检查密码规则

check_password.js

/**
 * 检查密码是否符合规则，如果符合规则返回true
 * @param {string} pwd
 * @return {boolean}
 */
function check(pwd) {
  return (
    notSeries(pwd, "1234567890", 3) &&
    notSeries(pwd, "abcdefghijklmnopqrstuvwxyz", 3) &&
    notSeries(pwd, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", 3) &&
    notSeries(pwd, "qwertyuiop", 3) &&
    notSeries(pwd, "QWERTYUIOP", 3) &&
    notSeries(pwd, "asdfghjkl", 3) &&
    notSeries(pwd, "ASDFGHJKL", 3) &&
    notSeries(pwd, "zxcvbnm", 3) &&
    notSeries(pwd, "ZXCVBNM", 3) &&
    notSeries(pwd, "~!@#$%^&*()_+", 3) &&
    notRepeat(pwd, 3)
  );
}

/**
 * 获取字符串的字符数组
 * @param {string} str
 * @return {array}
 */
function getChars(str) {
  return str.split("").map(c => c.charCodeAt(0));
}

/**
 * 判断是否包含连续字符串，如果不包含返回true
 * @param {string} pwd
 * @param {string} str
 * @param {number} n
 * @return {boolean}
 */
function notSeries(pwd, str, n) {
  const c1 = getChars(pwd);
  const c2 = getChars(str);
  for (let i = 0; i < c1.length - n + 1; i++) {
    const j = c2.indexOf(c1[i]);
    if (j !== -1 && j < str.length - n) {
      let ok = true;
      for (let k = 1; k < n; k++) {
        ok = ok && c1[i + k] === c2[j + k];
      }
      if (ok) return false;
    }
  }
  return true;
}

/**
 * 判断是否包含重复的字符串，如果不包含返回true
 * @param {string} pwd
 * @param {number} n
 */
function notRepeat(pwd, n) {
  const c = getChars(pwd);
  for (let i = 0; i < c.length - n + 1; i++) {
    let ok = true;
    for (let j = 1; j < n; j++) {
      ok = ok && c[i] === c[i + j];
    }
    if (ok) return false;
  }
  return true;
}

/////////////////////////////////////////////////////////////
// 测试
const assert = require("assert");

assert.ok(check("hello, world"));
assert.ok(check("rhu2ihfjsn"));
assert.ok(check("112"));
assert.ok(check("233"));

assert.ok(!check("111"));
assert.ok(!check("safqwert"));
assert.ok(!check("qwasd!@#"));

console.log('测试通过，666');