fix(protobuf): wrap enums in messages

Signed-off-by: Ahmed Mohamed <[email protected]>

Author: ahmdmhd

src/s2dm/exporters/protobuf/templates/proto.j2

@@ -8,12 +8,14 @@ package {{ package }};
 {% if enum.description %}
 // {{ enum.description }}
 {% endif %}
-enum {{ enum.name }} {
-  {{ enum.name | upper }}_UNSPECIFIED = 0;
+message {{ enum.name }} {
+  enum Enum {
+    {{ enum.name | upper }}_UNSPECIFIED = 0;
 {% for value in enum.enum_values %}
-  {{ value.name }} = {{ value.number }};{% if value.description %}  // {{ value.description }}{% endif %}
+    {{ value.name }} = {{ value.number }};{% if value.description %}  // {{ value.description }}{% endif %}
 
 {% endfor %}
+  }
 }
 
 {% endfor %}

src/s2dm/exporters/protobuf/transformer.py

@@ -343,7 +343,7 @@ def _get_field_proto_type(self, field_type: GraphQLType) -> str:
 
         if is_enum_type(field_type):
             enum_type = cast(GraphQLEnumType, field_type)
-            return enum_type.name
+            return f"{enum_type.name}.Enum"
 
         if is_object_type(field_type) or is_interface_type(field_type):
             named_type = cast(GraphQLObjectType | GraphQLInterfaceType, field_type)