/*

* 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:  Contains logic for watching certain disk's space

*

*/

#include "irqsystemeventhandler.h"

#include "irqsystemeventhandler_p.h"

#include "irdiskspaceobserver.h"

#include "iralarmobserver.h"

#ifdef USER_DEFINED_DISKSPACE 

#include <QFile>

#include <QTextStream>

#include <QStringList> 

#endif

IRQSystemEventHandlerPrivate::IRQSystemEventHandlerPrivate(IRQSystemEventHandler *aSystemEventHandler) : q_ptr(aSystemEventHandler),

                              mAlarmOn(false),mDefaultLevel(3*1024*1024),mAlarmObserver(NULL), mDiskSpaceObserver(NULL)

{ 

}

IRQSystemEventHandlerPrivate::~IRQSystemEventHandlerPrivate()

{

    cancel();

    delete mDiskSpaceObserver;

    delete mAlarmObserver;   

}

bool IRQSystemEventHandlerPrivate::init()

{ 

#ifdef USER_DEFINED_DISKSPACE

    getDiskSpaceCriticalLevel(mDefaultLevel);

#endif  

    TRAPD(err, initializeL());      

    if( KErrNone == err )

    {

        return true;

    }

    else

    {

        mDiskSpaceObserver = NULL;

        mAlarmObserver = NULL;

    }

    return false;

}

qint64 IRQSystemEventHandlerPrivate::diskCriticalLevel() const

{

    if(NULL != mDiskSpaceObserver)

    {

        return (qint64)(mDiskSpaceObserver->CriticalLevel());

    }

    else

    {

        return -1;

    }

}

void IRQSystemEventHandlerPrivate::initializeL()

{

    mAlarmObserver = CIRAlarmObserver::NewLC(this);    

    mDiskSpaceObserver = CIRDiskSpaceObserver::NewL(this);

    CleanupStack::Pop(mAlarmObserver);

}

void IRQSystemEventHandlerPrivate::cancel()

{

    if( mAlarmObserver )

    {

        mAlarmObserver->Cancel();

    }

    if( mDiskSpaceObserver )

    {

        mDiskSpaceObserver->Cancel();

    }

}

void IRQSystemEventHandlerPrivate::start()

{

    if( mAlarmObserver )

    {

        mAlarmObserver->Start();        

    }

    if( mDiskSpaceObserver )

    {

        mDiskSpaceObserver->Start((TInt64)mDefaultLevel);            

    }    

}

bool IRQSystemEventHandlerPrivate::isBelowCriticalLevel(const qint64 aCriticalLevel)

{

    if( 0 == aCriticalLevel )

    {

        return mDiskSpaceObserver->IsBelowCriticalLevel((TInt64)mDefaultLevel );

    }

    return mDiskSpaceObserver->IsBelowCriticalLevel((TInt64)aCriticalLevel );

}

#ifdef USER_DEFINED_DISKSPACE

void IRQSystemEventHandlerPrivate::getDiskSpaceCriticalLevel(qint64 & aLevel)

{

    QFile file("C:\\data\\QTIRConfigure.txt");

    if(file.open(QIODevice::ReadOnly)) 

    {

        QTextStream stream( &file );

        QString line;

        QStringList parameter;

        while (!stream.atEnd())

        {

            line = stream.readLine();

            parameter = line.split("=");

            if (parameter.count() == 2)

            {

                if (parameter.first() == "diskSpaceCriticalLevel")

                {

                    QString level = parameter.last();

                    aLevel = level.toLongLong();

                    break;

                }

            }

        }

    }

    file.close();

}

#endif

void IRQSystemEventHandlerPrivate::alarmStarted()

{

    if( !mAlarmOn )

    {

        emit q_ptr->alarmStarted();

        mAlarmOn = true;

    }

}

void IRQSystemEventHandlerPrivate::alarmStopped()

{

    if( mAlarmOn )

    {

        emit q_ptr->alarmStopped();

        mAlarmOn = false;

    }

}

void IRQSystemEventHandlerPrivate::notifyLowDiskSpace(qint64 aCriticalLevel)

{

    emit q_ptr->diskSpaceLowNotification(aCriticalLevel);

}