Better error message when passing invalid geojson to validate_geojson…

…_coordinates

openeo_driver/util/geometry.py

@@ -11,6 +11,7 @@
 from shapely.geometry import MultiPolygon, Polygon
 from shapely.geometry.base import BaseGeometry
 
+from openeo.util import repr_truncate
 from openeo_driver.errors import OpenEOApiException
 from openeo_driver.util.utm import auto_utm_epsg, auto_utm_epsg_for_geometry
 
@@ -78,7 +79,7 @@ def validate_geojson_basic(
     return []
 
 
-def validate_geojson_coordinates(geojson):
+def validate_geojson_coordinates(geojson: dict):
     def _validate_coordinates(coordinates, initial_run=True):
         max_evaluations = 20
         message = f"Failed to parse Geojson. Coordinates are invalid."
@@ -120,6 +121,11 @@ def _validate_feature_collection(geojson):
             else:
                 _validate_coordinates(feature["geometry"]["coordinates"])
 
+    if not isinstance(geojson, dict):
+        raise ValueError(f"Invalid GeoJSON: not a dict: {repr_truncate(geojson)}")
+    if "type" not in geojson:
+        raise ValueError(f"Invalid GeoJSON: missing 'type' field: {repr_truncate(geojson)}")
+
     if geojson["type"] == "Feature":
         geojson = geojson["geometry"]