fix (specklepy): update polyline class to use closed flag

src/specklepy/objects/geometry/polyline.py

@@ -4,6 +4,7 @@
 from specklepy.objects.base import Base
 from specklepy.objects.geometry.point import Point
 from specklepy.objects.interfaces import ICurve, IHasUnits
+from specklepy.objects.models.units import Units
 
 
 @dataclass(kw_only=True)
@@ -13,24 +14,28 @@ class Polyline(Base, IHasUnits, ICurve, speckle_type="Objects.Geometry.Polyline"
     """
 
     value: List[float]
+    closed: bool = False
 
     def __repr__(self) -> str:
-        return f"{self.__class__.__name__}(value: {self.value}, units: {self.units})"
+        return (
+            f"{self.__class__.__name__}("
+            f"value: {self.value}, "
+            f"closed: {self.closed}, "
+            f"units: {self.units})"
+        )
 
-    def is_closed(self, tolerance: float = 1e-6) -> bool:
+    @staticmethod
+    def is_closed(points: List[float], tolerance: float = 1e-6) -> bool:
         """
-        check if the polyline is closed (start point equals end point within tolerance)
+        check if the polyline is closed
         """
-        if len(self.value) < 6:  # need at least 2 points to be closed
+        if len(points) < 6:  # need at least 2 points to be closed
             return False
 
         # compare first and last points
-        start = Point(
-            x=self.value[0], y=self.value[1], z=self.value[2], units=self.units
-        )
-        end = Point(
-            x=self.value[-3], y=self.value[-2], z=self.value[-1], units=self.units
-        )
+        start = Point(x=points[0], y=points[1], z=points[2], units=Units.m)
+        end = Point(x=points[-3], y=points[-2], z=points[-1], units=Units.m)
+
         return start.distance_to(end) <= tolerance
 
     @property
@@ -46,7 +51,7 @@ def calculate_length(self) -> float:
         total_length = 0.0
         for i in range(len(points) - 1):
             total_length += points[i].distance_to(points[i + 1])
-        if self.is_closed() and points:
+        if self.closed and points:
             total_length += points[-1].distance_to(points[0])
         return total_length
 

src/specklepy/objects/tests/test_polyline.py

@@ -54,6 +54,7 @@ def test_polyline_creation(open_square_coords):
     polyline = Polyline(value=open_square_coords, units=Units.m)
     assert polyline.value == open_square_coords
     assert polyline.units == Units.m.value
+    assert polyline.closed is False
 
 
 def test_polyline_domain(sample_polyline):
@@ -63,23 +64,31 @@ def test_polyline_domain(sample_polyline):
 
 
 def test_polyline_is_closed(open_square_coords, closed_square_coords):
-    open_poly = Polyline(value=open_square_coords, units=Units.m)
-    closed_poly = Polyline(value=closed_square_coords, units=Units.m)
+    # Test the static method
+    assert not Polyline.is_closed(open_square_coords)
+    assert Polyline.is_closed(closed_square_coords)
 
-    assert not open_poly.is_closed()
-    assert closed_poly.is_closed()
+    # Test with closed flag
+    open_poly = Polyline(value=open_square_coords, units=Units.m)
+    closed_poly = Polyline(value=closed_square_coords, units=Units.m, closed=True)
+    assert not open_poly.closed
+    assert closed_poly.closed
 
 
 def test_polyline_is_closed_with_tolerance(open_square_coords):
     almost_closed = open_square_coords + [
         0.0,
         0.0,
-        0.001,
-    ]  # last point slightly above start
-    poly = Polyline(value=almost_closed, units=Units.m)
+        0.001,  # last point slightly above start
+    ]
+    # Test static method with tolerance
+    assert not Polyline.is_closed(almost_closed, tolerance=1e-6)
+    assert Polyline.is_closed(almost_closed, tolerance=0.01)
 
-    assert not poly.is_closed(tolerance=1e-6)
-    assert poly.is_closed(tolerance=0.01)
+    # Also test with instance
+    poly = Polyline(value=almost_closed, units=Units.m)
+    # poly.closed should reflect what was passed in construction, not computed
+    assert not poly.closed
 
 
 def test_polyline_length_open(sample_polyline):
@@ -88,14 +97,13 @@ def test_polyline_length_open(sample_polyline):
 
 
 def test_polyline_length_closed(closed_square_coords):
-    polyline = Polyline(value=closed_square_coords, units=Units.m)
+    polyline = Polyline(value=closed_square_coords, units=Units.m, closed=True)
     polyline.length = polyline.calculate_length()
     assert polyline.length == 4.0
 
 
 def test_polyline_get_points(sample_polyline):
     points = sample_polyline.get_points()
-
     assert len(points) == 4
     assert all(isinstance(p, Point) for p in points)
     assert all(p.units == Units.m.value for p in points)
@@ -125,16 +133,25 @@ def test_polyline_invalid_coordinates():
 def test_polyline_units(open_square_coords):
     polyline = Polyline(value=open_square_coords, units=Units.m)
     assert polyline.units == Units.m.value
-
     polyline.units = "mm"
     assert polyline.units == "mm"
 
 
+def test_polyline_closed_flag(open_square_coords, closed_square_coords):
+    # Test default value
+    poly1 = Polyline(value=open_square_coords, units=Units.m)
+    assert poly1.closed is False
+
+    # Test explicit value
+    poly2 = Polyline(value=closed_square_coords, units=Units.m, closed=True)
+    assert poly2.closed is True
+
+
 def test_polyline_serialization(sample_polyline):
     serialized = serialize(sample_polyline)
     deserialized = deserialize(serialized)
-
     assert deserialized.value == sample_polyline.value
     assert deserialized.units == sample_polyline.units
     assert deserialized.domain.start == sample_polyline.domain.start
     assert deserialized.domain.end == sample_polyline.domain.end
+    assert deserialized.closed == sample_polyline.closed