/* 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 :

 *

 */

#ifndef CUSDCOMMANDHANDLER_H

#define CUSDCOMMANDHANDLER_H

#include <e32base.h>

#include <etelmm.h>

#include <mmretrieve.h>

#include <gsmuelem.h>

#include "atcmdsyncbase.h"

class CUSSDSendMessageImpl;

class CUSSDReadMessageImpl;

/**

 *  Class for accessing plugin information and common functionality

 */

NONSHARABLE_CLASS( MUSSDCallback )

    {

public:

    /**

     * Callback method for handling received USSD messages

     * @param aError - the result code from the read operation

     */

    virtual void HandleReadMessageComplete(TInt aError) = 0;

    /**

      * Callback method for handling sent USSD messages

      * @param aError - the result code from the send operation

      */

    virtual void HandleSendMessageComplete(TInt aError) = 0;

    };

/**

 *  Class for handling USSD requests

 */

NONSHARABLE_CLASS( CCUSDCommandHandler ) : public CATCmdSyncBase,

                                           public MUSSDCallback

{

public:

    static CCUSDCommandHandler* NewL(MATMiscCmdPlugin* aCallback, TAtCommandParser& aATCmdParser, RMobilePhone& aPhone);

    ~CCUSDCommandHandler();

private: // methods from MUSSDCallback

    virtual void HandleSendMessageComplete(TInt aError);

    virtual void HandleReadMessageComplete(TInt aError);

private: // methods from CATCmdAsyncBase    

    virtual void HandleCommand( const TDesC8& aCmd, RBuf8& aReply, TBool aReplyNeeded );

    virtual void HandleCommandCancel();

private:

    CCUSDCommandHandler(MATMiscCmdPlugin* aCallback, TAtCommandParser& aATCmdParser, RMobilePhone& aPhone);

    void ConstructL();

    TInt ParseCUSDCmd();

    void CCUSDCommandHandler::FindFirstCarriageReturnL( 

         const TDesC& aBuffer ,

         TUint& aSkipChars , 

         TUint& aStartBit );

    TInt Pack(const TDesC8& aIn, TDes8& aOut);

    TInt ElementSizeInBits(TSmsDataCodingScheme::TSmsAlphabet aAlphabet) const;

    TInt PackedOctetsRequired( TInt aNumUDUnits ) const;

    TBool IsDcsValid( const TUint8 aDcs ) const;

    void FormatUSSDReceivedData();

private:

    TBool iSendCommandSent;

    RBuf8 iReply;

    RMobileUssdMessaging iUssdMessaging;

    CUSSDSendMessageImpl* iUSSDSender;

    RMobileUssdMessaging::TMobileUssdAttributesV1 iSendAttributes;

    RBuf8 iUSSDCommand;

    CUSSDReadMessageImpl* iUSSDReader;

    RMobileUssdMessaging::TGsmUssdMessageData iReceivedData;

    TInt iDisplayRetMessage;

    RMobileUssdMessaging::TMobileUssdAttributesV1 iReceiveAttributes;

    };

#endif // CUSDCOMMANDHANDLER_H