--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wvuing/IMPSConnectionUI/ServiceInc/MCnUiClientStatusHandler.h	Thu Dec 17 08:41:52 2009 +0200
@@ -0,0 +1,182 @@
+/*
+* Copyright (c) 2004 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:  Client status handler.
+*
+*/
+
+#ifndef __MCNUICLIENTSTATUSHANDLER_H
+#define __MCNUICLIENTSTATUSHANDLER_H
+
+//  INCLUDES
+#include <E32Base.h>
+#include <impspresenceconnectionuiconstsng.h>
+
+
+//FORWARD DECLARATION
+class MCnUiClientStatusObserver;
+class MCnUiClientStatusHandler;
+
+/**
+ * Factory method for client status
+ * handler construction.
+ *
+ * Global factory method to create concrete
+ * client status handler.
+ *
+ * @since 2.1
+ * @return New MCnUiClientStatusHandler instance.
+ * Leaves created object on CleanupStack.
+ */
+GLREF_D MCnUiClientStatusHandler* CreateClientStatusHandlerLC();
+
+
+
+// CLASS DECLARATION
+/**
+ * Abstract interface to handle client login
+ * status.
+ *
+ * @since 2.1
+ */
+NONSHARABLE_CLASS( MCnUiClientStatusHandler )
+    {
+public: // Client status related functions
+
+
+    /**
+     * Checks is there any client marked as
+     * logged in.
+     *
+     * @since 2.1
+     * @return ETrue if there is atleast
+     * one known client logged in.
+     * Else EFalse.
+     */
+    virtual TBool AnyClientLoggedIn() = 0;
+
+
+    /**
+     * Checks is the given client marked as
+     * logged in.
+     *
+     * @since 2.1
+     * @param aClient The client to check.
+     * @return ETrue if the client is logged in.
+     * Else EFalse.
+     */
+    virtual TBool ClientLoggedIn( TIMPSConnectionClient aClient ) = 0;
+
+
+    /**
+     * Sets the client as logged in.
+     *
+     * @since 2.1
+     * @param aClient The client to mark in.
+     */
+    virtual void SetClientLoggedInL( TIMPSConnectionClient aClient ) = 0;
+
+
+    /**
+     * Clear all logged in flags.
+     *
+     * @since 2.1
+     */
+    virtual void SetNoClientsLoggedInL() = 0;
+
+
+    /**
+     * Removes the client from loged in.
+     *
+     * @since 2.1
+     * @param aClient The client to take out of logged in ones.
+     */
+    virtual void SetClientLoggedOutL( TIMPSConnectionClient aClient ) = 0;
+
+
+    /**
+     * Requests notifications from certain client login
+     * staus changes. There can be just one this kind
+     * of reqest active at time per one MCnUiClientStatusHandler.
+     *
+     * @since 2.1
+     * @param aObserver The observer to notify. Must be a valid object.
+     * @param aClientToNotify The client for which login status to notify.
+     */
+    virtual void NotifyClientLoginStatusChangesL( MCnUiClientStatusObserver* aObserver,
+                                                  TIMPSConnectionClient aClientToNotify ) = 0;
+
+    /**
+     * Cancels any previously issued
+     * client status notify.
+     *
+     * @since 2.1
+     */
+    virtual void CancelClientStatusNotify() = 0;
+
+
+public:  //Destructor
+
+    /**
+     * Virtual inline destructor.
+     *
+     * Allows destruction using this
+     * interface
+     *
+     * Cancels any previously issued
+     * client status notify.
+     */
+    virtual ~MCnUiClientStatusHandler() {};
+    };
+
+
+
+/**
+ * Observer interface to report client
+ * status changes.
+ *
+ * @since 2.1
+ */
+NONSHARABLE_CLASS( MCnUiClientStatusObserver )
+    {
+public:  // New observation methods
+
+    /**
+     * Method called to handle client
+     * status changes.
+     *
+     * @since 2.1
+     * @param aRequestedClient The client for which the
+     * notifiaction was requested.
+     * @param aClientNowLoggedIn ETrue if the client is
+     * now logged in. EFalse if the client is now logged out.
+     */
+    virtual void HandleClientLoginStatusChange( TIMPSConnectionClient aRequestedClient,
+                                                TBool aClientNowLoggedIn ) = 0;
+
+protected:  //Destructor
+
+    /**
+     * Virtual inline destructor.
+     *
+     * Concrete observer can't be destroyed
+     * using this interface.
+     */
+    virtual ~MCnUiClientStatusObserver() {};
+    };
+
+
+#endif      //  __MCNUICLIENTSTATUSHANDLER_H
+
+//  End of File
+