/*

* Copyright (c) 2006-2007 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:  Monitors signal changes on network side and reports changes

*

*/

#ifndef C_CDUNSIGNALNOTIFY_H

#define C_CDUNSIGNALNOTIFY_H

#include "DunTransUtils.h"

#include "DunAtCmdHandler.h"

/**

 *  Class for monitoring line status and reporting changes

 *

 *  @lib dunutils.lib

 *  @since S60 v3.2

 */

NONSHARABLE_CLASS( CDunSignalNotify ) : public CActive

    {

public:

    /**

     * Two-phased constructor.

     * @param aUtility Pointer to common utility class

     * @return Instance of self

     */

	static CDunSignalNotify* NewL( MDunTransporterUtilityAux* aUtility );

    /**

    * Destructor.

    */

    virtual ~CDunSignalNotify();

    /**

     * Resets data to initial values

     *

     * @since S60 3.2

     * @return None

     */

    void ResetData();

    /**

     * Adds callback for line status change controlling

     * The callback will be called when line status change is detected in

     * endpoint

     *

     * @since S60 3.2

     * @param aCallback Callback to call when line status changes

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt AddCallback( MDunConnMon* aCallback );

    /**

     * Adds callback for endpoint readiness

     * The callback will be called when the endpoint is ready or not ready

     *

     * @since S60 5.0

     * @param aERCallback Callback to call when writes can/can't be done

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt AddEndpointReadyCallback( MDunEndpointReady* aERCallback );

    /**

     * Sets media to use for this endpoint monitor (network side)

     *

     * @since S60 3.2

     * @param aComm RComm pointer to use as the endpoint

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt SetMedia( RComm* aComm );

    /**

     * Issues request to start monitoring the endpoint for line status change

     *

     * @since S60 3.2

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt IssueRequest();

    /**

     * Stops monitoring the endpoint for line status change

     *

     * @since S60 3.2

     * @return Symbian error code on error, KErrNone otherwise

     */

    TInt Stop();

private:

    CDunSignalNotify( MDunTransporterUtilityAux* aUtility );

    void ConstructL();

    /**

     * Initializes this class

     *

     * @since S60 3.2

     * @return None

     */

    void Initialize();

    /**

     * Manages signal changes

     *

     * @since S60 3.2

     * @return None

     */

    void ManageSignalChange();

    /**

     * Reports signal change

     *

     * @since S60 3.2

     * @param aSetMask Set the handshaking lines in the mask

     * @param aClearMask Clear the handshaking lines in the mask.

     * @return None

     */

    void ReportSignalChange( TUint aSetMask, TUint aClearMask );

    /**

     * Reports endpoint ready or not ready

     *

     * @since S60 5.0

     * @param aReady ETrue if endpoint ready, EFalse otherwise

     * @return None

     */

    void ReportEndpointReady( TBool aReady );

// from base class CActive

    /*

     * From CActive.

     * Gets called when line status changes

     *

     * @since S60 3.2

     * @return None

     */

    void RunL();

    /**

     * From CActive.

     * Gets called on cancel

     *

     * @since S60 3.2

     * @return None

     */

    void DoCancel();

private:  // data

    /**

     * Callback(s) to call when notification(s) via MDunConnMon to be made

     * Normally contains only one callback

     */

    RPointerArray<MDunConnMon> iCallbacks;

    /**

     * Callback(s) to call when notification(s) via MDunEndpointReady to be made

     * Normally contains only one callback for upstream

     */

    RPointerArray<MDunEndpointReady> iERCallbacks;

    /**

     * Pointer to common utility class

     * Not own.

     */

    MDunTransporterUtilityAux* iUtility;

    /**

     * Current state of signal monitoring: active or inactive

     */

    TDunState iSignalNotifyState;

    /**

     * Signals to listen with RComm::NotifySignalChange()

     */

    TUint iListenSignals;

    /**

     * Signals set when RComm::NotifySignalChange() request completes

     */

    TUint iSignals;

    /**

     * RComm object of network side

     * Not own.

     */

    RComm* iNetwork;

    };

#endif  // C_CDUNSIGNALNOTIFY_H