src/legacy/store/generateClientID.js
/**
* 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 generateClientID
* @typechecks
*/
'use strict';
const crc32 = require('crc32');
const performanceNow = require('performanceNow');
let _clientID = 1;
const _prefix = 'client:' + crc32('' + performanceNow());
/**
* Generate a unique clientID for GraphQL data objects that do not already have
* an ID or their ID = null
*
* @internal
*/
function generateClientID() {
return _prefix + _clientID++;
}
module.exports = generateClientID;