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import { Row } from "../types.d.ts";import { contentType, extname, Status, STATUS_TEXT } from "./deps.ts";
export function handleStaticFile(  reqUrl: string,  staticURL: string,  maxAge: number,  cache: Row,) {  const staticID = "static" + reqUrl;  const extID = "ext" + staticID + reqUrl;  let path;  let extName = "";
  if (cache[staticID]) {    path = cache[staticID];  } else {    path = getPathUrl(reqUrl, staticURL);    cache[staticID] = path;  }
  if (cache[extID]) {    extName = cache[extID];  } else {    extName = extname(path);    cache[extID] = extName;  }
  const txtExt = [    ".js",    ".css",    ".html",    ".txt",    ".xml",    ".svg",    ".md",    ".ts",    "",  ];  const r = txtExt.find((val) => val === extName);
  if (r || r === "") {    return handleTextFile(extName, maxAge, path, cache, reqUrl);  }
  return handleNonText(path, maxAge);}
async function handleNonText(  path: string,  maxAge: number,) {  let file;  try {    file = await Deno.open(`.${path}`, { read: true });  } catch (err) {    console.error(err);    return new Response(STATUS_TEXT[Status.NotFound], {      status: Status.NotFound,    });  }
  const ct = contentType(extname(path)) || "application/octet-stream";  return new Response(file.readable, {    headers: {      "Content-Type": ct,      "Cache-Control": `max-age=${maxAge}`,    },  });}
async function handleTextFile(  ext: string,  maxAge: number,  path: string,  cache: Row,  url: string,) {  let text;  const txtID = "txt" + url;
  if (cache[txtID]) {    text = cache[txtID];  } else {    try {      text = await Deno.readTextFile(`.${path}`);      cache[txtID] = text;    } catch {      return handleIndex(path, url, cache);    }  }
  return new Response(text, {    headers: {      "Content-Type": <string> contentType(ext),      "Cache-Control": `max-age=${maxAge}`,    },  });}
async function handleIndex(path: string, url: string, cache: Row) {  let text;  const idxID = "index" + url;
  if (cache[idxID]) {    text = cache[idxID];    if (text === STATUS_TEXT[Status.NotFound]) {      return new Response(text, {        status: Status.NotFound,      });    }  } else {    try {      path = path === "/" ? "" : path;      text = await Deno.readTextFile(`.${path}/index.html`);      cache[idxID] = text;    } catch (err) {      console.error(err);      text = STATUS_TEXT[Status.NotFound];      cache[idxID] = text;      return new Response(text, {        status: Status.NotFound,      });    }  }
  return new Response(text, {    headers: {      "Content-Type": "text/html; charset=utf-8",    },  });}
function getPathUrl(url: string, staticURL: string) {  const res = <RegExpMatchArray> url.match(/^https?:\/\/[^/]+/);  const [baseUrl] = res;  if (staticURL !== "/") {    const p = `${staticURL}/:file*`;    const pattern = new URLPattern(p, baseUrl);    const r = pattern.test(url);    if (!r) return "";  }  return url.substring(baseUrl.length);}