Lidarr/src/NzbDrone.Core/MediaFiles/MediaFileExtensions.cs

using System;
using System.Collections.Generic;
using NzbDrone.Core.Qualities;

namespace NzbDrone.Core.MediaFiles
{
    public static class MediaFileExtensions
    {
        private static Dictionary<string, Quality> _fileExtensions;

        static MediaFileExtensions()
        {
            _fileExtensions = new Dictionary<string, Quality>(StringComparer.OrdinalIgnoreCase)
            {
                { ".mp2", Quality.Unknown },
                { ".mp3", Quality.Unknown },
                { ".m4a", Quality.Unknown },
                { ".m4b", Quality.Unknown },
                { ".m4p", Quality.Unknown },
                { ".ogg", Quality.Unknown },
                { ".oga", Quality.Unknown },
                { ".opus", Quality.Unknown },
                { ".wma", Quality.WMA },
                { ".wav", Quality.WAV },
                { ".wv", Quality.WAVPACK },
                { ".flac", Quality.FLAC },
                { ".ape", Quality.APE },
                { ".aif", Quality.Unknown },
                { ".aiff", Quality.Unknown },
                { ".aifc", Quality.Unknown },
                { ".cue", Quality.Unknown }
            };
        }

        public static HashSet<string> Extensions => new HashSet<string>(_fileExtensions.Keys, StringComparer.OrdinalIgnoreCase);

        public static Quality GetQualityForExtension(string extension)
        {
            if (_fileExtensions.ContainsKey(extension))
            {
                return _fileExtensions[extension];
            }

            return Quality.Unknown;
        }
    }
}