idcard-verify/lib/area_service.js

二代身份证合法性校验

//docs:http://www.stats.gov.cn/tjsj/tjbz/xzqhdm/201504/t20150415_712722.html
var util = require('./util');
var province_city_area_code = require('./province_city_area_code');
var provinces = province_city_area_code.provinces;
var citys = province_city_area_code.citys;
var areas = province_city_area_code.areas;
var undefinedText = "未知";

function _checkCard(idcard) {
  if (!util.isString(idcard) || idcard.length !== 18) {
    return false;
  }
  return true;
}

function _getSexual(idcard) {
  if (!_checkCard(idcard)) {
    return undefinedText;
  }
  var sexualChar = idcard.slice(idcard.length - 2, idcard.length - 1);
  if (isNaN(Number(sexualChar))) {
    return undefinedText;
  }
  if (Number(sexualChar) % 2 === 0) {
    return "女";
  }
  return "男";
}

function _getBirthday(idcard) {
  if (!_checkCard(idcard)) {
    return undefinedText;
  }
  var birthday = idcard.slice(6, 14);
  if (isNaN(Number(birthday))) {
    return undefinedText;
  }
  if (!util.verifyBirthday(birthday)) {
    return undefinedText;
  }
  return Number(birthday);
}
//type,0:province,1:city,2:area
function _getData(idcard, type) {
  if (!_checkCard(idcard)) {
    return "";
  }
  var len = 2,
    obj = provinces;
  switch (type) {
    case 0:
      len = 2;
      obj = provinces;
      break;
    case 1:
      len = 4;
      obj = citys;
      break;
    case 2:
      len = 6;
      obj = areas;
      break;
  }
  var code = idcard.slice(0, len);
  if (isNaN(Number(code))) {
    return "";
  }
  return obj[code] ? obj[code] : "";
}

function _getArea(idcard) {
  return _getData(idcard, 2);
}

function _getCity(idcard) {
  return _getData(idcard, 1);
}

function _getProvince(idcard) {
  return _getData(idcard, 0);
}

function _hitArea(idcard) {
  if (!_checkCard(idcard)) {
    return false;
  }
  var areaCode = idcard.slice(0, 6);
  if (isNaN(Number(areaCode))) {
    return false;
  }
  if (areas[areaCode]) {
    return areas[areaCode];
  }
  areaCode = areaCode.slice(0, 4);
  if (citys[areaCode]) {
    return citys[areaCode];
  }
  areaCode = areaCode.slice(0, 2);
  if (provinces[areaCode]) {
    return provinces[areaCode]
  }
  return false;
}

function hit(idcard) {
  return _hitArea(idcard) ? true : false;
}

function idcardinfo(idcard) {
  if (!hit(idcard)) {
    return util.getDefaultIdcardInfoReturn();
  }
  var info = {
    valid: true,
    gender: _getSexual(idcard),
    birthday: _getBirthday(idcard),
    province: _getProvince(idcard),
    city: _getCity(idcard),
    area: _getArea(idcard),
    cardType: 1,
    cardText: '大陆'
  }
  info.age = getAge(info.birthday);
  switch (idcard.slice(0, 6)) {
    case '710000':
      info.cardType = 2;
      info.cardText = '中国台湾';
      break;
    case '810000':
      info.cardType = 2;
      info.cardText = '中国香港';
      break;
    case '820000':
      info.cardType = 2;
      info.cardText = '中国澳门';
      break;
  }
  var address = "";
  if (util.isObject(info.province)) {
    address += info.province.text;
  }
  if (util.isObject(info.city)) {
    address += info.city.text;
  }
  if (util.isObject(info.area)) {
    address += info.area.text;
  }
  info.address = address;
  return info;
}

function getAge(birthday) {
  var age;
  if (!(util.isString(birthday) || util.isNumber(birthday))) {
    return age;
  }
  birthday = birthday.toString();
  var year = birthday.slice(0, 4);
  var month = birthday.slice(4, 6);
  var date = birthday.slice(6, 8);
  var curDate = new Date();
  try {
    if ((1 + curDate.getMonth() < parseInt(month)) || (1 + curDate.getMonth() === parseInt(month) && curDate.getDate() < parseInt(date))) {
      age = curDate.getFullYear() - parseInt(year) - 1;
    } else {
      age = curDate.getFullYear() - parseInt(year);
    }
  } catch (e) {
    age = 0;
  }
  return isNaN(age) ? 0 : age;
}
module.exports = {
  provinces: provinces,
  citys: citys,
  areas: areas,
  hit: hit,
  idcardinfo: idcardinfo,
  getAge: getAge
};