/*

* Copyright (c) 2006-2006 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:  Stores element data and writes it to stream

*

*/

#include <connect/sbdefs.h>

#include "cbsbackupobserver.h"

// ======== MEMBER FUNCTIONS ========

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

// CBSBackupObserver::NewL

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

//

CBSBackupObserver* CBSBackupObserver::NewL()

    {

    CBSBackupObserver* self = NewLC();

    CleanupStack::Pop();

    return self;

    }

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

// CBSBackupObserver::NewLC

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

//

CBSBackupObserver* CBSBackupObserver::NewLC()

    {

    CBSBackupObserver* self = new (ELeave) CBSBackupObserver();

    CleanupStack::PushL( self );

    self->ConstructL();

    return self;

    }

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

// CBSBackupObserver::ConstructL

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

//

void CBSBackupObserver::ConstructL()

    {

    CActiveScheduler::Add( this );

    iProperty.Attach( KUidSystemCategory, conn::KUidBackupRestoreKey );

    iLatestState = BackupStateL();

    Subscribe();

    }

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

// CBSBackupObserver::CBSBackupObserver

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

//

CBSBackupObserver::CBSBackupObserver() :

    CActive( EPriorityStandard )

    {

    }

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

// CBSBackupObserver::~CBSBackupObserver

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

//

CBSBackupObserver::~CBSBackupObserver()

    {

    Cancel();

    iObservers.Close();

    }

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

// CBSBackupObserver::RunL

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

//

void CBSBackupObserver::RunL()

    {

    MBSBackupObserver::TBackupState newState = BackupStateL();

    if( newState != iLatestState )

        {

        // state changed

        iLatestState = newState;

        NotifyObserversL( iLatestState );

        }

    Subscribe();

    }

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

// CBSBackupObserver::DoCancel

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

//

void CBSBackupObserver::DoCancel()

    {

    iProperty.Cancel();

    }

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

// CBSBackupObserver::RunError

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

//

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

    {

    return KErrNone;

    }

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

// CBSBackupObserver::RegisterObserver

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

//

TInt CBSBackupObserver::RegisterObserver( MBSBackupObserver* aObserver )

    {

    TInt err = iObservers.InsertInAddressOrder( aObserver );

    if( err == KErrAlreadyExists )

        {

        // ignore duplicate registration

        err = KErrNone;

        }

    // if backup is already active -> notify

    if( iLatestState == MBSBackupObserver::EBackupActive )

        {

        TRAP_IGNORE( aObserver->HandleBackupStateL( iLatestState ) );

        }

    return err;

    }

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

// CBSBackupObserver::UnregisterObserver

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

//

void CBSBackupObserver::UnregisterObserver( MBSBackupObserver* aObserver )

    {

    TInt index = iObservers.FindInAddressOrder( aObserver );

    if( index != KErrNotFound )

        {

        iObservers.Remove( index );

        }

    }

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

// CBSBackupObserver::Subscribe

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

//

void CBSBackupObserver::Subscribe()

    {

    if( IsActive() )

        {

        // already active

        return;

        }

    iStatus = KRequestPending;

    iProperty.Subscribe( iStatus );

    SetActive();    

    }

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

// CBSBackupObserver::NotifyObservers

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

//

void CBSBackupObserver::NotifyObserversL( MBSBackupObserver::TBackupState aState )

    {

    TInt count = iObservers.Count();

    for( TInt i = 0; i < count; i++ )

        {

        TRAP_IGNORE( iObservers[i]->HandleBackupStateL( aState ) );

        }

    }

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

// CBSBackupObserver::BackupState

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

//

MBSBackupObserver::TBackupState CBSBackupObserver::BackupStateL()

    {

    TInt value = 0;

    User::LeaveIfError( iProperty.Get( value ) );

    if( value == 0 || 

        value == ( conn::EBURNormal | conn::ENoBackup ) )

        {

        // backup or restore is not active at the moment

        return MBSBackupObserver::EBackupNotActive;

        }

    return MBSBackupObserver::EBackupActive;

    }

// End of file