x

internal/logic/public/order/purchaseLogic.go

@@ -153,32 +153,18 @@ func (l *PurchaseLogic) Purchase(req *types.PurchaseOrderRequest) (resp *types.P
 		return nil, errors.Wrapf(xerr.NewErrCode(xerr.SubscribeOutOfStock), "subscribe out of stock")
 	}
 
-	var discount float64 = 1
-	isNewUserForDiscount := time.Since(u.CreatedAt) <= 24*time.Hour
-	if isNewUserForDiscount && sub.Discount != "" {
-		// If the matched tier is new_user_only, check whether the user has already purchased this plan.
-		// If so, they are not eligible for the new-user discount (but the order is still allowed).
-		var dis []types.SubscribeDiscount
-		_ = json.Unmarshal([]byte(sub.Discount), &dis)
-		if isNewUserOnlyForQuantity(dis, req.Quantity) {
-			var historyCount int64
-			if e := l.svcCtx.DB.Model(&order.Order{}).
-				Where("user_id = ? AND subscribe_id = ? AND type = 1 AND status IN ?",
-					u.Id, targetSubscribeID, []int{2, 5}).
-				Count(&historyCount).Error; e != nil {
-				l.Errorw("[Purchase] Database query error checking new user discount eligibility",
-					logger.Field("error", e.Error()), logger.Field("user_id", u.Id))
-				return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "check new user discount history error: %v", e.Error())
-			}
-			if historyCount >= 1 {
-				isNewUserForDiscount = false
-			}
-		}
+	newUserDiscount, err := resolveNewUserDiscountEligibility(l.ctx, l.svcCtx.DB, u.Id, targetSubscribeID, req.Quantity, sub.Discount)
+	if err != nil {
+		l.Errorw("[Purchase] Database query error resolving new user eligibility",
+			logger.Field("error", err.Error()),
+			logger.Field("user_id", u.Id),
+		)
+		return nil, err
 	}
-	if sub.Discount != "" {
-		var dis []types.SubscribeDiscount
-		_ = json.Unmarshal([]byte(sub.Discount), &dis)
-		discount = getDiscount(dis, req.Quantity, isNewUserForDiscount)
+
+	var discount float64 = 1
+	if len(newUserDiscount.Discounts) > 0 {
+		discount = getDiscount(newUserDiscount.Discounts, req.Quantity, newUserDiscount.EligibleForDiscount)
 	}
 	price := sub.UnitPrice * req.Quantity
 	// discount amount
@@ -272,23 +258,23 @@ func (l *PurchaseLogic) Purchase(req *types.PurchaseOrderRequest) (resp *types.P
 		UserId:             u.Id,
 		SubscriptionUserId: entitlement.EffectiveUserID,
 		ParentId:           parentOrderID,
-		OrderNo:        tool.GenerateTradeNo(),
-		Type:           orderType,
-		Quantity:       req.Quantity,
-		Price:          price,
-		Amount:         amount,
-		Discount:       discountAmount,
-		GiftAmount:     deductionAmount,
-		Coupon:         req.Coupon,
-		CouponDiscount: coupon,
-		PaymentId:      payment.Id,
-		Method:         canonicalOrderMethod(payment.Platform),
-		FeeAmount:      feeAmount,
-		Status:         1,
-		IsNew:          isNew,
-		SubscribeId:     targetSubscribeID,
-		SubscribeToken:  subscribeToken,
-		AppAccountToken: uuid.New().String(),
+		OrderNo:            tool.GenerateTradeNo(),
+		Type:               orderType,
+		Quantity:           req.Quantity,
+		Price:              price,
+		Amount:             amount,
+		Discount:           discountAmount,
+		GiftAmount:         deductionAmount,
+		Coupon:             req.Coupon,
+		CouponDiscount:     coupon,
+		PaymentId:          payment.Id,
+		Method:             canonicalOrderMethod(payment.Platform),
+		FeeAmount:          feeAmount,
+		Status:             1,
+		IsNew:              isNew,
+		SubscribeId:        targetSubscribeID,
+		SubscribeToken:     subscribeToken,
+		AppAccountToken:    uuid.New().String(),
 	}
 	if isSingleModeRenewal {
 		l.Infow("[Purchase] single mode purchase order created as renewal",
@@ -320,20 +306,21 @@ func (l *PurchaseLogic) Purchase(req *types.PurchaseOrderRequest) (resp *types.P
 			}
 		}
 
-		// check new user only restriction inside transaction to prevent race condition (tier-level only)
-		// Only block users who registered more than 24h ago; users within 24h who already purchased
-		// are allowed to place another order (they just won't receive the new-user discount).
-		if orderInfo.Type == 1 {
-			var txNewUserOnly bool
-			if sub.Discount != "" {
-				var dis []types.SubscribeDiscount
-				_ = json.Unmarshal([]byte(sub.Discount), &dis)
-				txNewUserOnly = isNewUserOnlyForQuantity(dis, orderInfo.Quantity)
+		// Re-check new-user-only restriction inside the transaction to prevent race conditions.
+		if orderInfo.Type == 1 && newUserDiscount.NewUserOnly {
+			txNewUserDiscount, txErr := resolveNewUserDiscountEligibility(
+				l.ctx,
+				db,
+				u.Id,
+				targetSubscribeID,
+				orderInfo.Quantity,
+				sub.Discount,
+			)
+			if txErr != nil {
+				return txErr
 			}
-			if txNewUserOnly {
-				if time.Since(u.CreatedAt) > 24*time.Hour {
-					return errors.Wrapf(xerr.NewErrCode(xerr.SubscribeNewUserOnly), "not a new user")
-				}
+			if !txNewUserDiscount.WithinWindow {
+				return errors.Wrapf(xerr.NewErrCode(xerr.SubscribeNewUserOnly), "not a new user")
 			}
 		}