flows: Load Stages without refreshing the whole page (#33)

* flows: initial implementation of FlowExecutorShell

* flows: load messages dynamically upon card refresh

passbook/core/api/messages.py

@@ -0,0 +1,36 @@
+"""core messages API"""
+from django.contrib.messages import get_messages
+from drf_yasg.utils import swagger_auto_schema
+from rest_framework.permissions import AllowAny
+from rest_framework.request import Request
+from rest_framework.response import Response
+from rest_framework.serializers import ReadOnlyField, Serializer
+from rest_framework.viewsets import ViewSet
+
+
+class MessageSerializer(Serializer):
+    """Serialize Django Message into DRF Object"""
+
+    message = ReadOnlyField()
+    level = ReadOnlyField()
+    tags = ReadOnlyField()
+    extra_tags = ReadOnlyField()
+    level_tag = ReadOnlyField()
+
+    def create(self, request: Request) -> Response:
+        raise NotImplementedError
+
+    def update(self, request: Request) -> Response:
+        raise NotImplementedError
+
+
+class MessagesViewSet(ViewSet):
+    """Read-only view set that returns the current session's messages"""
+
+    permission_classes = [AllowAny]
+
+    @swagger_auto_schema(responses={200: MessageSerializer(many=True)})
+    def list(self, request: Request) -> Response:
+        """List current messages and pass into Serializer"""
+        all_messages = list(get_messages(request))
+        return Response(MessageSerializer(all_messages, many=True).data)

passbook/core/api/policies.py

@@ -1,31 +0,0 @@
-"""Policy API Views"""
-from rest_framework.serializers import ModelSerializer, SerializerMethodField
-from rest_framework.viewsets import ReadOnlyModelViewSet
-
-from passbook.policies.forms import GENERAL_FIELDS
-from passbook.policies.models import Policy
-
-
-class PolicySerializer(ModelSerializer):
-    """Policy Serializer"""
-
-    __type__ = SerializerMethodField(method_name="get_type")
-
-    def get_type(self, obj):
-        """Get object type so that we know which API Endpoint to use to get the full object"""
-        return obj._meta.object_name.lower().replace("policy", "")
-
-    class Meta:
-
-        model = Policy
-        fields = ["pk"] + GENERAL_FIELDS + ["__type__"]
-
-
-class PolicyViewSet(ReadOnlyModelViewSet):
-    """Policy Viewset"""
-
-    queryset = Policy.objects.all()
-    serializer_class = PolicySerializer
-
-    def get_queryset(self):
-        return Policy.objects.select_subclasses()