<?php
/**
 * Created by PhpStorm.
 * User: lytian
 * Date: 2019/4/22
 * Time: 21:47
 */

namespace app\common\model;

use app\common\library\Redis;
use app\main\constants\BookConstants;
use think\Model;

class ReferralSlave extends Model
{
    // 表名
    protected $table = 'referral_slave';

    // 自动写入时间戳字段
    protected $autoWriteTimestamp = 'int';

    // 定义时间戳字段名
    protected $createTime = 'createtime';
    protected $updateTime = 'updatetime';

    // 追加属性
    protected $append = [];

    /**
     * 随机获取vip分流链接的id
     * @param $library_id
     * @return int
     */
    public function getReferralId($library_id)
    {
        $redisKey = BookConstants::VIP_REFERRAL_KEY.$library_id;
        $referralId = Redis::instance()->sRandMember($redisKey);
        if (!$referralId){
            $ids = model("ReferralSlave")->where('library_id', 'eq', $library_id)
                ->field('referral_id')
                ->select();
            if (empty($ids)){
                $ids = [];
                $ids['referral_id'] = 0;
            }
            $ids = array_column($ids,'referral_id');
            $referralId = array_rand($ids);
            Redis::instance()->sAddArray($redisKey,$ids);
            Redis::instance()->expire($redisKey,3600);

        }
        return (int)$referralId;
    }

}