Request handlers & error response factory!

lib/src/lifecycle/AppClass.ts

@@ -3,6 +3,19 @@ import {DependencyKey} from '../../../di/src/type/DependencyKey.ts'
 import {make} from '../../../di/src/global.ts'
 import Application from '../lifecycle/Application.ts'
 
+export interface Bindable {
+    get_bound_method(method_name: string): (...args: any[]) => any
+}
+
+export function isBindable(what: any): what is Bindable {
+    return (
+        what
+        && typeof what.get_bound_method === 'function'
+        && what.get_bound_method.length === 1
+        && typeof what.get_bound_method('get_bound_method') === 'function'
+    )
+}
+
 export default class AppClass {
     protected static make<T>(target: Instantiable<T>|DependencyKey, ...parameters: any[]) {
         return make(target, ...parameters)
@@ -19,4 +32,16 @@ export default class AppClass {
     protected get app() {
         return make(Application)
     }
+
+    public get_bound_method(method_name: string): (...args: any[]) => any {
+        // @ts-ignore
+        if ( typeof this[method_name] !== 'function' ) {
+            throw new TypeError(`Attempt to get bound method for non-function type: ${method_name}`)
+        }
+
+        return (...args: any[]): any => {
+            // @ts-ignore
+            return this[method_name](...args)
+        }
+    }
 }