<?php
// 服务层

namespace Common\Service;
use Vendor\Func\Red;

class CartService extends CommonService {
    protected $redis;
    protected $pre_key;
    public function __construct()
    {
        parent::__construct();
        $this->redis = Red::create();
        $this->pre_key = C('USER.CART').C('APPID').':';
    }

    /**
     * 加入购物车，移除购物车，但是不会删除
     * @param $openid
     * @param $sku_id
     * @param int $count
     * @return mixed
     */
    public function add($openid, $sku_id, $count = 1)
    {
        $key = $this->pre_key.$openid;
        // 可增可减
        return $this->redis->hIncrBy($key, $sku_id, $count);
    }

    /**
     * 批量添加
     * @param $openid
     * @param array $data
     * @return mixed
     */
    public function addBatch($openid, array $data)
    {
        $key = $this->pre_key.$openid;
        // 批量执行
        $r = $this->redis->multi(\Redis::PIPELINE);
        foreach ($data as $k => $v) {
            $r = $r->hIncrBy($key, $k, $v);
        }
        return $this->redis->exec();
    }

    /**
     * 删除购物车单个商品
     * @param $openid
     * @param $sku_id
     * @return mixed
     */
    public function delete($openid, $sku_id)
    {
        $key = $this->pre_key.$openid;
        return $this->redis->hdel($key, $sku_id);
    }

    /**
     * 删除购物车多个商品
     * @param $openid
     * @param $sku_ids
     * @return bool
     */
    public function deleteBatch($openid, $sku_ids)
    {
        $key = $this->pre_key.$openid;
        foreach ($sku_ids as $k => $v) {
            $this->redis->hdel($key, $v);
        }

        return true;
    }

    /**
     * 检测商品是否已在购物车中
     * @param $openid
     * @param $sku_id
     * @return mixed
     */
    public function exists($openid, $sku_id)
    {
        $key = $this->pre_key.$openid;
        return $this->redis->hExists($key, $sku_id);
    }

    /**
     * 清空购物车
     * @param $openid
     * @return mixed
     */
    public function deleteAll($openid)
    {
        $key = $this->pre_key.$openid;
        return $this->redis->del($key);
    }

    /**
     * 判断购物车中是否有数据，有多少
     * @param $openid
     * @return mixed
     */
    public function hasUserCart($openid)
    {
        $key = $this->pre_key.$openid;
        return $this->redis->hLen($key);
    }

    /**
     * 设置为固定数量
     * @param $openid
     * @param $sku_id
     * @param $count
     * @return bool
     */
    public function setCount($openid, $sku_id, $count)
    {
        $key = $this->pre_key.$openid;
        $status = $this->redis->hset($key, $sku_id, $count);
        if ((int)$status === -1) {
            return false;
        }
        return true;
    }

    /**
     * 获取购物车中单个商品的数量
     * @param $openid
     * @param $sku_id
     * @return mixed
     */
    public function getCount($openid, $sku_id)
    {
        $key = $this->pre_key.$openid;
        return $this->redis->hget($key, $sku_id);
    }

    /**
     * 获取全部数据
     * @param $openid
     * @return mixed
     */
    public function getAll($openid)
    {
        $key = $this->pre_key.$openid;
        return $this->redis->hgetall($key);
    }

    /**
     * 获取全部商品id
     * @param $openid
     * @return mixed
     */
    public function getAllKeys($openid)
    {
        $key = $this->pre_key.$openid;
        return $this->redis->hkeys($key);
    }

    /**
     * 获取全部商品数量
     * @param $openid
     * @return mixed
     */
    public function getAllVal($openid)
    {
        $key = $this->pre_key.$openid;
        return $this->redis->hvals($key);
    }
}