123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159
import { ReactDOMServer } from "./deps.ts";import { handleJSXPage } from "./page.ts";import { response } from "./response.ts";import { handleStaticFile } from "./static.ts";import {  HandlerArgument,  Next,  Route,  SSRHandler,  StringHandler,} from "./types.ts";
export function createHandler(  routes: Array<Route>,  staticUrl: string,  staticFolder: string,  // deno-lint-ignore no-explicit-any  cache: any,  pages: Array<SSRHandler>,) {  return function (req: Request) {    const id = req.method + "-" + req.url;    let handler: HandlerArgument | undefined = undefined;
    if (pages.length > 0) {      return handlePages(cache, id, pages, req, staticUrl, staticFolder);    }
    if (cache[id]) handler = cache[id];    else {      const route = routes.find((route) => {        let pattern: URLPattern | null = new URLPattern({          pathname: route.path,        });        const match = pattern.exec(req.url);        pattern = null;        return (match && (route.method === req.method));      });
      handler = route?.handler;    }
    if (!handler) {      return handleStaticFile(staticUrl, req.url, staticFolder);    }
    cache[id] = handler;    const res = response(req);    const next: Next | undefined = undefined;    const stringHandler = <StringHandler> <unknown> handler;    const result = stringHandler(req, res, next);
    if (isString(result)) {      return new Response(result);    }
    if (isHTML(result)) {      return <Response> <unknown> result;    }
    if (isJSX(result)) {      return render(<JSX.Element> <unknown> result);    }
    const [isJson, object] = isJSON(result);    if (isJson) {      const headers = new Headers();      headers.set("content-type", "application/json");      return new Response(<string> object, { headers });    }
    return handler(req, res, next);  };}
/** * @param cache * @param id * @param pages * @param req * @param staticUrl * @param staticFolder * @returns */function handlePages(  // deno-lint-ignore no-explicit-any  cache: any,  id: string,  pages: Array<SSRHandler>,  req: Request,  staticUrl: string,  staticFolder: string,) {  let page: SSRHandler | undefined = undefined;
  const pageId = "page-" + id;  if (cache[pageId]) {    page = cache[pageId] === "non-page" ? undefined : cache[pageId];  } else {    const p = pages.find((page) => {      let pattern: URLPattern | null = new URLPattern({        pathname: page.path,      });      const match = pattern.exec(req.url);      pattern = null;      return (match);    });    cache[pageId] = p ? p : "non-page";    page = p;  }
  if (!page) {    return handleStaticFile(staticUrl, req.url, staticFolder);  }
  return handleJSXPage(page, req);}
function isString(stringResult: unknown) {  const str = <string> stringResult;  try {    return (str.includes != undefined && str.replaceAll != undefined);  } catch (_error) {    throw new Error(`Handler return void`);  }}
function isHTML(element: unknown) {  return element instanceof Response;}
function isJSON(element: unknown) {  if (element instanceof Promise) return [false, ""];  let stringify;  let str = "";  try {    str = <string> element;    stringify = JSON.stringify(str);    JSON.parse(stringify);  } catch (_err) {    return [false, ""];  }  return [true, stringify];}
function isJSX(element: unknown) {  const el = <JSX.Element> element;  return el.props != undefined && el.type != undefined;}
function render(element: JSX.Element) {  const component = ReactDOMServer.renderToString(element);  return new Response(component, {    headers: {      "content-type": "text/html",    },  });}