Add API endpoint for TLE

Signed-off-by: Alfredos-Panagiotis Damkalis <fredy@fredy.gr>

db/api/filters.py

@@ -3,7 +3,8 @@ import django_filters
 from django_filters import rest_framework as filters
 from django_filters.rest_framework import FilterSet
 
-from db.base.models import Artifact, DemodData, Mode, Satellite, Transmitter
+from db.base.models import Artifact, DemodData, Mode, Satellite, Tle, \
+    Transmitter
 
 
 class TransmitterViewFilter(FilterSet):
@@ -56,6 +57,17 @@ class TelemetryViewFilter(FilterSet):
         fields = ['satellite', 'app_source', 'observer', 'transmitter']
 
 
+class TleViewFilter(FilterSet):
+    """SatNOGS DB Tle API View Filter"""
+    norad_cat_id = django_filters.NumberFilter(
+        field_name='satellite__norad_cat_id', lookup_expr='exact'
+    )
+
+    class Meta:
+        model = Tle
+        fields = ['norad_cat_id']
+
+
 class ArtifactViewFilter(FilterSet):
     """SatNOGS DB Artifact API View Filter"""
     class Meta:

db/api/serializers.py

@@ -5,7 +5,7 @@ import h5py
 from rest_framework import serializers
 
 from db.base.models import TRANSMITTER_STATUS, Artifact, DemodData, Mode, \
-    Satellite, Telemetry, Transmitter
+    Satellite, Telemetry, Tle, Transmitter
 
 
 class ModeSerializer(serializers.ModelSerializer):
@@ -90,6 +90,20 @@ class TransmitterSerializer(serializers.ModelSerializer):
         return obj.satellite.norad_cat_id
 
 
+class TleSerializer(serializers.ModelSerializer):
+    """SatNOGS DB Tle API Serializer"""
+
+    norad_cat_id = serializers.SerializerMethodField()
+
+    class Meta:
+        model = Tle
+        fields = ('tle0', 'tle1', 'tle2', 'tle_source', 'norad_cat_id', 'updated')
+
+    def get_norad_cat_id(self, obj):
+        """Returns Satellite NORAD ID"""
+        return obj.satellite.norad_cat_id
+
+
 class TelemetrySerializer(serializers.ModelSerializer):
     """SatNOGS DB Telemetry API Serializer"""
     norad_cat_id = serializers.SerializerMethodField()

db/api/urls.py

@@ -10,5 +10,6 @@ ROUTER.register(r'modes', views.ModeView)
 ROUTER.register(r'satellites', views.SatelliteView)
 ROUTER.register(r'transmitters', views.TransmitterView)
 ROUTER.register(r'telemetry', views.TelemetryView)
+ROUTER.register(r'tle', views.TleView)
 
 API_URLPATTERNS = ROUTER.urls

db/api/views.py

@@ -11,7 +11,8 @@ from rest_framework.serializers import ValidationError
 from db.api import filters, pagination, serializers
 from db.api.perms import SafeMethodsWithPermission
 from db.api.renderers import BrowserableJSONLDRenderer, JSONLDRenderer
-from db.base.models import Artifact, DemodData, Mode, Satellite, Transmitter
+from db.base.models import Artifact, DemodData, LatestTle, Mode, Satellite, \
+    Transmitter
 from db.base.tasks import update_satellite
 
 
@@ -46,6 +47,14 @@ class TransmitterView(viewsets.ReadOnlyModelViewSet):  # pylint: disable=R0901
     lookup_field = 'uuid'
 
 
+class TleView(viewsets.ReadOnlyModelViewSet):  # pylint: disable=R0901
+    """SatNOGS DB Tle API view class"""
+    renderer_classes = [JSONRenderer]
+    queryset = LatestTle.objects.all()
+    serializer_class = serializers.TleSerializer
+    filterset_class = filters.TleViewFilter
+
+
 class TelemetryView(  # pylint: disable=R0901
         mixins.ListModelMixin, mixins.RetrieveModelMixin, mixins.CreateModelMixin,
         viewsets.GenericViewSet):