fix(slack): skip after hours notification if no participant (#5419)

Author: whitdog47

src/dispatch/plugins/dispatch_slack/case/interactive.py

@@ -1109,6 +1109,13 @@ def handle_case_after_hours_message(
     participant = participant_service.get_by_case_id_and_email(
         db_session=db_session, case_id=context["subject"].id, email=user.email
     )
+    # handle no participant found
+    if not participant:
+        log.warning(
+            f"Participant not found for {user.email} in case {case.id}. Skipping after hours notification."
+        )
+        return
+
     # get their timezone from slack
     owner_tz = (dispatch_slack_service.get_user_info_by_email(client, email=owner_email))["tz"]
     message = f"Responses may be delayed. The current case priority is *{case.case_priority.name}* and your message was sent outside of the Assignee's working hours (Weekdays, 9am-5pm, {owner_tz} timezone)."

src/dispatch/plugins/dispatch_slack/incident/interactive.py

@@ -887,6 +887,9 @@ def handle_after_hours_message(
     )
     # handle no participant found
     if not participant:
+        log.warning(
+            f"Participant not found for {user.email} in incident {incident.id}. Skipping after hours notification."
+        )
         return
 
     # get their timezone from slack