fix: check for duplicates

ORStools/proc/directions_points_layer_proc.py

@@ -218,6 +218,12 @@ def sort(f):
 
             try:
                 if optimization_mode is not None:
+                    # check for duplicate points
+                    if len(points) != len(set(points)):
+                        raise exceptions.DuplicateError(
+                            "There are duplicate points in the input layer, which need to be removed."
+                        )
+
                     params = get_params_optimize(points, profile, optimization_mode)
                     response = ors_client.request("/optimization", {}, post_json=params)
 

ORStools/utils/exceptions.py

@@ -92,3 +92,11 @@ def __str__(self):
             return self.status
         else:
             return f"{self.status} ({self.message})"
+
+
+class DuplicateError(Exception):
+    def __init__(self, message=None):
+        self.message = message
+
+    def __str__(self):
+        return self.message