/*

* 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:  WMDRM DLA Default Metering

*

*/

#ifndef C_WMDRMDLADEFAULMETERING_H

#define C_WMDRMDLADEFAULMETERING_H

#include "wmdrmdladefaulthttpmanagerobserver.h"

class CWmDrmDlaDefaultHttpPlugin;

class CWmDrmDlaUiNotifier;

class CWmDrmDlaDefaultHttpManager;

class CHTTPFormEncoder;

/**

 * WMDRM DLA Default Metering

 * Reference implementation to demonstrate how to handle metering

 * with the MS test site.

 * 

 * @lib wmdrmdladefaulthttpplugin.lib

 * @since S60 v9.1

 */

NONSHARABLE_CLASS( CWmDrmDlaDefaultMetering ) 

    : public CBase, 

      public MWmDrmDlaDefaltHttpManagerObserver

    {

public:

    static CWmDrmDlaDefaultMetering* NewL( 

                CWmDrmDlaDefaultHttpPlugin* aPlugin );

    ~CWmDrmDlaDefaultMetering();

     /**

     * Check if metering certificate is supported by this plugin

     *

     * @param aCertificate Metering certificate

     * @param aUiNotifer If certificate is supported, contains initialized UI

     *                   Notifier upon completion. Will be deleted by the

     *                   caller after the plugin has been deleted.

     * @return ETrue if certificate is supported by this plugin

     * @leave with standard Symbian error code in case of error

     */

    TBool SupportedMeteringCertificateL( const TDesC8& aCertificate, 

                                         CWmDrmDlaUiNotifier*& aUiNotifier );

    /**

     * Process metering challenge. 

     *

     * @param aMeteringChallenge Metering challenge

     * @param aUrl Url to be used in metering request

     * @param aStatus Request status, will contain error code upon completion

     * including but not limited to:

     * - KErrCommsBreak if network connection was lost during communication

     *                  with server

     * - KErrGeneral if unspecified error happened

     */

    void ProcessMeteringChallenge( const TDesC8& aMeteringChallenge, 

                                   const TDesC& aUrl, 

                                   TRequestStatus& aStatus );

    /**

     * Get metering response. 

     *

     * @param aResponse Contains metering response upon completion. 

     *                  Will be deleted by the caller.

     * @param aStatus Request status, will contain error code upon completion

     */

    void GetMeteringResponse( HBufC8*& aResponse, TRequestStatus& aStatus );

    /**

     * Inform plugin that metering finished. 

     *

     */

    void MeteringFinished();

    /*

     * Cancel metering

     */

    void CancelMetering();

    /**

     * Sets the IAP to be used in the HTTP transactions

     *

     * @param   aIapId  Internet Access Point id

     */

    void SetIapId( TInt aIapId );

private: // From MWmDrmDlaDefaltHttpManagerObserver

    TBool OnGetUsernamePasswordL( HBufC8*& aUsername, HBufC8*& aPassword );

    void OnResponseHeadersL( const RHTTPResponse& aResponse, 

                             const RHTTPHeaders& aHeaders, 

                             const RStringPool& aStringPool, 

                             TInt aHttpStatus );

    void OnResponseBodyDataL( const TPtrC8 aDataChunk );

    void OnTransactionComplete( TInt aSystemError );

private:

    CWmDrmDlaDefaultMetering( CWmDrmDlaDefaultHttpPlugin* aPlugin );

    void ConstructL();

    void CompleteClientRequest( TInt aError );

    void ProcessMeteringChallengeL( const TDesC8& aMeteringChallenge );

private: // data

    enum TMeteringState

        {

        ENotActive,

        ESendingMeteringChallenge

        };

    TMeteringState iState;

    CWmDrmDlaDefaultHttpManager* iHttpManager;

    CHTTPFormEncoder* iFormEncoder;

    TInt iHttpStatus;

    HBufC8* iMeteringResponse;

    HBufC* iMeteringServerUrl;

    //Not owned

    CWmDrmDlaDefaultHttpPlugin* iPlugin;

    TRequestStatus* iClientStatus;

    };

#endif // C_WMDRMDLADEFAULMETERING_H