/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow strict-local
 * @emails oncall+draft_js
 */
'use strict';

import type { BlockNodeRecord } from "./BlockNodeRecord";
import type { DraftRange } from "./DraftRange";

const invariant = require("fbjs/lib/invariant");
/**
 * Obtain the start and end positions of the range that has the
 * specified entity applied to it.
 *
 * Entity keys are applied only to contiguous stretches of text, so this
 * method searches for the first instance of the entity key and returns
 * the subsequent range.
 */


function getRangesForDraftEntity(block: BlockNodeRecord, key: string): Array<DraftRange> {
  const ranges = [];
  block.findEntityRanges(c => c.getEntity() === key, (start, end) => {
    ranges.push({
      start,
      end
    });
  });
  invariant(!!ranges.length, 'Entity key not found in this range.');
  return ranges;
}

module.exports = getRangesForDraftEntity;