/*

* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members

* which accompanies this distribution, and is available

* at the URL "http://www.symbianfoundation.org/legal/licencesv10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

* Name        : sipinvitedialogassoc.h

* Part of     : SIP Client

* Interface   : SDK API, SIP Client API

* Version     : 1.0

*

*/

#ifndef CSIPINVITEDIALOGASSOC_H

#define CSIPINVITEDIALOGASSOC_H

// INCLUDES

#include "sipdialogassocbase.h"

// CONSTANTS

// FORWARD DECLARATIONS

class CUri8;

class CSIPConnection;

class CSIPServerTransaction;

class CSIPFromHeader;

class CSIPToHeader;

class CSIPContactHeader;

class MSIPRegistrationContext;

// CLASS DECLARATION

/**

*  @publishedAll

*  @released

*

*  Class for managing SIP dialog association created with INVITE.

*  It provides services for creating, using and

*  terminating SIP INVITE dialog association.

*

*  The user can have only one INVITE dialog association per dialog.

* 

*  @lib sipclient.lib

*/

class CSIPInviteDialogAssoc : public CSIPDialogAssocBase

	{

	public: // Constructors and destructor

		/**

		* Two-phased constructor.

		* @param aDialog a dialog to be associated with

        * @return New object, ownership is transferred.

		*/

		IMPORT_C static CSIPInviteDialogAssoc* NewL(CSIPDialog& aDialog);

        /**

		* Two-phased constructor.

		* @param aDialog a dialog to be associated with

        * @return New object, ownership is transferred.

		*/

		IMPORT_C static CSIPInviteDialogAssoc* NewLC(CSIPDialog& aDialog);

        /**

        * Two-phased constructor.

        * Should be used if response to the received SIP request will create

        * a SIP dialog association.

        * The server transaction must be a INVITE transaction.

        * If SIP server transaction was received within an existing SIP dialog

        * the created SIP dialog association will be correlated to that SIP

        * dialog. Otherwise a new SIP dialog is created.

        * @pre aTransaction.State() == CSIPTransactionBase::EProceeding

        * @pre aTransaction.Type() == SipStrConsts::EInvite

        * @param aTransaction a SIP server transaction 

        * @return New object, ownership is transferred.

        * @leave KErrArgument if aTransaction.Type() != SipStrConsts::EInvite

        * @leave KErrSIPInvalidTransactionState if aTransaction.State() !=

        *	CSIPTransactionBase::EProceeding

        * @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

        */

        IMPORT_C static CSIPInviteDialogAssoc*

            NewL(CSIPServerTransaction& aTransaction);

        /**

        * Two-phased constructor.

        * Should be used if response to the received SIP request will create a

        * SIP dialog association.

        * The server transaction must be a INVITE transaction.

        * If SIP server transaction was received within the existing SIP dialog

        * the created SIP dialog association will be correlated to that

        * SIP dialog.  Otherwise a new SIP dialog is created.

		* @pre aTransaction.State() == CSIPTransactionBase::EProceeding

		* @pre aTransaction.Type() == SipStrConsts::EInvite

        * @param aTransaction a SIP server transaction

        * @return New object, ownership is transferred.

        * @leave KErrArgument if aTransaction.Type() != SipStrConsts::EInvite

        * @leave KErrSIPInvalidTransactionState if aTransaction.State() !=

        *	CSIPTransactionBase::EProceeding

        * @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

        */

        IMPORT_C static CSIPInviteDialogAssoc*

            NewLC(CSIPServerTransaction& aTransaction);

        /**

        * Two-phased constructor.

        * Should be used if response to the received SIP request will create

        * a SIP dialog association.

        * The server transaction must be a INVITE transaction.

        * If SIP server transaction was received within an existing SIP dialog

        * the created SIP dialog association will be correlated to that SIP

        * dialog. Otherwise a new SIP dialog is created.

        * @pre aTransaction.State() == CSIPTransactionBase::EProceeding

        * @pre aTransaction.Type() == SipStrConsts::EInvite

		* @pre aContext.IsContextActive() == ETrue        

        * @param aTransaction a SIP server transaction 

        * @param aContext that will be used for populating 

        *        the Contact-header of the response to aTransaction

        * @return New object, ownership is transferred.

        * @leave KErrArgument if aTransaction.Type() != SipStrConsts::EInvite

        * @leave KErrSIPInvalidTransactionState if aTransaction.State() !=

        *	CSIPTransactionBase::EProceeding

        * @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

        */

        IMPORT_C static CSIPInviteDialogAssoc*

            NewL(CSIPServerTransaction& aTransaction,

                 const MSIPRegistrationContext& aContext);

        /**

        * Two-phased constructor.

        * Should be used if response to the received SIP request will create a

        * SIP dialog association.

        * The server transaction must be a INVITE transaction.

        * If SIP server transaction was received within the existing SIP dialog

        * the created SIP dialog association will be correlated to that

        * SIP dialog.  Otherwise a new SIP dialog is created.

		* @pre aTransaction.State() == CSIPTransactionBase::EProceeding

		* @pre aTransaction.Type() == SipStrConsts::EInvite

		* @pre aContext.IsContextActive() == ETrue 

        * @param aTransaction a SIP server transaction

        * @param aContext that will be used for populating 

        *        the Contact-header of the response to aTransaction        

        * @return New object, ownership is transferred.

        * @leave KErrArgument if aTransaction.Type() != SipStrConsts::EInvite

        * @leave KErrSIPInvalidTransactionState if aTransaction.State() !=

        *	CSIPTransactionBase::EProceeding

        * @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

        */

        IMPORT_C static CSIPInviteDialogAssoc*

            NewLC(CSIPServerTransaction& aTransaction,

                  const MSIPRegistrationContext& aContext);

        /**

        * Two-phased constructor

        * @pre aFrom != 0

        * @pre aRemoteUri != 0

		* The user of the class must not define tags in From-header

		* and To-header.        

        * @param aConnection a SIP connection to be used with

        *        dialog association

        * @param aFrom originator's address; the ownership is transfered

        * @param aRemoteUri a remote target URI that identifies a resource that

        *		 the request is addressed to. The ownership is transferred.

        * @param aTo logical recipient's address; if not defined

        *        the remote target uri will be used for To-header

        *        construction; the ownership is transfered

        * @param aContact a contact to be used in dialog creation. Must be

        *        given only if user intends to re-direct future requests; 

        *        the ownership is transfered        

        * @return New object, ownership is transferred.

        * @leave KErrArgument if aFrom == 0 or aRemoteUri == 0

        */

        IMPORT_C static CSIPInviteDialogAssoc*

            NewL(CSIPConnection& aConnection,

                 CSIPFromHeader* aFrom,

                 CUri8* aRemoteUri,

                 CSIPToHeader* aTo=0,

                 CSIPContactHeader* aContact=0);

        /**

        * Two-phased constructor

        * @pre aFrom != 0

        * @pre aRemoteUri != 0

		* The user of the class must not define tags in From-header

		* and To-header.

        * @param aSIPConnection a SIP connection to be used with

        *        dialog association

        * @param aFrom originator's address; the ownership is transfered

        * @param aRemoteUri a remote target URI that identifies a resource that

        *		 the request is addressed to. The ownership is transferred.

        * @param aTo logical recipient's address; if not defined

        *        the remote target uri will be used for To-header

        *        construction; the ownership is transfered

        * @param aContact a contact to be used in dialog creation. Must be

        *        given only if user intends to re-direct future requests; 

        *        the ownership is transfered

        * @return New object, ownership is transferred.

        * @leave KErrArgument if aFrom == 0 or aRemoteUri == 0

        */

        IMPORT_C static CSIPInviteDialogAssoc*

            NewLC(CSIPConnection& aConnection,

                  CSIPFromHeader* aFrom,

                  CUri8* aRemoteUri,

                  CSIPToHeader* aTo=0,

                  CSIPContactHeader* aContact=0);

        /**

        * Two-phased constructor

		* @pre aRemoteUri != 0

		* The user of the class must not define tags in From-header

		* and To-header.

        * @pre aContext.IsContextActive() == ETrue

        * @param aConnection a SIP connection to be used with

        *        dialog association        

        * @param aRemoteUri a remote target URI that identifies a resource

        *		 that the request is targeted to. The ownership is transferred.

        * @param aContext used for selecting outbound 

        *        proxy and originator's address (AOR) and contact

        * @param aFrom originator's address. If not defined it will

        *        constructed using registration context (User's AOR);

        *        the ownership is transfered

        * @param aTo logical recipient's address; if not defined

        *        the remote target uri will be used for To-header

        *        construction; the ownership is transfered

        * @param aContact a contact to be used in dialog creation. Must be

        *        given only if user intends to re-direct future requests; 

        *        the ownership is transfered

        * @return New object, ownership is transferred.

        * @leave KErrArgument if aRemoteUri == 0

        * @leave KErrSIPInvalidRegistrationState

        *		 if aContext.IsContextActive() == EFalse

        */

        IMPORT_C static CSIPInviteDialogAssoc*

            NewL(CSIPConnection& aConnection,                                    

                 CUri8* aRemoteUri,

                 const MSIPRegistrationContext& aContext,

                 CSIPFromHeader* aFrom=0,

	             CSIPToHeader* aTo=0,

	             CSIPContactHeader* aContact=0);

        /**

		* Two-phased constructor		

		* @pre aRemoteUri != 0

		* The user of the class must not define tags in From-header

		* and To-header.

		* @pre aContext.IsContextActive() == ETrue

		* @param aConnection a SIP connection to be used with

		*        dialog association		

		* @param aRemoteUri a remote target URI that identifies a resource

		*		 that the request is targeted to. The ownership is transferred.

        * @param aContext used for selecting outbound 

        *        proxy and originator's address (AOR) and contact

        * @param aFrom originator's address. If not defined it will

        *        constructed using registration context (User's AOR);

        *        the ownership is transfered

        * @param aTo logical recipient's address; if not defined

        *        the remote target uri will be used for To-header

        *        construction; the ownership is transfered

        * @param aContact a contact to be used in dialog creation. Must be

        *        given only if user intends to re-direct future requests; 

        *        the ownership is transfered

        * @return New object, ownership is transferred.

        * @leave KErrArgument if aRemoteUri == 0

        * @leave KErrSIPInvalidRegistrationState

        *		 if aContext.IsContextActive() == EFalse

		*/

        IMPORT_C static CSIPInviteDialogAssoc*

            NewLC(CSIPConnection& aConnection,			                        

			      CUri8* aRemoteUri,

                  const MSIPRegistrationContext& aContext,

                  CSIPFromHeader* aFrom=0,

	              CSIPToHeader* aTo=0,

	              CSIPContactHeader* aContact=0);

		/**

		* Destructor

		*/

		IMPORT_C ~CSIPInviteDialogAssoc();

	public: // New functions

		/**

		* Creates INVITE and sends it to the remote target.

		* 101-199 or 2xx response will create INVITE dialog association in case

		* of first INVITE within this dialog association. Subsequent INVITE

		* requests are re-INVITEs.

		* @pre Dialog().Connection().State()==EActive

		* @pre Dialog().State()==CSIPDialog::EInit ||

		*      Dialog().State()==CSIPDialog::EConfirmed

		* @param aElements contains user SIP headers and content. Ownership is

        *   transferred.

		* @return INVITE SIP transaction. Ownership is transferred.

		* @leave KErrSIPInvalidDialogState if dialog is not in a correct state

		* @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

		* @capability NetworkServices

		*/

		IMPORT_C CSIPClientTransaction*

            SendInviteL(CSIPMessageElements* aElements=0);

        /**

		* Creates PRACK and sends it to the remote target.		

		* @pre Dialog().Connection().State()==EActive

		* @pre Dialog().State()==CSIPDialog::EEarly || 

		*      Dialog().State()==CSIPDialog::EConfirmed

        * @pre aElements must not contain Contact headers

		* @param aElements contains user SIP headers and content. Ownership is

        *   transferred.

		* @return PRACK SIP transaction. Ownership is transferred.

		* @leave KErrSIPInvalidDialogState if dialog is not in a correct state

		* @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

		* @capability NetworkServices

		*/

		IMPORT_C CSIPClientTransaction*

            SendPrackL(CSIPMessageElements* aElements=0);

	    /**

		* Creates UPDATE and sends it to the remote target.

		* @pre Dialog().Connection().State()==EActive

		* @pre Dialog().State()==CSIPDialog::EEarly || 

		*      Dialog().State()==CSIPDialog::EConfirmed

		* @param aElements contains user SIP headers and content. Ownership is

        *   transferred.

		* @return UPDATE SIP transaction. Ownership is transferred.

		* @leave KErrSIPInvalidDialogState if dialog is not in a correct state

		* @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

		* @capability NetworkServices

		*/

		IMPORT_C CSIPClientTransaction*

            SendUpdateL(CSIPMessageElements* aElements=0);

		/**

		* Creates SIP ACK request and sends it to the remote target.

		* The client transaction must be an INVITE transaction.

		* @pre Dialog().Connection().State()==EActive

		* @pre Dialog().State()==CSIPDialog::EConfirmed

		* @param aTransaction a SIP INVITE client transaction to acknowledge

		* @param aElements optional SIP message headers and body. Ownership is

        *   transferred.

        * @leave KErrArgument if aTransaction is not an INVITE transaction.

        * @leave KErrSIPInvalidDialogState if ACK can't be sent in the current

		*	dialog state

        * @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

		* @capability NetworkServices

		*/

		IMPORT_C void SendAckL(const CSIPClientTransaction& aTransaction,

			                   CSIPMessageElements* aElements=0);

	    /**

		* Creates SIP BYE request and sends it to the remote target.		

		* @pre Dialog().Connection().State()==EActive

		* @pre Dialog().State()==CSIPDialog::EEarly || 

		*      Dialog().State()==CSIPDialog::EConfirmed

		* @param aElements contains user SIP headers and content. Ownership is

        *   transferred.

		* @return SIP BYE transaction. Ownership is transferred.

		* @leave KErrSIPInvalidDialogState if BYE can't be sent in the current

		*	dialog state

		* @leave KErrSIPResourceNotAvailable if a required SIP Client API

		*	object has been deleted

		* @capability NetworkServices

		*/		

		IMPORT_C CSIPClientTransaction*

            SendByeL(CSIPMessageElements* aElements=0);

	public: // New functions, for internal use

        /**

		* Sends initial INVITE creating a dialog and creates a transaction for

        * it.

		* @param aElements contains user SIP headers and content. Ownership is

        *   transferred.

		* @return INVITE SIP transaction. Ownership is transferred.

		*/

        CSIPClientTransaction* DoSendInviteL(CSIPMessageElements* aElements);

        /**

		* Sends ACK		

		* @param aTransaction a SIP INVITE client transaction to acknowledge

		* @param aElements optional SIP message headers and body. Ownership is

        *   transferred.

		*/

        void DoSendAckL(const CSIPClientTransaction& aTransaction,

                        CSIPMessageElements* aElements);

		CSIPClientTransaction*

			DoSendRequestWithinDialogL(RStringF aMethod,

									   CSIPMessageElements* aElements);

        CSIPClientTransaction* DoSendCancelL(TUint32 aRequestId);

   	private: // Constructors

		static CSIPInviteDialogAssoc* NewLC(CSIPConnection& aConnection,

								 CUri8* aRemoteUri,

	                             CSIPFromHeader* aFrom,

	                             CSIPToHeader* aTo,

		                         CSIPContactHeader* aContact,

		                         const MSIPRegistrationContext* aContext);

		CSIPInviteDialogAssoc();

		void ConstructL(CSIPServerTransaction& aTransaction,

                        const MSIPRegistrationContext* aContext);

	};

#endif