/*

* Copyright (c) 2007-2009 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:  Definitions needed for one "stream" of CDunTransporter

*

*/

#ifndef C_CDUNUPSTREAM_H

#define C_CDUNUPSTREAM_H

#include "DunTransUtils.h"

#include "DunStream.h"

#include "DunAtCmdHandler.h"

#include "DunDataPusher.h"

class MDunCmdModeMonitor;

/**

 *  Class used for storing data related to activity monitoring

 *

 *  @lib dunutils.lib

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( TDunActivityData )

    {

public:

    /**

     * Callback to call when notification via MDunActivityManager to be made

     * Not own.

     */

    MDunActivityManager* iActivityCallback;

    /**

     * Flag for data read activity's MDunActivityManager callback

     * This flag is needed to prevent multiple notifications of same activity

     */

    TBool iDataRead;

    /**

     * Used as a flag for the first notification of read activity

     * This flag is needed to keep MDunActivityManager notifications in sync

     * (inactivity notification done only if activity notification done first)

     */

    TBool iNotified;

    };

/**

 *  Class used for storing data related to AT command parsing

 *

 *  @lib dunutils.lib

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( TDunParseData )

    {

public:

    /**

     * Flag for command mode notifier's MDunCmdModeMonitor callback

     * This flag is needed to mark command mode start/end for parse start/end

     */

    TBool iDataMode;

    /**

     * Flag to indicate whether AT parsing is needed or not

     */

    TBool iParseNeeded;

    /**

     * Flag to be set when AT command handling starts

     */

    TBool iHandling;

    /**

     * AT Command handler. Used if iAtParseNeeded is ETrue

     */

    CDunAtCmdHandler* iAtCmdHandler;

    };

/**

 *  Accessor class for AT command handling related functionality

 *

 *  @lib dunutils.lib

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( MDunAtCmdHandler )

    {

public:

    /**

     * Starts URC message handling

     * This is an accessor for CDunDownstream's StartStream()

     *

     * @since S60 5.0

     * @return Symbian error code on error, KErrNone otherwise

     */

    virtual TInt StartUrc() = 0;

    /**

     * Stops AT command handling downstream related activity (also URC)

     * This is an accessor for CDunDownstream's Stop()

     *

     * @since S60 3.2

     * @return None

     */

    virtual TInt StopAtCmdHandling() = 0;

    };

/**

 *  Class for data transmission of one "stream" from local media to network

 *

 *  @lib dunutils.lib

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( CDunUpstream ) : public CDunStream,

                                    public MDunAtCmdHandler,

                                    public MDunCmdModeMonitor,

                                    public MDunAtCmdStatusReporter

    {

public:

    /**

     * Two-phased constructor.

     * @param aUtility Pointer to common utility class

     * @return Instance of self

     */

	static CDunUpstream* NewL( MDunTransporterUtilityAux* aUtility );

    /**

    * Destructor.

    */

    virtual ~CDunUpstream();

    /**

     * Resets data to initial values

     *

     * @since S60 3.2

     * @return None

     */

    void ResetData();

    /**

     * Sets activity callback for this stream

     *

     * @since S60 3.2

     * @param aActivityCallback Pointer to activity callback

     * @return KErrGeneral if callback null, KErrNone otherwise

     */

    TInt SetActivityCallback( MDunActivityManager* aActivityCallback );

    /**

     * Initializes this stream for AT command notifications

     *

     * @since S60 5.0

     * @param aStreamCallback Pointer to stream callback

     * @param aConnectionName Connection identifier name

     * @param aCallbackUp Upstream callback to call when command mode starts or

     *                    ends

     * @param aCallbackDown Downstream callback to call when command mode starts

     *                    or ends

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt InitializeForAtParsing( MDunStreamManipulator* aStreamCallback,

                                 const TDesC8* aConnectionName,

                                 MDunCmdModeMonitor* aCallbackUp,

                                 MDunCmdModeMonitor* aCallbackDown );

    /**

     * Starts upstream by issuing read request

     *

     * @since S60 3.2

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt StartStream();

    /**

     * Stops transfer for read & write endpoints

     *

     * @since S60 3.2

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt Stop();

    /**

     * Data transmission state (if read completed)

     *

     * @since S60 3.2

     * @return ETrue if data successfully read, EFalse otherwise

     */

    TBool DataReadStatus();

private:

    CDunUpstream( MDunTransporterUtilityAux* aUtility );

    void ConstructL();

    /**

     * Initializes this class

     *

     * @since S60 3.2

     * @return None

     */

    void Initialize();

    /**

     * Issues transfer request for this stream

     *

     * @since S60 3.2

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt IssueRequest();

    /**

     * Processes data that was read

     *

     * @since S60 5.0

     * @return ETrue if request to be reissued, EFalse otherwise

     */

    TBool ProcessReadData();

    /**

     * Manages activity in a channel

     *

     * @since S60 3.2

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt ManageChannelActivity();

// from base class CActive

    /**

     * From CActive.

     * Gets called when endpoint data read/write complete

     *

     * @since S60 3.2

     * @return None

     */

    void RunL();

    /**

     * From CActive.

     * Gets called on cancel

     *

     * @since S60 3.2

     * @return None

     */

    void DoCancel();

// from base class MDunAtCmdStatusReporter

    /**

     * Notifies about AT command handling start

     *

     * @since S60 5.0

     * @return None

     */

    void NotifyAtCmdHandlingStart();

    /**

     * Notifies about AT command handling end

     *

     * @since S60 5.0

     * @param aEndIndex Index to the start of next command

     * @return None

     */

    void NotifyAtCmdHandlingEnd( TInt aStartIndex );

// from base class MDunAtCmdHandler

    /**

     * Starts URC message handling

     * This is an accessor for CDunDownstream's StartStream()

     *

     * @since S60 5.0

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt StartUrc();

    /**

     * Stops AT command handling downstream related activity (also URC)

     * This is an accessor for CDunDownstream's Stop()

     *

     * @since S60 3.2

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt StopAtCmdHandling();

// from base class MDunCmdModeMonitor

    /**

     * Notifies about command mode start

     *

     * @since S60 5.0

     * @return None

     */

    void NotifyCommandModeStart();

    /**

     * Notifies about command mode end

     *

     * @since S60 5.0

     * @return None

     */

    void NotifyCommandModeEnd();

private:  // data

    /**

     * Pointer to common utility class

     * Not own.

     */

    MDunTransporterUtilityAux* iUtility;

    /**

     * Data related to activity monitoring

     */

    TDunActivityData iActivityData;

    /**

     * Data related to AT command parsing

     */

    TDunParseData iParseData;

    };

#endif  // C_CDUNUPSTREAM_H