/*

* Copyright (c) 2004-2006 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:  Central repository proxy, which is used by all CR dependent.

*

*/

#ifndef CVTENGCRPROXY_H

#define CVTENGCRPROXY_H

//  INCLUDES

#include <e32base.h>

#include <e32std.h>

#include <centralrepository.h>

// FORWARD DECLARATIONS

class CVtEngCRObserverItem;

class CRepository;

class MVtEngCRSettingObserver;

// CLASS DECLARATION

/**

*  Central repository interface for video telephony.

*

*  @lib videoteleng.lib

*  @since Series 60 3.0

*/

NONSHARABLE_CLASS( CVtEngCRProxy ) : public CBase

    {

    public: // Data structures.

        // Internal data structure for storing CR sessions.

        NONSHARABLE_CLASS( CCRSession ) : public CBase

            {

            public:

                /**

                * Destructor needed.

                */

                ~CCRSession();

            // CenRep session.

            CRepository*    iSession;

            // Uid attached to CenRep session.

            TUid            iUid;

            };

    public:  // Constructors and destructor.

        /**

        * Two-phased constructor.

        * @return instance of CVtEngCRProxy

        */

        static CVtEngCRProxy* NewL( );

        /**

        * Destructor.

        */

        virtual ~CVtEngCRProxy();

    public: // New functions

        /**

        * Sets integer value to Central Repository.

        * @param aUid used UID

        * @param aId which key to use

        * @param aVal a value to set

        * @return error code

        */  

        TInt Set( const TUid aUid, const TUint32 aId, TInt aVal );

        /**

        * Sets real value to Central Repository.

        * @param aUid used UID

        * @param aId which key to use

        * @param aVal a value to set

        * @return error code

        */  

        TInt Set( const TUid aUid, const TUint32 aId, const TReal& aVal );

        /**

        * Sets binary value to Central Repository.

        * @param aUid used UID

        * @param aId which key to use

        * @param aVal a value to set

        * @return error code

        */  

        TInt Set( const TUid aUid, const TUint32 aId, const TDesC8& aVal );

        /**

        * Sets string value to Central Repository.

        * @param aUid used UID

        * @param aId which key to use

        * @param aVal a value to set

        * @return error code

        */  

        TInt Set( const TUid aUid, const TUint32 aId, const TDesC16& aVal );

        /**

        * Gets integer value from Central Repository.

        * @param aUid used UID

        * @param aId which key to use

        * @param aVal a value in return

        * @return error code

        */

        TInt Get( const TUid aUid, const TUint32 aId, TInt& aVal );

        /**

        * Gets real value from Central Repository.

        * @param aUid used UID        

        * @param aId which key to use

        * @param aVal a value in return

        * @return error code

        */

        TInt Get( const TUid aUid, const TUint32 aId, TReal& aVal );

        /**

        * Gets binary value from Central Repository

        * @param aUid used UID        

        * @param aId which key to use

        * @param aVal a value in return

        * @return error code

        */

        TInt Get( const TUid aUid, const TUint32 aId, TDes8& aVal );

        /**

        * Gets string value from Central Repository.

        * @param aUid used UID        

        * @param aId which key to use

        * @param aVal a value in return

        * @return error code

        */

        TInt Get( const TUid aUid, const TUint32 aId, TDes16& aVal );

        /**

        * Add a new Cen Rep interested object.

        * @param aObserver callback interface

        */

        void RegisterInterestedL( CVtEngCRObserverItem* aObserver );

        /**

        * Removes an observer.

        * @param aObserver to be removed

        */

        void RemoveInterested( CVtEngCRObserverItem& aObserver );

    private: // New functions

        /**

        * Gets a Cen Rep session matching UID.

        * @param aUid UID to use in search

        * @param aCRSession found session or a new session

        * @return error code

        */

        TInt GetSessionL( const TUid aUid, CRepository*& aCRSession );    

        /**

        * Creates an id-CenRep paired session.

        * @param aUid the UID to use

        * @return new session or NULL 

        */    

        CCRSession* NewCRSessionL( TUid aUid );

        /**

        * Finds observer item.

        * @param aKey

        * @param aIndex

        * @return observer item or NULL 

        */    

        CVtEngCRObserverItem* FindItem( 

            const TUint32 aKey, TInt& aIndex ) const;

        /**

        * Removes all observers

        * 

        */

        void RemoveAllObservers();

        /**

        * Removes all Central repository instances

        * 

        */

        void RemoveSessions();

        /**

        * Maps a given UID to a certain central repository instance

        * @param aUid the UID to map

        * @return found CRepository item or NULL

        */

        CRepository* MapUidToCR( const TUid aUid );

        /**

        * Finds observer item.

        * @param aUid 

        * @param aKey

        * @param aIndex

        * @return observer item or NULL 

        */

        CVtEngCRObserverItem* FindItem( const TUid& aUid, const TUint32 aKey,

                TInt& aIndex ) const;

    private:

        /**

        * C++ default constructor.

        */

        CVtEngCRProxy();

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL( );

    private:    // Data

        // Storage for data observers.

        RPointerArray<CVtEngCRObserverItem> iObserverItems;

        // Array for central repository sessions.

        RPointerArray<CVtEngCRProxy::CCRSession> iCRSessions;

    };

#endif      // CVTENGCRPROXY_H

// End of File