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import type { ConnInfo } from "https://deno.land/std@0.136.0/http/server.ts";import util from "../lib/util.ts";import { type CookieOptions, setCookieHeader } from "./response.ts";import type { HTMLRewriterHandlers } from "./html.ts";
type Options = {  connInfo?: ConnInfo;  customHTMLRewriter?: [selector: string, handlers: HTMLRewriterHandlers][];};
export function createContext(req: Request, options?: Options): typeof ctx {  // create the context object  const ctx = {    connInfo: options?.connInfo,    params: {},    headers: new Headers(),    cookies: {      _cookies: null as Map<string, string> | null,      get(name: string) {        if (this._cookies === null) {          this._cookies = new Map<string, string>();          const cookieHeader = req.headers.get("Cookie");          if (cookieHeader) {            for (const cookie of cookieHeader.split(";")) {              const [key, value] = util.splitBy(cookie, "=");              this._cookies.set(key.trim(), value);            }          }        }        return this._cookies.get(name);      },      set(name: string, value: string, options?: CookieOptions) {        this._cookies?.set(name, value);        ctx.headers.set("Set-Cookie", setCookieHeader(name, value, options));      },      delete(name: string, options?: CookieOptions) {        this._cookies?.delete(name);        ctx.headers.set("Set-Cookie", setCookieHeader(name, "", { ...options, expires: new Date(0) }));      },    },    htmlRewriter: {      on: (selector: string, handlers: HTMLRewriterHandlers) => {        options?.customHTMLRewriter?.push([selector, handlers]);      },    },  };
  return ctx;}