/*

* Copyright (c) 2004-2009 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:

* Name          : compressinglogic.h

* Part of       : SIP SigComp Controller

* Version       : SIP/3.0 

*

*/

/**

 @internalComponent

*/

#ifndef __COMPRESSINGLOGIC_H__

#define __COMPRESSINGLOGIC_H__

#include <e32base.h>

#include <in_sock.h>

// FORWARD DECLARATIONS

class CSIPResponse;

class CSIPRequest;

class CSIPMessage;

class CSIPURI;

class MSigCompOwner;

class CSIPViaHeader;

class TSIPTransportParams;

// CLASS DEFINITION

class CSigCompCompressingLogic : public CBase

	{

public: // Constructors and destructor

	static CSigCompCompressingLogic* NewL( MSigCompOwner& aSigCompOwner );

	static CSigCompCompressingLogic* NewLC( MSigCompOwner& aSigCompOwner );

	~CSigCompCompressingLogic();

public:

	CBufBase* EncodeL( const TSIPTransportParams& aTransportParams,

	                   CSIPResponse& aResponse,

                       const TInetAddr& aAddress,

                       TBool aStreambasedProtocol, 

                       TBool& aCompressed );

	CBufBase* EncodeL( const TSIPTransportParams& aTransportParams,

	                   CSIPRequest& aRequest,

                       const TInetAddr& aAddress,

                       TBool aStreambasedProtocol, 

                       TBool& aCompressed );

private:

	CSigCompCompressingLogic( MSigCompOwner& aSigCompOwner );

	TBool CompInVia( CSIPMessage& aMessage );

	void SetCompToTopViaL( CSIPMessage& aMessage );

	void DeleteCompFromTopVia( CSIPMessage& aMessage );

	CSIPViaHeader* TopViaHeader( CSIPMessage& aMessage );

	TBool HasSigCompParam( CSIPURI& aURI ) const;

	TBool ShouldBeCompressL( const TSIPTransportParams& aTransportParams,

	                         CSIPRequest& aRequest );

	TBool ShouldBeCompressL( CSIPResponse& aResponse );

	void AddSigCompToContactsL( CSIPMessage& aMessage );

	void SetCompEqualSigCompL( CSIPURI& aURI );

	void RemoveCompEqualSigComp( CSIPURI& aURI );

	CSIPURI* SigCompUriFromRequest( CSIPRequest& aRequest );

private: // Data

	MSigCompOwner& iSigCompOwner;

	};

#endif // end of __COMPRESSINGLOGIC_H__

// End of File