<?php

namespace App\Http\Controllers;

use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Redis;

class TestController extends Controller
{
    public function index()
    {
        // 设置库存到redis里  
        //$this->setStock();

        // 抢购  
        //$this->buy();

        /*$strs     = "QWERTYUIOPASDFGHJKLZXCVBNM1234567890qwertyuiopasdfghjklzxcvbnm";
        $userName = substr(str_shuffle($strs), mt_rand(0, strlen($strs) - 11), 10);
        DB::table('test')->insert(['user_name' => $userName]);
        echo $userName;*/ 

    }

    /**
     * 设置库存到redis里
     */ 
    public function setStock()
    {
        // 查询商品信息  
        $goods = DB::table('goods')->where('id', 1)->first();


        $len = Redis::llen('goods_store:1');         // 检查库存,goods_store:1 定义为健名

        $count = $goods->goods_count - $len;            // 实际库存-被抢购的库存 = 剩余可用库存  
        for ($i = 0; $i < $count; $i++) {
            Redis::lpush('goods_store:1', 1);// 往goods_store列表中,未抢购之前这里应该是默认滴push10个库存数了
        }

        //echo \Redis::llen('goods_store:1');//未抢购之前这里就是10了
    }

    /**
     * 模拟抢购
     */ 
    public function buy()
    {
        $strs     = "QWERTYUIOPASDFGHJKLZXCVBNM1234567890qwertyuiopasdfghjklzxcvbnm";
        $userName = substr(str_shuffle($strs), mt_rand(0, strlen($strs) - 11), 10);

        /* 模拟抢购操作,抢购前判断redis队列库存量 */ 
        $count = Redis::lpop('goods_store:1');
        if (!$count) {
            echo '已经抢光了哦';
            exit;
        }

        $result = Redis::lpush('order:1', $userName);
        if ($result) {
            echo '恭喜您!抢到了哦';
        }

    }

}