/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include <qglobal.h>

#if defined(Q_OS_SYMBIAN)

#include <f32file.h>

#include <eikenv.h> 

#endif

#include <QString>

#include <QCoreApplication>

#include <QFileInfo>

#include <hbfindfile.h>

#include <qbasicatomic.h>

#include <QDir>

#if defined(Q_OS_SYMBIAN)

    #define PLATFORM_WITH_DRIVES

#elif defined(Q_OS_WIN32)

    #define PLATFORM_WITH_DRIVES

#else

    #undef PLATFORM_WITH_DRIVES

#endif

#ifdef Q_OS_SYMBIAN

/*!

    Convert path to Symbian version

*/

static void toSymbianPath(QString &path) {    

    int len=path.length();

    for (int i=0; i<len; i++) {

        QCharRef ref=path[i];

        if (ref == '/') {

           ref= '\\';

        }

    }

}

#endif

/*!

    @beta

    @hbcore

    \class HbFindFile

    \brief Checks from which drive a certain file is found.

    Example:

    \snippet{unittest_hbfindfile/unittest_hbfindfile.cpp,1} 

*/

/*!

    Scans drives through and adds drive information to \a str if file is found.

    \attention Cross-Platform API

    \param str is file and path beginning with "/"

    \param defaultDrive is drive letter which should be checked first. Default value is null.

    \return True if file is found. Otherwise return false.

*/

bool HbFindFile::hbFindFile(QString &str, const QChar &defaultDrive)

{

#if defined(Q_OS_SYMBIAN)

    RFs& fs = CCoeEnv::Static()->FsSession();

    TFindFile ff(fs);

    QString str2 = str;

    toSymbianPath(str2);

    TPtrC fName((ushort*)(str2.constData()),str2.length());

    QString dNameString;

    if (!defaultDrive.isNull()) {

        dNameString.append(defaultDrive);

        dNameString += QString(":");

    }    

    dNameString += QString("\\");    

    TPtrC dName((ushort*)(dNameString.constData()),dNameString.length());

    TInt err=ff.FindByDir(fName, dName);

    if (err==KErrNone) {

        TParse p;

        p.Set(ff.File(), 0,0);

        TPtrC ptrC = p.Drive();

        QString str3 = QString::fromRawData((QChar*)(ushort*)ptrC.Ptr(),ptrC.Length()); 

        str.prepend(str3);

        return true;

    }    

    else {

        return false;

    }

#elif defined(Q_OS_WIN32)

    QString file = str;

    if (!defaultDrive.isNull()) {

        file = defaultDrive + QString(":") + str;

        QFileInfo info(file);

        if (info.exists()) {

            str = file;

            return true;

        }

    }

    QString drives = availableDrives();

    for (int i = 0; i < drives.size(); i++) {

        if (drives.at(i) == defaultDrive) {

    	    continue;

        }

        file = drives.at(i) + QString(":") + str;

        QFileInfo info(file);

        if (info.exists()) {

            str = file;

            return true;

        }

    }

    return false;

#else

    Q_UNUSED(defaultDrive);

    QFileInfo info(str);

    return info.exists();

#endif   

}

#ifdef PLATFORM_WITH_DRIVES

/*!

    Helper class

*/

class AvailableDrives : public QString

{

public:

    AvailableDrives();    

};

/*!

    Search available drives

*/

AvailableDrives::AvailableDrives() {

#ifdef Q_OS_SYMBIAN    

    RFs& fs = CCoeEnv::Static()->FsSession();

    TDriveList driveList;

    fs.DriveList(driveList);

    if ( driveList.Size() == 0 ) {

        return;

    }

    TChar driveLetter;

    // add first C and then Y..A and then Z.

    TInt driveNumber;

    if (driveList[EDriveC]) {        

        driveNumber = EDriveC;

        fs.DriveToChar(driveNumber, driveLetter);

        QChar cC = static_cast<QChar>(driveLetter);    

        this->append(cC);

    }

    for (driveNumber = EDriveY; driveNumber >= EDriveA; --driveNumber) {

        if (driveNumber == EDriveC) {

            continue;

        } else {

            if (driveList[driveNumber]) {

                fs.DriveToChar(driveNumber, driveLetter);

                QChar c = static_cast<QChar>(driveLetter);

                this->append(c);

            }    

        }    

    }

    if (driveList[EDriveZ]) {    

        driveNumber = EDriveZ;

        fs.DriveToChar(driveNumber, driveLetter);

        QChar cZ = static_cast<QChar>(driveLetter);

        this->append(cZ);

    }  

#else // Q_OS_SYMBIAN           

     QFileInfoList fil = QDir::drives();

     for (int j=0; j< fil.length(); j++) {

         QString fp = fil.at(j).filePath();

         if ( fp.isEmpty() ) {

            return;

        }

         if ( (fp[0] != '/') && (fp[0] != '\\') ) {                

         this->append(fp[0]);

         }        

     }

#endif // Q_OS_SYMBIAN    

}

Q_GLOBAL_STATIC(AvailableDrives, gs_AvailableDrives)

#endif  // PLATFORM_WITH_DRIVES 

/*!

    \attention Cross-Platform API

    \returns Available drive(s) if platform supports (Eg. Symbian, Windows...). 

    If platform doesn't support drive(s) (Eg. Linux) then empty QString is returned. 

*/

QString HbFindFile::availableDrives()

{

#ifdef PLATFORM_WITH_DRIVES

     QString *str = gs_AvailableDrives();

     if (str) {

         return *str;         

     } else {

         return QString(); 

     }

#else // PLATFORM_WITH_DRIVES           

     return QString(); 

#endif  // PLATFORM_WITH_DRIVES 

}