实现多商户履约平台基础

backend/internal/service/audit.go

@@ -0,0 +1,27 @@
+package service
+
+import (
+	"encoding/json"
+
+	"affiliate_dash/internal/model"
+
+	"gorm.io/gorm"
+)
+
+func writeAudit(tx *gorm.DB, merchantID, actorUserID, apiClientID *uint, action, entityType, entityID string, metadata interface{}) error {
+	raw := ""
+	if metadata != nil {
+		if bytes, err := json.Marshal(metadata); err == nil {
+			raw = string(bytes)
+		}
+	}
+	return tx.Create(&model.AuditLog{
+		MerchantID:  merchantID,
+		ActorUserID: actorUserID,
+		APIClientID: apiClientID,
+		Action:      action,
+		EntityType:  entityType,
+		EntityID:    entityID,
+		Metadata:    raw,
+	}).Error
+}