/*

* Copyright (c) 2005-2007 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:  Capability query observer 

*

*/

#ifndef MMUSAVACAPABILITYQUERYOBSERVER_H

#define MMUSAVACAPABILITYQUERYOBSERVER_H

#include <sipstrconsts.h>

#include <bamdesca.h>

class CMusAvaCapabilityQueryBase;

/**

 * Capability Query Observer

 *

 * @lib musavailabilityplugin.lib

 */

class MMusAvaCapabilityQueryObserver

    {

public: 

    virtual void CapabilitiesResolved( const CMusAvaCapabilityQueryBase& aSentQuery ) = 0;

    virtual void CapabilitiesResolvedL( const TDesC& aUri ) = 0;

    virtual void SetCapabilitiesResolvedForCingular() = 0;

    virtual TBool CapabilitiesResolvedForCingular() = 0;

    /**

     * This is to advertise MMusAvaCapabilityQueryObserver implementors

     * about sip header change. It is mainly used in below scneraio but could

     * be used in future if anyother sip headers has to be set.

     * 

     * Incase if we receive OPTIONS request already and 

     * P-Asserted-Identity Header is present then OPTIONS

     * request should be sent to this ID. This function should be

     * called to configure this id in CMusAvaSettingsImp& iSettings

     *

     * @aHeaders Array of SIP Headers.    

     * @aHeaderType Type of the header.

     * Leavs if Array is empty or pointer is NULL.

     * Ownership Transferred.

     */

    virtual void SipHeadersL(const MDesCArray& aHeaders,

                          SipStrConsts::TStrings aHeaderType)=0;

    /**

     * Advertise about video codec capabilities     

     */

    virtual void VideoCodecsResolvedL( const MDesCArray& aVideoCodecs ) = 0;

    virtual TBool CapabilityQueryAnswered( TBool aAnswered = EFalse ) = 0;

    };

#endif //MMUSAVACAPABILITYQUERYOBSERVER_H