/***************************************************************************
 *   Copyright (C) 2003 by Sébastien Laoût                                 *
 *   slaout@linux62.org                                                    *
 *                                                                         *
 *   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 "xmlwork.h"

#include <QtCore/QFile>
#include <QtCore/QString>
#include <QtCore/QStringList>
#include <QtXml/QDomDocument>

QDomDocument* XMLWork::openFile(const QString &name, const QString &filePath)
{
    QDomDocument *doc = new QDomDocument(name);
    QFile file(filePath);
    if (! file.open(QIODevice::ReadOnly)) {
        // QMessageBox::information(this, "Load an XML file", "Error : un-openable file");
        delete doc;
        return 0;
    }
    if (! doc->setContent(&file)) {
        // QMessageBox::information(this, "Load an XML file", "Error : malformed content");
        file.close();
        delete doc;
        return 0;
    }
    file.close();
    return doc;
}

QDomElement XMLWork::getElement(const QDomElement &startElement, const QString &elementPath)
{
    QStringList elements = elementPath.split("/");
    QDomNode n = startElement.firstChild();
    for (int i = 0; i < elements.count(); ++i) {                // For each elements
        while (! n.isNull()) {                                          // Browse their  sub elements
            QDomElement e = n.toElement();                              //  and search the good one
            if ((!e.isNull()) && e.tagName() == elements.at(i)) {      // If found
                if (i + 1 == elements.count())                          // And if it is the asked element
                    return e;                                           // Return the first corresponding
                else {                                                  // Or if it is an intermediate element
                    n = e.firstChild();                                 // Continue with the next sub element
                    break;
                }
            }
            n = n.nextSibling();
        }
    }
    return QDomElement();                                               // Not found !
}

QString XMLWork::getElementText(const QDomElement &startElement, const QString &elementPath, const QString &defaultTxt)
{
    QDomElement e = getElement(startElement, elementPath);
    if (e.isNull())
        return defaultTxt;
    else
        return e.text();
}

void XMLWork::addElement(QDomDocument &document, QDomElement &parent, const QString &name, const QString &text)
{
    QDomElement tag = document.createElement(name);
    parent.appendChild(tag);
    QDomText content = document.createTextNode(text);
    tag.appendChild(content);
}

bool XMLWork::trueOrFalse(const QString &value, bool defaultValue)
{
    if (value == "true"  || value == "1" || value == "on"  || value == "yes")
        return true;
    if (value == "false" || value == "0" || value == "off" || value == "no")
        return false;
    return defaultValue;
}

QString XMLWork::trueOrFalse(bool value)
{
    return value ? "true" : "false";
}

QString XMLWork::innerXml(QDomElement &element)
{
    QString inner;
    for (QDomNode n = element.firstChild(); !n.isNull(); n = n.nextSibling())
        if (n.isCharacterData())
            inner += n.toCharacterData().data();
        else if (n.isElement()) {
            QDomElement e = n.toElement();
            inner += "<" + e.tagName() + ">" + innerXml(e) + "</" + e.tagName() + ">";
        }
    return inner;
}

void XMLWork::setupXmlStream(QXmlStreamWriter& stream, QString startElement)
{
    stream.setAutoFormatting(true);
    stream.setAutoFormattingIndent(1);
    stream.writeStartDocument();
    stream.writeDTD("<!DOCTYPE " + startElement + ">");
    stream.writeStartElement(startElement);
}
