metaio.h

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#ifndef METAIO_H_
#define METAIO_H_
 
// POSIX C headers
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
 
// QT
#include <QString>
 
// libmythmetadata
#include "musicmetadata.h"
 
static constexpr const char* MYTH_MUSICBRAINZ_ALBUMARTIST_UUID { "89ad4ac3-39f7-470e-963a-56509c546377" };
 
class META_PUBLIC MetaIO
{
  public:
    MetaIO();
    virtual ~MetaIO(void) = default;
 
    virtual bool write(const QString &filename, MusicMetadata* mdata) = 0;
 
    virtual bool writeVolatileMetadata([[maybe_unused]] const QString & filename,
                                       [[maybe_unused]] MusicMetadata* mdata)
    {
        return false;
    }
 
    virtual MusicMetadata* read(const QString &filename) = 0;
 
    virtual bool supportsEmbeddedImages(void)
    {
        return false;
    }
 
    virtual AlbumArtList getAlbumArtList([[maybe_unused]] const QString &filename)
    {
        return {};
    }
 
    virtual bool writeAlbumArt([[maybe_unused]] const QString &filename,
                               [[maybe_unused]] const AlbumArtImage *albumart)
    {
        return false;
    }
 
    virtual bool removeAlbumArt([[maybe_unused]] const QString &filename,
                                [[maybe_unused]] const AlbumArtImage *albumart)
    {
        return false;
    }
 
    virtual bool changeImageType([[maybe_unused]] const QString &filename,
                                 [[maybe_unused]] const AlbumArtImage *albumart,
                                 [[maybe_unused]] ImageType newType)
    {
        return false;
    }
 
    virtual QImage *getAlbumArt([[maybe_unused]] const QString &filename,
                                [[maybe_unused]] ImageType type)
    {
        return nullptr;
    }
 
    void readFromFilename(const QString &filename, QString &artist,
                          QString &album, QString &title, QString &genre,
                          int &tracknum);
 
    MusicMetadata* readFromFilename(const QString &filename, bool blnLength = false);
 
    void readFromFilename(MusicMetadata *metadata);
 
    virtual bool TagExists([[maybe_unused]] const QString &filename)
    { 
        return false;
    }
 
    static MetaIO *createTagger(const QString &filename);
 
    static MusicMetadata *readMetadata(const QString &filename);
 
    static MusicMetadata *getMetadata(const QString &filename);
 
    static const QString kValidFileExtensions;
 
  protected:
    void saveTimeStamps(void);
    void restoreTimeStamps(void);
 
    virtual std::chrono::milliseconds getTrackLength(const QString &filename) = 0;
 
    QString m_filename;
    QString m_filenameFormat;
 
    struct stat m_fileinfo {};
};
 
#endif