/*  Merge/Factory.h
 *
 *  Copyright (C) 2016  Jim Evins <evins@snaught.com>
 *
 *  This file is part of gLabels-qt.
 *
 *  gLabels-qt 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  gLabels-qt 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 gLabels-qt.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef merge_Factory_h
#define merge_Factory_h

#include <QCoreApplication>
#include <QStringList>
#include <QMap>


namespace merge
{
	class Merge; // Forward reference
	

	///
	/// Factory
	///
	class Factory
	{
		Q_DECLARE_TR_FUNCTIONS(Factory)
	

		/////////////////////////////////
		// Source Type
		/////////////////////////////////
	public:
		enum SourceType { NONE, FIXED, FILE };
		
		
		/////////////////////////////////
		// Life Cycle
		/////////////////////////////////
	protected:
		Factory();


		/////////////////////////////////
		// Static methods
		/////////////////////////////////
	public:
		static void init();
	
		static Merge* createMerge( const QString& id );

		static QStringList nameList();
		static QString idToName( const QString& id );
		static QString nameToId( const QString& name );
		static SourceType idToType( const QString& id );
		static QString indexToId( int index );


		/////////////////////////////////
		// private methods
		/////////////////////////////////
	private:
		typedef Merge* (*CreateFct)();
	
		static void registerBackend( const QString& id,
		                             const QString& name,
		                             SourceType     type,
		                             CreateFct      create );


		/////////////////////////////////
		// private data
		/////////////////////////////////
		class BackendEntry
		{
		public:
			QString    id;
			QString    name;
			SourceType type;
			CreateFct  create;
		};
	
		static QMap<QString,BackendEntry> mBackendIdMap;
		static QMap<QString,BackendEntry> mBackendNameMap;
		
	};

}

#endif // merge_Factory_h