/*

* Copyright (c) 2010 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:  Home screen Backup/Restore observer.

*

*/

#include "hsdatabase.h"

#include "hsbackuprestoreobserver.h"

#ifdef Q_OS_SYMBIAN

#include <connect/sbdefs.h>

#include <e32property.h>

#include <XQSettingsManager>

#include "hsbackuprestoreactivecallback.h"

#include "hsbackuprestoreobserver_p.h"

/*!

    Constructs a new observer with the given \a parent object.

*/

HsBackupRestoreObserverPrivate::HsBackupRestoreObserverPrivate(HsBackupRestoreObserver *observer,

                                                               QObject *parent):

    QObject(parent),

    mQ(observer),

    mCallBack(NULL),

    mActiveBackupClient(NULL),

    mLastType(conn::EBURNormal)

{

    XQPublishAndSubscribeSettingsKey backupRestoreKey(KUidSystemCategory.iUid, KUidBackupRestoreKey);

    XQSettingsManager *sm = new XQSettingsManager(this);

    connect(sm,SIGNAL(valueChanged(XQSettingsKey, const QVariant &)), this,

			          SLOT(handleKeyChange(XQSettingsKey, const QVariant &)));

    sm->startMonitoring(backupRestoreKey);

}

/*!

    Destructor.

*/

HsBackupRestoreObserverPrivate::~HsBackupRestoreObserverPrivate()

{   

    disconnect(sender(), SIGNAL(valueChanged(XQSettingsKey, const QVariant &)),

			   this, SLOT(handleKeyChange(XQSettingsKey, const QVariant&)));

    delete mCallBack;

    delete mActiveBackupClient;

}

/*!

    Informs active backup client, when Home screen is ready for backup/restore.

*/

void HsBackupRestoreObserverPrivate::readyForBUR()

{

	mActiveBackupClient->ConfirmReadyForBURL( KErrNone );

}

/*!

    \fn HsBackupRestoreObserverPrivate::handleKeyChange()

    Handles the key change. Creates active backup client and 

    informs client about backup/restore state change.

*/

void HsBackupRestoreObserverPrivate::handleKeyChange(XQSettingsKey key, const QVariant &value)

{    

    conn::TBURPartType type = static_cast< conn::TBURPartType >

        ( value.toInt() & conn::KBURPartTypeMask );

	// Test if the device is going into backup or restore mode, and we are

    // required to participate.

    if ( key.key() == KUidBackupRestoreKey && 

         (( type == conn::EBURBackupFull || type == conn::EBURRestoreFull ) ||

         ( type == conn::EBURBackupPartial || type == conn::EBURRestorePartial )) )

    {

        if ( !mCallBack )

        {

            mCallBack = CHsBURActiveCallback::NewL(mQ);

        }

        if ( !mActiveBackupClient )

        {

            mActiveBackupClient = conn::CActiveBackupClient::NewL( mCallBack );

            if ( ( type == conn::EBURBackupPartial || 

                   type == conn::EBURRestorePartial ) &&

                 !mActiveBackupClient->DoesPartialBURAffectMeL() )

            {

                delete mCallBack;

                mCallBack = NULL;

                delete mActiveBackupClient;

                mActiveBackupClient = NULL;

                return;

            }           

            mQ->backupRestoreStarted();            

        }        

    }

    else

    {

        if ( key.key() == KUidBackupRestoreKey && type == conn::EBURNormal )

        {

            if ( (mLastType == conn::EBURBackupFull || mLastType == conn::EBURBackupPartial) ||

            	 (mLastType == conn::EBURRestorePartial || mLastType == conn::EBURRestoreFull) )

            {                

                mQ->backupRestoreComplited();

            }         

            // delete once back to normal.

            delete mCallBack;

            mCallBack = NULL;

            delete mActiveBackupClient;

            mActiveBackupClient = NULL;            

        }

    }

    mLastType = type;

}

#endif //Q_OS_SYMBIAN

/*!

    Singleton. 

*/

HsBackupRestoreObserver *HsBackupRestoreObserver::instance()

{

    if (!mInstance) {

        mInstance.reset(new HsBackupRestoreObserver);

    }

    return mInstance.data();

}

/*!

    Constructs a new observer with the given \a parent object.

*/

HsBackupRestoreObserver::HsBackupRestoreObserver(QObject *parent)

 : QObject(parent),

   mBUROngoing(false)

{

#ifdef Q_OS_SYMBIAN

    mD = new HsBackupRestoreObserverPrivate(this);

#endif //Q_OS_SYMBIAN

}

/*!

    Destructor.

*/

HsBackupRestoreObserver::~HsBackupRestoreObserver()

{

#ifdef Q_OS_SYMBIAN

    delete mD;

#endif //Q_OS_SYMBIAN

}

/*!

    Called when backup/restore is started.

*/

void HsBackupRestoreObserver::backupRestoreStarted()

{

	mBUROngoing = true;

	emit event_backupRestoreStarted();

}

/*!

    Called when backup/restore is completed.

*/

void HsBackupRestoreObserver::backupRestoreComplited()

{

	mBUROngoing = false;

	emit event_backupRestoreComplited();

}

/*!

    Called when Home screen is ready for backup/restore.

*/

void HsBackupRestoreObserver::readyForBUR()

{

#ifdef Q_OS_SYMBIAN

    mD->readyForBUR();

#endif //Q_OS_SYMBIAN

}

/*!

    Returns true if bacup/restore is ongoing.

*/

bool HsBackupRestoreObserver::checkBUR()

{

	return mBUROngoing;

}

/*!

    Points to the observer instance.

*/

QScopedPointer<HsBackupRestoreObserver> HsBackupRestoreObserver::mInstance(0);

// End of File