Feat: Update delete path command to manage junction connections

src/commands/delete-path-command.ts

@@ -2,6 +2,10 @@ import { createOpaqueId } from "../core/ids";
 import { cloneEditorSelection, type EditorSelection } from "../core/selection";
 import type { ToolMode } from "../core/tool-mode";
 import { cloneScenePath, type ScenePath } from "../document/paths";
+import {
+  cloneSplineCorridorJunction,
+  type SplineCorridorJunction
+} from "../document/spline-corridor-junctions";
 
 import type { EditorCommand } from "./command";
 
@@ -15,6 +19,7 @@ function selectionIncludesPath(selection: EditorSelection, pathId: string): bool
 
 export function createDeletePathCommand(pathId: string): EditorCommand {
   let previousPath: ScenePath | null = null;
+  let previousJunctions: Record<string, SplineCorridorJunction> | null = null;
   let previousSelection: EditorSelection | null = null;
   let previousToolMode: ToolMode | null = null;
 
@@ -33,6 +38,21 @@ export function createDeletePathCommand(pathId: string): EditorCommand {
         previousPath = cloneScenePath(currentPath);
       }
 
+      if (previousJunctions === null) {
+        previousJunctions = Object.fromEntries(
+          Object.entries(currentDocument.splineCorridorJunctions)
+            .filter(([, junction]) =>
+              junction.connections.some(
+                (connection) => connection.pathId === pathId
+              )
+            )
+            .map(([junctionId, junction]) => [
+              junctionId,
+              cloneSplineCorridorJunction(junction)
+            ])
+        );
+      }
+
       if (previousSelection === null) {
         previousSelection = cloneEditorSelection(context.getSelection());
       }
@@ -45,10 +65,24 @@ export function createDeletePathCommand(pathId: string): EditorCommand {
         ...currentDocument.paths
       };
       delete nextPaths[pathId];
+      const nextJunctions = Object.fromEntries(
+        Object.entries(currentDocument.splineCorridorJunctions)
+          .map(([junctionId, junction]) => [
+            junctionId,
+            cloneSplineCorridorJunction({
+              ...junction,
+              connections: junction.connections.filter(
+                (connection) => connection.pathId !== pathId
+              )
+            })
+          ])
+          .filter(([, junction]) => junction.connections.length >= 2)
+      );
 
       context.setDocument({
         ...currentDocument,
-        paths: nextPaths
+        paths: nextPaths,
+        splineCorridorJunctions: nextJunctions
       });
 
       if (selectionIncludesPath(context.getSelection(), pathId)) {
@@ -71,6 +105,17 @@ export function createDeletePathCommand(pathId: string): EditorCommand {
         paths: {
           ...currentDocument.paths,
           [previousPath.id]: cloneScenePath(previousPath)
+        },
+        splineCorridorJunctions: {
+          ...currentDocument.splineCorridorJunctions,
+          ...Object.fromEntries(
+            Object.entries(previousJunctions ?? {}).map(
+              ([junctionId, junction]) => [
+                junctionId,
+                cloneSplineCorridorJunction(junction)
+              ]
+            )
+          )
         }
       });