/*

* Copyright (c) 2008 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:  all observer classes

*

*/

#ifndef MSERVICEWIDGETOBSERVERS_H

#define MSERVICEWIDGETOBSERVERS_H

#include <cchtypes.h>

#include "servicewidgetenums.hrh"

/**

 *  

 *  Observer interface for messages handler	

 *  @dll servicewidgetplugin

 *  @since S60 5.0

 */

class  MServiceWidgetNewMessageObserver 

	{

	public:

			/**

	    	* Gets called when data update is available as new messgae recieved.

	    	* Client can then decide wether to use the old one

	    	* or the updated one.

	    	* @param aSenderId, sender id

	    	* @param aMessageText, new message details

	       	*/

	        virtual void HandleNewMessageL(const TDesC& aSenderId ,const TDesC& aMessageText )  = 0 ;

	        /**

	    	* unread message change notification

	    	* Client can then decide wether to use the old one

	       	*/      

	        virtual void HandleCountChangedL() = 0 ;

	protected :

			/**

			* virtual destructor

			*/

			virtual ~MServiceWidgetNewMessageObserver()

				{

				}

	};

/**

 *  

 *  Observer interface for presence handler	

 *  @dll servicewidgetplugin

 *  @since S60 5.0

 */

class  MServiceWidgetPresenceObserver 

	{

	public:

	    /**

         * Handler for own status change notification

         */    

        virtual void HandleOwnStatusChangeL(TWSPresenceStatus aStatus ) = 0;

		/**

		* Handler for AllBuddiesPresenceInService method of MPresenceCacheReader.

		*

		* @param aErrorCode 

		* @param aPresenceBuddyInfoList presence infos for all buddies requested. 

		* Ownership to callee. Can be null if not found.

		*/    

		virtual void HandleChangeL( ) = 0 ;

        /**

        * from MServiceWidgetPresenceObserver

        * Handler for AllBuddiesPresenceInService method of MPresenceCacheReader.

        * @param aErrorCode 

        * @param aPresenceBuddyInfoList presence infos for all buddies requested. 

        * Ownership to callee. Can be null if not found.

        */    

		virtual void HandleBuddyPresenceChangeL(const TDesC& aBuddyId, 

                                        TWSPresenceStatus aStatus,

                                        const TDesC& aStatusText ) = 0 ;

	    /**

		* Gets called when data update is available as new messgae recieved.

		* Client can then decide wether to use the old one

		* or the updated one.

		* @param aSenderId, sender name

		* @param aMessageText, new message details

		*/

		virtual void HandleAddRequestL(const TDesC& aRequesterId )  = 0  ;

	protected :

			/**

			* virtual destructor

			*/

			virtual ~MServiceWidgetPresenceObserver()

				{

				}

};

 /**

 *  

 *  Observer interface for session state handler	

 *  @dll servicewidgetplugin

 *  @since S60 5.0

 */

class  MServiceWidgetServiceStateObserver 

	{

	public:

	       /**

	         * Handler for service state changes

	         * param aState, service state

	         */    

	        virtual void HandleServiceStatusChangedL( TSWSTRegistrationState aState) = 0;

	protected :

			/**

			* virtual destructor

			*/

			virtual ~MServiceWidgetServiceStateObserver()

				{

				}

	};

/**

 *  

 *  Observer interface for timer 	

 *  @dll servicewidgetplugin

 *  @since S60 5.0

 */

class  MServiceWidgetTimerObserver 

	{

	public:

			/**

	         * Handler for timer expiration

	         */  

	        virtual void HandleTimerExpiredL() = 0 ;

	protected :

			/**

			* virtual destructor

			*/

			virtual ~MServiceWidgetTimerObserver()

				{

				}

	};

/**

 *  

 *  Observer interface for handling ai foreground event	

 *  @dll servicewidgetplugin

 *  @since S60 5.0

 */

class MServiceWidgetEventObserver

	{

	public:

	        /**

	         * Handler for timer ai foreground event 

	         */  

	        virtual void HandleServiceEventL(const TDesC& aPublisherId, const TDesC8& aEvent,TDesC& aInstId ) = 0 ;

	protected :

			/**

			* virtual destructor

			*/

			virtual ~MServiceWidgetEventObserver()

				{

				}	

	};

#endif  // MSERVICEWIDGETOBSERVERS_H

// End of File