draft wall builder

packages/core/src/events/bus.ts

@@ -1,5 +1,5 @@
 import mitt from "mitt";
-import { ItemNode, WallNode } from "../schema";
+import { BuildingNode, ItemNode, WallNode } from "../schema";
 import { AnyNode } from "../schema/types";
 
 // Base event interfaces
@@ -16,6 +16,7 @@ export interface NodeEvent<T extends AnyNode = AnyNode> {
 
 export type WallEvent = NodeEvent<WallNode>;
 export type ItemEvent = NodeEvent<ItemNode>;
+export type BuildingEvent = NodeEvent<BuildingNode>;
 
 // Event suffixes - exported for use in hooks
 export const eventSuffixes = [
@@ -41,6 +42,7 @@ type GridEvents = {
 
 type EditorEvents = GridEvents &
   NodeEvents<"wall", WallEvent> &
-  NodeEvents<"item", ItemEvent>;
+  NodeEvents<"item", ItemEvent> &
+  NodeEvents<"building", BuildingEvent>;
 
 export const emitter = mitt<EditorEvents>();

packages/core/src/store/use-scene.ts

@@ -20,6 +20,8 @@ type SceneState = {
   loadScene: () => void;
   markDirty: (id: AnyNodeId) => void;
   clearDirty: (id: AnyNodeId) => void;
+
+  createNode: (node: AnyNode, parentId?: AnyNodeId) => void;
 };
 
 const useScene = create<SceneState>()((set, get) => ({
@@ -123,6 +125,27 @@ const useScene = create<SceneState>()((set, get) => ({
   clearDirty: (id) => {
     get().dirtyNodes.delete(id);
   },
+
+  createNode: (node, parentId) => {
+      set((state) => {
+    const newNodes = { ...state.nodes, [node.id]: node };
+
+    if (parentId) {
+      const parent = state.nodes[parentId];
+      if (parent) {
+        newNodes[parentId] = {
+          ...parent,
+          children: [...parent.children, node.id], 
+        };
+      }
+    }
+
+    return { nodes: newNodes };
+  });
+
+  get().markDirty(node.id);
+  if (parentId) get().markDirty(parentId);
+  }
 }));
 
 useScene.getState().loadScene();