/*
  Copyright (C) 2004, 2005 Benjamin Meyer <ben at meyerhome dot net>

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111-1307, USA.
*/

#include <audiocdencoder.h>
#include <klibloader.h>
#include <kdebug.h>
#include <qdir.h>
#include <qregexp.h>
#include <kstandarddirs.h>

/**
 * Attempt to load a plugin and see if it has the symbol create_audiocd_encoders.
 * @param libFileName file to try to load.
 * @returns pointer to the symbol or NULL
 */
void *loadPlugin(const QString &libFileName)
{
#ifdef DEBUG
    kdDebug(7117) << "Trying to load library. File: \"" << libFileName.latin1() << "\"." << endl;
#endif
    KLibLoader *loader = KLibLoader::self();
    if (!loader)
        return NULL;
#ifdef DEBUG
    kdDebug(7117) << "We have a loader. File:  \"" << libFileName.latin1() << "\"." << endl;
#endif
    KLibrary *lib = loader->library(libFileName.latin1());
    if (!lib)
        return NULL;
#ifdef DEBUG
    kdDebug(7117) << "We have a library. File: \"" << libFileName.latin1() << "\"." << endl;
#endif
    void *cplugin = lib->symbol("create_audiocd_encoders");
    if (!cplugin)
        return NULL;
#ifdef DEBUG
    kdDebug(7117) << "We have a plugin. File:  \"" << libFileName.latin1() << "\"." << endl;
#endif
    return cplugin;
}

/**
 * There might be a "better" way of doing this, but I don't know it,
 * but I do know that this does work. :)  Feel free to improve the loading system,
 * there isn't much code anyway.
 */
void AudioCDEncoder::findAllPlugins(KIO::SlaveBase *slave, QPtrList<AudioCDEncoder> &encoders){
    QString foundEncoders;

    KStandardDirs standardDirs;
    QStringList dirs = standardDirs.findDirs("module", "");
    for (QStringList::Iterator it = dirs.begin(); it != dirs.end(); ++it) {
        QDir dir(*it);
        if (!dir.exists()) {
            kdDebug(7117) << "Directory given by KStandardDirs: " << dir.path() << " doesn't exists!" << endl;
            continue;
        }
        dir.setFilter(QDir::Files | QDir::Hidden);
  
        QStringList list = dir.entryList( "libaudiocd_encoder_*.so");
        kdDebug() << "list " << list << endl;
        for (QStringList::ConstIterator it2 = list.begin(); it2 != list.end(); ++it2) 
        {
            QString fileName = *it2;
            kdDebug() << fileName << endl;
            if (foundEncoders.contains(fileName)) {
                kdDebug(7117) << "Warning, encoder has been found twice!" << endl; 
                continue;
            }
            foundEncoders.append(fileName);
            fileName = fileName.mid(0, fileName.find('.'));
            void *function = loadPlugin(fileName);
            if(function){
                void (*functionPointer)(KIO::SlaveBase *, QPtrList<AudioCDEncoder> &) = (void (*)(KIO::SlaveBase *slave, QPtrList<AudioCDEncoder> &encoders)) function;
                functionPointer(slave, encoders);
            }
        } 
    }
}