<?php
/**
 * 缓存服务
 * @author wesmiler
 */

namespace app\index\service;
use \think\cache\driver\Redis as BaseRedis;
class RedisService
{
    public static $redis = null;
    public static function instance(){
        if(self::$redis){
            return self::$redis;
        }
        $option = config('config.redis');
        $redis = new BaseRedis($option);
        return $redis;
    }
    /**
     * 设置
     * @param $key
     * @param $val
     * @param int $expire
     */
    public static function set($key, $val, $expire=0){
        $expire = $expire? $expire : 0;
        $val = is_array($val)? json_encode($val, 256) : $val;
        self::instance()->set($key, $val, $expire);
    }

    /**
     * 获取
     * @param $key
     * @return bool
     */
    public static function get($key){
        $cacheData = self::instance()->get($key);
        $data = $cacheData? json_decode($cacheData, true) : [];
        if(empty($data)){
            $data = $cacheData;
        }

        return $data;
    }

    /**
     * 删除
     * @param $key
     * @return bool
     */
    public static function del($key){
        return self::instance()->rm($key);
    }

    /**
     * 递增
     * @param $key
     * @return bool
     */
    public static function inc($key, $step=1){
        return self::instance()->inc($key, $step);
    }

    /**
     * 递减
     * @param $key
     * @return bool
     */
    public static function dec($key, $step=1){
        return self::instance()->dec($key, $step);
    }

    /**
     * 批量删除
     * @param $key
     * @return bool
     */
    public static function delByKeys($key){
        return self::instance()->rms($key);
    }

    /**
     * 右入队处理
     * @param $key
     * @param $data
     */
    public static function rpush($key, $data){
        return self::instance()->rpush($key, $data);
    }

    /**
     * 左入出处理
     * @param $key
     */
    public static function lpop($key){
        return self::instance()->lpop($key);
    }

    /**
     * 设置有效时间
     * @param $key
     * @param $expire
     * @return mixed
     */
    public static function expire($key, $expire){
        return self::instance()->expire($key, $expire);
    }

    /**
     * 键名是否存在
     * @param $key
     * @param $expire
     * @return mixed
     */
    public static function exists($key){
        return self::instance()->exists($key);
    }
}