Merge pull request '# Bugfix empty feature collection' (#597) from bugfix_empty_geometry_on_form into master

Reviewed-on: #597

konova/utils/geometry/geometry_validator.py

@@ -277,10 +277,10 @@ class GeoJsonValidator:
         """
         features = self._input_geojson.get("features", [])
 
-        is_input_geojson_empty = len(self._input_geojson) == 0
+        is_input_geojson_empty_str = len(self._input_geojson) == 0
         no_features_in_input_found = len(features) == 0
 
-        if not is_input_geojson_empty and no_features_in_input_found:
+        if not is_input_geojson_empty_str and no_features_in_input_found:
             # check if _input_geojson is a feature itself
             if self.__is_geojson_feature():
                 features = [
@@ -288,6 +288,9 @@ class GeoJsonValidator:
                         "geometry": self._input_geojson
                     }
                 ]
+            elif self.__is_geojson_featurecollection():
+                # special case if empty featurecollection received
+                pass
             else:
                 self.__add_error("Input does not seem to be geojson")
                 return
@@ -371,4 +374,14 @@ class GeoJsonValidator:
         has_type = self._input_geojson.get("type", None) is not None
         has_coordinates = self._input_geojson.get("coordinates", None) is not None
         has_properties = self._input_geojson.get("properties", None) is not None
-        return has_type and has_coordinates and has_properties
+        return has_type and has_coordinates and has_properties
+
+    def __is_geojson_featurecollection(self):
+        """ Checks whether _input_geojson is a geojson featurecollection
+
+        Returns:
+
+        """
+        is_fc_type = self._input_geojson.get("type", None) == "FeatureCollection"
+        has_feature_attribute = isinstance(self._input_geojson.get("features", None), list)
+        return is_fc_type and has_feature_attribute