@bureaudouble/routeur@0.1.12

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import type { Route } from "../mod.ts";

type PrintFunc = (str: string, ...rest: string[]) => void;
const colorStatus = (status: number) => {
  const colorEnabled = true;
  if (colorEnabled) {
    switch ((status / 100) | 0) {
      case 5: // red = error
        return `\x1b[31m${status}\x1b[0m`;
      case 4: // yellow = warning
        return `\x1b[33m${status}\x1b[0m`;
      case 3: // cyan = redirect
        return `\x1b[36m${status}\x1b[0m`;
      case 2: // green = success
        return `\x1b[32m${status}\x1b[0m`;
    }
  }
  // Fallback to unsupported status code.
  // E.g.) Bun and Deno supports new Response with 101, but Node.js does not.
  // And those may evolve to accept more status.
  return `${status}`;
};
const log = (
  fn: PrintFunc,
  prefix: string,
  method: string,
  path: string,
  status = 0,
  elapsed?: string,
) => {
  const out = prefix === "<--"
    ? `${prefix} ${method} ${path}`
    : `${prefix} ${method} ${path} ${colorStatus(status)} ${elapsed}`;
  fn(out);
};
const humanize = (times: string[]) => {
  const [delimiter, separator] = [",", "."];
  const orderTimes = times.map((v) =>
    v.replace(/(\d)(?=(\d\d\d)+(?!\d))/g, `$1${delimiter}`)
  );
  return orderTimes.join(separator);
};
const time = (start: number) => {
  const delta = Date.now() - start;
  return humanize([
    delta < 1000 ? `${delta}ms` : `${Math.round(delta / 1000)}s`,
  ]);
};

export const logger: <T>(options?: { log?: PrintFunc }) => Route<T>[] = (
  options,
) => [{
  method: [
    "GET",
    "POST",
    "PUT",
    "DELETE",
    "PATCH",
    "HEAD",
    "OPTIONS",
    "TRACE",
    "CONNECT",
  ],
  pattern: new URLPattern({ pathname: "*" }),
  handler: async ({ next, request }) => {
    const fn = options?.log ?? console.log;
    const { method, url } = request;
    const path = url.slice(url.indexOf("/", 8));
    log(fn, "<--", method, path);
    const start = Date.now();
    const res = await next();
    log(fn, "-->", method, path, res.status, time(start));
    return res;
  },
}];