make stuff nonstatic

SimpleHttpServer/Types/BaseEndpointCheckAttribute.cs

@@ -2,14 +2,25 @@
 
 namespace SimpleHttpServer.Types;
 
-[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = true)]
-public abstract class BaseEndpointCheckAttribute : Attribute {
-
-    public BaseEndpointCheckAttribute() { }
-
+public abstract class InternalEndpointCheckAttribute : Attribute {
     /// <summary>
     /// Executed when the endpoint is invoked. The endpoint invocation is skipped if any of the checks fail.
     /// </summary>
     /// <returns>True to allow invocation, false to prevent.</returns>
     public abstract bool Check(HttpListenerRequest req);
+    internal abstract void SetInstance(object? instance);
+}
+
+[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = true)]
+public abstract class BaseEndpointCheckAttribute<T> : InternalEndpointCheckAttribute {
+    /// <summary>
+    /// A reference to the instance of the class that this attribute is attached to. 
+    /// Will be null iff an class factory was passed in <see cref="HttpServer.RegisterEndpointsFromType{T}(Func{T}?)"/>.
+    /// </summary>
+    protected internal T? EndpointClassInstance { get; internal set; } = default;
+    public BaseEndpointCheckAttribute() { }
+    internal override void SetInstance(object? instance) {
+        if (instance != null)
+            EndpointClassInstance = (T?) instance;
+    }
 }