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

<?php

namespace App\Service\v3\Implementations;

use App\Constants\v3\ErrorCode;
use App\Constants\v3\LogLabel;
use App\Exception\ErrorCodeException;
use App\Model\v3\CouponRec;
use App\Model\v3\CouponUse;
use App\Model\v3\OrderMain;
use App\Service\v3\Interfaces\CouponServiceInterface;
use Hyperf\DbConnection\Db;
use Hyperf\Redis\Redis;
use Hyperf\Utils\ApplicationContext;

class CouponService implements CouponServiceInterface
{

    /**
     * @inheritDoc
     */
    public function do()
    {
        // TODO: Implement do() method.
    }

    /**
     * @inheritDoc
     */
    public function check()
    {
        // TODO: Implement check() method.
    }

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

    /**
     * @inheritDoc
     */
    public function countAvailableByUser($userId)
    {
        return mt_rand(0,10);
    }

    /**
     * 缓存优惠券今日使用情况
     * @param $userId
     * @param $couponId
     * @param $couponRecId
     * @return bool
     */
    function cacheTodayCouponUsed($userId, $couponId, $couponRecId)
    {
        $redis = ApplicationContext::getContainer()->get(Redis::class);
        $setRes = $redis->sAdd('coupon_' . date('Ymd') . '_used_' . $userId, $couponId);
        $expireRes = $redis->expire('coupon_' . date('Ymd') . '_used_' . $userId, strtotime(date('Y-m-d') . ' 23:59:59') - time());
        return $setRes && $expireRes;
    }

    public function orderUseCoupons($orderMainId, $couponRecs)
    {
        Db::beginTransaction();
        try {
            if (is_array($couponRecs)&&!empty($couponRecs)) {
                # 使用记录、更新当前优惠券
                foreach ($couponRecs as $key => &$coupon) {

                    $couponUse = [
                        'user_id' => $coupon['user_id'],
                        'user_receive_id' => $coupon['id'],
                        'coupon_id' => $coupon['coupon_id'],
                        'order_main_id' => $orderMainId,
                        'use_time' => time(),
                        'return_time' => 0,
                        'number' => 1,
                        'status' => 1,
                        'update_time' => 0,
                    ];

                    $insertRes = CouponUse::query()->insert($couponUse);
                    if ($insertRes) {
                        $status = 0;
                        $numberRemain = $coupon['number_remain'] - 1;
                        if ($numberRemain == 0) {
                            $status = 2;
                        } elseif ($numberRemain > 0 && $numberRemain < $coupon['number']) {
                            $status = 1;
                        } elseif ($numberRemain == $coupon['number']) {
                            $status = 0;
                        }

                        $upRes = CouponRec::query()->where(['id' => $coupon['id']])
                            ->update(['number_remain' => $numberRemain, 'status' => $status]);
                        if (!$upRes) {
                            Db::rollBack();
                            throw new ErrorCodeException(ErrorCode::COUPON_USE_FAILURE);
                        }
                        // 缓存使用记录
                        $usedRes = $this->cacheTodayCouponUsed($coupon['user_id'], $coupon['coupon_id'], $coupon['id']);
                        if (!$usedRes) {
                            Db::rollBack();
                            throw new ErrorCodeException(ErrorCode::COUPON_USE_FAILURE);
                        }
                    } else {
                        Db::rollBack();
                        throw new ErrorCodeException(ErrorCode::COUPON_USE_FAILURE);
                    }

                }
            }

            Db::commit();
        } catch (\Exception $e) {
            Db::rollBack();
            throw new ErrorCodeException(ErrorCode::COUPON_USE_FAILURE, $e->getMessage());
        }

    }

    /**
     * 退还优惠券，订单取消，申请退款成功时
     * 先查询是否正常使用优惠券
     * 修改状态，退还领取记录库存,删除ssdb缓存
     * @param $orderMainId
     * @return bool
     */
    public function orderRefundCoupons($orderMainId)
    {
        $currentTime = time();
        Db::beginTransaction();
        try {
            $couponUses = CouponUse::query()
                ->where('order_main_id', $orderMainId)
                ->where('status', 1)
                ->get();
            if (!empty($couponUses)) {
                foreach ($couponUses as $use) {
                    $use->status = 1;
                    $use->return_time = $currentTime;
                    $use->update_time = $currentTime;
                    $res = $use->save();
                    $couponReceive = CouponRec::query()
                        ->where('id', $use->user_receive_id)
                        ->whereRaw('number >= number_remain+' . $use->number)
                        ->update([
                            'number_remain' => Db::raw('number_remain+' . $use->number),
                            'status' => Db::raw('IF(number=number_remain, 0,1)'), 'update_time' => $currentTime
                        ]);

                    if ($res && $couponReceive) {
                        $redis = ApplicationContext::getContainer()->get(Redis::class);
                        $clearUseRedis = $redis->sRem('coupon_' . date('Ymd') . '_used_' . $use->user_id, $use->coupon_id);
                    }
                }
            }
            Db::commit();
            return true;
        } catch (\Exception $e) {
            $this->log->event(LogLabel::COUPON_REFUND_LOG, ['msg' => '订单取消/退款退还优惠券', 'exception' => $e->getMessage()]);
            Db::rollBack();
            return false;
        }
    }
}