128 lines
3.8 KiB
PHP
128 lines
3.8 KiB
PHP
<?php
|
|
|
|
namespace App\Services;
|
|
|
|
use App\Models\ProductSku;
|
|
use App\Models\User;
|
|
use App\Models\UserCoupon;
|
|
use Illuminate\Support\Collection;
|
|
|
|
class CouponService
|
|
{
|
|
/**
|
|
* 根据SKU商品获取可用优惠券
|
|
*
|
|
* @param User $user
|
|
* @param array $skus 至少包含以下内容
|
|
* [
|
|
* ['id', 'category_id', 'sell_price', 'vip_price', 'num']
|
|
* ]
|
|
* @return collection
|
|
*/
|
|
public function availableCouponsToUser(User $user, array $skus): collection
|
|
{
|
|
//获取用户当前所有可用券
|
|
$coupons = $this->userValidCoupons($user);
|
|
|
|
$couponSkus = [];
|
|
$availableCoupons = [];
|
|
|
|
foreach ($coupons as $coupon) {
|
|
if (!isset($couponSkus[$coupon->coupon_id])) {
|
|
foreach ($skus as $sku) {
|
|
//这个商品是否在这个券的可用范围
|
|
if ($this->isAvailableCouponToSku($sku, $coupon)) {
|
|
//按coupon_id 分组商品
|
|
$couponSkus[$coupon->coupon_id][] = $sku;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach ($coupons as $coupon) {
|
|
// 这个券是否有可用的商品
|
|
if (isset($couponSkus[$coupon->coupon_id])) {
|
|
//用户是否是vip
|
|
if ($user->isVip()) {
|
|
$totalAmount = collect($couponSkus[$coupon->coupon_id])->sum(function ($item) {
|
|
return bcmul($item['vip_price'], $item['num']);
|
|
});
|
|
} else {
|
|
$totalAmount = collect($couponSkus[$coupon->coupon_id])->sum(function ($item) {
|
|
return bcmul($item['sell_price'], $item['num']);
|
|
});
|
|
}
|
|
//针对这个券，可用的商品合计价格是否满足使用门槛
|
|
if ($totalAmount >= $coupon->coupon_threshold) {
|
|
$availableCoupons[] = $coupon;
|
|
}
|
|
}
|
|
}
|
|
|
|
return collect($availableCoupons);
|
|
}
|
|
|
|
/**
|
|
* 用户有效的优惠券
|
|
*
|
|
* @param User $user
|
|
* @return collection
|
|
*/
|
|
public function userValidCoupons(User $user): collection
|
|
{
|
|
return UserCoupon::with('ranges')->where([
|
|
'user_id'=>$user->id,
|
|
])->onlyUnuse()->get();
|
|
}
|
|
|
|
/**
|
|
* 这批商品中，这个券是否可用
|
|
*
|
|
* @return boolean
|
|
*/
|
|
protected function isAvailableCouponToSomeSku(collection $skus, UserCoupon $coupon)
|
|
{
|
|
$res = false;
|
|
foreach ($skus as $sku) {
|
|
if ($sku instanceof ProductSku && $this->isAvailableCouponToSku($sku, $coupon)) {
|
|
$res = true;
|
|
break;//提前退出循环
|
|
}
|
|
}
|
|
return $res;
|
|
}
|
|
|
|
/**
|
|
* 这个商品是否可用这个券
|
|
*
|
|
* @param array $productSku ['id', 'category_id', 'sell_price', 'vip_price', 'num']
|
|
* @param Coupon $coupon
|
|
* @return boolean
|
|
*/
|
|
protected function isAvailableCouponToSku($sku, UserCoupon $coupon)
|
|
{
|
|
$res = false;
|
|
if ($coupon->ranges->count() == 0) {//如果没有规则则通用
|
|
return true;
|
|
}
|
|
foreach ($coupon->ranges as $range) {
|
|
switch ($range->type) {
|
|
case 1://指定商品分类
|
|
if (in_array($sku['category_id'], explode(',', $range->ranges))) {
|
|
$res = true;
|
|
}
|
|
break;
|
|
case 2://指定商品IDS
|
|
if (in_array($sku['id'], explode(',', $range->ranges))) {
|
|
$res = true;
|
|
}
|
|
break;
|
|
}
|
|
if ($res) {//如果可用提前跳出循环；
|
|
break;
|
|
}
|
|
}
|
|
return $res;
|
|
}
|
|
}
|