fastman3-dfyjapp-jsbridge/es/version.js

a jsbridge module for dfyj app

/**
 * 末尾补.0
 * @param num 原始值
 * @param n   位数最大的值
 * @returns {*}
 */
var padZero = function padZero(num, n) {
  var len = num.split('.').length;
  while (len < n) {
    num = num + '.0';
    len++;
  }
  return num;
};

/**
 * 获取APP版本号
 * @param _
 * @returns {*}
 */
var getVersion = function getVersion() {
  var groups = navigator.userAgent.toLowerCase().match(/DFYJ\/([\d.]+)/i);
  if (!groups) {
    return undefined;
  } else {
    return groups[1];
  }
};

/**
 * 比较手机系统版本，arg1 > arg2, return 1; arg1 == arg2, return 0; arg1 < arg2, return -1
 * @param compareVersion
 * @returns {number}
 */
var _compareVersion = function _compareVersion(a, b) {
  // 补.0操作
  var _as = a.split('.');
  var _bs = b.split('.');
  var max = Math.max(_as.length, _bs.length);
  a = padZero(a, max);
  b = padZero(b, max);
  var as = a.split('.');
  var bs = b.split('.');
  if (a === b) return 0;
  for (var i = 0; i < as.length; i++) {
    var x = parseInt(as[i]);
    if (!bs[i]) return 1;
    var y = parseInt(bs[i]);
    if (x < y) return -1;
    if (x > y) return 1;
  }
  return -1;
};

/**
 * 比较APP版本，比compareVersion大则返回1，否则返回-1；相等返回0；
 * @param compareVersion
 * @returns {number}
 */
var compareVersion = function compareVersion(v) {
  // 获取当前版本号
  var currentVersion = getVersion();
  if (!currentVersion) {
    return 1;
  } else {
    return _compareVersion(currentVersion, v);
  }
};
export { getVersion, compareVersion, _compareVersion };