From 1738d6c0b98bfc72c41f9a0781596945f23ad5b2 Mon Sep 17 00:00:00 2001
From: Ray Wang <134452344+ray-oxd@users.noreply.github.com>
Date: Fri, 1 Dec 2023 13:54:59 -0800
Subject: [PATCH] DBC22-1352: event and camera feeds now check timestamp before
 querying (#210)

---
 src/backend/apps/event/tasks.py  | 8 +++++---
 src/backend/apps/webcam/tasks.py | 9 ++++++---
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/backend/apps/event/tasks.py b/src/backend/apps/event/tasks.py
index 19a2f3ff4..ab67673fc 100644
--- a/src/backend/apps/event/tasks.py
+++ b/src/backend/apps/event/tasks.py
@@ -20,9 +20,11 @@ def populate_event_from_data(event_data):
     except ObjectDoesNotExist:
         event = Event(id=event_id)
 
-    event_serializer = EventSerializer(event, data=event_data)
-    event_serializer.is_valid(raise_exception=True)
-    event_serializer.save()
+    # Only update data if official last updated timestamp is different
+    if event.last_updated != event_data['last_updated']:
+        event_serializer = EventSerializer(event, data=event_data)
+        event_serializer.is_valid(raise_exception=True)
+        event_serializer.save()
 
 
 def populate_all_event_data():
diff --git a/src/backend/apps/webcam/tasks.py b/src/backend/apps/webcam/tasks.py
index cbc59084a..5dc210d87 100644
--- a/src/backend/apps/webcam/tasks.py
+++ b/src/backend/apps/webcam/tasks.py
@@ -36,9 +36,12 @@ def populate_all_webcam_data():
 
 def update_single_webcam_data(webcam):
     webcam_data = FeedClient().get_webcam(webcam)
-    webcam_serializer = WebcamSerializer(webcam, data=webcam_data)
-    webcam_serializer.is_valid(raise_exception=True)
-    webcam_serializer.save()
+
+    # Only update data if official last updated timestamp is different
+    if webcam.last_update_modified != webcam_data['last_update_modified']:
+        webcam_serializer = WebcamSerializer(webcam, data=webcam_data)
+        webcam_serializer.is_valid(raise_exception=True)
+        webcam_serializer.save()
 
 
 def update_all_webcam_data():