lanzu_api_2021-12-26/app/Service/v3/Implementations/GoodsService.php

<?php

namespace App\Service\v3\Implementations;

use App\Constants\v3\ErrorCode;
use App\Exception\ErrorCodeException;
use App\Service\v3\Interfaces\GoodsServiceInterface;
use Hyperf\DbConnection\Db;
use App\Model\v3\Goods;
use App\Model\v3\GoodsBanner;
use App\Constants\v3\Store;
use App\Constants\v3\goods as goodsConstants;
use Hyperf\Redis\Redis;
use Hyperf\Utils\ApplicationContext;

class GoodsService implements GoodsServiceInterface
{
    public function do($goodsId)
    {

    }

    public function check(Goods $goods,$num = 1)
    {

        $redis = ApplicationContext::getContainer()->get(Redis::class);
        $inventoryKey = 'goods_inventory_sold_1_'.$goods->id; // 拼接activity_type和goods_id

        if (empty($goods)) {
            return ErrorCode::GOODS_NOT_EXISTS;
        }

        // 商户歇业
        if($goods->store->is_rest == 1){
            return ErrorCode::STORE_REST;
        }
        // 商品下架或已删除
        if($goods->on_sale == 0 || !is_null($goods->deleted_at)){
            return ErrorCode::GOODS_ON_SALE_NO;
        }
        // 商品库存不足
        // 获取冻结的库存
        //$inventoryFrozen = (int)$redis->get($inventoryKey);
        $inventoryFrozen = 0;
        if($goods->is_infinite != 1 && $goods->inventory < ($num+$inventoryFrozen)){
            return ErrorCode::GOODS_INVENTORY_ERROR;
        }
        // 压redis库存
        // redis记录当前商品的购买数量，压库存，下单失败、下单成功扣库存成功、订单取消的时候释放
        if (!$redis->exists($inventoryKey)) {
            $redis->set($inventoryKey, $num);
        } else {
            $redis->incrBy($inventoryKey, intval($num));
        }

        // 是否超过限购数量
        if ($goods->restrict_num != 0 && $goods->restrict_num < $num) {
            return ErrorCode::GOODS_RESTRICT_LIMIT;
        }

        return true;
    }

    public function undo()
    {
        // TODO: Implement undo() method.
    }

    public function getBanner($goodsId)
    {
        $banner = GoodsBanner::query()->where('goods_id',$goodsId)->orderByDesc('type')->get();
        return $banner;
    }

    public function detail($goodsId)
    {
        $res = Goods::query()->with('store')->where('id',$goodsId)->first();
        return $res;
    }
}