| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| /** |
| * Get a unique id. |
| */ |
| let nextNodeRef = 1 |
| export function uniqueId () { |
| return (nextNodeRef++).toString() |
| } |
| |
| export function typof (v) { |
| const s = Object.prototype.toString.call(v) |
| return s.substring(8, s.length - 1) |
| } |
| |
| export function bufferToBase64 (buffer) { |
| if (typeof btoa !== 'function') { |
| return '' |
| } |
| const string = Array.prototype.map.call( |
| new Uint8Array(buffer), |
| code => String.fromCharCode(code) |
| ).join('') |
| return btoa(string) // eslint-disable-line no-undef |
| } |
| |
| export function base64ToBuffer (base64) { |
| if (typeof atob !== 'function') { |
| return new ArrayBuffer(0) |
| } |
| const string = atob(base64) // eslint-disable-line no-undef |
| const array = new Uint8Array(string.length) |
| Array.prototype.forEach.call(string, (ch, i) => { |
| array[i] = ch.charCodeAt(0) |
| }) |
| return array.buffer |
| } |
| |
| /** |
| * Detect if the param is falsy or empty |
| * @param {any} any |
| */ |
| export function isEmpty (any) { |
| if (!any || typeof any !== 'object') { |
| return true |
| } |
| |
| for (const key in any) { |
| if (Object.prototype.hasOwnProperty.call(any, key)) { |
| return false |
| } |
| } |
| return true |
| } |