/*
  This file is part of the KTextTemplate library

  SPDX-FileCopyrightText: 2009, 2010 Stephen Kelly <steveire@gmail.com>

  SPDX-License-Identifier: LGPL-2.1-or-later

*/

#ifndef TAGLIBRARYINTERFACE_H
#define TAGLIBRARYINTERFACE_H

#include "outputstream.h"

#include <QHash>
#include <QtPlugin>

namespace KTextTemplate
{
class AbstractNodeFactory;
class Filter;

/*!
  \class KTextTemplate::TagLibraryInterface
  \inheaderfile KTextTemplate/TagLibraryInterface
  \inmodule KTextTemplate

  \brief The TagLibraryInterface returns available tags and filters from
  libraries.

  This interface must be implemented in tag and filter libraries.

  The implementation will usually be very simple.

  \code
    class MyTagLibrary : public QObject, public TagLibraryInterface
    {
      Q_OBJECT
      Q_INTERFACES( KTextTemplate::TagLibraryInterface )
    public:
      MyTagLibrary( QObject *parent = {} )
          : QObject( parent ) {
      }

      QHash<QString, AbstractNodeFactory*>
      nodeFactories(const QString &name = {}) {
        Q_UNUSED( name );
        QHash<QString, AbstractNodeFactory*> nodeFactories;
        nodeFactories.insert( "mytag1", new MyTag1() );
        nodeFactories.insert( "mytag2", new MyTag2() );
        return nodeFactories;
      }

      QHash<QString, Filter*> filters( const QString &name = {} ) {
        Q_UNUSED( name );

        QHash<QString, Filter*> filters;

        filters.insert( "myfilter1", new MyFilter1() );
        filters.insert( "myfilter2", new MyFilter2() );

        return filters;
      }
    };
  \endcode
*/
class TagLibraryInterface
{
public:
    virtual ~TagLibraryInterface()
    {
    }

    /*!
      Returns the AbstractNodeFactory implementations available in this library.
    */
    virtual QHash<QString, AbstractNodeFactory *> nodeFactories(const QString &name = {})
    {
        Q_UNUSED(name);
        static const QHash<QString, AbstractNodeFactory *> h;
        return h;
    };

    /*!
      Returns the Filter implementations available in this library.
    */
    virtual QHash<QString, Filter *> filters(const QString &name = {})
    {
        Q_UNUSED(name);
        static const QHash<QString, Filter *> h;
        return h;
    };
};
}

Q_DECLARE_INTERFACE(KTextTemplate::TagLibraryInterface, "org.kde.KTextTemplate.TagLibraryInterface/1.0")

#endif