// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
// This module is browser compatible.

import { encodeWhitespace } from "../_common/to_file_url.ts";
import { isAbsolute } from "./is_absolute.ts";

/**
 * Converts a path string to a file URL.
 *
 * ```ts
 * import { toFileUrl } from "https://deno.land/std@$STD_VERSION/path/posix.ts";
 *
 * toFileUrl("/home/foo"); // new URL("file:///home/foo")
 * ```
 * @param path to convert to file URL
 */
export function toFileUrl(path: string) {
  if (!isAbsolute(path)) {
    throw new TypeError("Must be an absolute path.");
  }

  const url = new URL("file:///");
  url.pathname = encodeWhitespace(
    path.replace(/%/g, "%25").replace(/\\/g, "%5C"),
  );
  return url;
}