<?php

namespace app\common\model;

class ShortLink extends BaseModel
{
    protected $name = 'short_link';

    /**
     * @notes 生成唯一随机码
     */
    public static function generateCode(int $length = 8): string
    {
        $chars = 'ABCDEFGHJKLMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz23456789';
        do {
            $code = '';
            for ($i = 0; $i < $length; $i++) {
                $code .= $chars[random_int(0, strlen($chars) - 1)];
            }
        } while (self::where('code', $code)->findOrEmpty()->isExists());
        return $code;
    }

}