metadatamanager.h

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/***************************************************************************
 *   Copyright (C) 2009-2025 by Ilya Kotov                                 *
 *   forkotov02@ya.ru                                                      *
 *                                                                         *
 *   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; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   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.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
 ***************************************************************************/

#ifndef METADATAMANAGER_H
#define METADATAMANAGER_H

#include <QDir>
#include <QCache>
#include <QImage>
#include <QStringList>
#if QT_VERSION < QT_VERSION_CHECK(5,14,0)
#  include <QMutex>
#else
#  include <QRecursiveMutex>
#endif
#include "trackinfo.h"
#include "metadatamodel.h"

class DecoderFactory;
class EngineFactory;
class InputSourceFactory;
class QmmpSettings;


class QMMP_EXPORT MetaDataManager
{
public:
    QList<TrackInfo*> createPlayList(const QString &path, TrackInfo::Parts parts = TrackInfo::AllParts, QStringList *ignoredPaths = nullptr) const;
    MetaDataModel* createMetaDataModel(const QString &url, bool readOnly) const;
    QStringList filters() const;
    QStringList nameFilters() const;
    QStringList protocols() const;
    QList<RegularExpression> regExps() const;
    bool supports(const QString &file) const;
    QImage getCover(const QString &url) const;
    QString getCoverPath(const QString &url) const;
    QString findCoverFile(const QString &fileName) const;
    void clearCoverCache();
    void prepareForAnotherThread();
    static MetaDataManager* instance();

private:
    MetaDataManager();
    ~MetaDataManager();

    static void destroy();

    struct CoverCacheItem
    {
        QString coverPath;
        QImage coverImage;
    };

    QFileInfoList findCoverFiles(QDir dir, int depth) const;
    CoverCacheItem *createCoverCacheItem(const QString &url) const;
    mutable QCache<QString, CoverCacheItem> *m_cover_cache;
    QmmpSettings *m_settings = nullptr;
#if QT_VERSION < QT_VERSION_CHECK(5,14,0)
    mutable QMutex m_mutex;
#else
    mutable QRecursiveMutex m_mutex;
#endif

    static MetaDataManager* m_instance;

};

#endif