Begin to introduce a DCL alike view for VMs

uncloud/uncloud_vm/views.py

@@ -148,3 +148,48 @@ class VMSnapshotProductViewSet(viewsets.ModelViewSet):
                         gb_hdd=hdds_size)
 
         return Response(serializer.data)
+
+
+
+# Also create:
+# - /dcl/available_os
+#   Basically a view of public and my disk images
+# -
+class DCLCreateVMProductViewSet(ProductViewSet):
+    """
+    This view resembles the way how DCL VMs are created by default.
+
+    The user chooses an OS, os disk size, ram, cpu and whether or not to have a mapped IPv4 address
+    """
+
+    permission_classes = [permissions.IsAuthenticated]
+    serializer_class = DCLVMProductSerializer
+
+    def get_queryset(self):
+        return VMProduct.objects.filter(owner=self.request.user)
+
+    # Use a database transaction so that we do not get half-created structure
+    # if something goes wrong.
+    @transaction.atomic
+    def create(self, request):
+        # Extract serializer data.
+        serializer = VMProductSerializer(data=request.data, context={'request': request})
+        serializer.is_valid(raise_exception=True)
+        order_recurring_period = serializer.validated_data.pop("recurring_period")
+
+        # Create base order.
+        order = Order.objects.create(
+                recurring_period=order_recurring_period,
+                owner=request.user
+                )
+        order.save()
+
+        # Create VM.
+        vm = serializer.save(owner=request.user, order=order)
+
+        # Add Product record to order (VM is mutable, allows to keep history in order).
+        # XXX: Move this to some kind of on_create hook in parent Product class?
+        order.add_record(vm.one_time_price,
+                vm.recurring_price(order.recurring_period), vm.description)
+
+        return Response(serializer.data)