add keyed based publication to mediator

Hyperbar.Windows.Primary/PrimaryWidgetConfigurationHandler.cs

@@ -1,4 +1,5 @@
-namespace Hyperbar.Windows.Primary;
+
+namespace Hyperbar.Windows.Primary;
 
 public class PrimaryWidgetConfigurationHandler(IMediator mediator,
     PrimaryWidgetConfiguration configuration,
@@ -9,26 +10,52 @@ public class PrimaryWidgetConfigurationHandler(IMediator mediator,
     public async Task Handle(ConfigurationChanged<PrimaryWidgetConfiguration> notification,
         CancellationToken cancellationToken)
     {
-        HashSet<Guid> configurationIds = new(configuration.SelectMany(item => new[] { item }
-            .Concat(item.Commands).Select(x => x.Id)));
+        List<(Guid ParentId, Guid Id, PrimaryCommandConfiguration Configuration)> items = [];
 
-        foreach (KeyValuePair<Guid, IWidgetComponentViewModel> item in cache.Where(x => !configurationIds.Contains(x.Key)))
+        void AddToItems(Guid parentId, Guid id, List<PrimaryCommandConfiguration> configurations)
+        {
+            if (configurations is null)
+            {
+                return;
+            }
+
+            Stack<(Guid, List<PrimaryCommandConfiguration>)> stack = new();
+            stack.Push((parentId, configurations));
+
+            while (stack.Count > 0)
+            {
+                (Guid currentParentId, List<PrimaryCommandConfiguration> currentConfigurations) = stack.Pop();
+                foreach (PrimaryCommandConfiguration configuration in currentConfigurations)
+                {
+                    items.Add((currentParentId, configuration.Id, configuration));
+                    if (configuration.Commands is not null && configuration.Commands.Count > 0)
+                    {
+                        stack.Push((configuration.Id, configuration.Commands));
+                    }
+                }
+            }
+        }
+
+        AddToItems(Guid.Empty, Guid.Empty, configuration.Commands);
+
+        foreach (KeyValuePair<Guid, IWidgetComponentViewModel> item in cache
+            .Where(x => !items.Any(k => x.Key == k.Id)))
         {
             await mediator.PublishAsync(new Removed<IWidgetComponentViewModel>(item.Value),
-                cancellationToken);
+                nameof(PrimaryWidgetViewModel),
+                    cancellationToken);
+
             cache.Remove(item.Key);
         }
 
-        foreach (PrimaryCommandConfiguration item in configuration)
+        foreach ((Guid ParentId, Guid Id, PrimaryCommandConfiguration Configuration) item in 
+            items.Where(x => !cache.Any(k => x.Id == k.Key)))
         {
-            if (!cache.ContainsKey(item.Id))
+            if (factory.Create(item.Configuration) is IWidgetComponentViewModel viewModel)
             {
-                if (factory.Create(item) is IWidgetComponentViewModel viewModel)
-                {
-                    await mediator.PublishAsync(Inserted<IWidgetComponentViewModel>
-                            .For<PrimaryWidgetViewModel>(item.Order, viewModel),
-                                cancellationToken);
-                }
+                await mediator.PublishAsync(new Inserted<IWidgetComponentViewModel>(item.Configuration.Order, viewModel),
+                    nameof(PrimaryWidgetViewModel),
+                        cancellationToken);
             }
         }
     }