Add support for middleware

src/http/routing/RouteGroup.ts

@@ -1,8 +1,12 @@
-import {AppClass} from "../../lifecycle/AppClass";
+import {Collection} from "@extollo/util"
+import {AppClass} from "../../lifecycle/AppClass"
+import {RouteHandler} from "./Route"
 
 export class RouteGroup extends AppClass {
     private static currentGroupNesting: RouteGroup[] = []
 
+    protected middlewares: Collection<{ stage: 'pre' | 'post', handler: RouteHandler }> = new Collection<{stage: "pre" | "post"; handler: RouteHandler}>()
+
     public static getCurrentGroupHierarchy(): RouteGroup[] {
         return [...this.currentGroupNesting]
     }
@@ -11,4 +15,26 @@ export class RouteGroup extends AppClass {
         public readonly group: () => void | Promise<void>,
         public readonly prefix: string
     ) { super() }
+
+    pre(middleware: RouteHandler) {
+        this.middlewares.push({
+            stage: 'pre',
+            handler: middleware
+        })
+
+        return this
+    }
+
+    post(middleware: RouteHandler) {
+        this.middlewares.push({
+            stage: 'post',
+            handler: middleware,
+        })
+
+        return this
+    }
+
+    getGroupMiddlewareDefinitions() {
+        return this.middlewares
+    }
 }