add subtitle language detection

Emby.Common.Implementations/TextEncoding/NLangDetect/Utils/Messages.cs

@@ -0,0 +1,91 @@
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+using System.Reflection;
+using System.Text.RegularExpressions;
+using System.Linq;
+using System;
+
+namespace NLangDetect.Core.Utils
+{
+    public static class Messages
+    {
+        private static readonly Dictionary<string, string> _messages;
+
+        static Messages()
+        {
+            _messages = LoadMessages();
+        }
+
+        public static string getString(string key)
+        {
+            string value;
+
+            return
+              _messages.TryGetValue(key, out value)
+                ? value
+                : string.Format("!{0}!", key);
+        }
+
+        private static Dictionary<string, string> LoadMessages()
+        {
+            var manifestName = typeof(Messages).Assembly.GetManifestResourceNames().FirstOrDefault(i => i.IndexOf("messages.properties", StringComparison.Ordinal) != -1) ;
+
+            Stream messagesStream =
+              typeof(Messages).Assembly
+                .GetManifestResourceStream(manifestName);
+
+            if (messagesStream == null)
+            {
+                throw new InternalException(string.Format("Couldn't get embedded resource named '{0}'.", manifestName));
+            }
+
+            using (messagesStream)
+            using (var sr = new StreamReader(messagesStream))
+            {
+                var messages = new Dictionary<string, string>();
+
+                while (!sr.EndOfStream)
+                {
+                    string line = sr.ReadLine();
+
+                    if (string.IsNullOrEmpty(line))
+                    {
+                        continue;
+                    }
+
+                    string[] keyValue = line.Split('=');
+
+                    if (keyValue.Length != 2)
+                    {
+                        throw new InternalException(string.Format("Invalid format of the 'Messages.properties' resource. Offending line: '{0}'.", line.Trim()));
+                    }
+
+                    string key = keyValue[0];
+                    string value = UnescapeUnicodeString(keyValue[1]);
+
+                    messages.Add(key, value);
+                }
+
+                return messages;
+            }
+        }
+
+        /// <remarks>
+        /// Taken from: http://stackoverflow.com/questions/1615559/converting-unicode-strings-to-escaped-ascii-string/1615860#1615860
+        /// </remarks>
+        private static string UnescapeUnicodeString(string s)
+        {
+            if (s == null)
+            {
+                return null;
+            }
+
+            return
+              Regex.Replace(
+                s,
+                @"\\u(?<Value>[a-zA-Z0-9]{4})",
+                match => ((char)int.Parse(match.Groups["Value"].Value, NumberStyles.HexNumber)).ToString());
+        }
+    }
+}