/**
 * Copyright (c) 2017-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 * @flow
 * @format
 */

import url from 'url';

export function pathToUri(path: string): string {
  // TODO(ljw): this is not a valid way of constructing URIs.
  // The format is "file://server/absolute%20path" where
  // percent-escaping is to be used inside the path for all unsafe characters.
  // This function fails to work with does-style paths "c:\path",
  // fails to work with UNC-style paths "\\server\path",
  // and fails to escape.
  return 'file://' + path;
}

export function uriToPath(uri: string): string {
  // TODO: this will think that "c:\file.txt" uses the protocol "c",
  // rather than being a local filename. It also fails to recognize the host,
  // e.g. "file://server/path" vs "file://localhost/path" vs "file:///path".
  const components = url.parse(uri);
  // Some filename returned from hhvm does not have protocol.
  if (components.protocol !== 'file:' && components.protocol != null) {
    throw new Error(`unexpected file protocol. Got: ${components.protocol}`);
  }
  return (components.pathname || '') + (components.hash || '');
}