Reworked LocalizationManager to load data async

Emby.Server.Implementations/Localization/TextLocalizer.cs

@@ -1,63 +0,0 @@
-using System;
-using System.Globalization;
-using System.Linq;
-using System.Text;
-using System.Text.RegularExpressions;
-
-namespace Emby.Server.Implementations.Localization
-{
-    public class TextLocalizer : ITextLocalizer
-    {
-        public string RemoveDiacritics(string text)
-        {
-            if (text == null)
-            {
-                throw new ArgumentNullException(nameof(text));
-            }
-
-            var chars = Normalize(text, NormalizationForm.FormD)
-                .Where(ch => CharUnicodeInfo.GetUnicodeCategory(ch) != UnicodeCategory.NonSpacingMark);
-
-            return Normalize(string.Concat(chars), NormalizationForm.FormC);
-        }
-
-        private static string Normalize(string text, NormalizationForm form, bool stripStringOnFailure = true)
-        {
-            if (stripStringOnFailure)
-            {
-                try
-                {
-                    return text.Normalize(form);
-                }
-                catch (ArgumentException)
-                {
-                    // will throw if input contains invalid unicode chars
-                    // https://mnaoumov.wordpress.com/2014/06/14/stripping-invalid-characters-from-utf-16-strings/
-                    text = StripInvalidUnicodeCharacters(text);
-                    return Normalize(text, form, false);
-                }
-            }
-
-            try
-            {
-                return text.Normalize(form);
-            }
-            catch (ArgumentException)
-            {
-                // if it still fails, return the original text
-                return text;
-            }
-        }
-
-        private static string StripInvalidUnicodeCharacters(string str)
-        {
-            var invalidCharactersRegex = new Regex("([\ud800-\udbff](?![\udc00-\udfff]))|((?<![\ud800-\udbff])[\udc00-\udfff])");
-            return invalidCharactersRegex.Replace(str, "");
-        }
-
-        public string NormalizeFormKD(string text)
-        {
-            return text.Normalize(NormalizationForm.FormKD);
-        }
-    }
-}