public Mp3LibrarySorter(IFileSystem fileSystem, string startDirectory, IMp3TagsHierarchy mp3TagsHierarchy, IMp3FileReader mp3FileReader)
{
_fileSystem = fileSystem;
_startDirectory = startDirectory;
_mp3TagsHierarchy = mp3TagsHierarchy;
_mp3FileReader = mp3FileReader;
var files = _fileSystem.GetAllMp3Files(startDirectory);
_mp3Files = _mp3FileReader.RetrieveTagsFromMp3Files(files);
foreach (var mp3Representation in _mp3Files)
{
_mp3TagsHierarchy.AddInformation(mp3Representation);
}
}