Implement cancel offer functionality

core/serializers.py

@@ -1,6 +1,6 @@
 from django.conf import settings
 from rest_framework import exceptions as rest_exceptions
-from rest_framework import serializers
+from rest_framework import generics, serializers
 
 from . import exceptions, models
 from .service import CoreService
@@ -219,3 +219,18 @@ def save(self, **kwargs):
         data = OfferSerializer(offer).data
 
         return data
+
+
+class CancelOfferSerializer(serializers.Serializer):
+    offer = serializers.UUIDField
+
+    def validate(self, attrs):
+        user = self.context["user"]
+        # check if the offer exist and it belongs
+        # to the user requesting the action
+        generics.get_object_or_404(models.Offer, id=attrs["offer"], user=user)
+        return attrs
+
+    def save(self):
+        # delete the offer
+        CoreService.cancel_offer(self.validated_data["offer_id"])

core/service.py

@@ -108,3 +108,12 @@ def create_offer(
         offer.signature_unique_id = signature_unique_id
         offer.save()
         return offer
+
+    @classmethod
+    def cancel_offer(cls, offer_id: str):
+        """
+        Delete the offer
+        Args:
+            offer_id(str): The id of the offer
+        """
+        models.Offer.objects.get(id=offer_id).delete()

core/urls.py

@@ -19,4 +19,5 @@
         name="signin",
     ),
     path("offer/create/", views.OfferCreateAPIView.as_view(), name="create-offer"),
+    path("offer/cancel/", views.OfferCancelAPIView.as_view(), name="cancel-offer"),
 ]

core/views.py

@@ -38,3 +38,15 @@ def post(self, request):
         serializer.is_valid(raise_exception=True)
         data = serializer.save()
         return Response(data, status=status.HTTP_201_CREATED)
+
+
+class OfferCancelAPIView(GenericAPIView):
+    serializer_class = serializers.CancelOfferSerializer
+    permission_classes = [IsAuthenticated]
+
+    def post(self, request):
+        user = request.user
+        serializer = self.serializer_class(data=request.data, context={"user": user})
+        serializer.is_valid(raise_exception=True)
+        serializer.save()
+        return Response(status=status.HTTP_204_NO_CONTENT)