Extract PyRunner as singleton for DI

StabilityMatrix/App.xaml.cs

@@ -38,19 +38,23 @@ namespace StabilityMatrix
 
             var serviceCollection = new ServiceCollection();
             serviceCollection.AddSingleton<IPageService, PageService>();
+            serviceCollection.AddSingleton<IContentDialogService, ContentDialogService>();
+            serviceCollection.AddSingleton<IPackageFactory, PackageFactory>();
+            serviceCollection.AddSingleton<IPyRunner, PyRunner>();
+            
             serviceCollection.AddTransient<MainWindow>();
             serviceCollection.AddTransient<SettingsPage>();
             serviceCollection.AddTransient<LaunchPage>();
             serviceCollection.AddTransient<InstallPage>();
             serviceCollection.AddTransient<TextToImagePage>();
+            
             serviceCollection.AddTransient<MainWindowViewModel>();
             serviceCollection.AddSingleton<SettingsViewModel>();
             serviceCollection.AddSingleton<LaunchViewModel>();
             serviceCollection.AddSingleton<InstallerViewModel>();
             serviceCollection.AddSingleton<TextToImageViewModel>();
             serviceCollection.AddSingleton<LaunchOptionsDialogViewModel>();
-            serviceCollection.AddSingleton<IContentDialogService, ContentDialogService>();
+            
-            serviceCollection.AddSingleton<IPackageFactory, PackageFactory>();
             serviceCollection.AddSingleton<BasePackage, A3WebUI>();
             serviceCollection.AddSingleton<BasePackage, DankDiffusion>();
             serviceCollection.AddSingleton<ISnackbarService, SnackbarService>();

StabilityMatrix/IPyRunner.cs

@@ -0,0 +1,47 @@
+using System.IO;
+using System.Threading.Tasks;
+
+namespace StabilityMatrix;
+
+public interface IPyRunner
+{
+    /// <summary>
+    /// Initializes the Python runtime using the embedded dll.
+    /// Can be called with no effect after initialization.
+    /// </summary>
+    /// <exception cref="FileNotFoundException">Thrown if Python DLL not found.</exception>
+    Task Initialize();
+
+    /// <summary>
+    /// One-time setup for get-pip
+    /// </summary>
+    Task SetupPip();
+
+    /// <summary>
+    /// Install a Python package with pip
+    /// </summary>
+    Task InstallPackage(string package);
+
+    /// <summary>
+    /// Evaluate Python expression and return its value as a string
+    /// </summary>
+    /// <param name="expression"></param>
+    Task<string> Eval(string expression);
+
+    /// <summary>
+    /// Evaluate Python expression and return its value
+    /// </summary>
+    /// <param name="expression"></param>
+    Task<T> Eval<T>(string expression);
+
+    /// <summary>
+    /// Execute Python code without returning a value
+    /// </summary>
+    /// <param name="code"></param>
+    Task Exec(string code);
+
+    /// <summary>
+    /// Return the Python version as a PyVersionInfo struct
+    /// </summary>
+    Task<PyVersionInfo> GetVersionInfo();
+}

StabilityMatrix/PyIOStream.cs

@@ -10,7 +10,7 @@ namespace StabilityMatrix;
 /// Implement the interface of the sys.stdout redirection
 /// </summary>
 [SuppressMessage("ReSharper", "InconsistentNaming")]
-internal class PyIOStream
+public class PyIOStream
 {
     private readonly StringBuilder TextBuilder;
     private readonly StringWriter TextWriter;

StabilityMatrix/PyRunner.cs

@@ -2,17 +2,19 @@
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
+using Microsoft.Extensions.Logging;
 using NLog;
 using Python.Runtime;
 using StabilityMatrix.Helper;
+using ILogger = NLog.ILogger;
 
 namespace StabilityMatrix;
 
-internal record struct PyVersionInfo(int Major, int Minor, int Micro, string ReleaseLevel, int Serial);
+public record struct PyVersionInfo(int Major, int Minor, int Micro, string ReleaseLevel, int Serial);
 
-internal static class PyRunner
+public class PyRunner : IPyRunner
 {
-    private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
+    private readonly ILogger<PyRunner> logger;
 
     private const string RelativeDllPath = @"Assets\Python310\python310.dll";
     private const string RelativeExePath = @"Assets\Python310\python.exe";
@@ -23,25 +25,31 @@ internal static class PyRunner
     public static string PipExePath => Path.Combine(AppDomain.CurrentDomain.BaseDirectory, RelativePipExePath);
     public static string GetPipPath => Path.Combine(AppDomain.CurrentDomain.BaseDirectory, RelativeGetPipPath);
     
-    public static PyIOStream? StdOutStream;
-    public static PyIOStream? StdErrStream;
-
     private static readonly SemaphoreSlim PyRunning = new(1, 1);
     
+    private PyIOStream? StdOutStream;
+    private PyIOStream? StdErrStream;
+
+    public PyRunner(ILogger<PyRunner> logger)
+    {
+        this.logger = logger;
+    }
+
     /// <summary>
     /// Initializes the Python runtime using the embedded dll.
     /// Can be called with no effect after initialization.
     /// </summary>
     /// <exception cref="FileNotFoundException">Thrown if Python DLL not found.</exception>
-    public static async Task Initialize()
+    public async Task Initialize()
     {
         if (PythonEngine.IsInitialized) return;
 
-        Logger.Trace($"Initializing Python runtime with DLL '{DllPath}'");
+        logger.LogInformation("Initializing Python runtime with DLL: {DllPath}", DllPath);
 
         // Check PythonDLL exists
         if (!File.Exists(DllPath))
         {
+            logger.LogError("Python DLL not found");
             throw new FileNotFoundException("Python DLL not found", DllPath);
         }
         Runtime.PythonDLL = DllPath;
@@ -62,7 +70,7 @@ internal static class PyRunner
     /// <summary>
     /// One-time setup for get-pip
     /// </summary>
-    public static async Task SetupPip()
+    public async Task SetupPip()
     {
         if (!File.Exists(GetPipPath))
         {
@@ -75,7 +83,7 @@ internal static class PyRunner
     /// <summary>
     /// Install a Python package with pip
     /// </summary>
-    public static async Task InstallPackage(string package)
+    public async Task InstallPackage(string package)
     {
         if (!File.Exists(PipExePath))
         {
@@ -92,7 +100,7 @@ internal static class PyRunner
     /// <param name="waitTimeout">Time limit for waiting on PyRunning lock.</param>
     /// <param name="cancelToken">Cancellation token.</param>
     /// <exception cref="OperationCanceledException">cancelToken was canceled, or waitTimeout expired.</exception>
-    private static async Task<T> RunInThreadWithLock<T>(Func<T> func, TimeSpan? waitTimeout = null, CancellationToken cancelToken = default)
+    private async Task<T> RunInThreadWithLock<T>(Func<T> func, TimeSpan? waitTimeout = null, CancellationToken cancelToken = default)
     {
         // Wait to acquire PyRunning lock
         await PyRunning.WaitAsync(cancelToken).ConfigureAwait(false);
@@ -119,7 +127,7 @@ internal static class PyRunner
     /// <param name="waitTimeout">Time limit for waiting on PyRunning lock.</param>
     /// <param name="cancelToken">Cancellation token.</param>
     /// <exception cref="OperationCanceledException">cancelToken was canceled, or waitTimeout expired.</exception>
-    private static async Task RunInThreadWithLock(Action action, TimeSpan? waitTimeout = null, CancellationToken cancelToken = default)
+    private async Task RunInThreadWithLock(Action action, TimeSpan? waitTimeout = null, CancellationToken cancelToken = default)
     {
         // Wait to acquire PyRunning lock
         await PyRunning.WaitAsync(cancelToken).ConfigureAwait(false);
@@ -143,7 +151,7 @@ internal static class PyRunner
     /// Evaluate Python expression and return its value as a string
     /// </summary>
     /// <param name="expression"></param>
-    public static async Task<string> Eval(string expression)
+    public async Task<string> Eval(string expression)
     {
         return await Eval<string>(expression);
     }
@@ -152,7 +160,7 @@ internal static class PyRunner
     /// Evaluate Python expression and return its value
     /// </summary>
     /// <param name="expression"></param>
-    public static Task<T> Eval<T>(string expression)
+    public Task<T> Eval<T>(string expression)
     {
         return RunInThreadWithLock(() =>
         {
@@ -165,7 +173,7 @@ internal static class PyRunner
     /// Execute Python code without returning a value
     /// </summary>
     /// <param name="code"></param>
-    public static Task Exec(string code)
+    public Task Exec(string code)
     {
         return RunInThreadWithLock(() =>
         {
@@ -176,7 +184,7 @@ internal static class PyRunner
     /// <summary>
     /// Return the Python version as a PyVersionInfo struct
     /// </summary>
-    public static async Task<PyVersionInfo> GetVersionInfo()
+    public async Task<PyVersionInfo> GetVersionInfo()
     {
         var version = await RunInThreadWithLock(() =>
         {

StabilityMatrix/ViewModels/InstallerViewModel.cs

@@ -19,6 +19,7 @@ public partial class InstallerViewModel : ObservableObject
 {
     private readonly ILogger<InstallerViewModel> logger;
     private readonly ISettingsManager settingsManager;
+    private readonly IPyRunner pyRunner;
 
     [ObservableProperty]
     [NotifyPropertyChangedFor(nameof(ProgressBarVisibility))]
@@ -47,10 +48,11 @@ public partial class InstallerViewModel : ObservableObject
     private bool updateAvailable;
 
     public InstallerViewModel(ILogger<InstallerViewModel> logger, ISettingsManager settingsManager,
-        IPackageFactory packageFactory)
+        IPackageFactory packageFactory, IPyRunner pyRunner)
     {
         this.logger = logger;
         this.settingsManager = settingsManager;
+        this.pyRunner = pyRunner;
 
         ProgressText = "shrug";
         InstallButtonText = "Install";
@@ -120,16 +122,16 @@ public partial class InstallerViewModel : ObservableObject
         await InstallPackage();
 
         ProgressText = "Installing dependencies...";
-        await PyRunner.Initialize();
+        await pyRunner.Initialize();
         if (!settingsManager.Settings.HasInstalledPip)
         {
-            await PyRunner.SetupPip();
+            await pyRunner.SetupPip();
             settingsManager.SetHasInstalledPip(true);
         }
 
         if (!settingsManager.Settings.HasInstalledVenv)
         {
-            await PyRunner.InstallPackage("virtualenv");
+            await pyRunner.InstallPackage("virtualenv");
             settingsManager.SetHasInstalledVenv(true);
         }
 

StabilityMatrix/ViewModels/LaunchViewModel.cs

@@ -22,6 +22,8 @@ public partial class LaunchViewModel : ObservableObject
     private readonly IContentDialogService contentDialogService;
     private readonly LaunchOptionsDialogViewModel launchOptionsDialogViewModel;
     private readonly ILogger<LaunchViewModel> logger;
+    private readonly IPyRunner pyRunner;
+    
     private BasePackage? runningPackage;
     private bool clearingPackages = false;
 
@@ -61,8 +63,10 @@ public partial class LaunchViewModel : ObservableObject
         IPackageFactory packageFactory,
         IContentDialogService contentDialogService,
         LaunchOptionsDialogViewModel launchOptionsDialogViewModel,
-        ILogger<LaunchViewModel> logger)
+        ILogger<LaunchViewModel> logger,
+        IPyRunner pyRunner)
     {
+        this.pyRunner = pyRunner;
         this.contentDialogService = contentDialogService;
         this.launchOptionsDialogViewModel = launchOptionsDialogViewModel;
         this.logger = logger;
@@ -92,7 +96,7 @@ public partial class LaunchViewModel : ObservableObject
             return;
         }
 
-        await PyRunner.Initialize();
+        await pyRunner.Initialize();
 
         // Get path from package
         var packagePath = SelectedPackage.Path!;
@@ -117,14 +121,14 @@ public partial class LaunchViewModel : ObservableObject
         var name = SelectedPackage?.Name;
         if (name == null)
         {
-            Debug.WriteLine($"Selected package is null");
+            logger.LogWarning($"Selected package is null");
             return;
         }
 
         var package = packageFactory.FindPackageByName(name);
         if (package == null)
         {
-            Debug.WriteLine($"Package {name} not found");
+            logger.LogWarning("Package {Name} not found", name);
             return;
         }
 
@@ -152,16 +156,20 @@ public partial class LaunchViewModel : ObservableObject
     public void OnLoaded()
     {
         LoadPackages();
-        if (InstalledPackages.Any() && settingsManager.Settings.ActiveInstalledPackage != null)
+        lock (InstalledPackages)
+        {
+            // Skip if no packages
+            if (!InstalledPackages.Any())
             {
-            SelectedPackage =
+                logger.LogTrace($"No packages for {nameof(LaunchViewModel)}");
-                InstalledPackages[
+                return;
-                    InstalledPackages.IndexOf(InstalledPackages.FirstOrDefault(x =>
-                        x.Id == settingsManager.Settings.ActiveInstalledPackage))];
             }
-        else if (InstalledPackages.Any())
+            var activePackageId = settingsManager.Settings.ActiveInstalledPackage;
+            if (activePackageId != null)
             {
-            SelectedPackage = InstalledPackages[0];
+                SelectedPackage = InstalledPackages.FirstOrDefault(
+                    x => x.Id == activePackageId) ?? InstalledPackages[0];
+            }
         }
     }
 

StabilityMatrix/ViewModels/SettingsViewModel.cs

@@ -17,6 +17,7 @@ namespace StabilityMatrix.ViewModels;
 public partial class SettingsViewModel : ObservableObject
 {
     private readonly ISettingsManager settingsManager;
+    private readonly IPyRunner pyRunner;
 
     public ObservableCollection<string> AvailableThemes => new()
     {
@@ -27,11 +28,12 @@ public partial class SettingsViewModel : ObservableObject
     private readonly IContentDialogService contentDialogService;
     private readonly IA3WebApi a3WebApi;
 
-    public SettingsViewModel(ISettingsManager settingsManager, IContentDialogService contentDialogService, IA3WebApi a3WebApi)
+    public SettingsViewModel(ISettingsManager settingsManager, IContentDialogService contentDialogService, IA3WebApi a3WebApi, IPyRunner pyRunner)
     {
         this.settingsManager = settingsManager;
         this.contentDialogService = contentDialogService;
         this.a3WebApi = a3WebApi;
+        this.pyRunner = pyRunner;
         SelectedTheme = settingsManager.Settings.Theme ?? "Dark";
     }
 
@@ -66,8 +68,8 @@ public partial class SettingsViewModel : ObservableObject
     public AsyncRelayCommand PythonVersionCommand => new(async () =>
     {
         // Get python version
-        await PyRunner.Initialize();
+        await pyRunner.Initialize();
-        var result = await PyRunner.GetVersionInfo();
+        var result = await pyRunner.GetVersionInfo();
         // Show dialog box
         var dialog = contentDialogService.CreateDialog();
         dialog.Title = "Python version info";
@@ -78,9 +80,7 @@ public partial class SettingsViewModel : ObservableObject
 
     public RelayCommand AddInstallationCommand => new(() =>
     {
-        var initialDirectory = $"{Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData)}\\StabilityMatrix\\Packages";
         // Show dialog box to choose a folder
-
         var dialog = new VistaFolderBrowserDialog
         {
             Description = "Select a folder",