plane/silo/src/lib/controller.ts

import { RequestHandler, Router } from "express";

type HttpMethod = "get" | "post" | "put" | "delete" | "patch" | "options" | "head";

export function registerControllers(router: Router, Controller: any) {
  const instance = new Controller();
  const baseRoute = Reflect.getMetadata("baseRoute", Controller) as string;

  Object.getOwnPropertyNames(Controller.prototype).forEach((methodName) => {
    if (methodName === "constructor") return; // Skip the constructor

    const method = Reflect.getMetadata("method", instance, methodName) as HttpMethod;
    const route = Reflect.getMetadata("route", instance, methodName) as string;
    const middlewares = (Reflect.getMetadata("middlewares", instance, methodName) as RequestHandler[]) || [];

    if (method && route) {
      const handler = instance[methodName as keyof typeof instance] as unknown;

      if (typeof handler === "function") {
        (router[method] as (path: string, ...handlers: RequestHandler[]) => void)(
          `${baseRoute}${route}`,
          ...middlewares,
          handler.bind(instance)
        );
      }
    }
  });
}