//
// This file is part of the Marble Virtual Globe.
//
// This program is free software licensed under the GNU LGPL. You can
// find a copy of this license in LICENSE.txt in the top directory of
// the source code.
//
// Copyright 2009      Andrew Manson <g.real.ate@gmail.com>
// Copyright (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
//

#include "GeoTagWriter.h"

#include "GeoWriter.h"

#include <QDebug>

namespace Marble
{

GeoTagWriter::GeoTagWriter()
{
}

GeoTagWriter::~GeoTagWriter()
{
}

bool GeoTagWriter::writeElement( const GeoNode *object,
                                 GeoWriter &writer) const
{
    return writer.writeElement( object );
}

void GeoTagWriter::registerWriter(const QualifiedName& name,
                                  const GeoTagWriter* writer )
{
    TagHash* tagHash = tagWriterHash();

    if ( tagHash->contains( name ) ) {
        qWarning() << "Warning: The tag" << name << "is already registered. Often this indicates that multiple versions of the marblewidget library are loaded at the same time. This will likely lead to problems. Please check your installation, especially internal Marble plugins and external applications that install Marble plugins.";
    }
    Q_ASSERT( !tagHash->contains( name ) );
    tagHash->insert( name, writer );
    Q_ASSERT( tagHash->contains( name ) );
}

void GeoTagWriter::unregisterWriter(const GeoTagWriter::QualifiedName &qName)
{
    auto hash = tagWriterHash();
    Q_ASSERT(hash->contains(qName));
    delete hash->value(qName);
    hash->remove(qName);
    Q_ASSERT(!hash->contains(qName));
}

GeoTagWriter::TagHash* GeoTagWriter::tagWriterHash()
{
    static TagHash s_tagWriterHash;
    return &s_tagWriterHash;
}

const GeoTagWriter* GeoTagWriter::recognizes( const QualifiedName &qname )
{
    TagHash* hash = tagWriterHash();

    if( !hash->contains( qname ) ) {
        return 0;
    }

    return hash->value( qname );
}

}
