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import util from "../lib/util.ts";
export type CacheControlOptions = {  maxAge?: number;  sMaxAge?: number;  public?: boolean;  private?: boolean;  immutable?: boolean;  mustRevalidate?: boolean;};
export function content(  body: BodyInit,  init?: ResponseInit & {    contentType?: string;    cacheControl?: CacheControlOptions | "immutable" | "no-cache";  },): Response {  const headers = new Headers(init?.headers);
  const contentType = init?.contentType;  if (contentType) {    headers.set("Content-Type", contentType);  }
  const cacheControl = init?.cacheControl;  if (cacheControl) {    if (cacheControl === "no-cache") {      headers.set("Cache-Control", "no-cache, no-store, must-revalidate");    } else if (cacheControl === "immutable") {      headers.set("Cache-Control", "public, max-age=31536000, immutable");    } else {      const { maxAge, sMaxAge, immutable, mustRevalidate } = cacheControl;      headers.set(        "Cache-Control",        [          cacheControl.public && "public",          cacheControl.private && "private",          maxAge && `max-age=${maxAge}`,          sMaxAge && `s-maxage=${sMaxAge}`,          immutable && "immutable",          mustRevalidate && "must-revalidate",        ].filter(Boolean).join(", "),      );    }  }
  return new Response(body, { ...init, headers });}
export function json(data: unknown, init?: ResponseInit): Response {  const headers = new Headers(init?.headers);  headers.append("content-type", "application/json; charset=utf-8");  return new Response(JSON.stringify(data), { ...init, headers });}
export type CookieOptions = {  expires?: number | Date;  maxAge?: number;  domain?: string;  path?: string;  httpOnly?: boolean;  secure?: boolean;  sameSite?: "lax" | "strict" | "none";};
export function setCookieHeader(name: string, value: string, options?: CookieOptions): string {  const cookie = [`${name}=${value}`];  if (options) {    if (options.expires) {      cookie.push(`Expires=${new Date(options.expires).toUTCString()}`);    }    if (options.maxAge) {      cookie.push(`Max-Age=${options.maxAge}`);    }    if (options.domain) {      cookie.push(`Domain=${options.domain}`);    }    if (options.path) {      cookie.push(`Path=${options.path}`);    }    if (options.httpOnly) {      cookie.push("HttpOnly");    }    if (options.secure) {      cookie.push("Secure");    }    if (options.sameSite) {      cookie.push(`SameSite=${options.sameSite}`);    }  }  return cookie.join("; ");}
export function toResponse(v: unknown, headers: Headers): Response {  if (    typeof v === "string" ||    v instanceof ArrayBuffer ||    v instanceof Uint8Array ||    v instanceof ReadableStream  ) {    return new Response(v, { headers: headers });  }  if (v instanceof Blob || v instanceof File) {    headers.set("Content-Type", v.type);    headers.set("Content-Length", v.size.toString());    return new Response(v, { headers: headers });  }  if (util.isPlainObject(v) || Array.isArray(v)) {    return json(v, { headers });  }  if (v === null) {    return new Response(null, { headers });  }  throw new Error("Invalid response type: " + typeof v);}
export function fixResponse(res: Response, addtionHeaders: Headers, fixRedirect: boolean): Response {  if (res.status >= 300 && res.status < 400 && fixRedirect) {    return json({ redirect: { location: res.headers.get("Location"), status: res.status } }, {      status: 501,      headers: addtionHeaders,    });  }  let headers: Headers | null = null;  addtionHeaders.forEach((value, name) => {    if (!headers) {      headers = new Headers(res.headers);    }    headers.set(name, value);  });  if (headers) {    return new Response(res.body, { status: res.status, statusText: res.statusText, headers });  }  return res;}