<?php

namespace App\Rules;

use Illuminate\Contracts\Validation\Rule;

class IdCardRule implements Rule
{
    protected string $errorMessage = '身份证号码 校验错误';

    /**
     * Notes   : 校验
     *
     * @Date   : 2021/6/23 2:59 下午
     * @Author : <Jason.C>
     * @param  string  $attribute
     * @param  mixed  $value
     * @return bool
     */
    public function passes($attribute, $value): bool
    {
        if (strlen($value) !== 18) {
            $this->errorMessage = '请输入18位身份证号码';
            return false;
        }

        return $this->isIdCard($value);
    }

    private function isIdCard($id): bool
    {
        $id        = strtoupper($id);
        $regx      = "/(^\d{17}([0-9]|X)$)/";
        $arr_split = [];
        if (! preg_match($regx, $id)) {
            return false;
        }

        $regx = "/^(\d{6})+(\d{4})+(\d{2})+(\d{2})+(\d{3})([0-9]|X)$/";
        @preg_match($regx, $id, $arr_split);
        $dtm_birth = $arr_split[2].'/'.$arr_split[3].'/'.$arr_split[4];
        if (! strtotime($dtm_birth)) {
            return false;
        }

        $arr_int = [7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2];
        $arr_ch  = ['1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'];
        $sign    = 0;
        for ($i = 0; $i < 17; $i++) {
            $b    = (int) $id[$i];
            $w    = $arr_int[$i];
            $sign += $b * $w;
        }
        $n       = $sign % 11;
        $val_num = $arr_ch[$n];

        return ! ($val_num !== substr($id, 17, 1));
    }

    /**
     * 获取校验错误信息
     *
     * @return string
     */
    public function message(): string
    {
        return $this->errorMessage;
    }
}