From 5670ae79bf4bc8ef683a197afc41474d8244d89c Mon Sep 17 00:00:00 2001
From: AJ Isaacs <ajisaacs27@gmail.com>
Date: Tue, 17 Mar 2026 07:57:54 -0400
Subject: [PATCH] feat(core): add ShapeDefinition base class

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 OpenNest.Core/Shapes/ShapeDefinition.cs | 33 +++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 OpenNest.Core/Shapes/ShapeDefinition.cs

diff --git a/OpenNest.Core/Shapes/ShapeDefinition.cs b/OpenNest.Core/Shapes/ShapeDefinition.cs
new file mode 100644
index 0000000..2e57f1e
--- /dev/null
+++ b/OpenNest.Core/Shapes/ShapeDefinition.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Collections.Generic;
+using OpenNest.Converters;
+using OpenNest.Geometry;
+
+namespace OpenNest.Shapes
+{
+    public abstract class ShapeDefinition
+    {
+        public string Name { get; set; }
+
+        protected ShapeDefinition()
+        {
+            var typeName = GetType().Name;
+            Name = typeName.EndsWith("Shape")
+                ? typeName.Substring(0, typeName.Length - 5)
+                : typeName;
+        }
+
+        public abstract Drawing GetDrawing();
+
+        protected Drawing CreateDrawing(List<Entity> entities)
+        {
+            var pgm = ConvertGeometry.ToProgram(entities);
+
+            if (pgm == null)
+                throw new InvalidOperationException(
+                    $"Failed to create program for shape '{Name}'. Check that parameters produce valid geometry.");
+
+            return new Drawing(Name, pgm);
+        }
+    }
+}