diff -r 3104fc151679 -r 9a48e301e94b uiservicetab/vimpstengine/inc/mvimpstengineimsubservice.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uiservicetab/vimpstengine/inc/mvimpstengineimsubservice.h	Wed Sep 01 12:33:36 2010 +0100
@@ -0,0 +1,127 @@
+/*
+* 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:  M-Class that capsulates IM sub service API's
+*
+*/
+
+
+#ifndef MVIMPSTENGINEIMSUBSERVICE_H
+#define MVIMPSTENGINEIMSUBSERVICE_H
+
+//  INCLUDES
+#include <e32base.h>
+#include "tvimpstenums.h"
+#include "mvimpstenginesubservice.h"
+#include <imcachedefs.h>
+
+//FORWARD DECLARATION
+class MVIMPSTEngineIMSubServiceEventObserver;
+
+//CLASS DECLARATION
+/**
+ *  
+ *  This class list the M-Class for IM subservices
+ *
+ *  @lib vimpstengine.lib
+ *  @since S60 5.0
+ */
+//Class declaration
+class MVIMPSTEngineIMSubService: public MVIMPSTEngineSubService
+	{
+	
+	public:
+	
+		/**
+         * Casts MVIMPSTEngineIMSubService to this interface.
+         *
+         * @precond aSubService.Type() == TVIMPSTEnums::EIM
+         *          Panic(EPanicTypeMismatch)
+         *          is raised if the precondition does not hold.
+         * @param aSubService    Base Class .
+         * @return Casted inteface for the IM SubService
+         */
+        IMPORT_C static MVIMPSTEngineIMSubService& Cast(
+                MVIMPSTEngineSubService& aSubService);
+
+        
+        /**
+         * Casts constMVIMPSTEngineIMSubService to this interface.
+         *
+         * @precond aSubService.Type() == TVIMPSTEnums::EIM
+         *          Panic(EPanicTypeMismatch)
+         *          is raised if the precondition does not hold.
+         * @param aSubService    Base Class .
+         * @return Casted inteface for the IM SubService
+         */        
+        IMPORT_C static const MVIMPSTEngineIMSubService& Cast(
+                const MVIMPSTEngineSubService& aSubService);
+	
+	
+		/**
+		* RegisterChatObserver
+		* The observers that have implemented MVIMPSTEngineIMSubServiceEventObserver can use this API
+		* to register themselves to receive IM SubService (Conversation) related events
+		* @param aObserver - Object that implements the observer class MVIMPSTEngineIMSubServiceEventObserver that 
+		* needs to be added.
+		*/
+	  	virtual void RegisterChatObserver(MVIMPSTEngineIMSubServiceEventObserver* aObserver) = 0;
+	  	
+		/**
+		* UnRegisterChatObserver
+		* The observers that have implemented MVIMPSTEngineIMSubServiceEventObserver can use this API
+		* to unregister themselves from IM SubService (Conversation) related events
+		* @param aObserver - Object that implements the observer class MVIMPSTEngineIMSubServiceEventObserver that
+		* needs to be removed.
+		*/
+	  	virtual void UnRegisterChatObserver(MVIMPSTEngineIMSubServiceEventObserver* aObserver) = 0;
+	  	
+		/**
+		* GetUnreadCountL
+		* API used to retreive the Unread Msg Count for a Buddy
+		* @param aBuddyId, id of the conversation party. 
+		*/
+	  	virtual TInt GetUnreadCountL(const TDesC& aBuddyId) = 0;
+	
+	
+		/**
+         * check if already conversation opened
+         * @param aBuddyId, the selected user id with whom conversation is started
+         * @return TBool ETrue if already exist else EFlase.
+         */
+        virtual TBool IsConversationExistL(const TDesC& aBuddyId) const = 0;
+        
+        /**
+        * Closes conversation with the selected user        
+        * @param aBuddyId, id of the conversation party.           
+        */
+        virtual void CloseConversationL( const TDesC& aBuddyId ) = 0;
+	    						   
+        /**
+        * get all conversation with the selected service id        
+        * @param aBuddyId, id of the conversation party.           
+        */
+      
+        virtual RArray<SIMCacheChatItem> GetOpenChatListL() = 0 ;
+        
+	   /**
+		* Destructor
+		*/		
+		virtual ~MVIMPSTEngineIMSubService() 
+		{}
+		
+	};
+
+#endif //MVIMPSTENGINEIMSUBSERVICE_H
+
+