Added plugin events

src/HopFrame.Web/Plugins/Annotations/EventHandlerAttribute.cs

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+namespace HopFrame.Web.Plugins.Annotations;
+
+[AttributeUsage(AttributeTargets.Method)]
+public class EventHandlerAttribute : Attribute;

src/HopFrame.Web/Plugins/Annotations/PluginConfiguratorAttribute.cs

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+namespace HopFrame.Web.Plugins.Annotations;
+
+/// <summary>
+/// Configures the method as a plugin configurator, so the method gets called, when the plugin is registered.
+/// Only works on static methods
+/// </summary>
+[AttributeUsage(AttributeTargets.Method)]
+public class PluginConfiguratorAttribute : Attribute;

src/HopFrame.Web/Plugins/Events/EntryEvent.cs

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+using HopFrame.Web.Components.Pages;
+
+namespace HopFrame.Web.Plugins.Events;
+
+public sealed class DeleteEntryEvent(HopFrameTablePage sender) : HopFrameTablePageEventArgs(sender) {
+    public required object Entity { get; init; }
+}
+
+public sealed class CreateEntryEvent(HopFrameTablePage sender) : HopFrameTablePageEventArgs(sender);
+
+public sealed class UpdateEntryEvent(HopFrameTablePage sender) : HopFrameTablePageEventArgs(sender) {
+    public required object Entity { get; init; }
+}
+
+public sealed class SelectEntryEvent(HopFrameTablePage sender) : HopFrameTablePageEventArgs(sender) {
+    public required object Entity { get; init; }
+    public required bool Selected { get; set; }
+}

src/HopFrame.Web/Plugins/Events/HopFrameEventArgs.cs

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+using HopFrame.Core.Config;
+using HopFrame.Web.Components.Dialogs;
+using HopFrame.Web.Components.Pages;
+
+namespace HopFrame.Web.Plugins.Events;
+
+public abstract class HopFrameEventArgs(object internalSender) {
+    internal object InternalSender { get; } = internalSender;
+    public bool IsCanceled { get; protected set; }
+    
+    
+    public void SetCancelled(bool canceled) => IsCanceled = canceled;
+}
+
+public abstract class HopFrameEventArgs<TSender>(TSender sender) : HopFrameEventArgs(sender) where TSender : class {
+    public TSender Sender => (TSender)InternalSender;
+}
+
+public abstract class HopFrameTablePageEventArgs(HopFrameTablePage sender)
+    : HopFrameEventArgs<HopFrameTablePage>(sender) {
+    public required TableConfig Table { get; init; }
+}
+
+public abstract class HopFrameEditorEventArgs(HopFrameEditor sender)
+    : HopFrameEventArgs<HopFrameEditor>(sender) {
+    public required TableConfig Table { get; init; }
+}

src/HopFrame.Web/Plugins/Events/PageChangeEvent.cs

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+using HopFrame.Web.Components.Pages;
+
+namespace HopFrame.Web.Plugins.Events;
+
+public sealed class PageChangeEvent(HopFrameTablePage sender) : HopFrameTablePageEventArgs(sender) {
+    public required int CurrentPage { get; init; }
+    public required int TotalPages { get; init; }
+    public required int NewPage { get; set; }
+}

src/HopFrame.Web/Plugins/Events/PluginEventContainer.cs

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+using System.Reflection;
+
+namespace HopFrame.Web.Plugins.Events;
+
+internal sealed class PluginEventContainer {
+    public required MethodInfo Handler { get; init; }
+    public required Type EventType { get; init; }
+    public required bool IsAwaitable { get; init; }
+}

src/HopFrame.Web/Plugins/Events/ReloadEvent.cs

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+using HopFrame.Web.Components.Pages;
+
+namespace HopFrame.Web.Plugins.Events;
+
+public sealed class ReloadEvent(HopFrameTablePage sender) : HopFrameTablePageEventArgs(sender) {
+    
+}

src/HopFrame.Web/Plugins/Events/SearchEvent.cs

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+using HopFrame.Web.Components.Pages;
+
+namespace HopFrame.Web.Plugins.Events;
+
+public sealed class SearchEvent(HopFrameTablePage sender) : HopFrameTablePageEventArgs(sender) {
+    public required string SearchTerm { get; set; }
+}

src/HopFrame.Web/Plugins/Events/ValidationEvent.cs

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+using HopFrame.Core.Config;
+using HopFrame.Web.Components.Dialogs;
+
+namespace HopFrame.Web.Plugins.Events;
+
+public sealed class ValidationEvent(HopFrameEditor sender) : HopFrameEditorEventArgs(sender) {
+    public required IList<string> Errors { get; init; }
+    public required PropertyConfig Property { get; init; }
+}

src/HopFrame.Web/Plugins/HopFramePlugin.cs

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+namespace HopFrame.Web.Plugins;
+
+public abstract class HopFramePlugin {
+
+    
+
+}

src/HopFrame.Web/Plugins/IPluginOrchestrator.cs

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+namespace HopFrame.Web.Plugins;
+
+public interface IPluginOrchestrator {
+    public Task<TEvent> DispatchEvent<TEvent>(TEvent @event, CancellationToken ct = new());
+}

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

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+using HopFrame.Web.Plugins.Annotations;
+using HopFrame.Web.Plugins.Events;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace HopFrame.Web.Plugins.Internal;
+
+internal sealed class PluginOrchestrator(IServiceProvider services) : IPluginOrchestrator {
+
+    public static void RegisterPlugin(IServiceCollection collection, Type plugin) {
+        var methods = plugin.GetMethods()
+            .Where(method => method.GetCustomAttributes(true)
+                .Any(attr => attr is EventHandlerAttribute));
+
+        foreach (var method in methods) {
+            var awaitable = method.ReturnType.IsAssignableFrom(typeof(Task));
+            var eventType = method
+                .GetParameters()
+                .FirstOrDefault(param => param.ParameterType.IsAssignableTo(typeof(HopFrameEventArgs)))?.ParameterType;
+            
+            if (eventType is null) continue;
+            var container = new PluginEventContainer {
+                EventType = eventType,
+                IsAwaitable = awaitable,
+                Handler = method
+            };
+            collection.AddSingleton(container);
+            collection.AddScoped(plugin);
+        }
+    }
+
+    public async Task<TEvent> DispatchEvent<TEvent>(TEvent @event, CancellationToken ct = new()) {
+        var eventContainers = services.GetRequiredService<IEnumerable<PluginEventContainer>>()
+            .Where(container => container.EventType == typeof(TEvent));
+
+        foreach (var container in eventContainers) {
+            var plugin = services.GetRequiredService(container.Handler.DeclaringType!);
+            var result = container.Handler.Invoke(plugin, [@event]);
+
+            if (container.IsAwaitable)
+                await (Task)result!;
+        }
+
+        return @event;
+    }
+    
+}