php+redis盲盒活动

这里实现最基础的功能，获取盲盒直接掉接口就可以获取

controller层代码

 //获取盲盒操作
    public function getBlindBox()
    {
        $data = $this->input->post();
        if (empty($data['uid']) || empty($data['num'])){
            fail(400,'缺少参数!');
        }
        $this->Activity_service->getBlindBox($data['uid'],$data['num']);
    }

    //开启盲盒操作
    public function openBlindBox()
    {
        $data = $this->input->post();
        if (empty($data['uid']) || empty($data['num'])) {
            fail(400, '参数错误!');
        }
        $this->Activity_service->openBlindBox($data['uid'], $data['num']);
    }

service层代码

	//获取盲盒操作
    public function getBlindBox($uid, $num)
    {
        $key = $uid."_BlindBoxNum";
        $res = $this->conn->incrBy($key, $num);
        if ($res) {
            $data=[
                'uid' => $uid,
                'num' => $num,
            ];
            success($data);
        }
    }

    //开启盲盒操作
    public function openBlindBox($uid, $num)
    {
        if ($num <= 0) {
            fail(400, '开启盲盒数量错误');
        }
        //获取我的盲盒数量
        $key = $uid . "_BlindBoxNum";
        $boxNum = $this->conn->get($key);
        if ($boxNum < $num) {
            fail(400, '盲盒数量不够');
        }
        //锁
        $lockKey = $uid . "_openBlindBoxLock";
        if (!$this->conn->setNxExpire($lockKey, 1, 3)) {
            fail(400, '系统繁忙，稍后重试');
        }
        //扣除盲盒数量
        $this->conn->incrBy($key, -$num);
        //开启盲盒获得的字符奖励
        $charList = $this->blindBox($num);
        //将字符增加到我的字符集中
        $myCharKey = $uid . '_charNum';
        foreach ($charList as $k => $v) {
            //将奖信息存储起来
            $this->conn->hIncrBy($myCharKey, $k, $v);
        }
        success($charList);
    }

	//抽取盲盒获取获得的字符数量数组
    public function blindBox($num)
    {
        //盲盒的全部字符获取概率
        $rate = [
            0 => 333,   //字符W 概率333/1000
            1 => 333,   //字符Y	概率333/1000
            2 => 222,   //字符Q 概率222/1000
            3 => 111,   //字符G	概率111/1000
            4 => 1,     //幸运大奖 概率1/1000
        ];
        $res = [];
        for ($i = 0; $i < $num; $i++) {
            //调用公共函数通过概率获取本次中奖的字符
            $index = rateGetAward($rate);
            //每种字符中奖的个数
            $res[$index] += 1;
        }
        return $res;
    }

公共函数代码

通过概率得到本次抽中的物品

//计算概率 [$index=>$rate] $rate为概率，$index,返回中奖的物品
if (!function_exists('rateGetAward')){
    function rateGetAward($data)
    {
        //概率总和
        $sum = array_sum($data);
        //随机的1到概率总和
        $index = rand(1, $sum);
        //区间左
        $min = 1;
        foreach ($data as $k => $v) {
            //区间右为区间左加上当前$k的$v
            $max = $min + $v;
            //在该区间中则中奖
            if ($index >= $min && $index < $max) {
                return $k;
            }
            //区间右变区间左
            $min = $max;
        }
    }
}

数据返回

获得盲盒

{
    "code": 200,
    "msg": "success",
    "data": {
        "uid": "1",	//用户id
        "num": "100" //本次增加的盲盒个数
    }
}

开启盲盒

{
    "code": 200,
    "msg": "success",
    "data": {
        "1": 34,	//Y字符获取的个数
        "3": 10,	//G字符获取的个数
        "2": 26,	//Q字符获取的个数
        "0": 30		//W字符获取的个数
    }
}