1 files changed, 90 insertions, 0 deletions
diff --git a/src/Ryujinx.HLE/HOS/SystemState/SystemStateMgr.cs b/src/Ryujinx.HLE/HOS/SystemState/SystemStateMgr.cs
new file mode 100644
index 00000000..6627700f
--- /dev/null
+++ b/src/Ryujinx.HLE/HOS/SystemState/SystemStateMgr.cs
@@ -0,0 +1,90 @@
+using System;
+
+namespace Ryujinx.HLE.HOS.SystemState
+{
+    public class SystemStateMgr
+    {
+        internal static string[] LanguageCodes = new string[]
+        {
+            "ja",
+            "en-US",
+            "fr",
+            "de",
+            "it",
+            "es",
+            "zh-CN",
+            "ko",
+            "nl",
+            "pt",
+            "ru",
+            "zh-TW",
+            "en-GB",
+            "fr-CA",
+            "es-419",
+            "zh-Hans",
+            "zh-Hant",
+            "pt-BR"
+        };
+
+        internal long DesiredKeyboardLayout { get; private set; }
+
+        internal SystemLanguage DesiredSystemLanguage { get; private set; }
+
+        internal long DesiredLanguageCode { get; private set; }
+
+        internal uint DesiredRegionCode { get; private set; }
+
+        public TitleLanguage DesiredTitleLanguage { get; private set; }
+
+        public bool DockedMode { get; set; }
+
+        public ColorSet ThemeColor { get; set; }
+
+        public string DeviceNickName { get; set; }
+
+        public SystemStateMgr()
+        {
+            // TODO: Let user specify fields.
+            DesiredKeyboardLayout = (long)KeyboardLayout.Default;
+            DeviceNickName        = "Ryujinx's Switch";
+        }
+
+        public void SetLanguage(SystemLanguage language)
+        {
+            DesiredSystemLanguage = language;
+            DesiredLanguageCode   = GetLanguageCode((int)DesiredSystemLanguage);
+
+            DesiredTitleLanguage = language switch
+            {
+                SystemLanguage.Taiwanese or
+                SystemLanguage.TraditionalChinese => TitleLanguage.TraditionalChinese,
+                SystemLanguage.Chinese or
+                SystemLanguage.SimplifiedChinese  => TitleLanguage.SimplifiedChinese,
+                _                                 => Enum.Parse<TitleLanguage>(Enum.GetName<SystemLanguage>(language)),
+            };
+        }
+
+        public void SetRegion(RegionCode region)
+        {
+            DesiredRegionCode = (uint)region;
+        }
+
+        internal static long GetLanguageCode(int index)
+        {
+            if ((uint)index >= LanguageCodes.Length)
+            {
+                throw new ArgumentOutOfRangeException(nameof(index));
+            }
+
+            long code  = 0;
+            int  shift = 0;
+
+            foreach (char chr in LanguageCodes[index])
+            {
+                code |= (long)(byte)chr << shift++ * 8;
+            }
+
+            return code;
+        }
+    }
+}
+\ No newline at end of file