14118 FIX Notification spooler: Fix execution of notifications on sites only forwarding

CMK-10544

Change-Id: I04e70bf7f837954979d5417044891c1a7253d3ad

.werks/14118

+Title: Notification spooler: Fix execution of notifications on sites only forwarding
+Class: fix
+Compatible: compat
+Component: notifications
+Date: 1652947508
+Edition: cee
+Knowledge: doc
+Level: 1
+State: unknown
+Version: 2.2.0i1
+
+On sites which had the option "Forward to remote site by notification spooler"
+configured, the answer of the target site also lead to execution of of the
+notification at this site, leading to duplicated notifications.
+
+Furthermore, the result of the execution was not logged to history.

cmk/utils/notify.py

@@ -7,7 +7,7 @@
 import os
 import subprocess
 from logging import Logger
-from typing import List, NewType, Optional
+from typing import List, NewType, Optional, TypedDict
 
 import cmk.utils.defines
 from cmk.utils.exceptions import MKGeneralException
@@ -25,6 +25,14 @@ NotificationPluginName = NewType("NotificationPluginName", str)
 NotificationContext = NewType("NotificationContext", dict[str, str])
 
 
+class NotificationResult(TypedDict, total=False):
+    plugin: NotificationPluginName
+    status: NotificationResultCode
+    output: List[str]
+    forward: bool
+    context: NotificationContext
+
+
 def _state_for(exit_code: NotificationResultCode) -> str:
     return cmk.utils.defines.service_state_name(exit_code, "UNKNOWN")