优化结构

app/system/internal/biz/payment.go

@@ -493,6 +493,30 @@ func (uc *PaymentUsecase) Refund(ctx context.Context, provider, tradeNo string,
 	return uc.refundWithOrder(ctx, provider, tradeNo, amount)
 }
 
+// Fulfill retries delivery for an already-paid order. It is intentionally
+// idempotent: the repository lease prevents concurrent attempts and a
+// succeeded order is returned as a duplicate without invoking the handler.
+func (uc *PaymentUsecase) Fulfill(ctx context.Context, provider, tradeNo string) (*PaymentResult, error) {
+	if !validPaymentText(provider, 64) || !validPaymentText(tradeNo, 128) {
+		return nil, errors.New("发货参数不完整")
+	}
+	if uc.orders == nil {
+		return nil, errors.New("支付订单仓储未接入")
+	}
+	order, err := uc.orders.FindPaymentOrder(ctx, provider, tradeNo)
+	if err != nil {
+		return nil, err
+	}
+	result := paymentResultFromOrder(order)
+	if result == nil {
+		return nil, ErrPaymentOrderNotFound
+	}
+	if order.PaymentStatus != PaymentStatusPaid {
+		return nil, ErrPaymentOrderState
+	}
+	return uc.fulfillOrder(ctx, order, result)
+}
+
 // Callback verifies the notification in the adapter, then always performs a
 // provider-side query before it can dispatch fulfillment. Callback payloads
 // are never trusted for amount, currency, or final payment state.
@@ -671,10 +695,21 @@ func (uc *PaymentUsecase) reconcilePaymentResult(ctx context.Context, result, ca
 		return result, nil
 	}
 
+	fulfilled, err := uc.fulfillOrder(ctx, order, result)
+	if err != nil {
+		return fail(err)
+	}
+	return fulfilled, nil
+}
+
+func (uc *PaymentUsecase) fulfillOrder(ctx context.Context, order *PaymentOrder, result *PaymentResult) (*PaymentResult, error) {
+	if order == nil || result == nil {
+		return nil, errors.New("支付发货订单为空")
+	}
 	order, token, duplicate, err := uc.orders.BeginPaymentFulfillment(ctx, result.Provider, result.TradeNo, 10*time.Minute)
 	if err != nil {
 		uc.logger.Error(ctx, "payment.order.fulfillment_begin_failed", "provider", result.Provider, "trade_no", result.TradeNo, "error", err)
-		return fail(err)
+		return nil, err
 	}
 	if duplicate {
 		result.Duplicate = true
@@ -685,29 +720,23 @@ func (uc *PaymentUsecase) reconcilePaymentResult(ctx context.Context, result, ca
 	if handler == nil {
 		err = fmt.Errorf("支付发货 handler 未注册: %s", order.BusinessType)
 		_, _ = uc.orders.CompletePaymentFulfillment(ctx, result.Provider, result.TradeNo, token, false, err.Error())
-		uc.logger.Error(ctx, "payment.order.fulfillment_handler_missing", "provider", result.Provider, "trade_no", result.TradeNo, "business_type", order.BusinessType, "error", err)
-		return fail(err)
+		return nil, err
 	}
-	confirmation := &PaymentConfirmation{
-		ID: order.ConfirmationID, Provider: order.Provider, TradeNo: order.TradeNo,
-		ProviderTradeNo: result.ProviderTradeNo, BusinessType: order.BusinessType,
-		BusinessID: order.BusinessID, Subject: order.Subject, Amount: order.Amount,
-		OriginalAmount: order.OriginalAmount, PayerPaidAmount: order.PayerPaidAmount,
-		CashPaidAmount: order.CashPaidAmount, PointPaidAmount: order.PointPaidAmount,
+	confirmation := &PaymentConfirmation{ID: order.ConfirmationID, Provider: order.Provider, TradeNo: order.TradeNo,
+		ProviderTradeNo: result.ProviderTradeNo, BusinessType: order.BusinessType, BusinessID: order.BusinessID,
+		Subject: order.Subject, Amount: order.Amount, OriginalAmount: order.OriginalAmount,
+		PayerPaidAmount: order.PayerPaidAmount, CashPaidAmount: order.CashPaidAmount, PointPaidAmount: order.PointPaidAmount,
 		DiscountAmount: order.DiscountAmount, ProviderDiscountAmount: order.ProviderDiscountAmount,
 		MerchantDiscountAmount: order.MerchantDiscountAmount, SettlementAmount: order.SettlementAmount,
 		Currency: order.Currency, PayerCurrency: order.PayerCurrency, AmountBreakdownKnown: order.AmountBreakdownKnown,
-		Payload: result.Payload, CreatedAt: time.Now().UTC(),
-	}
+		Payload: result.Payload, CreatedAt: time.Now().UTC()}
 	if err = handler.Fulfill(ctx, confirmation); err != nil {
 		_, _ = uc.orders.CompletePaymentFulfillment(ctx, result.Provider, result.TradeNo, token, false, err.Error())
-		uc.logger.Error(ctx, "payment.order.fulfillment_failed", "provider", result.Provider, "trade_no", result.TradeNo, "confirmation_id", confirmation.ID, "error", err)
-		return fail(err)
+		return nil, err
 	}
 	order, err = uc.orders.CompletePaymentFulfillment(ctx, result.Provider, result.TradeNo, token, true, "")
 	if err != nil {
-		uc.logger.Error(ctx, "payment.order.fulfillment_record_failed", "provider", result.Provider, "trade_no", result.TradeNo, "confirmation_id", confirmation.ID, "error", err)
-		return fail(err)
+		return nil, err
 	}
 	result.Status = "fulfilled"
 	return attachOrderResult(result, order), nil