
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#endif  //CIRSONGHISTORYDB_H
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