商品加入购买状态 商品详情加入水印

src/main/java/com/aida/seller/common/context/UserContext.java

@@ -52,4 +52,15 @@ public class UserContext {
         }
         return holder.getId();
     }
+
+    public static Long getBuyerIdSafely() {
+        AuthPrincipalVo holder = userHolder.get();
+        if (holder == null) {
+            return null;
+        }
+        if (!"BUYER".equals(holder.getSource())) {
+            return null;
+        }
+        return holder.getId();
+    }
 }