Lidarr/src/NzbDrone.Core/Parser/IsoLanguages.cs

using System.Collections.Generic;
using System.Linq;

namespace NzbDrone.Core.Parser
{
    public static class IsoLanguages
    {
        private static readonly HashSet<IsoLanguage> All = new HashSet<IsoLanguage>
                                                           {
                                                               new IsoLanguage("en", "eng"),
                                                               new IsoLanguage("fr", "fra"),
                                                               new IsoLanguage("es", "spa"),
                                                               new IsoLanguage("de", "deu"),
                                                               new IsoLanguage("it", "ita"),
                                                               new IsoLanguage("da", "dan"),
                                                               new IsoLanguage("nl", "nld"),
                                                               new IsoLanguage("ja", "jpn"),

//                                                             new IsoLanguage("", ""),
//                                                             new IsoLanguage("", ""),
                                                               new IsoLanguage("ru", "rus"),
                                                               new IsoLanguage("pl", "pol"),
                                                               new IsoLanguage("vi", "vie"),
                                                               new IsoLanguage("sv", "swe"),
                                                               new IsoLanguage("no", "nor"),
                                                               new IsoLanguage("fi", "fin"),
                                                               new IsoLanguage("tr", "tur"),
                                                               new IsoLanguage("pt", "por"),

//                                                             new IsoLanguage("nl", "nld"),
                                                               new IsoLanguage("el", "ell"),
                                                               new IsoLanguage("ko", "kor"),
                                                               new IsoLanguage("hu", "hun")
                                                           };

        public static IsoLanguage Find(string isoCode)
        {
            if (isoCode.Length == 2)
            {
                //Lookup ISO639-1 code
                return All.SingleOrDefault(l => l.TwoLetterCode == isoCode);
            }
            else if (isoCode.Length == 3)
            {
                //Lookup ISO639-2T code
                return All.SingleOrDefault(l => l.ThreeLetterCode == isoCode);
            }

            return null;
        }
    }
}