shanshanzhong147
d2f9289338
- 新增促销规则/规格促销价/使用记录模型与幂等迁移 - EvaluatePromo 支持 new_user/inactive_user/campaign 规则判定 - purchase/preCreate 接入促销判定：命中促销时跳过百分比折扣 - activate 激活后按 order_no 幂等写入 promo_usage - 订单模型和响应结构新增 promo_rule_id、promo_discount 字段 Co-authored-by: multica-agent <github@multica.ai>
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
package order
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import (
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"context"
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"math"
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commonLogic "github.com/perfect-panel/server/internal/logic/common"
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"github.com/perfect-panel/server/internal/svc"
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"github.com/perfect-panel/server/internal/types"
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)
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type orderPriceResult struct {
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OriginalPrice int64
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PayableBase int64
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DiscountAmount int64
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PromoRuleId int64
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PromoDiscount int64
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PromoPrice int64
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}
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func calculatePurchasePrice(
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ctx context.Context,
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svcCtx *svc.ServiceContext,
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userID int64,
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subscribeID int64,
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unitPrice int64,
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quantity int64,
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discounts []types.SubscribeDiscount,
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eligibleForDiscount bool,
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allowPromo bool,
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) (*orderPriceResult, error) {
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originalPrice := unitPrice * quantity
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result := &orderPriceResult{
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OriginalPrice: originalPrice,
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PayableBase: originalPrice,
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}
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if allowPromo {
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promoResult, err := commonLogic.EvaluatePromo(ctx, svcCtx, userID, subscribeID)
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if err != nil {
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return nil, err
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}
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if promoResult != nil && promoResult.Eligible && promoResult.PromoPrice < unitPrice {
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result.PayableBase = promoResult.PromoPrice * quantity
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result.PromoRuleId = promoResult.RuleID
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result.PromoDiscount = originalPrice - result.PayableBase
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result.PromoPrice = promoResult.PromoPrice
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if result.PromoDiscount < 0 {
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result.PromoDiscount = 0
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}
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return result, nil
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}
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}
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discount := float64(1)
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if len(discounts) > 0 {
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discount = getDiscount(discounts, quantity, eligibleForDiscount)
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}
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result.PayableBase = int64(math.Round(float64(originalPrice) * discount))
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result.DiscountAmount = originalPrice - result.PayableBase
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return result, nil
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}
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