Add public asset fetch endpoint (#998)

* Add public asset fetch endpoint

* Remove filter

* Add caching, remove permissions

* Remove unused import

care/facility/api/serializers/asset.py

@@ -1,4 +1,5 @@
 from re import L
+from django.core.cache import cache
 from django.db import transaction
 from django.shortcuts import get_object_or_404
 from rest_framework.exceptions import ValidationError
@@ -75,6 +76,11 @@ def update(self, instance, validated_data):
             updated_instance = super().update(instance, validated_data)
         return updated_instance
 
+    def save(self, **kwargs):
+        cache_key = "asset:" + str(self.instance.external_id)
+        cache.delete(cache_key)
+        return super().save(**kwargs)
+
 
 class AssetBareMinimumSerializer(ModelSerializer):
     id = UUIDField(source="external_id", read_only=True)

care/facility/api/viewsets/asset.py

@@ -1,3 +1,4 @@
+from django.core.cache import cache
 from django.db.models import Q
 from django.http import Http404
 from django.shortcuts import get_object_or_404
@@ -98,6 +99,22 @@ class AssetFilter(filters.FilterSet):
     qr_code_id = filters.CharFilter(field_name="qr_code_id", lookup_expr="icontains")
 
 
+class AssetPublicViewSet(GenericViewSet):
+    queryset = Asset.objects.all()
+    serializer_class = AssetSerializer
+    lookup_field = "external_id"
+
+    def retrieve(self, request, *args, **kwargs):
+        key = "asset:" + kwargs["external_id"]
+        hit = cache.get(key)
+        if not hit:
+            instance = self.get_object()
+            serializer = self.get_serializer(instance)
+            cache.set(key, serializer.data, 60 * 60 * 24) # Cache the asset details for 24 hours
+            return Response(serializer.data)
+        return Response(hit)
+
+
 class AssetViewSet(
     ListModelMixin,
     RetrieveModelMixin,

config/api_router.py

@@ -11,6 +11,7 @@
     AssetLocationViewSet,
     AssetTransactionViewSet,
     AssetViewSet,
+    AssetPublicViewSet
 )
 from care.facility.api.viewsets.bed import (
     AssetBedViewSet,
@@ -187,6 +188,9 @@
 consultation_nested_router.register(r"daily_rounds", DailyRoundsViewSet)
 consultation_nested_router.register(r"investigation", InvestigationValueViewSet)
 
+# Public endpoints
+router.register("public/asset", AssetPublicViewSet)
+
 app_name = "api"
 urlpatterns = [
     url(r"^", include(router.urls)),