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import { merge } from "../core/utils/object.ts";
import type { Middleware, RequestHandler } from "../core/server.ts";
export interface Options {  realm: string;  users: Record<string, string>;}
export const defaults: Options = {  realm: "Basic Authentication",  users: {},};
// Code from https://deno.land/x/basic_auth@v1.0.1/mod.tsexport default function BasicAuth(  userOptions?: Partial<Options>,): Middleware {  const options = merge(defaults, userOptions);
  return async (request: Request, next: RequestHandler) => {    const authorization = request.headers.get("authorization");    if (authorization && checkAuthorization(authorization, options.users)) {      return await next(request);    }
    return new Response("401 Unauthorized", {      status: 401,      statusText: "Unauthorized",      headers: {        "www-authenticate": `Basic realm="${options.realm}"`,      },    });  };}
function checkAuthorization(  authorization: string,  users: Record<string, string>,): boolean {  const match = authorization.match(/^Basic\s+(.*)$/);  if (match) {    const [user, pw] = atob(match[1]).split(":");    for (const [u, p] of Object.entries(users)) {      if (user === u && pw == p) {        return true;      }    }  }
  return false;}