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@@ -12,8 +12,11 @@ declare (strict_types=1);
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namespace app\api\service\coupon;
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+use app\common\enum\coupon\ApplyRange as ApplyRangeEnum;
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+use app\common\enum\coupon\CouponType as CouponTypeEnum;
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use app\common\service\BaseService;
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use app\common\library\helper;
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+use cores\exception\BaseException;
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/**
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* 订单优惠券折扣服务类
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@@ -22,30 +25,104 @@ use app\common\library\helper;
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*/
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class GoodsDeduct extends BaseService
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{
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+ // 实际抵扣金额
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private $actualReducedMoney;
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- public function setGoodsCouponMoney($goodsList, $reducedMoney)
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+ // 订单商品列表
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+ private $goodsList = [];
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+
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+ // 优惠券信息
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+ private $couponInfo = [];
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+
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+ // 实际参与优惠券折扣的商品记录
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+ private $rangeGoodsList = [];
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+
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+ // 设置订单商品列表
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+ public function setGoodsList(iterable $goodsList): GoodsDeduct
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{
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- // 统计订单商品总金额,(单位分)
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- $orderTotalPrice = 0;
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- foreach ($goodsList as &$goods) {
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- $goods['total_price'] *= 100;
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- $orderTotalPrice += $goods['total_price'];
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- }
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- // 计算实际抵扣金额
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- $this->setActualReducedMoney($reducedMoney, $orderTotalPrice);
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- // 实际抵扣金额为0，
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+ $this->goodsList = $goodsList;
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+ return $this;
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+ }
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+
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+ // 设置优惠券信息
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+ public function setCouponInfo(array $couponInfo): GoodsDeduct
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+ {
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+ $this->couponInfo = $couponInfo;
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+ return $this;
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+ }
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+
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+ /**
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+ * 计算优惠券抵扣金额
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+ * @return GoodsDeduct
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+ * @throws BaseException
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+ */
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+ public function setGoodsCouponMoney(): GoodsDeduct
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+ {
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+ // 验证当前类属性
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+ $this->checkAttribute();
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+ // 设置实际参与优惠券折扣的商品记录
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+ $this->setRangeGoodsList();
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+ // 计算实际抵扣的金额
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+ $this->setActualReducedMoney();
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+ // 实际抵扣金额为0
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if ($this->actualReducedMoney > 0) {
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// 计算商品的价格权重
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- $goodsList = $this->getGoodsListWeight($goodsList, $orderTotalPrice);
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+ $this->setGoodsListWeight();
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// 计算商品优惠券抵扣金额
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- $this->setGoodsListCouponMoney($goodsList);
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- // 总抵扣金额
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- $totalCouponMoney = helper::getArrayColumnSum($goodsList, 'coupon_money');
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- $this->setGoodsListCouponMoneyFill($goodsList, $totalCouponMoney);
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- $this->setGoodsListCouponMoneyDiff($goodsList, $totalCouponMoney);
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+ $this->setGoodsListCouponMoney();
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+ // 总抵扣金额 (已分配的)
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+ $assignedCouponMoney = helper::getArrayColumnSum($this->rangeGoodsList, 'coupon_money');
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+ // 分配剩余的抵扣金额
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+ $this->setGoodsListCouponMoneyFill($assignedCouponMoney);
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+ $this->setGoodsListCouponMoneyDiff($assignedCouponMoney);
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+ }
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+ return $this;
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+ }
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+
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+ // 获取实际参与优惠券折扣的商品记录
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+ public function getRangeGoodsList(): array
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+ {
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+ return $this->rangeGoodsList;
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+ }
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+
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+ /**
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+ * 设置实际参与优惠券折扣的商品记录
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+ * @return void
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+ */
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+ private function setRangeGoodsList()
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+ {
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+ $this->rangeGoodsList = [];
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+ foreach ($this->goodsList as $goods) {
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+ $goods['total_price'] *= 100;
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+ switch ($this->couponInfo['apply_range']) {
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+ case ApplyRangeEnum::ALL:
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+ $this->rangeGoodsList[$goods['goods_id']] = $goods;
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+ break;
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+ case ApplyRangeEnum::SOME:
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+ if (in_array($goods['goods_id'], $this->couponInfo['apply_range_config']['applyGoodsIds'])) {
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+ $this->rangeGoodsList[$goods['goods_id']] = $goods;
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+ }
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+ break;
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+ case ApplyRangeEnum::EXCLUDE:
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+ if (!in_array($goods['goods_id'], $this->couponInfo['apply_range_config']['excludedGoodsIds'])) {
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+ $this->rangeGoodsList[$goods['goods_id']] = $goods;
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+ }
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+ break;
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+ default:
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+ break;
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+ }
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+ }
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+ }
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+
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+ /**
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+ * 验证当前类属性
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+ * @throws BaseException
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+ */
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+ private function checkAttribute()
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+ {
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+ if (empty($this->goodsList) || empty($this->couponInfo)) {
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+ throwError('goodsList or couponInfo not found.');
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}
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- return $goodsList;
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}
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public function getActualReducedMoney()
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@@ -53,54 +130,81 @@ class GoodsDeduct extends BaseService
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return $this->actualReducedMoney;
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}
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- private function setActualReducedMoney($reducedMoney, $orderTotalPrice)
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+ /**
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+ * 计算实际抵扣的金额
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+ */
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+ private function setActualReducedMoney()
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{
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- $reducedMoney *= 100;
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- $this->actualReducedMoney = ($reducedMoney >= $orderTotalPrice) ? $orderTotalPrice - 1 : $reducedMoney;
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+ // 获取当前订单商品总额
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+ $orderTotalPrice = $this->getOrderTotalPrice();
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+ // 计算最大抵扣金额
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+ $reducedMoney = 0;
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+ foreach ($this->rangeGoodsList as $goods) {
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+ $reducedMoney += $goods['total_price'];
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+ }
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+ // 计算打折金额
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+ if ($this->couponInfo['coupon_type'] == CouponTypeEnum::DISCOUNT) {
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+ $reducePrice = $reducedMoney - ($reducedMoney * ($this->couponInfo['discount'] / 10));
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+ } else {
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+ $reducePrice = $this->couponInfo['reduce_price'];
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+ }
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+ // 优惠券最大允许抵扣到一分钱，所以此处判断抵扣金额大于等于订单金额时，减去一分钱
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+ $this->actualReducedMoney = ($reducePrice >= $orderTotalPrice) ? $orderTotalPrice - 1 : $reducePrice;
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}
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- private function arraySortByWeight($goodsList)
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+ /**
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+ * 获取当前订单商品总额
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+ * @return float|int
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+ */
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+ private function getOrderTotalPrice()
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{
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- return array_sort($goodsList, 'weight', true);
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+ $orderTotalPrice = 0;
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+ foreach ($this->goodsList as $goods) {
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+ $orderTotalPrice += ($goods['total_price'] * 100);
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+ }
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+ return $orderTotalPrice;
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}
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- private function getGoodsListWeight($goodsList, $orderTotalPrice)
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+ /**
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+ * 计算商品抵扣的权重(占比)
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+ */
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+ private function setGoodsListWeight()
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{
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- foreach ($goodsList as &$goods) {
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+ $orderTotalPrice = helper::getArrayColumnSum($this->rangeGoodsList, 'total_price');
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+ foreach ($this->rangeGoodsList as &$goods) {
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$goods['weight'] = $goods['total_price'] / $orderTotalPrice;
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}
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- return $this->arraySortByWeight($goodsList);
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+ array_sort($this->rangeGoodsList, 'weight', true);
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}
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- private function setGoodsListCouponMoney(&$goodsList)
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+ /**
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+ * 计算商品抵扣的金额
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+ */
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+ private function setGoodsListCouponMoney(): void
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{
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- foreach ($goodsList as &$goods) {
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+ foreach ($this->rangeGoodsList as &$goods) {
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$goods['coupon_money'] = helper::bcmul($this->actualReducedMoney, $goods['weight'], 0);
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}
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- return true;
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}
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- private function setGoodsListCouponMoneyFill(&$goodsList, $totalCouponMoney)
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+ private function setGoodsListCouponMoneyFill($assignedCouponMoney): void
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{
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- if ($totalCouponMoney === 0) {
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+ if ($assignedCouponMoney === 0) {
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$temReducedMoney = $this->actualReducedMoney;
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- foreach ($goodsList as &$goods) {
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+ foreach ($this->rangeGoodsList as &$goods) {
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if ($temReducedMoney === 0) break;
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$goods['coupon_money'] = 1;
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$temReducedMoney--;
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}
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}
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- return true;
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}
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- private function setGoodsListCouponMoneyDiff(&$goodsList, $totalCouponMoney)
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+ private function setGoodsListCouponMoneyDiff($assignedCouponMoney): void
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{
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- $tempDiff = $this->actualReducedMoney - $totalCouponMoney;
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- foreach ($goodsList as &$goods) {
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+ $tempDiff = $this->actualReducedMoney - $assignedCouponMoney;
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+ foreach ($this->rangeGoodsList as &$goods) {
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if ($tempDiff < 1) break;
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$goods['coupon_money']++ && $tempDiff--;
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}
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- return true;
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}
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-
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}
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