/*

* Copyright (c) 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:

*

*/

#include <e32property.h>

#include <QFile>

#include "hsrecoverymanager.h"

const TInt KPSCategoryUid(0x20022F36);

const TInt KPSCrashCountKey(1);

const int KCrashCountThreshold(3);

const int KResetCrashCountInterval(60000);

/*!

    \class HsRecoveryManager

    \ingroup group_hsapplication

    \brief Used during homescreen startup for recovering from possible crash situations.

*/

/*!

    Constructs a new recovery manager with the given \a parent item.

*/

HsRecoveryManager::HsRecoveryManager(QObject *parent)

  : QObject(parent)

{    

    mTimer.setInterval(KResetCrashCountInterval);

    mTimer.setSingleShot(true);

    connect(&mTimer, SIGNAL(timeout()), SLOT(resetCrashCount()));

}

/*!

    Destructor.

*/

HsRecoveryManager::~HsRecoveryManager()

{

}

/*!

    Executes this recovery manager. If crash count exceeds the

    threshold, the ROM configuration is selected. Otherwise,

    the existing one is used.

*/

void HsRecoveryManager::execute()

{

    int count = crashCount();    

    if (KCrashCountThreshold <= count) {

        restoreRomDatabase();

        resetCrashCount();

        return;

    }

    if (0 < count) {

        mTimer.start();

    }

}

/*!

    Restores the ROM database to c: drive.

*/

void HsRecoveryManager::restoreRomDatabase()

{

    // If exists, remove the database from c:

    QFile file("c:/private/20022f35/homescreen.db");

    if (file.exists()) {        

        file.remove();

    }          

    // Copy the rom database to c: and set permissions.

    file.setFileName("z:/private/20022f35/homescreen.db");     

    if (!file.copy("c:/private/20022f35/homescreen.db")) {

        qDebug() << "copying of homescreen.db to c: drive failed";

    } else {

        file.setFileName("c:/private/20022f35/homescreen.db");

        if (!file.setPermissions(QFile::ReadOwner | QFile::WriteOwner)) {

            qDebug() << "setPermissions of homescreen.db failed";

        }

    }

}

/*!

    Resets the crash count to zero.

*/

void HsRecoveryManager::resetCrashCount()

{

    RProperty::Set(TUid::Uid(KPSCategoryUid), KPSCrashCountKey, 0); 

}

/*!

    Returns the current crash count.

*/

int HsRecoveryManager::crashCount()

{

    TInt count = 0;

    RProperty::Get(TUid::Uid(KPSCategoryUid), KPSCrashCountKey, count);    

    return count;

}