/*

* Copyright (c) 2007 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:  

*

*/

#ifndef ATEXTENSIONPLUGINOBSERVER_H

#define ATEXTENSIONPLUGINOBSERVER_H

#include <ecom/ecom.h>

class CATExtPluginBase;

/**

* The interface for AT Extension Plugin to interact with AG.

*/

class MATExtPluginObserver

    {

public:

    /** 

    * Call by extension plugins when there is an unsolicited result code 

    * should be sent to target headset.

    * 

    * Each AT Extension Plugin is responsible to format

    * result codes properly, e.g. in BT HFP case, the

    * format should be <cr><lf><result code><cr><lf>

    * 

    * @param aAT the unsolicited result code to be sent.

    */

    virtual TInt SendUnsolicitedResult(CATExtPluginBase& aPlugin, const TDesC8& aAT) = 0;

    /** 

    * Called by Extension Plugins to inform AG that a command

    * handling has been completed or rejected.

    *

    * @return KErrNotSupported if the AT Extension Plugin doesn’t

    *         support the command passed in CATExtPluginBase::HandleCommand();

    *         KErrNone otherwise. No other error code is allowed.

    */

    virtual void HandleCommandCompleted(CATExtPluginBase& aPlugin, TInt aErr) = 0;

    /**

    * Called by the destructor of CATExtPluginBase.

    * A concrete service provider implementation should not touch this.

    *

    * @param aATExt the reference of the service provider.

    */

    virtual void ATExtPluginClosed(CATExtPluginBase& aPlugin) = 0;

    };

#endif