/*

* Copyright (c) 2010 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:  Echoer for AT commands

*

*/

#ifndef C_CDUNATCMDECHOER_H

#define C_CDUNATCMDECHOER_H

#include "DunDataPusher.h"

class MDunStreamManipulator;

/**

 *  Notification interface class for text mode

 *

 *  @lib dunatext.lib

 *  @since TB9.2

 */

NONSHARABLE_CLASS( MDunAtCmdEchoer )

    {

public:

    /**

     * Notifies about completed echo in text mode

     *

     * @since TB9.2

     * @return None

     */

    virtual void NotifyEchoComplete() = 0;

    };

/**

 *  Class for AT command echoer

 *

 *  @lib dunatext.lib

 *  @since TB9.2

 */

NONSHARABLE_CLASS( CDunAtCmdEchoer ) : public CBase,

                                       public MDunCompletionReporter

    {

public:

    /**

     * Two-phased constructor.

     * @param aStreamCallback Callback to stream

     * @return Instance of self

     */

    static CDunAtCmdEchoer* NewL( MDunStreamManipulator* aStreamCallback );

    /**

    * Destructor.

    */

    virtual ~CDunAtCmdEchoer();

    /**

     * Resets data to initial values

     *

     * @since TB9.2

     * @return None

     */

    void ResetData();

    /**

     * Sends a character to be echoed

     *

     * @since TB9.2

     * @param aInput Input to echo

     * @param aCallback Callback to echo request completions

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt SendEchoCharacter( const TDesC8* aInput, MDunAtCmdEchoer* aCallback );

private:

    CDunAtCmdEchoer( MDunStreamManipulator* aStreamCallback );

    void ConstructL();

    /**

     * Initializes this class

     *

     * @since TB9.2

     * @return None

     */

    void Initialize();

// from base class MDunCompletionReporter

    /**

     * From MDunCompletionReporter.

     * Gets called when data push is complete

     *

     * @param aAllPushed ETrue if all in the queue were pushed, EFalse otherwise

     * @return None

     */

    void NotifyDataPushComplete( TBool aAllPushed );

private:  // data

    /**

     * Notification interface class for echo request completions

     * Not own.

     */

    MDunAtCmdEchoer* iCallback;

    /**

     * Callback to call when data to push

     * Not own.

     */

    MDunStreamManipulator* iStreamCallback;

    /**

     * Current state of echoing: active or inactive

     */

    TDunState iAtEchoState;

    };

#endif  // C_CDUNATCMDECHOER_H