补充一些通知

internal/service/refund/approval_decision.go

@@ -85,7 +85,10 @@ func (s *Service) applyApprovedDecision(ctx context.Context, event approvalapp.T
 		default:
 			return errors.New(errors.CodeInvalidStatus, "订单状态不允许完成退款")
 		}
-		return s.refundWalletPayment(ctx, tx, &refund, &order, approvedAmount, event.SubmitterAccountID)
+		if err := s.refundWalletPayment(ctx, tx, &refund, &order, approvedAmount, event.SubmitterAccountID); err != nil {
+			return err
+		}
+		return s.appendCompletedNotification(ctx, tx, &refund)
 	})
 	if err != nil {
 		return err

internal/service/refund/service.go

@@ -14,8 +14,10 @@ import (
 	"gorm.io/gorm"
 	"gorm.io/gorm/clause"
 
+	notificationapp "github.com/break/junhong_cmp_fiber/internal/application/notification"
 	refundapprovalapp "github.com/break/junhong_cmp_fiber/internal/application/refundapproval"
 	walletapp "github.com/break/junhong_cmp_fiber/internal/application/wallet"
+	"github.com/break/junhong_cmp_fiber/internal/infrastructure/messaging/outbox"
 	"github.com/break/junhong_cmp_fiber/internal/model"
 	"github.com/break/junhong_cmp_fiber/internal/model/dto"
 	"github.com/break/junhong_cmp_fiber/internal/store"
@@ -47,6 +49,7 @@ type Service struct {
 	assetWalletStore            *postgres.AssetWalletStore
 	agentWalletRefundService    *walletapp.RefundService
 	refundApprovalCreation      *refundapprovalapp.CreationService
+	notificationOutbox          *outbox.Repository
 	logger                      *zap.Logger
 }
 
@@ -93,6 +96,11 @@ func (s *Service) SetRefundApprovalCreationService(service *refundapprovalapp.Cr
 	s.refundApprovalCreation = service
 }
 
+// SetNotificationOutbox 注入退款完成后的可靠店铺通知 Outbox。
+func (s *Service) SetNotificationOutbox(repository *outbox.Repository) {
+	s.notificationOutbox = repository
+}
+
 // Create 创建退款申请
 // 校验订单存在且已支付，检查是否存在活跃退款申请，生成退款单号并创建记录
 func (s *Service) Create(ctx context.Context, req *dto.CreateRefundRequest) (*dto.RefundResponse, error) {
@@ -306,8 +314,7 @@ func (s *Service) Approve(ctx context.Context, id uint, req *dto.ApproveRefundRe
 		if err := s.refundWalletPayment(ctx, tx, refund, order, approvedAmount, userID); err != nil {
 			return err
 		}
-
-		return nil
+		return s.appendCompletedNotification(ctx, tx, refund)
 	}); err != nil {
 		return err
 	}
@@ -326,6 +333,34 @@ func (s *Service) Approve(ctx context.Context, id uint, req *dto.ApproveRefundRe
 	return nil
 }
 
+// appendCompletedNotification 在退款业务事务内幂等写入目标店铺通知。
+func (s *Service) appendCompletedNotification(ctx context.Context, tx *gorm.DB, refund *model.RefundRequest) error {
+	if refund == nil || refund.ShopID == nil {
+		return nil
+	}
+	if s.notificationOutbox == nil {
+		return errors.New(errors.CodeInternalError, "退款通知 Outbox 未配置")
+	}
+	refundID := fmt.Sprintf("%d", refund.ID)
+	eventID := "refund:" + refundID + ":completed"
+	_, err := s.notificationOutbox.AppendIdempotent(ctx, tx, outbox.Envelope{
+		EventID: eventID, EventType: constants.OutboxEventTypeAdminDynamicNotification,
+		PayloadVersion: constants.NotificationPayloadVersionV1,
+		AggregateType:  "refund", AggregateID: refundID,
+		ResourceType: constants.NotificationRefTypeRefund, ResourceID: refundID,
+		BusinessKey: eventID,
+		Payload: notificationapp.AdminDynamicPayload{
+			TargetKind: constants.NotificationTargetKindShop, TargetID: *refund.ShopID,
+			NotificationType: constants.NotificationTypeRefundCompleted, TemplateData: map[string]string{},
+			RefType: constants.NotificationRefTypeRefund, RefID: refundID, RefKey: refund.RefundNo,
+		},
+	})
+	if err != nil {
+		return errors.Wrap(errors.CodeDatabaseError, err, "写入退款完成通知事件失败")
+	}
+	return nil
+}
+
 // refundWalletPayment 处理钱包支付订单的退款回款。
 func (s *Service) refundWalletPayment(ctx context.Context, tx *gorm.DB, refund *model.RefundRequest, order *model.Order, amount int64, operatorID uint) error {
 	if order.PaymentMethod != model.PaymentMethodWallet {