Improve timestamp handling and event navigation

server/monlet_server/services/notifiers/webhook.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import httpx
 
 from ...redaction import redact_dict
+from ...timeutil import payload_with_display_times
 from .base import DeliveryResult
 from .http import classify_response
 
@@ -10,16 +11,22 @@ from .http import classify_response
 class WebhookNotifier:
     name = "webhook"
 
-    def __init__(self, client: httpx.AsyncClient, url: str, token: str = "") -> None:
+    def __init__(
+        self, client: httpx.AsyncClient, url: str, token: str = "", time_zone: str = "UTC"
+    ) -> None:
         self._client = client
         self._url = url
         self._token = token
+        self._time_zone = time_zone
 
     async def deliver(self, event_type: str, payload: dict) -> DeliveryResult:
         headers = {"Content-Type": "application/json"}
         if self._token:
             headers["Authorization"] = f"Bearer {self._token}"
-        body = {"event_type": event_type, "incident": redact_dict(payload)}
+        body = {
+            "event_type": event_type,
+            "incident": redact_dict(payload_with_display_times(payload, self._time_zone)),
+        }
         try:
             resp = await self._client.post(self._url, json=body, headers=headers)
         except httpx.HTTPError as exc: