Feat: Add command to delete spline corridor junctions

src/commands/delete-spline-corridor-junction-command.ts

@@ -0,0 +1,77 @@
+import { createOpaqueId } from "../core/ids";
+import { cloneEditorSelection, type EditorSelection } from "../core/selection";
+import type { ToolMode } from "../core/tool-mode";
+import {
+  cloneSplineCorridorJunction,
+  type SplineCorridorJunction
+} from "../document/spline-corridor-junctions";
+
+import type { EditorCommand } from "./command";
+
+export function createDeleteSplineCorridorJunctionCommand(
+  junctionId: string
+): EditorCommand {
+  let previousJunction: SplineCorridorJunction | null = null;
+  let previousSelection: EditorSelection | null = null;
+  let previousToolMode: ToolMode | null = null;
+
+  return {
+    id: createOpaqueId("command"),
+    label: "Delete spline corridor junction",
+    execute(context) {
+      const currentDocument = context.getDocument();
+      const junction = currentDocument.splineCorridorJunctions[junctionId];
+
+      if (junction === undefined) {
+        throw new Error(`Spline corridor junction ${junctionId} does not exist.`);
+      }
+
+      if (previousJunction === null) {
+        previousJunction = cloneSplineCorridorJunction(junction);
+      }
+
+      if (previousSelection === null) {
+        previousSelection = cloneEditorSelection(context.getSelection());
+      }
+
+      if (previousToolMode === null) {
+        previousToolMode = context.getToolMode();
+      }
+
+      const nextJunctions = {
+        ...currentDocument.splineCorridorJunctions
+      };
+      delete nextJunctions[junctionId];
+
+      context.setDocument({
+        ...currentDocument,
+        splineCorridorJunctions: nextJunctions
+      });
+      context.setToolMode("select");
+    },
+    undo(context) {
+      if (previousJunction === null) {
+        return;
+      }
+
+      const currentDocument = context.getDocument();
+
+      context.setDocument({
+        ...currentDocument,
+        splineCorridorJunctions: {
+          ...currentDocument.splineCorridorJunctions,
+          [previousJunction.id]: cloneSplineCorridorJunction(previousJunction)
+        }
+      });
+
+      if (previousSelection !== null) {
+        context.setSelection(previousSelection);
+      }
+
+      if (previousToolMode !== null) {
+        context.setToolMode(previousToolMode);
+      }
+    }
+  };
+}
+