/*

* 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 "fmoperationremove.h"

#include "fmcommon.h"

#include "fmoperationbase.h"

#include "fmdrivedetailstype.h"

#include <QDir>

#include <QFileInfo>

#include <QStringList>

#include <QStack>

FmOperationRemove::FmOperationRemove( QObject *parent, QStringList pathList ) :

        FmOperationBase( parent, FmOperationService::EOperationTypeRemove ),

        mPathList( pathList ), mStop( 0 ), mTotalCount( 0 ),

        mErrString( 0 ), mRemovedCount( 0 ), mTotalSteps( 100 ), mCurrentStep( 0 )

{

}

FmOperationRemove::~FmOperationRemove()

{

}

QStringList FmOperationRemove::pathList()

{

    return mPathList;

}

int FmOperationRemove::start( volatile bool *isStopped, QString *errString )

{

    mStop = isStopped;

    mErrString = errString;

    mTotalCount   = 0;

    mRemovedCount  = 0;

    mCurrentStep = 0;

    if( mPathList.empty() ) {

        return FmErrWrongParam;

    }

    emit notifyPreparing( true );

    quint64 totalSize= 0; 

    int numofFolders = 0;

    int numofFiles      = 0;

    int ret = FmFolderDetails::queryDetailOfContentList( mPathList, numofFolders, 

        numofFiles, totalSize, mStop, true );

    if( ret != FmErrNone ) {

        return ret;

    }

    mTotalCount = numofFolders + numofFiles;

    emit notifyStart( true, mTotalSteps );

    foreach( const QString& srcPath, mPathList ) {

        int ret = remove( srcPath );

        if( ret != FmErrNone ) {

            return ret;

        }

    }

    return FmErrNone;

}

int FmOperationRemove::remove( const QString &fileName )

{

    if( *mStop ) {

        return FmErrCancel;

    }

    int ret = FmErrNone;

    QFileInfo fi( fileName );

    if (fi.isFile()) {

        if( !QFile::remove( fileName ) ) {

            *mErrString = fileName;

            ret = FmErrCannotRemove;

        }

        IncreaseProgressOnce();

    } else if (fi.isDir()) {

       ret = recursiveRemoveDir( fileName );

    } else {

        qWarning( "Things other than file and directory are not copied" );

        ret = FmErrIsNotFileOrFolder;

    }

    return ret;

}

int FmOperationRemove::recursiveRemoveDir( const QString &pathName )

{

    QFileInfo fi( pathName );

    if (!fi.exists() || !fi.isDir())

        return FmErrSrcPathDoNotExist;

    QStack<QDir> dirs;

    dirs.push( QDir( pathName ) );

    while (!dirs.isEmpty()) {

        QFileInfoList infoList = dirs.top().entryInfoList( QDir::NoDotAndDotDot | QDir::AllEntries | QDir::Hidden | QDir::System );

        if (infoList.size() == 0) {

            QDir dirToRemove( dirs.pop() );

            if ( !dirToRemove.rmdir( dirToRemove.absolutePath() ) ) {

                *mErrString = dirToRemove.absolutePath();

                return FmErrCannotRemove;

            }

            IncreaseProgressOnce();

        } else {

            QList<QDir> dirList;

            for (QFileInfoList::Iterator it = infoList.begin(); it != infoList.end(); ++it) {

                if( *mStop ) {

                    return FmErrCancel;

                }

                if (it->isDir()) {

                    dirList.push_front( QDir( it->absoluteFilePath() ) );

                } else {

                    if ( !QFile::remove( it->absoluteFilePath() ) ) {

                        *mErrString = it->absoluteFilePath();

                        return FmErrCannotRemove;

                    }

                    IncreaseProgressOnce();

                }

            }

            foreach( const QDir& dir, dirList ) {

                dirs.push( dir );

            }

        }

    }

    return FmErrNone;

}

void FmOperationRemove::IncreaseProgressOnce()

{

    mRemovedCount++;

    int step = ( mRemovedCount * 100 ) / mTotalCount;

    if( step > mCurrentStep ) {

        mCurrentStep = step;

        emit notifyProgress( mCurrentStep );

    }

}