From 4c0ce8d2a24eb502680d90290607dfc05d5ca6a5 Mon Sep 17 00:00:00 2001
From: serversdwn <brianharrison02@gmail.com>
Date: Thu, 29 Jan 2026 21:27:19 +0000
Subject: [PATCH] fix: time now sent in UTC to account for terra-view's TZ user
 settings.

---
 series4_emitter.py | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/series4_emitter.py b/series4_emitter.py
index 0979ee4..6480673 100644
--- a/series4_emitter.py
+++ b/series4_emitter.py
@@ -19,8 +19,9 @@ import re
 import time
 import json
 import sys
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from typing import Dict, Any, Optional, Tuple
+from zoneinfo import ZoneInfo
 
 try:
     # urllib is in stdlib; used instead of requests for portability
@@ -299,16 +300,19 @@ def build_sfm_payload(unit_map: Dict[str, Dict[str, Any]]) -> Dict[str, Any]:
     """
     Build a JSON-serializable payload for SFM backend.
 
+    All timestamps are converted to UTC for transmission (standard practice).
+    Terra-View stores UTC and converts to local time for display.
+
     Structure (example):
     {
       "source": "series4_emitter",
-      "generated_at": "2025-12-04T20:01:00",
+      "generated_at": "2025-12-04T20:01:00Z",
       "units": [
         {
           "unit_id": "UM11719",
           "type": "micromate",
           "project_hint": "Clearwater - ECMS 57940",
-          "last_call": "2025-12-04T19:30:42",
+          "last_call": "2025-12-05T00:30:42Z",
           "status": "OK",
           "age_days": 0.04,
           "age_hours": 0.9,
@@ -318,7 +322,9 @@ def build_sfm_payload(unit_map: Dict[str, Dict[str, Any]]) -> Dict[str, Any]:
       ]
     }
     """
-    now = datetime.now()
+    now_local = datetime.now()
+    now_utc = datetime.now(timezone.utc)
+    local_tz = ZoneInfo("America/New_York")
     payload_units = []
 
     for unit_id, entry in unit_map.items():
@@ -326,15 +332,19 @@ def build_sfm_payload(unit_map: Dict[str, Dict[str, Any]]) -> Dict[str, Any]:
         project = entry["project"]
         mlg_path = entry["mlg_path"]
 
-        status, age_days = determine_status(last_call, now)
+        # Use local time for status calculation (age comparison)
+        status, age_days = determine_status(last_call, now_local)
         age_hours = age_days * 24.0
 
+        # Convert last_call from local time to UTC for transmission
+        last_call_utc = last_call.replace(tzinfo=local_tz).astimezone(timezone.utc)
+
         payload_units.append(
             {
                 "unit_id": unit_id,
                 "type": "micromate",
                 "project_hint": project,
-                "last_call": last_call.isoformat(),
+                "last_call": last_call_utc.strftime("%Y-%m-%dT%H:%M:%SZ"),
                 "status": status,
                 "age_days": age_days,
                 "age_hours": age_hours,
@@ -344,7 +354,7 @@ def build_sfm_payload(unit_map: Dict[str, Dict[str, Any]]) -> Dict[str, Any]:
 
     payload = {
         "source": "series4_emitter",
-        "generated_at": now.isoformat(),
+        "generated_at": now_utc.strftime("%Y-%m-%dT%H:%M:%SZ"),
         "units": payload_units,
     }
     return payload