More refactoring

Hyperbar.Windows.Primary/IPrimaryCommandConfiguration.cs

@@ -6,5 +6,7 @@ namespace Hyperbar.Windows.Primary;
 [JsonDerivedType(typeof(ProcessCommandConfiguration), typeDiscriminator: "ProcessCommand")]
 public class PrimaryCommandConfiguration
 {
-    public string? Icon { get; set; }
+    public required string Id { get; set; }
+
+    public required string Icon { get; set; }
 }

Hyperbar.Windows.Primary/KeyAcceleratorCommandConfiguration.cs

@@ -3,7 +3,7 @@
 public class KeyAcceleratorCommandConfiguration :
     PrimaryCommandConfiguration
 {
-    public int Key { get; set; }
+    public required int Key { get; set; }
 
     public int[]? Modifiers { get; set; }
 }

Hyperbar.Windows.Primary/PrimaryWidgetConfiguration.cs

@@ -5,6 +5,6 @@ public class PrimaryWidgetConfiguration :
 {
     public static PrimaryWidgetConfiguration Defaults => new()
     {
-        new KeyAcceleratorCommandConfiguration { Icon = "\uE720", Key = 91, Modifiers = [] }
+        new KeyAcceleratorCommandConfiguration { Id = $"{Guid.NewGuid()}", Icon = "\uE720", Key = 91, Modifiers = [] }
     };
 }

Hyperbar.Windows.Primary/PrimaryWidgetConfigurationChangedHandler.cs

@@ -1,22 +0,0 @@
-namespace Hyperbar.Windows.Primary;
-
-public class PrimaryWidgetConfigurationChangedHandler :
-    INotificationHandler<ConfigurationChanged<PrimaryWidgetConfiguration>>
-{
-    private readonly IMediator mediator;
-    private readonly IEnumerable<IWidgetComponentViewModel> items;
-
-    public PrimaryWidgetConfigurationChangedHandler(IMediator mediator,
-        IEnumerable<IWidgetComponentViewModel> items)
-    {
-        this.mediator = mediator;
-        this.items = items;
-    }
-
-    public async ValueTask Handle(ConfigurationChanged<PrimaryWidgetConfiguration> notification, 
-        CancellationToken cancellationToken)
-    {
-        await mediator.PublishAsync(new CollectionChanged<IEnumerable<IWidgetComponentViewModel>>(items), 
-            cancellationToken);
-    }
-}

Hyperbar.Windows.Primary/PrimaryWidgetProvider.cs

@@ -6,9 +6,11 @@ namespace Hyperbar.Windows.Primary;
 public class PrimaryWidgetProvider :
     IWidgetProvider
 {
-    public void Create(HostBuilderContext comtext, IServiceCollection services) => 
+    public void Create(HostBuilderContext comtext, IServiceCollection services) =>
             services.AddConfiguration<PrimaryWidgetConfiguration>()
-                .AddHandler<WidgetComponentMapping>()
-                .AddHandler<PrimaryWidgetConfigurationChangedHandler>()
-                .AddWidgetTemplate<PrimaryWidgetViewModel>();
+                .AddTransient<IFactory<IEnumerable<IWidgetComponentViewModel>>, WidgetComponentViewModelFactory>()
+                .AddWidgetTemplate<PrimaryWidgetViewModel>()
+                .AddNotificationPipeline<ConfigurationChanged<PrimaryWidgetConfiguration>, 
+                    ValueChanging<IEnumerable<IWidgetComponentViewModel>>>();
+
 }

Hyperbar.Windows.Primary/PrimaryWidgetViewModel.cs

@@ -4,8 +4,8 @@ namespace Hyperbar.Windows.Primary;
 public class PrimaryWidgetViewModel(ITemplateFactory templateFactory,
     IServiceFactory serviceFactory,
     IMediator mediator,
-    IEnumerable<IWidgetComponentViewModel> items) :
-    ObservableCollectionViewModel<IWidgetComponentViewModel>(serviceFactory, mediator, items),
+    IFactory<IEnumerable<IWidgetComponentViewModel>> factory) :
+    ObservableCollectionViewModel<IWidgetComponentViewModel>(serviceFactory, mediator, factory),
     IWidgetViewModel,
     ITemplatedViewModel
 {

Hyperbar.Windows.Primary/ProcessCommandConfiguration.cs

@@ -3,5 +3,5 @@
 public class ProcessCommandConfiguration :
     PrimaryCommandConfiguration
 {
-    public string? Path { get; set; }
+    public required string Path { get; set; }
 }

Hyperbar.Windows.Primary/WidgetComponentMapping.cs

@@ -1,25 +0,0 @@
-namespace Hyperbar.Windows.Primary;
-
-public class WidgetComponentMapping(PrimaryWidgetConfiguration configuration,
-    IServiceFactory service,
-    IMediator mediator) :
-    IMappingHandler<PrimaryWidgetConfiguration, IEnumerable<IWidgetComponentViewModel>>
-{
-    public IEnumerable<IWidgetComponentViewModel> Handle()
-    {
-        foreach (var item in configuration)
-        {
-            if (item is KeyAcceleratorCommandConfiguration keyAcceleratorCommandConfiguration)
-            {
-                 yield return service.Create<WidgetButtonViewModel>(keyAcceleratorCommandConfiguration.Icon, new Action(async () =>
-                   await mediator.SendAsync(new KeyAcceleratorRequest((VirtualKey)keyAcceleratorCommandConfiguration.Key, 
-                    keyAcceleratorCommandConfiguration.Modifiers?.Select(modifier => (VirtualKey)modifier).ToArray()))));
-            }
-
-            if (item is ProcessCommandConfiguration processCommandConfiguration)
-            {
-
-            }
-        }
-    }
-}

Hyperbar.Windows.Primary/WidgetComponentViewModelFactory.cs

@@ -0,0 +1,26 @@
+namespace Hyperbar.Windows.Primary;
+
+public class WidgetComponentViewModelFactory(PrimaryWidgetConfiguration configuration,
+    IServiceFactory service,
+    IMediator mediator) : 
+    IFactory<IEnumerable<IWidgetComponentViewModel>>
+{
+    public IEnumerable<IWidgetComponentViewModel> Create()
+    {
+        foreach (PrimaryCommandConfiguration item in configuration)
+        {
+            if (item is KeyAcceleratorCommandConfiguration keyAcceleratorCommandConfiguration)
+            {
+                yield return service.Create<WidgetButtonViewModel>(keyAcceleratorCommandConfiguration.Icon, new Action(async () =>
+                  await mediator.SendAsync(new KeyAcceleratorRequest((VirtualKey)keyAcceleratorCommandConfiguration.Key,
+                   keyAcceleratorCommandConfiguration.Modifiers?.Select(modifier => (VirtualKey)modifier).ToArray()))));
+            }
+
+            if (item is ProcessCommandConfiguration processCommandConfiguration)
+            {
+                yield return service.Create<WidgetButtonViewModel>(processCommandConfiguration.Icon, new Action(async () =>
+                   await mediator.SendAsync(new ProcessRequest(processCommandConfiguration.Path))));
+            }
+        }
+    }
+}

Hyperbar/Extensions/IServiceCollectionExtensions.cs

@@ -16,8 +16,16 @@ public static class IServiceCollectionExtensions
         return services.AddConfiguration<TConfiguration>(typeof(TConfiguration).Name, "Settings.json", null);
     }
 
+    public static IServiceCollection AddNotificationPipeline<TFromNotification, TToNotification>(this IServiceCollection services)
+        where TFromNotification :
+        INotification
+        where TToNotification :
+        INotification, new()
+    {
+        return services.AddHandler<NotficationPipelineHandler<TFromNotification, TToNotification>>();
+    }
+
     public static IServiceCollection AddConfiguration<TConfiguration>(this IServiceCollection services,
-        IConfiguration configuration,
         TConfiguration? defaults = null)
         where TConfiguration :
         class, new()

Hyperbar/Lifecycles/IFactory.cs

@@ -0,0 +1,6 @@
+namespace Hyperbar;
+
+public interface IFactory<T>
+{
+    T Create();
+}

Hyperbar/Mediators/NotficationPipelineHandler.cs

@@ -0,0 +1,18 @@
+namespace Hyperbar;
+
+public class NotficationPipelineHandler<TFromNotification, ToNotification>(IMediator mediator) : 
+    INotificationHandler<TFromNotification>,
+    IHandler
+    where TFromNotification :
+    INotification
+    where ToNotification :
+    INotification, new()
+{
+    private readonly IMediator mediator = mediator;
+
+    public ValueTask Handle(TFromNotification notification, CancellationToken cancellationToken)
+    {
+        return mediator.PublishAsync(new ToNotification(), 
+            cancellationToken);
+    }
+}

Hyperbar/Views/CollectionChanged.cs

@@ -1,5 +0,0 @@
-using System.Collections;
-
-namespace Hyperbar;
-
-public record CollectionChanged<TCollection>(TCollection Items) : INotification where TCollection : IEnumerable;

Hyperbar/Views/CollectionChanging.cs

@@ -0,0 +1,5 @@
+using System.Collections;
+
+namespace Hyperbar;
+
+public record ValueChanging<TValue> : INotification;

Hyperbar/Views/IObservableCollectionViewModel.cs

@@ -0,0 +1,11 @@
+using System.Collections;
+using System.Collections.Specialized;
+
+namespace Hyperbar;
+
+public interface IObservableCollectionViewModel<TItem> : 
+    IList<TItem>,
+    IList,
+    IReadOnlyList<TItem>,
+    INotifyCollectionChanged,
+    INotificationHandler<ValueChanging<IEnumerable<TItem>>>;

Hyperbar/Views/ObservableCollectionViewModel.cs

@@ -5,13 +5,9 @@ using System.Collections.Specialized;
 
 namespace Hyperbar;
 
-public partial class ObservableCollectionViewModel<TItem> : 
+public partial class ObservableCollectionViewModel<TItem> :
     ObservableObject,
-    IList<TItem>, 
-    IList, 
-    IReadOnlyList<TItem>, 
-    INotifyCollectionChanged,
-    INotificationHandler<CollectionChanged<IEnumerable<TItem>>>
+    IObservableCollectionViewModel<TItem>
 {
     public ObservableCollection<TItem> collection = [];
     private readonly SynchronizationContext? context;
@@ -28,6 +24,23 @@ public partial class ObservableCollectionViewModel<TItem> :
         collection.CollectionChanged += OnCollectionChanged;
     }
 
+    public ObservableCollectionViewModel(IServiceFactory serviceFactory,
+        IMediator mediator,
+        IFactory<IEnumerable<TItem>> factory)
+    {
+        context = SynchronizationContext.Current;
+
+        this.serviceFactory = serviceFactory;
+        mediator.Subscribe(this);
+
+        collection.CollectionChanged += OnCollectionChanged;
+
+        if (factory is not null && factory.Create() is { } items)
+        {
+            AddRange(factory.Create());
+        }
+    }
+
     public ObservableCollectionViewModel(IServiceFactory serviceFactory,
         IMediator mediator,
         IEnumerable<TItem> items)
@@ -158,14 +171,14 @@ public partial class ObservableCollectionViewModel<TItem> :
 
     IEnumerator IEnumerable.GetEnumerator() => ((IEnumerable)collection).GetEnumerator();
 
-    public ValueTask Handle(CollectionChanged<IEnumerable<TItem>> notification,
-        CancellationToken cancellationToken)
-    {
-        context?.Post(state => Clear(), null);
-        AddRange(notification.Items);
+    //public ValueTask Handle(CollectionChanged<IEnumerable<TItem>> notification,
+    //    CancellationToken cancellationToken)
+    //{
+    //    context?.Post(state => Clear(), null);
+    //    AddRange(notification.Items);
 
-        return ValueTask.CompletedTask;
-    }
+    //    return ValueTask.CompletedTask;
+    //}
 
     public int IndexOf(TItem item) => collection.IndexOf(item);
 
@@ -212,9 +225,17 @@ public partial class ObservableCollectionViewModel<TItem> :
 
     protected virtual void SetItem(int index, TItem item) => collection[index] = item;
 
-    private static bool IsCompatibleObject(object? value) => (value is TItem) || (value == null && default(TItem) == null);
+    private static bool IsCompatibleObject(object? value) => (value is TItem) || 
+        (value == null && default(TItem) == null);
 
-    private void OnCollectionChanged(object? sender, NotifyCollectionChangedEventArgs args) => CollectionChanged?.Invoke(this, args);
+    private void OnCollectionChanged(object? sender, NotifyCollectionChangedEventArgs args) => 
+        CollectionChanged?.Invoke(this, args);
+
+    public ValueTask Handle(ValueChanging<IEnumerable<TItem>> notification, 
+        CancellationToken cancellationToken)
+    {
+        throw new NotImplementedException();
+    }
 }
 
 public class ObservableCollectionViewModel(IServiceFactory serviceFactory, IMediator mediator) :