Re-introduce patch for settings saving

src/DayZLauncher.UnixPatcher/Patches/LauncherConfigPatcher.cs

@@ -1,3 +1,6 @@
+using System.Text;
+using System.Xml;
+
 namespace DayZLauncher.UnixPatcher.Patches;
 
 public static class LauncherConfigPatcher
@@ -28,6 +31,98 @@ public static void ApplySettingsBandAid(string gamePath)
         }
 
         var symLinkPath = bohemiaPath[0..^1];
-        File.CreateSymbolicLink(symLinkPath, bohemiaPath);
+        if (!Directory.Exists(symLinkPath))
+        {
+            File.CreateSymbolicLink(symLinkPath, bohemiaPath);
+        }
+    }
+
+        public static async Task PatchLauncherConfigFile(string gamePath)
+    {
+        var configFilePath = $"{gamePath}/DayZLauncher.exe.config";
+        string? newXml = string.Empty;
+
+        if (!File.Exists(configFilePath))
+        {
+            Common.WriteLine("Failed to find DayZLauncher.exe.config!");
+            return;
+        }
+
+        using (var configStream = new FileStream(configFilePath, FileMode.Open, FileAccess.Read, FileShare.None, 4096, true))
+        {
+            var configXml = new XmlDocument();
+            configXml.Load(configStream);
+            await configStream.FlushAsync();
+
+            var sectionGroup = configXml.SelectSingleNode("//sectionGroup[@name='userSettings']");
+            sectionGroup?.ParentNode?.RemoveChild(sectionGroup);
+
+            var userSettings = configXml.SelectSingleNode("//userSettings");
+            userSettings?.ParentNode?.RemoveChild(userSettings);
+
+            newXml = new string(configXml.OuterXml);
+        }
+
+        newXml = IndentXml(newXml);
+        await File.WriteAllTextAsync(configFilePath, newXml);
+    }
+
+    public static void RemoveOldUserConfig(string gamePath)
+    {
+        var prefixPath = $"{gamePath}/../../compatdata/221100/pfx";
+
+        if (!Directory.Exists(prefixPath))
+        {
+            var systemPrefix = Common.TryGetGamePrefixFromSystem();
+            if (systemPrefix is null)
+            {
+                Common.WriteLine($"Failed to find game prefix at: '{prefixPath}'", ConsoleColor.Red);
+                Common.WriteLine("""
+                You should manually delete the following file for launcher to work!!! 
+                > C:/users/steamuser/AppData/Local/Bohemia Interactive/DayZ Launcher_*/*/user.config
+                """,
+                ConsoleColor.Yellow);
+                return;
+            }
+
+            prefixPath = systemPrefix;
+        }
+
+        Common.WriteLine("Proton prefix found!");
+
+        var bohemiaPath = $"{prefixPath}/drive_c/users/steamuser/AppData/Local/Bohemia Interactive a.s.";
+        if (!Directory.Exists(bohemiaPath))
+        {
+            Common.WriteLine("Could not find config settings folder, nothing to patch");
+            return;
+        }
+
+        var configFiles = Directory.EnumerateFiles(bohemiaPath, "user.config", SearchOption.AllDirectories);
+        foreach (var file in configFiles)
+        {
+            Common.WriteLine($"Deleting settings file: {file}", ConsoleColor.Green);
+            File.Delete(file);
+        }
+    }
+
+    private static string IndentXml(string xml)
+    {
+        var doc = new XmlDocument();
+        doc.LoadXml(xml);
+
+        var settings = new XmlWriterSettings
+        {
+            Indent = true,
+            IndentChars = "  ",
+            NewLineChars = "\r\n",
+            NewLineHandling = NewLineHandling.Replace,
+            Encoding = Encoding.UTF8
+        };
+
+        var sb = new StringBuilder();
+        using var xmlWriter = XmlWriter.Create(sb, settings);
+        doc.Save(xmlWriter);
+        var xmlString = sb.ToString();
+        return xmlString.Replace("utf-16", "utf-8");
     }
 }

src/DayZLauncher.UnixPatcher/Program.cs

@@ -61,6 +61,8 @@
 try
 {
     LauncherConfigPatcher.ApplySettingsBandAid(userInput);
+    await LauncherConfigPatcher.PatchLauncherConfigFile(userInput);
+    LauncherConfigPatcher.RemoveOldUserConfig(userInput);
     Common.WriteLine("Settings fix applied!", ConsoleColor.Green);
 }
 catch