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import type {  NextFunction,  Opine,  OpineRequest,  OpineResponse,} from "../../src/types.ts";
const create = Object.create;const setPrototypeOf = Object.setPrototypeOf;
/** * Initialization middleware, exposing the * request and response to each other, setting * locals if not defined, as well as defaulting * the X-Powered-By header field. * * @param {Opine} app * @return {Function} init middleware * @private */export const init = function (app: Opine) {  return function opineInit(    req: OpineRequest,    res: OpineResponse,    next: NextFunction,  ) {    if (app.enabled("x-powered-by")) res.set("X-Powered-By", "Opine");
    req.res = res;    res.req = req;    req.next = next;
    setPrototypeOf(req, app.request);    setPrototypeOf(res, app.response);
    // Deno 1.9.0 introduced a change which restricted the interaction with    // the prototype object requiring properties to be manually copied in    // this fashion.    req.app = app.request.app;    res.app = app.response.app;    res.locals = res.locals || create(null);
    next();  };};