add check context events

Pilz.Net/Api/ApiContextEventArgs.cs

@@ -0,0 +1,8 @@
+using System.Net;
+
+namespace Pilz.Net.Api;
+
+public class ApiContextEventArgs(HttpListenerContext context) : EventArgs
+{
+    public HttpListenerContext Context { get; } = context;
+}

Pilz.Net/Api/ApiServer.cs

@@ -13,6 +13,8 @@ public class ApiServer(string apiUrl) : IApiServer
     protected readonly HttpListener httpListener = new();
 
     public event OnCheckAuthenticationEventHandler? OnCheckAuthentication;
+    public event OnCheckContextEventHandler? OnCheckContext;
+    public event OnCheckContextEventHandler? OnCheckContextCompleted;
 
     protected record PrivateApiResult(ApiResult Original, string? ResultJson);
 
@@ -104,6 +106,7 @@ public class ApiServer(string apiUrl) : IApiServer
             Receive();
 
         // Check context
+        OnCheckContext?.Invoke(this, new(context));
         try
         {
             CheckContext(context);
@@ -114,6 +117,10 @@ public class ApiServer(string apiUrl) : IApiServer
             if (DebugMode)
                 throw;
         }
+        finally
+        {
+            OnCheckContextCompleted?.Invoke(this, new(context));
+        }
 
         // Listen for new request
         if (!AllowMultipleRequests)

Pilz.Net/Api/IApiServer.cs

@@ -5,8 +5,11 @@ namespace Pilz.Net.Api;
 public interface IApiServer
 {
     public delegate void OnCheckAuthenticationEventHandler(object sender, ApiAuthCheckEventArgs e);
+    public delegate void OnCheckContextEventHandler(object sender, ApiContextEventArgs e);
 
     event OnCheckAuthenticationEventHandler? OnCheckAuthentication;
+    event OnCheckContextEventHandler OnCheckContext;
+    event OnCheckContextEventHandler OnCheckContextCompleted;
 
     string ApiUrl { get; }