用PHP做了一个领取优惠券活动的示例代码(2)

/**
 * Function:用户领取活动
 * Author:cyw0413
 * @param $user_type
 */
public function getCouponSuccess($user_type,$user,$coupon,$mobile)
{
  if(count($coupon) > 0){

    switch ($user_type){
      case 1:
        //新用户领取，如果从来没注册过就要新增用户
        $res = $this->addUser($mobile,$coupon); 
        return [
          'result' => $res,
          'status' => 200
        ];
        break;
      case 2:
        //老用户领取
        $res = $this->insertUserCoupon($user,$coupon);
        return [
          'result' => $res,
          'status' => 200
        ];
        break;
      default:
        //新老用户领取,判断是新用户还是老用户,这里的$user是有无配送单，有则为老用户；
        if(empty($user)){
          $res = $this->addUser($mobile,$coupon);
        }else{

          $res = $this->insertUserCoupon($user,$coupon); //老用户，直接发放优惠券
        }
        return [
          'result' => $res,
          'status' => 200
        ];
        break;
    }
  }else{
    throw new \Exception("优惠券不存在或者已经停用");
  }


}

/**
 * Function:发放优惠券
 * Author:cyw0413
 * @param $user
 * @param $coupon
 */
public function insertUserCoupon($user,$coupon)
{
  $relate = [];
  foreach($coupon as $item){

    $res = CouponConfigSendBaseModel::where([
      'config_id'=>$item['config_id'],
      'status'  => 0,
    ])->first();

    if(empty($res) || (!empty($res) && $res['is_send'] == 0) ){
      throw new \Exception("优惠券未发放,暂不可领取");
    }

    //发放优惠券，有多少张就添加多少张，这里扣除优惠券时，主要用不同的coupon_sn来区别
    $onlyCoupon = $this->getCouponName($item['config_id']);
    if ($onlyCoupon['expire_type'] == 0) {
      $start_time = $onlyCoupon['expire_start_time'];
      $end_time = $onlyCoupon['expire_end_time'];
    } else {
      $start_time = date('Y-m-d H:i:s');
      $end_time = date('Y-m-d H:i:s', time()+86400*$onlyCoupon['expire_type']);
    }

    $result = [
      'user_id'  => $user['user_id'],
      'config_id' => $item['config_id'],
      'name'   => $onlyCoupon['name'],
      'get_type' => $onlyCoupon['get_type'],
      'amount'  => $onlyCoupon['amount'],
      'require_price' => $onlyCoupon['require_price'],
      'status'    => 1,
      'start_time'  => $start_time,
      'end_time'   => $end_time,
    ];
    for($i=0; $i < $item['quantity'];$i++){
      $result['coupon_sn'] = 'B'.mt_rand(1, 10000) . strtoupper(uniqid(mt_rand(1, 10000)));
      $userCoupon = UserCouponBaseModel::create($result);
    }

    //扣除相应的优惠券数量,这里用到了锁表，防止并发时，优惠券为-1
    $couponConfig = CouponConfigBaseModel::where('config_id',$item['config_id'])->lockForUpdate()->first();
    if($couponConfig->left_quantity > 0 ){
      if($couponConfig->left_quantity >= $item['quantity']){
        $couponConfig->left_quantity = $couponConfig->left_quantity-$item['quantity'];
        $couponConfig->save();
      }else{
        throw new \Exception("优惠券剩余数量不够扣减");
      }

    }


    $relate = [
      'coupon_id' => $userCoupon->coupon_id,
      'user_id'  => $user['user_id'],
      'config_id' => $item['config_id'],
      'activity_id' => $item['activity_id']
    ];

    ActivityCouponUserRelateBaseModel::create($relate);

    $relate[] = $this->getUserCouponRate($user['user_id'],$item['activity_id']);


  }

  return $relate;
}