/*

* 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:  AT command URC handler

*

*/

#ifndef C_CDUNATURCHANDLER_H

#define C_CDUNATURCHANDLER_H

#include <atext.h>

#include "DunDataPusher.h"

class MDunStreamManipulator;

/**

 *  Class for AT command URC handler

 *

 *  @lib dunatext.lib

 */

NONSHARABLE_CLASS( CDunAtUrcHandler ) : public CActive,

                                        public MDunCompletionReporter

    {

public:

    /**

     * Two-phased constructor.

     * @param aAtCmdExt Pointer to AT command extension

     * @param aStreamCallback Callback to stream

     * @return Instance of self

     */

	static CDunAtUrcHandler* NewL( RATExt* aAtCmdExt,

	                               MDunStreamManipulator* aStreamCallback );

    /**

     * Two-phased constructor.

     * @param aAtCmdExt Pointer to AT command extension

     * @param aStreamCallback Callback to stream

     * @return Instance of self

     */

	static CDunAtUrcHandler* NewLC( RATExt* aAtCmdExt,

	                                MDunStreamManipulator* aStreamCallback );

    /**

    * Destructor.

    */

    virtual ~CDunAtUrcHandler();

    /**

     * Resets data to initial values

     *

     * @return None

     */

    void ResetData();

    /**

     * Starts waiting for an incoming URC message

     *

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt IssueRequest();

    /**

     * Stops waiting for an incoming URC message

     *

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt Stop();

    /**

     * UID of the owning plugin

     *

     * @return UID of the owning plugin

     */

    TUid OwnerUid();

private:

    CDunAtUrcHandler( RATExt* aAtCmdExt,

                      MDunStreamManipulator* aStreamCallback );

    void ConstructL();

    /**

     * Initializes this class

     *

     * @return None

     */

    void Initialize();

// from base class CActive

    /**

     * From CActive.

     * Gets called when URC command received

     *

     * @return None

     */

    void RunL();

    /**

     * From CActive.

     * Gets called on cancel

     *

     * @return None

     */

    void DoCancel();

// 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

    /**

     * AT command extension

     * Not own.

     */

    RATExt* iAtCmdExt;

    /**

     * Callback to call when data to push

     * Not own.

     */

    MDunStreamManipulator* iStreamCallback;

    /**

     * Current state of URC message handling: active or inactive

     */

    TDunState iUrcHandleState;

    /**

     * Buffer for receiving

     */

    TBuf8<KDefaultUrcBufLength> iRecvBuffer;

    /**

     * UID of the responsible ATEXT plugin

     */

    TUid iOwnerUid;

    /**

     * Package for owner UID

     */

    TPckg<TUid> iOwnerUidPckg;

    /**

     * Flag to indicate start of receiving (for ownership marking)

     */

    TBool iStarted;

    };

#endif  // C_CDUNATURCHANDLER_H