Introduce Architecture enum for supported aches

Currently MelonLoader supports Linux x64, Windows x64 and Windows x86. Enum Architecture simplifies logic on arch detection.

MelonLoader.Installer/Architecture.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel;
+
+namespace MelonLoader.Installer;
+
+/// <summary>
+/// Supported architectures by MelonLoader.
+/// </summary>
+public enum Architecture
+{
+    [Description("unknown")]
+    Unknown,
+    [Description("win-x86")]
+    WindowsX86,
+    [Description("win-x64")]
+    WindowsX64,
+    [Description("linux-x64")]
+    LinuxX64,
+}

MelonLoader.Installer/GameManager.cs

@@ -100,7 +100,7 @@ public static void RemoveGame(GameModel game)
 
         path = Path.GetFullPath(path);
 
-        var linux = false;
+        var arch = Architecture.Unknown;
 
         var rawDataDirs = Directory.GetDirectories(path, "*_Data");
         var dataDirs = rawDataDirs.Where(x => File.Exists(x[..^5] + ".exe")).ToArray();
@@ -109,7 +109,7 @@ public static void RemoveGame(GameModel game)
             dataDirs = rawDataDirs.Where(x => File.Exists(x[..^5] + ".x86_64")).ToArray();
             if (dataDirs.Length != 0)
             {
-                linux = true;
+                arch = Architecture.LinuxX64;
             }
             else
             {
@@ -124,21 +124,20 @@ public static void RemoveGame(GameModel game)
             return null;
         }
 
-        var exe = dataDirs[0][..^5] + (linux ? ".x86_64" : ".exe");
+        var exe = dataDirs[0][..^5] + (arch == Architecture.LinuxX64 ? ".x86_64" : ".exe");
 
         if (Games.Any(x => x.Path.Equals(exe, StringComparison.OrdinalIgnoreCase)))
         {
             errorMessage = "Game is already listed.";
             return null;
         }
 
-        var is64 = true;
-        if (!linux)
+        if (arch == Architecture.Unknown)
         {
             try
             {
                 using var pe = new PEReader(File.OpenRead(exe));
-                is64 = pe.PEHeaders.CoffHeader.Machine == Machine.Amd64;
+                arch = pe.PEHeaders.CoffHeader.Machine == Machine.Amd64 ? Architecture.WindowsX64 : Architecture.WindowsX86;
             }
             catch
             {
@@ -147,8 +146,8 @@ public static void RemoveGame(GameModel game)
             }
         }
 
-        var mlVersion = MLVersion.GetMelonLoaderVersion(path, out var ml86, out var mlLinux);
-        if (mlVersion != null && (is64 == ml86 || linux != mlLinux))
+        var mlVersion = MLVersion.GetMelonLoaderVersion(path, out var mlArch);
+        if (mlVersion != null && (mlArch != arch))
             mlVersion = null;
 
         Bitmap? icon = null;
@@ -169,7 +168,7 @@ public static void RemoveGame(GameModel game)
 
         var isProtected = Directory.Exists(Path.Combine(path, "EasyAntiCheat"));
 
-        var result = new GameModel(exe, customName ?? Path.GetFileNameWithoutExtension(exe), !is64, linux, launcher, icon, mlVersion, isProtected);
+        var result = new GameModel(exe, customName ?? Path.GetFileNameWithoutExtension(exe), arch, launcher, icon, mlVersion, isProtected);
         errorMessage = null;
 
         AddGameSorted(result);

MelonLoader.Installer/MLManager.cs

@@ -1,4 +1,5 @@
-using Semver;
+using MelonLoader.Installer.Utils;
+using Semver;
 using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Nodes;
 
@@ -310,7 +311,7 @@ public static void SetLocalZip(string zipPath, InstallProgressEventHandler? onPr
             return;
         }
 
-        var mlVer = MLVersion.GetMelonLoaderVersion(Config.LocalZipCache, out var x86, out var linux);
+        var mlVer = MLVersion.GetMelonLoaderVersion(Config.LocalZipCache, out var arch);
         if (mlVer == null)
         {
             onFinished?.Invoke("The selected zip archive does not contain a valid MelonLoader build.");
@@ -320,9 +321,9 @@ public static void SetLocalZip(string zipPath, InstallProgressEventHandler? onPr
         var version = new MLVersion()
         {
             Version = mlVer,
-            DownloadUrlWin = !linux ? (!x86 ? Config.LocalZipCache : null) : null,
-            DownloadUrlWinX86 = !linux ? (x86 ? Config.LocalZipCache : null) : null,
-            DownloadUrlLinux = linux ? Config.LocalZipCache : null,
+            DownloadUrlWin = arch == Architecture.WindowsX64 ? Config.LocalZipCache : null,
+            DownloadUrlWinX86 = arch == Architecture.WindowsX86 ? Config.LocalZipCache : null,
+            DownloadUrlLinux = arch == Architecture.LinuxX64 ? Config.LocalZipCache : null,
             IsLocalPath = true
         };
 
@@ -332,12 +333,19 @@ public static void SetLocalZip(string zipPath, InstallProgressEventHandler? onPr
         onFinished?.Invoke(null);
     }
 
-    public static async Task InstallAsync(string gameDir, bool removeUserFiles, MLVersion version, bool linux, bool x86, InstallProgressEventHandler? onProgress, InstallFinishedEventHandler? onFinished)
+    public static async Task InstallAsync(string gameDir, bool removeUserFiles, MLVersion version, Architecture arch, InstallProgressEventHandler? onProgress, InstallFinishedEventHandler? onFinished)
     {
-        var downloadUrl = linux ? (!x86 ? version.DownloadUrlLinux : null) : (x86 ? version.DownloadUrlWinX86 : version.DownloadUrlWin);
+        var downloadUrl = arch switch
+        {
+            Architecture.LinuxX64 => version.DownloadUrlLinux,
+            Architecture.WindowsX64 => version.DownloadUrlWin,
+            Architecture.WindowsX86 => version.DownloadUrlWinX86,
+            _ => null
+        };
+
         if (downloadUrl == null)
         {
-            onFinished?.Invoke($"The selected version does not support the selected architecture: {(linux ? "linux" : "win")}-{(x86 ? "x86" : "x64")}");
+            onFinished?.Invoke($"The selected version does not support the selected architecture: {arch.GetDescription()}");
             return;
         }
 

MelonLoader.Installer/MLVersion.cs

@@ -12,10 +12,9 @@ public class MLVersion
     public required SemVersion Version { get; init; }
     public bool IsLocalPath { get; init; }
 
-    public static SemVersion? GetMelonLoaderVersion(string gameDir, out bool x86, out bool linux)
+    public static SemVersion? GetMelonLoaderVersion(string gameDir, out Architecture architecture)
     {
-        x86 = false;
-        linux = false;
+        architecture = Architecture.Unknown;
 
         var mlDir = Path.Combine(gameDir, "MelonLoader");
         if (!Directory.Exists(mlDir))
@@ -57,17 +56,17 @@ public class MLVersion
             return null;
 
         proxyPath = Path.Combine(gameDir, proxyPath);
-
-        linux = proxyPath.EndsWith(".so");
-
-        if (linux)
+        if (proxyPath.EndsWith(".so"))
+        {
+            architecture = Architecture.LinuxX64;
             return version;
+        }
 
         try
         {
             using var proxyStr = File.OpenRead(proxyPath);
             var pe = new PEReader(proxyStr);
-            x86 = pe.PEHeaders.CoffHeader.Machine != Machine.Amd64;
+            architecture = pe.PEHeaders.CoffHeader.Machine == Machine.Amd64 ? Architecture.WindowsX64 : Architecture.WindowsX86;
             return version;
         }
         catch

MelonLoader.Installer/Utils/EnumHelper.cs

@@ -0,0 +1,28 @@
+using System.ComponentModel;
+
+namespace MelonLoader.Installer.Utils;
+
+/// <summary>
+/// Class for converting Description annotations into string
+/// </summary>
+public static class EnumHelper
+{
+    public static string? GetDescription<T>(this T enumValue) 
+        where T : struct, IConvertible
+    {
+        if (!typeof(T).IsEnum)
+            return null;
+
+        var description = enumValue.ToString();
+        var fieldInfo = enumValue.GetType().GetField(enumValue.ToString());
+
+        if (fieldInfo == null)
+            return description;
+
+        var attrs = fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), true);
+        if (attrs.Length > 0)
+            description = ((DescriptionAttribute)attrs[0]).Description;
+
+        return description;
+    }
+}

MelonLoader.Installer/ViewModels/GameModel.cs

@@ -4,12 +4,12 @@
 
 namespace MelonLoader.Installer.ViewModels;
 
-public class GameModel(string path, string name, bool is32Bit, bool isLinux, GameLauncher? launcher, Bitmap? icon, SemVersion? mlVersion, bool isProtected) : ViewModelBase
+public class GameModel(string path, string name, Architecture architecture, GameLauncher? launcher, Bitmap? icon, SemVersion? mlVersion, bool isProtected) : ViewModelBase
 {
     public string Path => path;
     public string Name => name;
-    public bool Is32Bit => is32Bit;
-    public bool IsLinux => isLinux;
+    public Architecture Arch => architecture;
+    public bool IsLinux => architecture == Architecture.LinuxX64;
     public GameLauncher? Launcher => launcher;
     public Bitmap? Icon => icon;
     public string? MLVersionText => mlVersion != null ? 'v' + mlVersion.ToString() : null;
@@ -47,8 +47,8 @@ public bool ValidateGame()
             return false;
         }
 
-        var newMlVersion = Installer.MLVersion.GetMelonLoaderVersion(Dir, out var ml86, out var mlLinux);
-        if (newMlVersion != null && (ml86 != Is32Bit || mlLinux != IsLinux))
+        var newMlVersion = Installer.MLVersion.GetMelonLoaderVersion(Dir, out var arch);
+        if (newMlVersion != null && arch != Arch)
             newMlVersion = null;
 
         if (newMlVersion == MLVersion) 

MelonLoader.Installer/Views/DetailsView.axaml.cs

@@ -3,6 +3,7 @@
 using Avalonia.Interactivity;
 using Avalonia.Platform.Storage;
 using Avalonia.Threading;
+using MelonLoader.Installer.Utils;
 using MelonLoader.Installer.ViewModels;
 using System.ComponentModel;
 using System.Runtime.InteropServices;
@@ -44,7 +45,7 @@ protected override async void OnDataContextChanged(EventArgs e)
             return;
 
 #if LINUX
-        if (Model.Game.IsLinux)
+        if (Model.Game.Arch == Architecture.LinuxX64)
         {
             LdLibPathVar.Text = $"LD_LIBRARY_PATH=\"{Model.Game.Dir}:$LD_LIBRARY_PATH\"";
             SteamLaunchOptions.Text = $"{LdLibPathVar.Text} {LdPreloadVar.Text} %command%";
@@ -74,7 +75,13 @@ public void UpdateVersionList()
         if (Model == null)
             return;
 
-        var en = MLManager.Versions.Where(x => (Model.Game.IsLinux ? x.DownloadUrlLinux : (Model.Game.Is32Bit ? x.DownloadUrlWinX86 : x.DownloadUrlWin)) != null);
+        var en = MLManager.Versions.Where(x =>
+        Model.Game.Arch switch
+        {
+            Architecture.LinuxX64 => x.DownloadUrlLinux,
+            Architecture.WindowsX86 => x.DownloadUrlWinX86,
+            _ => x.DownloadUrlWin
+        } != null);
         if (NightlyCheck.IsChecked != true)
             en = en.Where(x => !x.Version.IsPrerelease || x.IsLocalPath);
 
@@ -139,7 +146,7 @@ private void InstallHandler(object sender, RoutedEventArgs args)
         ShowLinuxInstructions.IsVisible = false;
 
         _ = MLManager.InstallAsync(Path.GetDirectoryName(Model.Game.Path)!, Model.Game.MLInstalled && !KeepFilesCheck.IsChecked!.Value,
-            (MLVersion)VersionCombobox.SelectedItem!, Model.Game.IsLinux, Model.Game.Is32Bit,
+            (MLVersion)VersionCombobox.SelectedItem!, Model.Game.Arch,
             (progress, newStatus) => Dispatcher.UIThread.Post(() => OnInstallProgress(progress, newStatus)),
             (errorMessage) => Dispatcher.UIThread.Post(() => OnOperationFinished(errorMessage)));
     }
@@ -253,9 +260,16 @@ private async void SelectZipHandler(object sender, TappedEventArgs args)
                 if (errorMessage == null)
                 {
                     var ver = MLManager.Versions[0];
-                    if ((Model.Game.IsLinux ? ver.DownloadUrlLinux : (Model.Game.Is32Bit ? ver.DownloadUrlWinX86 : ver.DownloadUrlWin)) == null)
+                    var downloadUrl = Model.Game.Arch switch
+                    {
+                        Architecture.LinuxX64 => ver.DownloadUrlLinux,
+                        Architecture.WindowsX64 => ver.DownloadUrlWin,
+                        Architecture.WindowsX86 => ver.DownloadUrlWinX86,
+                        _ => null
+                    };
+                    if (downloadUrl == null)
                     {
-                        DialogBox.ShowError($"The selected version does not support the architechture of the current game: {(Model.Game.IsLinux ? "linux" : "win")}-{(Model.Game.Is32Bit ? "x86" : "x64")}");
+                        DialogBox.ShowError($"The selected version does not support the architecture of the current game: {Model.Game.Arch.GetDescription()}");
                     }
                 }
 

MelonLoader.Installer/Views/GameControl.axaml.cs

@@ -29,7 +29,7 @@ protected override void OnDataContextChanged(EventArgs e)
 
         var showWine =
 #if LINUX
-            !Model.IsLinux;
+            Model.Arch != Architecture.LinuxX64;
 #else
             false;
 #endif