iopa/src/util/guid.ts

API-first, Internet of Things (IoT) stack for Typescript, official implementation of the Internet Open Protocols Alliance (IOPA) reference pattern

/*
 * Internet Open Protocol Abstraction (IOPA)
 * Copyright (c) 2016-2022 Internet Open Protocols Alliance
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/** Create a new guid */
export default function guid(): string {
  return `${s4() + s4()}-${s4()}-${s4()}-${s4()}-${s4()}${s4()}${s4()}`
}

/** Helper function to create a new 4 character ID (random) */
function s4(): string {
  return Math.floor((1 + Math.random()) * 0x10000)
    .toString(16)
    .substring(1)
}