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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import Dir from "./_fs_dir.ts";import { Buffer } from "../buffer.ts";import { getOptions, getValidatedPath } from "../internal/fs/utils.mjs";import { denoErrorToNodeError } from "../internal/errors.ts";import { validateFunction, validateInteger } from "../internal/validators.mjs";import { promisify } from "../internal/util.mjs";
/** These options aren't funcitonally used right now, as `Dir` doesn't yet support them. * However, these values are still validated. */type Options = {  encoding?: string;  bufferSize?: number;};type Callback = (err?: Error | null, dir?: Dir) => void;
function _validateFunction(callback: unknown): asserts callback is Callback {  validateFunction(callback, "callback");}
/** @link https://nodejs.org/api/fs.html#fsopendirsyncpath-options */export function opendir(  path: string | Buffer | URL,  options: Options | Callback,  callback?: Callback,) {  callback = typeof options === "function" ? options : callback;  _validateFunction(callback);
  path = getValidatedPath(path).toString();
  let err, dir;  try {    const { bufferSize } = getOptions(options, {      encoding: "utf8",      bufferSize: 32,    });    validateInteger(bufferSize, "options.bufferSize", 1, 4294967295);
    /** Throws if path is invalid */    Deno.readDirSync(path);
    dir = new Dir(path);  } catch (error) {    err = denoErrorToNodeError(error as Error, { syscall: "opendir" });  }  if (err) {    callback(err);  } else {    callback(null, dir);  }}
/** @link https://nodejs.org/api/fs.html#fspromisesopendirpath-options */export const opendirPromise = promisify(opendir) as (  path: string | Buffer | URL,  options?: Options,) => Promise<Dir>;
export function opendirSync(  path: string | Buffer | URL,  options?: Options,): Dir {  path = getValidatedPath(path).toString();
  const { bufferSize } = getOptions(options, {    encoding: "utf8",    bufferSize: 32,  });
  validateInteger(bufferSize, "options.bufferSize", 1, 4294967295);
  try {    /** Throws if path is invalid */    Deno.readDirSync(path);
    return new Dir(path);  } catch (err) {    throw denoErrorToNodeError(err as Error, { syscall: "opendir" });  }}