Passed cancellation tokens to event handlers if needed

src/HopFrame.Web/Components/Dialogs/HopFrameEditor.razor

@@ -1,5 +1,6 @@
 @rendermode InteractiveServer
 @implements IDialogContentComponent<EditorDialogData>
+@implements IDisposable
 
 @using System.Collections
 @using HopFrame.Core.Config
@@ -184,6 +185,7 @@
     private ITableManager? _manager;
     private readonly Dictionary<string, List<string>> _validationErrors = new();
     private readonly List<PropertyChange> _changes = new();
+    private readonly CancellationTokenSource _tokenSource = new();
 
     protected override void OnInitialized() {
         _currentlyEditing = Content.CurrentObject is not null;
@@ -382,7 +384,7 @@
                 Errors = errorList,
                 Property = property,
                 Table = Content.Config
-            });
+            }, _tokenSource.Token);
 
             if (eventResult.IsCanceled) return false;
         }
@@ -400,7 +402,11 @@
         ApplyChanges(Content.CurrentObject!);
         return true;
     }
-    
+
+    public void Dispose() {
+        _tokenSource.Dispose();
+    }
+
     private enum InputType {
         Number,
         Switch,

src/HopFrame.Web/Components/Pages/HopFrameTablePage.razor

@@ -158,6 +158,8 @@
 
     private bool _allSelected;
 
+    private readonly CancellationTokenSource _tokenSource = new();
+
     protected override void OnInitialized() {
         _config ??= Explorer.GetTable(TableDisplayName);
 
@@ -206,7 +208,7 @@
         var eventResult = await PluginOrchestrator.DispatchEvent(new SearchEvent(this) {
             SearchTerm = _searchTerm,
             Table = _config!
-        });
+        }, _tokenSource.Token);
         if (eventResult.IsCanceled) return;
         _searchTerm = eventResult.SearchTerm;
         
@@ -218,7 +220,7 @@
 
         var eventResult = await PluginOrchestrator.DispatchEvent(new ReloadEvent(this) {
             Table = _config!
-        });
+        }, _tokenSource.Token);
         if (eventResult.IsCanceled) {
             _loading = false;
             return;
@@ -240,7 +242,7 @@
             NewPage = page,
             TotalPages = _totalPages,
             Table = _config!
-        });
+        }, _tokenSource.Token);
         if (eventResult.IsCanceled) return;
         page = eventResult.NewPage;
         
@@ -258,7 +260,7 @@
         var eventResult = await PluginOrchestrator.DispatchEvent(new DeleteEntryEvent(this) {
             Entity = element,
             Table = _config!
-        });
+        }, _tokenSource.Token);
         if (eventResult.IsCanceled) return;
         
         var dialog = await Dialogs.ShowConfirmationAsync("Do you really want to delete this entry?");
@@ -289,7 +291,7 @@
             };
         }
         
-        var eventResult = await PluginOrchestrator.DispatchEvent(eventArgs);
+        var eventResult = await PluginOrchestrator.DispatchEvent(eventArgs, _tokenSource.Token);
         if (eventResult.IsCanceled) return;
         
         var panel = await Dialogs.ShowPanelAsync<HopFrameEditor>(new EditorDialogData(_config!, element), new DialogParameters {
@@ -317,7 +319,7 @@
             Entity = item,
             Selected = selected,
             Table = _config!
-        }).Result;
+        }, _tokenSource.Token).Result;
         if (eventResult.IsCanceled) return;
         selected = eventResult.Selected;
         

src/HopFrame.Web/Plugins/IPluginOrchestrator.cs

@@ -1,5 +1,7 @@
-namespace HopFrame.Web.Plugins;
+using HopFrame.Web.Plugins.Events;
+
+namespace HopFrame.Web.Plugins;
 
 public interface IPluginOrchestrator {
-    public Task<TEvent> DispatchEvent<TEvent>(TEvent @event, CancellationToken ct = new());
+    public Task<TEvent> DispatchEvent<TEvent>(TEvent @event, CancellationToken ct = new()) where TEvent : HopFrameEventArgs;
 }

src/HopFrame.Web/Plugins/Internal/PluginOrchestrator.cs

@@ -28,13 +28,25 @@ internal sealed class PluginOrchestrator(IServiceProvider services) : IPluginOrc
         }
     }
 
-    public async Task<TEvent> DispatchEvent<TEvent>(TEvent @event, CancellationToken ct = new()) {
+    public async Task<TEvent> DispatchEvent<TEvent>(TEvent @event, CancellationToken ct = new()) where TEvent : HopFrameEventArgs {
         var eventContainers = services.GetRequiredService<IEnumerable<PluginEventContainer>>()
             .Where(container => container.EventType == typeof(TEvent));
 
+        var eventType = typeof(TEvent);
+        var tokenType = typeof(CancellationToken);
         foreach (var container in eventContainers) {
             var plugin = services.GetRequiredService(container.Handler.DeclaringType!);
-            var result = container.Handler.Invoke(plugin, [@event]);
+            var parameters = new List<object?>();
+
+            foreach (var parameter in container.Handler.GetParameters()) {
+                if (parameter.ParameterType == eventType)
+                    parameters.Add(@event);
+                else if (parameter.ParameterType == tokenType)
+                    parameters.Add(ct);
+                else parameters.Add(null);
+            }
+            
+            var result = container.Handler.Invoke(plugin, parameters.ToArray());
 
             if (container.IsAwaitable)
                 await (Task)result!;