Localization services for setting culture

src/App/Models/PlatformCulture.cs

@@ -0,0 +1,43 @@
+using System;
+
+namespace Bit.App.Models
+{
+    /// <summary>
+    /// Helper class for splitting locales like
+    ///   iOS: ms_MY, gsw_CH
+    ///   Android: in-ID
+    /// into parts so we can create a .NET culture (or fallback culture)
+    /// </summary>
+    public class PlatformCulture
+    {
+        public PlatformCulture(string platformCultureString)
+        {
+            if(string.IsNullOrWhiteSpace(platformCultureString))
+            {
+                throw new ArgumentException("Expected culture identifier", nameof(platformCultureString));
+            }
+
+            // .NET expects dash, not underscore
+            PlatformString = platformCultureString.Replace("_", "-");
+            var dashIndex = PlatformString.IndexOf("-", StringComparison.Ordinal);
+            if(dashIndex > 0)
+            {
+                var parts = PlatformString.Split('-');
+                LanguageCode = parts[0];
+                LocaleCode = parts[1];
+            }
+            else
+            {
+                LanguageCode = PlatformString;
+                LocaleCode = "";
+            }
+        }
+        public string PlatformString { get; private set; }
+        public string LanguageCode { get; private set; }
+        public string LocaleCode { get; private set; }
+        public override string ToString()
+        {
+            return PlatformString;
+        }
+    }
+}