七月迭代短暂完结,还有很多后端的关键东西没有弄,这是一版赶时间做的东西

internal/infrastructure/exchange/shipping_notification.go

@@ -0,0 +1,49 @@
+// Package exchange 提供换货业务对公共基础设施的 Adapter。
+package exchange
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+
+	"gorm.io/gorm"
+
+	exchangeapp "github.com/break/junhong_cmp_fiber/internal/application/exchange"
+	notificationapp "github.com/break/junhong_cmp_fiber/internal/application/notification"
+	"github.com/break/junhong_cmp_fiber/internal/infrastructure/messaging/outbox"
+	"github.com/break/junhong_cmp_fiber/pkg/constants"
+	"github.com/break/junhong_cmp_fiber/pkg/errors"
+)
+
+// ShippingNotificationWriter 将物流换货创建事实转换为个人客户通知 Outbox。
+type ShippingNotificationWriter struct {
+	outbox *outbox.Repository
+}
+
+// NewShippingNotificationWriter 创建物流换货通知 Outbox Adapter。
+func NewShippingNotificationWriter(repository *outbox.Repository) *ShippingNotificationWriter {
+	return &ShippingNotificationWriter{outbox: repository}
+}
+
+// Append 在换货业务事务中追加稳定且可重复提交的个人客户通知事件。
+func (w *ShippingNotificationWriter) Append(ctx context.Context, tx *gorm.DB, event exchangeapp.ShippingCreatedEvent) error {
+	if w == nil || w.outbox == nil {
+		return errors.New(errors.CodeInternalError, "物流换货通知 Outbox Writer 未配置")
+	}
+	exchangeID := strconv.FormatUint(uint64(event.ExchangeID), 10)
+	assetID := strconv.FormatUint(uint64(event.AssetID), 10)
+	eventID := fmt.Sprintf("exchange-created:%d:%d", event.ExchangeID, event.CustomerID)
+	_, err := w.outbox.AppendIdempotent(ctx, tx, outbox.Envelope{
+		EventID: eventID, EventType: constants.OutboxEventTypePersonalCustomerDirectNotification,
+		PayloadVersion: constants.NotificationPayloadVersionV1,
+		AggregateType:  "exchange", AggregateID: exchangeID,
+		ResourceType: event.AssetType, ResourceID: assetID,
+		BusinessKey: eventID, RequestID: event.RequestID, CorrelationID: event.CorrelationID,
+		Payload: notificationapp.PersonalCustomerDirectPayload{
+			RecipientID: event.CustomerID, NotificationType: constants.NotificationTypeExchangeShippingCreated,
+			TemplateData: map[string]string{}, RefType: constants.NotificationRefTypeAsset,
+			RefID: assetID, RefKey: event.AssetIdentifier,
+		},
+	})
+	return err
+}