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;
}