<?php

namespace app\common\services;

use think\Cache;

class RedisService
{
    protected $redis;

    /**
     * @param int $db Redis数据库编号，默认 0
     */
    public function __construct(int $db = 0)
    {
        $this->redis = Cache::store('redis')->handler();
        $this->redis->select($db);
    }

    public function incrWithExpire(string $key, int $expireSeconds = 86400)
    {
        $val = $this->redis->incr($key);
        if ($val === 1) {
            $this->redis->expire($key, $expireSeconds);
        }
        return $val;
    }
}