isIdCard function

bool isIdCard(String idCard)

Implementation

bool isIdCard(String idCard) {
  if (idCard.isEmpty) {
    print('身份证不能为空');
    return false;
  } else if (!(idCard.length == 15 || idCard.length == 18)) {
    print('身份证必须是15位或者18位');
    return false;
  }
  if (idCard.length == 15 && ((idCard = wrap15To18(idCard)).isEmpty)) {
    return false;
  }
  String ai = "";
  String aiCache = ""; //大写X
  if (idCard.length == 18) {
    ai = idCard.substring(0, 17);
  } else if (idCard.length == 15) {
    ai = idCard.substring(0, 6) + "19" + idCard.substring(6, 15);
  }
  if (!_isDigital(ai)) {
    print('身份证处最后一位必须是纯数字');
    return false;
  }
  String strYear = ai.substring(6, 10); // 年份
  String strMonth = ai.substring(10, 12); // 月份
  String strDay = ai.substring(12, 14); // 月份
  if (_dateRegExp.hasMatch(strYear + "-" + strMonth + "-" + strDay)) {
    print('出生年月日无效');
    return false;
  }
  int yearDelta = int.parse(strYear) - _currentYear;
  //身份证上的年份与当前系统年份差值太大
  //根据需要自定义修改该值
  if (yearDelta.abs() > _YEAR_DELTA) {
    print('年份不对，距离当前年份差量过大');
    return false;
  }
  if (int.parse(strMonth) > 12 || int.parse(strMonth) <= 0) {
    print('月份不对');
    return false;
  }
  if (int.parse(strDay) > 31 || int.parse(strDay) <= 0) {
    print('日期不对');
    return false;
  }
  if (!_getAreaCode().containsKey(ai.substring(0, 2))) {
    print('地区编码错误');
    return false;
  }
  int totalMulAiWi = 0;
  for (int i = 0; i < 17; i++) {
    totalMulAiWi = totalMulAiWi + int.parse(ai.substring(i, i + 1)) * int.parse(_Wi[i]);
  }
  int modValue = totalMulAiWi % 11;
  String strVerifyCode = _ValCodeArr[modValue];
  //兼容大写字母X
  if ("x" == strVerifyCode) {
    aiCache = ai + "X";
  }
  ai = ai + strVerifyCode;
  if (idCard.length == 18) {
    if (!(ai == idCard) && !(aiCache == idCard)) {
      return false;
    }
  } else {
    return true;
  }
  return true;
}