/**
 * Copyright (c) 2013-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.
 *
 * @providesModule DraftOffsetKey
 * @format
 * @flow
 */

'use strict';

import type { DraftOffsetKeyPath } from './DraftOffsetKeyPath';

var KEY_DELIMITER = '-';

var DraftOffsetKey = {
  encode: function (blockKey: string, decoratorKey: number, leafKey: number): string {
    return blockKey + KEY_DELIMITER + decoratorKey + KEY_DELIMITER + leafKey;
  },

  decode: function (offsetKey: string): DraftOffsetKeyPath {
    var [blockKey, decoratorKey, leafKey] = offsetKey.split(KEY_DELIMITER);
    return {
      blockKey,
      decoratorKey: parseInt(decoratorKey, 10),
      leafKey: parseInt(leafKey, 10)
    };
  }
};

module.exports = DraftOffsetKey;