DBC22-6336: added winter time start and end to filter hef data (#1317)

DBC22-6336: got now time per request

DBC22-6336: keep hef data less than 24 hours for forecast

Author: bcgov-brwang

src/backend/apps/weather/views.py

@@ -1,3 +1,7 @@
+from datetime import datetime, timedelta
+from django.utils import timezone
+
+
 from apps.shared.enums import CacheKey, CacheTimeout
 from apps.shared.views import CachedListModelMixin
 from apps.weather.models import CurrentWeather, HighElevationForecast, RegionalWeather
@@ -28,10 +32,17 @@ class CurrentWeatherViewSet(CurrentWeatherAPI, viewsets.ReadOnlyModelViewSet):
     pass
 
 class HighElevationAPI(CachedListModelMixin):
-    queryset = HighElevationForecast.objects.all()
     serializer_class = HighElevationForecastSerializer
     cache_key = CacheKey.HIGH_ELEVATION_LIST
     cache_timeout = CacheTimeout.HIGH_ELEVATION_LIST
 
+    def get_queryset(self):
+        now = timezone.now()
+        cutoff = now - timedelta(hours=24)
+
+        return HighElevationForecast.objects.filter(
+            issued_utc__gte=cutoff
+        ).order_by("-issued_utc")
+
 class HighElevationViewSet(HighElevationAPI, viewsets.ReadOnlyModelViewSet):
     pass