/*

* 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 "fmutils.h"

#include <QDir>

#include <QFileInfo>

#include <QStringList>

#include <QStack>

/* \fn  void driveSpaceChanged()

 * This signal is emitted when copy or move is completed, and used to update the drive size.

 */

/*

 * Constructs a remove operation with

 * \a parent parent

 * \a pathList the file or path to be removed.

 */

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

        FmOperationBase( parent, FmOperationService::EOperationTypeRemove ),        

        mPathList( pathList ), 

        mStop( 0 ),

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

{

    connect( this, SIGNAL( driveSpaceChanged() ),

                parent, SLOT( on_operation_driveSpaceChanged() ) );

}

/*

 * Destructs the operation.

 */

FmOperationRemove::~FmOperationRemove()

{

}

/*

 * Returns the path list

 */

QStringList FmOperationRemove::pathList()

{

    return mPathList;

}

/*

 * Starts the operation.

 * \a isStopped flag the outside stop operation

 */

void FmOperationRemove::start( volatile bool *isStopped )

{

    mStop = isStopped;

    mTotalCount   = 0;

    mRemovedCount  = 0;

    mCurrentStep = 0;

    if( mPathList.empty() ) {

        emit notifyError( FmErrWrongParam, mErrString );    

        return ;

    }

    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 ) {

        emit notifyError( ret, mErrString );

        return;

    }

    mTotalCount = numofFolders + numofFiles;

    emit notifyStart( true, mTotalSteps );

    foreach( const QString& srcPath, mPathList ) {

        int ret = remove( srcPath );

        if( ret != FmErrNone ) {

            emit notifyError( ret, mErrString );

            // refresh drive space no care if cancel, error or finished.

            // as filemanger cannot notify drive space changed

            // do not refresh path as QFileSystemModel will do auto-refresh

            emit driveSpaceChanged();

            return;

        }

    }

    emit notifyFinish();

    emit driveSpaceChanged();

}

/*

 * Removes the file or dir with name \a fileName

 */

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()) {

       if( FmUtils::isDefaultFolder( fileName ) ){

           ret = FmErrRemoveDefaultFolder;

       }

       else{

           ret = recursiveRemoveDir( fileName );

       }

    } else {

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

        ret = FmErrIsNotFileOrFolder;

    }

    return ret;

}

/*

 * Remove the dir with name \a pathName

 */

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;

}

/*

 * Increase the progress bar

 */

void FmOperationRemove::IncreaseProgressOnce()

{

    if( mTotalCount <= 0 )

        return;

    mRemovedCount++;

    int step = ( mRemovedCount * 100 ) / mTotalCount;

    if( step > mCurrentStep ) {

        mCurrentStep = step;

        emit notifyProgress( mCurrentStep );

    }

}