#31 API protected visibility

* reworks most internal API methods for de/serializing from public to protected visibility
* moves test_api_sharing.py into /share subfolder of tests

api/utils/serializer/serializer.py

@@ -31,7 +31,7 @@ class AbstractModelAPISerializer:
         super().__init__(*args, **kwargs)
 
     @abstractmethod
-    def model_to_geo_json(self, entry):
+    def _model_to_geo_json(self, entry):
         """ Defines the model as geo json
 
         Args:
@@ -43,7 +43,7 @@ class AbstractModelAPISerializer:
         raise NotImplementedError("Must be implemented in subclasses")
 
     @abstractmethod
-    def extend_properties_data(self, entry):
+    def _extend_properties_data(self, entry):
         """ Defines the 'properties' part of geo json
 
         Args:
@@ -83,7 +83,7 @@ class AbstractModelAPISerializer:
         entries = self.model.objects.filter(**self.lookup)
         serialized_data = {}
         for entry in entries:
-            serialized_data[str(entry.id)] = self.model_to_geo_json(entry)
+            serialized_data[str(entry.id)] = self._model_to_geo_json(entry)
         return serialized_data
 
     @abstractmethod
@@ -113,7 +113,7 @@ class AbstractModelAPISerializer:
         """
         raise NotImplementedError("Must be implemented in subclasses")
 
-    def create_geometry_from_json(self, geojson) -> GEOSGeometry:
+    def _create_geometry_from_json(self, geojson) -> GEOSGeometry:
         """ Creates a GEOSGeometry object based on the given geojson
 
         Args:
@@ -129,7 +129,7 @@ class AbstractModelAPISerializer:
             geometry = None
         return geometry
 
-    def get_obj_from_db(self, id, user):
+    def _get_obj_from_db(self, id, user):
         """ Returns the object from database
 
         Fails if id not found or user does not have shared access
@@ -151,7 +151,7 @@ class AbstractModelAPISerializer:
         return obj
 
     @abstractmethod
-    def initialize_objects(self, json_model, user):
+    def _initialize_objects(self, json_model, user):
         """ Initializes all needed objects from the json_model data
 
         Does not persist data to the DB!