/*

* 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:  Checks if wlan scan state changes and informs observer of it

*

*/

//  Include Files

#include <commdb.h>

#include <d32dbms.h>

#include <WlanCdbCols.h>

#include <wlanmgmtclient.h>

#include "cmcommsdbnotifier.h"

#include "cmscheduler.h"

#include "msdebug.h"

// Two-phased constructor.

CCmCommsDbNotifier* CCmCommsDbNotifier::NewL( CCmScheduler& aScheduler )

    {

    CCmCommsDbNotifier* self = new (ELeave) CCmCommsDbNotifier( aScheduler );

    CleanupStack::PushL( self );

    CActiveScheduler::Add( self );

    self->ConstructL();

    CleanupStack::Pop();

    return self;

}

void CCmCommsDbNotifier::ConstructL()

    {

    // open comms database

    iDb = CCommsDatabase::NewL();

    // assign notification request

    RequestNotification();

    }

// --------------------------------------------------------------------------

// CCmCommsDbNotifier::CCmCommsDbNotifier

// C++ default constructor can NOT contain any code, that

// might leave.

// --------------------------------------------------------------------------

//

CCmCommsDbNotifier::CCmCommsDbNotifier( CCmScheduler& aScheduler ) :

    CActive( CActive::EPriorityStandard )

    {

    LOG(_L("[Cm Scheduler]\t CCmCommsDbNotifier::CCmCommsDbNotifier()"));

    // Scheduler reads scan interval on construction, so we can

    // assume it's off

    // now

    iScanState = 0;

    iScheduler = &aScheduler;

    }

// Destructor

CCmCommsDbNotifier::~CCmCommsDbNotifier()

    {

    LOG(_L("[Cm Scheduler]\t CCmCommsDbNotifier::~CCmCommsDbNotifier()"));

    Cancel();

    delete iDb;

    }

// --------------------------------------------------------------------------

// CCmCommsDbNotifier::RequestNotification

// Requests database notification

// --------------------------------------------------------------------------

//

void CCmCommsDbNotifier::RequestNotification()

    {

    LOG(_L("[Cm Scheduler]\t CCmCommsDbNotifier::RequestNotification()"));

    if ( !IsActive() )

        {

        iDb->RequestNotification( iStatus );

        SetActive();

        }

    }

// --------------------------------------------------------------------------

// CCmCommsDbNotifier::DoCancel

// --------------------------------------------------------------------------

//

void CCmCommsDbNotifier::DoCancel()

    {

    // cancel possible requests

    iDb->CancelRequestNotification();

    }

// ---------------------------------------------------------------------------

// CCmCommsDbNotifier::RunL

// Called when change in database occurs

// ---------------------------------------------------------------------------

//

void CCmCommsDbNotifier::RunL()

    {

    LOG(_L("[Cm Scheduler]\t CCmCommsDbNotifier::RunL()"));

    if ( iScheduler &&

         iStatus.Int() == RDbNotifier::ECommit &&

         HasScanStateChangedL() )

        {

        iScheduler->WlanScanStateChanged( iScanState );

        }

    // Assign new request

    RequestNotification();

    }

// --------------------------------------------------------------------------

// CCmCommsDbNotifier::RunError

// Called if RunL leaves

// --------------------------------------------------------------------------

//

#ifdef _DEBUG

TInt CCmCommsDbNotifier::RunError( TInt aError )

#else // _DEBUG

TInt CCmCommsDbNotifier::RunError( TInt /*aError*/ )

#endif // _DEBUG

    {

    TRACE(Print(_L("[Cm Scheduler]\t \

    CCmCommsDbNotifier::RunError errorcode = %d"), aError));

    return KErrNone;

    }

// --------------------------------------------------------------------------

// CCmCommsDbNotifier::HasScanStateChangedL

// Checks if wlan scanning interval has been changed

// --------------------------------------------------------------------------

//

TBool CCmCommsDbNotifier::HasScanStateChangedL()

    {

    LOG(_L("[Cm Scheduler]\t CCmCommsDbNotifier::HasScanStateChangedL"));

    TBool status( EFalse );

    TUint32 scanState = WlanScanStateL();

    if ( iScanState != scanState )

        {

        // value changed

        iScanState = scanState;

        status = ETrue;

        }

    else

        {

        // value not changed

        status = EFalse;

        }

    return status;

    }

// --------------------------------------------------------------------------

// CCmCommsDbNotifier::WlanScanStateL

// Returns state of wlan scan interval setting

// --------------------------------------------------------------------------

//

TUint32 CCmCommsDbNotifier::WlanScanStateL()

    {

    TUint32 scanState( 0 );

#ifndef __WINS__

    // open wlan table

    CCommsDbTableView* view = iDb->OpenViewMatchingUintLC

        (

        TPtrC( WLAN_DEVICE_SETTINGS ),

        TPtrC( WLAN_DEVICE_SETTINGS_TYPE ), KWlanUserSettings

        );

    User::LeaveIfError( view->GotoFirstRecord() );

    // read scanning interval

    view->ReadUintL( TPtrC( WLAN_BG_SCAN_INTERVAL ),

                     scanState );

    TRACE(Print(_L("[Cm Scheduler]\t CCmCommsDbNotifier::prev: %d, \

                scan :%d"), iScanState, scanState ));

    CleanupStack::PopAndDestroy( view );

#endif

    return scanState;

    }

// End of file