notify: force env topic

Notification.py

@@ -35,9 +35,7 @@ class NotificationDispatcher:
     def sendReminder(userId: str, reminder: Dict[str, Any]):
         metadata = reminder.get("metadata") or {}
         actualUser = userId or reminder.get("user") or metadata.get("user") or "user"
-        topic = reminder.get("topic") or metadata.get("topic")
-        if not topic:
-            topic = ntfyTopicTemplate.format(userId=actualUser)
+        topic = NotificationDispatcher.buildTopic(actualUser)
         url = NotificationDispatcher.buildTopicUrl(topic)
         if not url:
             return
@@ -76,6 +74,16 @@ class NotificationDispatcher:
         topicSlug = topic.lstrip("/")
         return f"{base}/{topicSlug}"
 
+    @staticmethod
+    def buildTopic(actualUser: str) -> str:
+        template = ntfyTopicTemplate or ""
+        if not template:
+            return ""
+        try:
+            return template.format(userId=actualUser)
+        except (KeyError, IndexError, ValueError):
+            return template
+
     @staticmethod
     def buildHeaders(message_text: str) -> Dict[str, str]:
         headers = {"Title": NotificationDispatcher.buildTitleHeader(message_text)}