feat: FixLocaleIssues

AquaMai.Mods/Fix/FixLocaleIssues.cs

@@ -0,0 +1,77 @@
+using System;
+using System.Globalization;
+using AquaMai.Config.Attributes;
+using HarmonyLib;
+using JetBrains.Annotations;
+using Manager;
+
+namespace AquaMai.Mods.Fix;
+
+// Fixes various locale issues that pop up if the game runs in a different locale than ja-JP.
+[ConfigSection(exampleHidden: true, defaultOn: true)]
+public class FixLocaleIssues
+{
+    private static readonly CultureInfo JapanCultureInfo = new CultureInfo("ja-JP");
+    [CanBeNull] private static TimeZoneInfo _tokyoStandardTime;
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(int), "Parse", typeof(string))]
+    private static bool int_Parse(ref int __result, string s)
+    {
+        __result = int.Parse(s, JapanCultureInfo);
+        return false;
+    }
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(float), "Parse", typeof(string))]
+    private static bool float_Parse(ref float __result, string s)
+    {
+        __result = float.Parse(s, JapanCultureInfo);
+        return false;
+    }
+
+    // Forces local timezone to be UTC+9, since segatools didn't patch it properly until recent versions,
+    // which doesn't actually work well with maimai.
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(DateTime), "get_Now")]
+    private static bool DateTime_get_Now(ref DateTime __result)
+    {
+        if (_tokyoStandardTime == null)
+        {
+            try
+            {
+                _tokyoStandardTime = TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time");
+            }
+            catch (Exception e) when (e is TimeZoneNotFoundException or InvalidTimeZoneException)
+            {
+                _tokyoStandardTime = TimeZoneInfo.CreateCustomTimeZone(
+                    "Tokyo Standard Time",
+                    TimeManager.JpTime,
+                    "(UTC+09:00) Osaka, Sapporo, Tokyo",
+                    "Tokyo Standard Time",
+                    "Tokyo Daylight Time",
+                    null,
+                    true);
+            }
+        }
+
+        __result = TimeZoneInfo.ConvertTimeFromUtc(DateTime.UtcNow, _tokyoStandardTime!);
+        return false;
+    }
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(DateTime), "Parse", typeof(string))]
+    private static bool DateTime_Parse(ref DateTime __result, string s)
+    {
+        __result = DateTime.Parse(s, JapanCultureInfo);
+        return false;
+    }
+
+    [HarmonyPrefix]
+    [HarmonyPatch(typeof(DateTime), "ToShortDateString")]
+    private static bool DateTime_ToShortDateString(DateTime __instance, ref string __result)
+    {
+        __result = __instance.ToString("d", JapanCultureInfo);
+        return false;
+    }
+}