/*

 * Hedgewars, a free turn based strategy game

 * Copyright (c) 2006-2007 Igor Ulyanov <iulyanov@gmail.com>

 * Copyright (c) 2007-2012 Andrey Korotaev <unC0Rr@gmail.com>

 *

 * 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; version 2 of the License

 *

 * 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

 */

/**

 * @file

 * @brief DataManager class definition

 */

#ifndef HEDGEWARS_DATAMANAGER_H

#define HEDGEWARS_DATAMANAGER_H

#include <QDir>

#include <QFile>

#include <QStringList>

#include "ThemeModel.h"

class QDir;

class QFile;

class QStringList;

class ThemeModel;

/**

 * @brief Offers access to the data files of hedgewars.

 *

 * @see <a href="http://en.wikipedia.org/wiki/Singleton_pattern">singleton pattern</a>

 *

 * @author sheepluva

 * @since 0.9.17

 */

class DataManager: public QObject

{

        Q_OBJECT

    public:

        /**

         * @brief Returns reference to the <i>singleton</i> instance of this class.

         *

         * @see <a href="http://en.wikipedia.org/wiki/Singleton_pattern">singleton pattern</a>

         *

         * @return reference to the instance.

         */

        static DataManager & instance();

        /**

         * @brief Returns a sorted list of data directory entries.

         *

         * @param subDirectory sub-directory to search.

         * @param filters filters for entry type.

         * @param nameFilters filters by name patterns.

         * @return a sorted list of matches in the subDirectory of data directory.

         */

        QStringList entryList(const QString & subDirectory,

                              QDir::Filters filters = QDir::NoFilter,

                              const QStringList & nameFilters = QStringList("*")

                             ) const;

        /**

         * @brief Returns the path for the desires data file.

         *

         * Use this method if you want to read an existing data file.

         *

         * @param relativeDataFilePath relative path of the data file.

         * @return real path to the file.

         */

        QString findFileForRead(const QString & relativeDataFilePath) const;

        /**

         * @brief Returns the path for the data file that is to be written.

         *

         * Use this method if you want to create or write into a data file.

         *

         * @param relativeDataFilePath relative path of data file write path.

         * @return destination of path data file.

         */

        QString findFileForWrite(const QString & relativeDataFilePath) const;

        /**

         * @brief Returns pointer to a model for the available themes.

         *

         * The model is kept up to date automatically.

         *

         */

        ThemeModel * themeModel();

    public slots:

        /**

         * @brief Reloads data from storage.

         */

        void reload();

    signals:

        /**

         * @brief This signal is emitted after the data has been updated.

         */

        void updated();

    private:

        /**

         * @brief Class constructor of the <i>singleton</i>.

         *

         * Not to be used from outside the class,

         * use the static {@link DataManager::instance()} instead.

         *

         * @see <a href="http://en.wikipedia.org/wiki/Singleton_pattern">singleton pattern</a>

         */

        DataManager();

        QDir * m_defaultData; ///< directory of the installed data

        QDir * m_userData;    ///< directory of custom data in the user's directory

};

#endif // HEDGEWARS_DATAMANAGER_H