@yhiot/utils/lib/randomcode.js

基本工具集

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.genRandomState = exports.genActivateCode = void 0;

/**
 * 生成随机激活码, 10个字符长
 * 算法:
 * 获取以毫秒为单位的时间戳 timestamp = 1544717753370, 目前为13位.
 * 将timestamp转化为字符串,前后各加一个1~9的随机数,得到715447177533708,然后翻转得到807335771744517,并转化为整数
 * 获得字典dict的位数,作为进制转化的进制值,这里是43,可以理解成10进制,16进制的进制.
 * 进制转化获得每一位用字典中字符表示的内容
 * 不足10时,前面用字典的末尾来补充.一般最多补充ty
 * @param {*} timestamp
 */
var genActivateCode = function genActivateCode(timestamp) {
  // 在timestamp前后各加一个1~9之间的数字后倒序生成一个整数,保证这个整数不重复.因为timestamp然不一样.
  if (!timestamp) timestamp = new Date().getTime();
  var randCode1 = parseInt(Math.random() * 100) % 9 + 1;
  var randCode2 = parseInt(Math.random() * 100) % 9 + 1; // let dict = '123456789ABCDEFGHJKMNPRSTUVWXY';

  var dict = '123456789ABCDEFGHJKMNPRSTUVWXYacdefghjmnrty';
  var dictlen = dict.length;
  timestamp = timestamp + '';
  var value = randCode1 + timestamp.substr(-13) + randCode2; // 十进制值字符串,

  value = value.split('').reverse().join('');
  value = parseInt(value, 10);
  var result = '';
  var tmpValue = value;

  while (tmpValue > 0) {
    var cindex = tmpValue % dictlen;
    var tchar = dict.charAt(cindex);
    tmpValue = parseInt(tmpValue / dictlen);
    result = tchar + result;
  }

  var finalResult = (dict + result).substr(-10); // console.log({finalResult, result, value, timestamp});
  // if (finalResult.length != result.length) {
  //     console.log('diff', finalResult.length-result.length, {finalResult, result, value, timestamp});
  // }

  return finalResult;
};
/**
 * 获取9位随机state,用于oauth认证
 * 算法同上.
 * @param {*} timestamp
 */


exports.genActivateCode = genActivateCode;

var genRandomState = function genRandomState(timestamp) {
  // 在timestamp前后各加一个1~9之间的数字后倒序生成一个整数,保证这个整数不重复.因为timestamp然不一样.
  if (!timestamp) timestamp = new Date().getTime();
  var randCode1 = parseInt(Math.random() * 100) % 9 + 1; // let randCode2 = parseInt(Math.random() * 100)%9+1;
  // let dict = '123456789ABCDEFGHJKMNPRSTUVWXY';

  var dict = '1234567890ABCDEFGHIJKLMNOPRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
  var dictlen = dict.length;
  timestamp = timestamp + '';
  var value = randCode1 + timestamp.substr(-13); // 十进制值字符串,

  value = value.split('').reverse().join('');
  value = parseInt(value, 10);
  var result = '';
  var tmpValue = value;

  while (tmpValue > 0) {
    var cindex = tmpValue % dictlen;
    var tchar = dict.charAt(cindex);
    tmpValue = parseInt(tmpValue / dictlen);
    result = tchar + result;
  }

  var finalResult = (dict + result).substr(-8); // console.log({finalResult, result, value, timestamp});
  // if (finalResult.length != result.length) {
  //     console.log('diff', finalResult.length-result.length, {finalResult, result, value, timestamp});
  // }

  return finalResult;
};

exports.genRandomState = genRandomState;