GeneralLocalizationHelper.cs

using System.Globalization;
using System.Reflection;
using System.Resources;
 
namespace Vereinsmeisterschaften.Core.Helpers
{
    public static class GeneralLocalizationHelper
    {
        private static IEnumerable<CultureInfo> _availableCultures = null;

        private static Dictionary<string, Dictionary<string, string>> _allTranslationsCache = new Dictionary<string, Dictionary<string, string>>(StringComparer.OrdinalIgnoreCase);

        static GeneralLocalizationHelper()
        {
            Assembly mainAssembly = typeof(GeneralLocalizationHelper).Assembly;
            _availableCultures = getAvailableCultures(mainAssembly);
        }

        public static Dictionary<string, string> GetAllTranslationsForKey(ResourceManager rm, string resourceKey)
        {
            if (_allTranslationsCache.ContainsKey(resourceKey))
            {
                return _allTranslationsCache[resourceKey];
            }
 
            Dictionary<string, string> result = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase);
            string neutral = rm.GetString(resourceKey, CultureInfo.InvariantCulture);
            if (!string.IsNullOrEmpty(neutral))
            {
                result["neutral"] = neutral;
            }
 
            foreach (CultureInfo culture in _availableCultures)
            {
                try
                {
                    string value = rm.GetString(resourceKey, culture);
                    if (!string.IsNullOrEmpty(value))
                    {
                        result[culture.TwoLetterISOLanguageName] = value;
                    }
                }
                catch (MissingManifestResourceException)
                {
                    // Culture has no own resx - ignore
                }
            }
 
            _allTranslationsCache[resourceKey] = result;
            return result;
        }

        private static IEnumerable<CultureInfo> getAvailableCultures(Assembly assembly)
        {
            string baseDir = Path.GetDirectoryName(assembly.Location)!;
 
            foreach (string dir in Directory.GetDirectories(baseDir))
            {
                string name = Path.GetFileName(dir);
                CultureInfo? culture = null;
 
                try
                {
                    culture = CultureInfo.GetCultureInfo(name);
                }
                catch (CultureNotFoundException)
                {
                    // No valid culture folder
                }
 
                if (culture != null)
                {
                    string satellitePath = Path.Combine(dir, assembly.GetName().Name + ".resources.dll");
                    if (File.Exists(satellitePath))
                    {
                        yield return culture;
                    }
                }
            }
        }
    }
}