inifilesupport.cpp

/***************************************************************************
 *   Copyright (C) 2008 by Tomassino Ferrauto                              *
 *   t_ferrauto@yahoo.it                                                   *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include "private/inifilesupport.h"
#include "configurationparameters.h"
#include <QtDebug>
#include <QFile>
#include <QRegExp>

namespace farsa {

IniFileLoaderSaver::IniFileLoaderSaver() :
    ParametersFileLoaderSaver()
{
}

IniFileLoaderSaver::~IniFileLoaderSaver()
{
}

bool IniFileLoaderSaver::saveParameters(QTextStream &stream, const ConfigurationParameters& configParams)
{
    //--- write recursevly all groups starting from the root
    return writeGroupToStream( "", stream, configParams );
}

bool IniFileLoaderSaver::writeGroupToStream(QString groupPath, QTextStream &outstream, const ConfigurationParameters& configParams) {
    //--- write parameters first
    QStringList paramList = configParams.getParametersList( groupPath );
    foreach( QString param, paramList ) {
        QString value = configParams.getValue( groupPath + ConfigurationParameters::GroupSeparator() + param );
        if ( ! value.isEmpty() ) {
            outstream << param << " = " << value << "\n";
        }
    }
    //--- add an extra empty row for dividing sub-groups
    outstream << "\n";
    //--- and then all subgroups recursively
    QStringList groupList = configParams.getGroupsList( groupPath );
    foreach( QString group, groupList ) {
        //--- is there the responsability to write the group header
        //--- because in this way we can avoid to write the [ROOT] for root node
        QString subgroup = groupPath + ConfigurationParameters::GroupSeparator() + group;
        outstream << "[" << subgroup.section('/',1) << "]" << "\n";
        writeGroupToStream( subgroup, outstream, configParams );
    }
    return true;
}

bool IniFileLoaderSaver::loadParameters(QTextStream &stream, ConfigurationParameters& configParams)
{
    // Regular expressions for comment, group and parameters
    QRegExp comment("([#;]+.*)");
    QRegExp group("^\\[(.*)\\]$");
    QRegExp param("([^=]+)=(.+)");

    QString groupPath = "";
    while(!stream.atEnd()) {
        // Reading a line and removing comments
        QString line = stream.readLine().remove(comment).simplified();

        // Checking whether the line is a group
        group.indexIn(line);
        QString newgroup = group.cap(1).simplified();
        if (!newgroup.isNull()) {
            // A new group, adding to root
            groupPath = newgroup;
            configParams.createGroup( groupPath );
            continue;
        }

        // If we get here we should have a property of groupPath
        param.indexIn(line);
        QString name = param.cap(1).simplified();
        QString value = param.cap(2).simplified();
        if ((!name.isNull()) && (!value.isNull())) {
            configParams.createParameter( groupPath, name );
            configParams.setValue( groupPath + ConfigurationParameters::GroupSeparator() + name, value );
        }
    }
    return true;
}

} // end namespace farsa