用PHP做了一个领取优惠券活动的示例代码

/** * Function:优惠券领取处理 * Author:cyw0413 * @param $params * @return array * @throws /Exception */public function doCoupon($params){  $activity_id = $params['activity_id'];  if(!$params){    throw new /Exception("参数错误！");  }  $preg_phone = '/^1[34578]/d{9}$/ims';  $is_mobile = preg_match ($preg_phone, $params['mobile']);  if ($is_mobile == 0) {    throw new /Exception("手机号码不正确！");  }  //隐藏手机号码中间4位  $str_mobile = substr_replace($params['mobile'],'****',3,4);  $activity = $this->find($activity_id);  if(empty($activity)){    throw new /Exception("不存在此活动");  }  $activity_link = $activity->activityLink->where('coupon_status',0); //只选择不停用的优惠券  if(count($activity_link) <= 0){    throw new /Exception("优惠券不存在或者已经停用");  }else{    //查找注册用户ID    $showUser = $this->showUser($params['mobile']);    //主要是过滤掉领取优惠券为0的，用laravel的同学注意看看    $detail = $activity_link->each(function($item,$index) use ($showUser) {      $diffCouponQuantity = $this->diffCouponQuantity($item['config_id'],$item['quantity'],$item['activity_id'],$showUser);      $item->title = $this->getCouponName($item['config_id'])['name'];      $item->number = $item['quantity'];      $item->msg  = $diffCouponQuantity ['msg'];      $item->diff   = $diffCouponQuantity ['diff'];      $item->code   = $diffCouponQuantity ['code'];    })->toArray();    if(count($detail) == 1){      foreach($detail as $val){        if($val['diff'] == 1 && $val['code'] == '400'){          throw new /Exception($detail[0]['msg']);        }      }    }    $collection_coupon = collect($detail);    $collection_coupon = $collection_coupon->where('diff', '<=' ,'0');  //去除优惠券剩余数量为0，或者领取优惠券数量-剩余数量 > 0  }  //判断活动开始时间与优惠券开始时间  $act_coupon = ActivityCouponBaseModel::where('activity_id',$activity['activity_id'])->first();  $check_time = $this-> checkCouponTime($act_coupon['start_time'],$activity_link);  if($check_time == 'error'){    throw new /Exception("优惠券领取时间未开始,暂不可领取");  }  //领取活动有以下几种情况  //1: 活动已结束  if($activity['end_time'] < date("Y-m-d H:i:s") || $activity['status'] == 1){    $result = [      'code' => 1,    ];    return $result;  }  //6 活动为开始时  if($activity['start_time'] > date("Y-m-d H:i:s") || $activity['status'] == 1){    $result = [      'code' => 6,    ];    return $result;  }  $checkUser = $this->haveUser($params['mobile']); //检查是新用户，还是老用户 根据自己的业务需求做，这个方法就不贴了  //2: 活动为新用户领取，而领取的用户是老用户  if($activity['user_type'] == 1 && !empty($checkUser)){    $result = [      'code' => 2,    ];    return $result;  }  //3：活动为老用户领取，而领取的用户是新用户  if($activity['user_type']==2 && empty($checkUser)){    $result = [      'code' => 3,    ];    return $result;  }  //4：优惠券是否领取完  $coupon = $this->getCouponExpire($collection_coupon,$params['mobile']); //这里提示有一个优惠券列表，根据自己的业务需求做，这个方法就不贴了  //return $coupon;  if($coupon == 1){    $result = [      'code' => 4,    ];    return $result;  }  //5：已领取过优惠券提示  $userCoupon = '';  $userRate = '';  if(!empty($checkUser)){    //user存在则为老用户，再检查是否领取过    $userCoupon = $this->getUserCoupon($collection_coupon,$checkUser['user_id']);    $userRate = $this->getUserCouponRate($checkUser['user_id'],$activity['activity_id']);  }else{    //新用户，检查是否注册过    $var_user = UserBaseModel::where('user_name',$params['mobile'])->first();    if(!empty($var_user)){      $userCoupon = $this->getUserCoupon($collection_coupon,$var_user['user_id']);      $userRate = $this->getUserCouponRate($var_user['user_id'],$activity['activity_id']);    }  }  //return $userRate;  if($userCoupon == 1){    $result = [      'code' => 5,      'phone'=> $str_mobile,      'coupon' => $userRate,      'is_get' => false,    ];    return $result;  }  //5：领取成功  //如果活动规定是新老用户0，新用户1，老用户2  $getCouponSuccess = $this->getCouponSuccess($activity['user_type'],$checkUser,$collection_coupon,$params['mobile']);  //return $getCouponSuccess;  if($getCouponSuccess['status'] == 200){    $result = [      'code' => 5,      'phone'=> $str_mobile,      'coupon' => $getCouponSuccess['result'][0],      'is_get' => true,    ];    return $result;  }}

/** * 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;}