Update guided installer abstraction and FOMOD installer

Directory.Packages.props

@@ -89,10 +89,11 @@
         <PackageVersion Include="ini-parser-netstandard" Version="2.5.2" />
         <PackageVersion Include="Mutagen.Bethesda.Skyrim" Version="0.41.0-pr002" />
         <PackageVersion Include="NLog.Extensions.Logging" Version="5.3.2" />
+        <PackageVersion Include="OneOf" Version="3.0.255" />
         <PackageVersion Include="ReactiveUI.Fody" Version="19.4.1" />
         <PackageVersion Include="Sewer56.BitStream" Version="1.3.0" />
         <PackageVersion Include="Spectre.Console" Version="0.47.0" />
         <PackageVersion Include="Splat.Microsoft.Extensions.Logging" Version="14.6.37" />
         <PackageVersion Include="Vogen" Version="3.0.20" />
     </ItemGroup>
-</Project>
+</Project>

NexusMods.App.sln

@@ -125,6 +125,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NexusMods.Abstractions", "s
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NexusMods.Games.Generic.Tests", "tests\Games\NexusMods.Games.Generic.Tests\NexusMods.Games.Generic.Tests.csproj", "{AA95B93F-23AC-46D5-83B3-2E7AE4BD309C}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NexusMods.Games.FOMOD.UI", "src\Games\NexusMods.Games.FOMOD.UI\NexusMods.Games.FOMOD.UI.csproj", "{500CE772-93C3-4DA9-9AB3-E9E9EC0A9429}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -307,6 +309,10 @@ Global
 		{AA95B93F-23AC-46D5-83B3-2E7AE4BD309C}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{AA95B93F-23AC-46D5-83B3-2E7AE4BD309C}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{AA95B93F-23AC-46D5-83B3-2E7AE4BD309C}.Release|Any CPU.Build.0 = Release|Any CPU
+		{500CE772-93C3-4DA9-9AB3-E9E9EC0A9429}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{500CE772-93C3-4DA9-9AB3-E9E9EC0A9429}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{500CE772-93C3-4DA9-9AB3-E9E9EC0A9429}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{500CE772-93C3-4DA9-9AB3-E9E9EC0A9429}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -361,6 +367,7 @@ Global
 		{09B037AB-07BB-4154-95FD-6EA2E55C4568} = {897C4198-884F-448A-B0B0-C2A6D971EAE0}
 		{1E20E979-5F04-44FD-BE07-54B6686ECB13} = {E7BAE287-D505-4D6D-A090-665A64309B2D}
 		{AA95B93F-23AC-46D5-83B3-2E7AE4BD309C} = {05B06AC1-7F2B-492F-983E-5BC63CDBF20D}
+		{500CE772-93C3-4DA9-9AB3-E9E9EC0A9429} = {70D38D24-79AE-4600-8E83-17F3C11BA81F}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {9F9F8352-34DD-42C0-8564-EE9AF34A3501}

src/Games/NexusMods.Games.FOMOD.UI/GuidedInstallerStepViewModel.cs

@@ -0,0 +1,49 @@
+using System.Reactive;
+using System.Reactive.Linq;
+using JetBrains.Annotations;
+using NexusMods.App.UI;
+using NexusMods.Common.GuidedInstaller;
+using ReactiveUI;
+using ReactiveUI.Fody.Helpers;
+
+namespace NexusMods.Games.FOMOD.UI;
+
+[UsedImplicitly]
+public class GuidedInstallerStepViewModel : AViewModel<IGuidedInstallerStepViewModel>, IGuidedInstallerStepViewModel
+{
+    [Reactive]
+    public GuidedInstallationStep? InstallationStep { get; set; }
+
+    [Reactive]
+    public TaskCompletionSource<UserChoice>? TaskCompletionSource { get; set; }
+
+    public ReactiveCommand<Unit, Unit> NextStepCommand { get; set; }
+    public ReactiveCommand<Unit, Unit> PreviousStepCommand { get; set; }
+    public ReactiveCommand<Unit, Unit> CancelInstallerCommand { get; set; }
+
+    public GuidedInstallerStepViewModel()
+    {
+        // TODO: other validation
+        var hasTaskCompletionSource = this
+            .WhenAnyValue(vm => vm.TaskCompletionSource)
+            .OnUI()
+            .Select(tcs => tcs is not null);
+
+        NextStepCommand = ReactiveCommand.Create(() =>
+        {
+            // TODO: set result
+            var selectedOptions = Array.Empty<SelectedOption>();
+            TaskCompletionSource?.TrySetResult(new UserChoice(new UserChoice.GoToNextStep(selectedOptions)));
+        }, hasTaskCompletionSource);
+
+        PreviousStepCommand = ReactiveCommand.Create(() =>
+        {
+            TaskCompletionSource?.TrySetResult(new UserChoice(new UserChoice.GoToPreviousStep()));
+        }, hasTaskCompletionSource);
+
+        CancelInstallerCommand = ReactiveCommand.Create(() =>
+        {
+            TaskCompletionSource?.TrySetResult(new UserChoice(new UserChoice.CancelInstallation()));
+        }, hasTaskCompletionSource);
+    }
+}

src/Games/NexusMods.Games.FOMOD.UI/GuidedInstallerUi.cs

@@ -0,0 +1,64 @@
+using System.Diagnostics;
+using JetBrains.Annotations;
+using Microsoft.Extensions.DependencyInjection;
+using NexusMods.Common.GuidedInstaller;
+
+namespace NexusMods.Games.FOMOD.UI;
+
+[UsedImplicitly]
+public sealed class GuidedInstallerUi : IGuidedInstaller, IDisposable
+{
+    private readonly IServiceProvider _serviceProvider;
+
+    private IServiceScope? _currentScope;
+    private IGuidedInstallerWindowViewModel? _windowViewModel;
+
+    public GuidedInstallerUi(IServiceProvider serviceProvider)
+    {
+        _serviceProvider = serviceProvider;
+    }
+
+    public void SetupInstaller(string windowName)
+    {
+        Debug.Assert(_currentScope is null);
+        _currentScope = _serviceProvider.CreateScope();
+
+        // TODO: create/show window?
+        _windowViewModel = _currentScope.ServiceProvider.GetRequiredService<IGuidedInstallerWindowViewModel>();
+        _windowViewModel.WindowName = windowName;
+    }
+
+    public void CleanupInstaller()
+    {
+        if (_windowViewModel is not null)
+        {
+            // TODO: dispose & close window?
+            _windowViewModel.ActiveStepViewModel = null;
+            _windowViewModel = null;
+        }
+
+        _currentScope?.Dispose();
+        _currentScope = null;
+    }
+
+    public async Task<UserChoice> RequestUserChoice(
+        GuidedInstallationStep installationStep,
+        CancellationToken cancellationToken)
+    {
+        Debug.Assert(_currentScope is not null);
+        Debug.Assert(_windowViewModel is not null);
+
+        _windowViewModel.ActiveStepViewModel ??= _currentScope.ServiceProvider.GetRequiredService<IGuidedInstallerStepViewModel>();
+
+        var activeStepViewModel = _windowViewModel.ActiveStepViewModel;
+        activeStepViewModel.InstallationStep = installationStep;
+
+        var tcs = new TaskCompletionSource<UserChoice>();
+        activeStepViewModel.TaskCompletionSource = tcs;
+
+        await tcs.Task;
+        return tcs.Task.Result;
+    }
+
+    public void Dispose() => CleanupInstaller();
+}

src/Games/NexusMods.Games.FOMOD.UI/GuidedInstallerWindowViewModel.cs

@@ -0,0 +1,14 @@
+using JetBrains.Annotations;
+using NexusMods.App.UI;
+using ReactiveUI.Fody.Helpers;
+
+namespace NexusMods.Games.FOMOD.UI;
+
+[UsedImplicitly]
+public class GuidedInstallerWindowViewModel : AViewModel<IGuidedInstallerWindowViewModel>, IGuidedInstallerWindowViewModel
+{
+    [Reactive] public string WindowName { get; set; } = string.Empty;
+
+    [Reactive]
+    public IGuidedInstallerStepViewModel? ActiveStepViewModel { get; set; }
+}

src/Games/NexusMods.Games.FOMOD.UI/IGuidedInstallerStepViewModel.cs

@@ -0,0 +1,19 @@
+using System.Reactive;
+using NexusMods.App.UI;
+using NexusMods.Common.GuidedInstaller;
+using ReactiveUI;
+
+namespace NexusMods.Games.FOMOD.UI;
+
+public interface IGuidedInstallerStepViewModel : IViewModelInterface
+{
+    public GuidedInstallationStep? InstallationStep { get; set; }
+
+    public TaskCompletionSource<UserChoice>? TaskCompletionSource { get; set; }
+
+    public ReactiveCommand<Unit, Unit> NextStepCommand { get; set; }
+
+    public ReactiveCommand<Unit, Unit> PreviousStepCommand { get; set; }
+
+    public ReactiveCommand<Unit, Unit> CancelInstallerCommand { get; set; }
+}

src/Games/NexusMods.Games.FOMOD.UI/IGuidedInstallerWindowViewModel.cs

@@ -0,0 +1,10 @@
+using NexusMods.App.UI;
+
+namespace NexusMods.Games.FOMOD.UI;
+
+public interface IGuidedInstallerWindowViewModel : IViewModelInterface
+{
+    public string WindowName { get; set; }
+
+    public IGuidedInstallerStepViewModel? ActiveStepViewModel { get; set; }
+}

src/Games/NexusMods.Games.FOMOD.UI/NexusMods.Games.FOMOD.UI.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+    <ItemGroup>
+        <ProjectReference Include="..\..\NexusMods.App.UI\NexusMods.App.UI.csproj" />
+    </ItemGroup>
+    <ItemGroup>
+      <Compile Update="GuidedInstallerWindowViewModel.cs">
+        <DependentUpon>IGuidedInstallerWindowViewModel.cs</DependentUpon>
+      </Compile>
+      <Compile Update="GuidedInstallerStepViewModel.cs">
+        <DependentUpon>IGuidedInstallerStepViewModel.cs</DependentUpon>
+      </Compile>
+    </ItemGroup>
+</Project>

src/Games/NexusMods.Games.FOMOD.UI/Services.cs

@@ -0,0 +1,16 @@
+using Microsoft.Extensions.DependencyInjection;
+using NexusMods.App.UI;
+using NexusMods.Common.GuidedInstaller;
+
+namespace NexusMods.Games.FOMOD.UI;
+
+public static class Services
+{
+    public static IServiceCollection AddFomodInstallerUi(this IServiceCollection serviceCollection)
+    {
+        return serviceCollection
+            .AddTransient<IGuidedInstaller, GuidedInstallerUi>()
+            .AddViewModel<GuidedInstallerStepViewModel, IGuidedInstallerStepViewModel>()
+            .AddViewModel<GuidedInstallerWindowViewModel, IGuidedInstallerWindowViewModel>();
+    }
+}

src/Games/NexusMods.Games.FOMOD/CoreDelegates/InstallerDelegates.cs

@@ -2,7 +2,7 @@
 using FomodInstaller.Interface.ui;
 using JetBrains.Annotations;
 using Microsoft.Extensions.Logging;
-using NexusMods.Common.UserInput;
+using NexusMods.Common.GuidedInstaller;
 
 namespace NexusMods.Games.FOMOD.CoreDelegates;
 
@@ -14,10 +14,10 @@ public sealed class InstallerDelegates : ICoreDelegates
     public IPluginDelegates plugin { get; }
     public IUIDelegates ui { get; }
 
-    public InstallerDelegates(ILoggerFactory loggerFactory, IOptionSelector optionSelector)
+    public InstallerDelegates(ILoggerFactory loggerFactory, IGuidedInstaller guidedInstaller)
     {
         context = new ContextDelegates(loggerFactory.CreateLogger<ContextDelegates>());
         plugin = new PluginDelegates(loggerFactory.CreateLogger<PluginDelegates>());
-        ui = new UiDelegates(loggerFactory.CreateLogger<UiDelegates>(), optionSelector);
+        ui = new UiDelegates(loggerFactory.CreateLogger<UiDelegates>(), guidedInstaller);
     }
 }