99 lines
2.7 KiB
PHP
99 lines
2.7 KiB
PHP
<?php
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namespace App\Services;
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use App\Models\ProductSku;
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use App\Models\User;
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use App\Models\UserCoupon;
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use Illuminate\Support\Collection;
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class CouponService
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{
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/**
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* 根据SKU商品ids获取可用优惠券
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*
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* @return collection
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*/
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public function availableCouponsToUser(User $user, collection $skus): collection
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{
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//获取用户当前所有可用券
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$coupons = $this->userCalidCoupons($user);
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//判断券在这批商品中是否可用
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$availableCouponIds = [];
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$availableCoupons = [];
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foreach ($coupons as $coupon) {
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if (in_array($coupon->coupon_id, $availableCouponIds)) {//遇到同样的券ID时直接跳过
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$availableCoupons[] = $coupon;
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} else {
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if ($this->isAvailableCouponToSomeSku($skus, $coupon)) {
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$availableCouponIds[] = $coupon->coupon_id;
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$availableCoupons[] = $coupon;
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}
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}
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}
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return collect($availableCoupons);
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}
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/**
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* 用户有效的优惠券
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*
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* @param User $user
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* @return collection
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*/
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public function userCalidCoupons(User $user): collection
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{
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return UserCoupon::with('ranges')->where([
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'user_id'=>$user->id,
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'status'=>0,
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])->where('use_start_at', '<=', now())->where('use_end_at', '>=', now())->get();
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}
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/**
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* 这批商品中，这个券是否可用
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*
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* @return boolean
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*/
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protected function isAvailableCouponToSomeSku(collection $skus, UserCoupon $coupon)
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{
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$res = false;
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foreach ($skus as $sku) {
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if ($sku instanceof ProductSku && $this->isAvailableCouponToSku($sku, $coupon)) {
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$res = true;
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break;//提前退出循环
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}
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}
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return $res;
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}
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/**
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* 这个商品是否可用这个券
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*
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* @param ProductSku $productSku
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* @param Coupon $coupon
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* @return boolean
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*/
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protected function isAvailableCouponToSku(ProductSku $sku, UserCoupon $coupon)
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{
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$res = false;
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foreach ($coupon->ranges as $range) {
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switch ($range->type) {
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case 1://指定商品分类
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if (in_array($sku->category_id, explode(',', $range->ranges))) {
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$res = true;
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}
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break;
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case 2://指定商品IDS
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if (in_array($sku->id, explode(',', $range->ranges))) {
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$res = true;
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}
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break;
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}
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if ($res) {//如果可用提前跳出循环；
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break;
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}
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}
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return $res;
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}
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}
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