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#include <QtWidgets>

#include "xbelwriter.h"
#include "xbelreader.h"

static inline QString yesValue() { return QStringLiteral("yes"); }
static inline QString noValue() { return QStringLiteral("no"); }
static inline QString titleElement() { return QStringLiteral("title"); }

//! [0]
XbelWriter::XbelWriter(const QTreeWidget *treeWidget)
    : treeWidget(treeWidget)
{
    xml.setAutoFormatting(true);
}
//! [0]

//! [1]
bool XbelWriter::writeFile(QIODevice *device)
{
    xml.setDevice(device);

    xml.writeStartDocument();
    xml.writeDTD(QStringLiteral("<!DOCTYPE xbel>"));
    xml.writeStartElement(QStringLiteral("xbel"));
    xml.writeAttribute(XbelReader::versionAttribute(), QStringLiteral("1.0"));
    for (int i = 0; i < treeWidget->topLevelItemCount(); ++i)
        writeItem(treeWidget->topLevelItem(i));

    xml.writeEndDocument();
    return true;
}
//! [1]

//! [2]
void XbelWriter::writeItem(const QTreeWidgetItem *item)
{
    QString tagName = item->data(0, Qt::UserRole).toString();
    if (tagName == QLatin1String("folder")) {
        bool folded = !item->isExpanded();
        xml.writeStartElement(tagName);
        xml.writeAttribute(XbelReader::foldedAttribute(), folded ? yesValue() : noValue());
        xml.writeTextElement(titleElement(), item->text(0));
        for (int i = 0; i < item->childCount(); ++i)
            writeItem(item->child(i));
        xml.writeEndElement();
    } else if (tagName == QLatin1String("bookmark")) {
        xml.writeStartElement(tagName);
        if (!item->text(1).isEmpty())
            xml.writeAttribute(XbelReader::hrefAttribute(), item->text(1));
        xml.writeTextElement(titleElement(), item->text(0));
        xml.writeEndElement();
    } else if (tagName == QLatin1String("separator")) {
        xml.writeEmptyElement(tagName);
    }
}
//! [2]