From 0a32cd1d21d440d253e846e68ca13530f58d7705 Mon Sep 17 00:00:00 2001
From: Tom Boullay <tom@famille-boullay.fr>
Date: Thu, 14 May 2026 00:17:44 +0200
Subject: [PATCH] feat: add map node caching for vegetation system

---
 src/utils/map/loadMapSceneData.ts | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/src/utils/map/loadMapSceneData.ts b/src/utils/map/loadMapSceneData.ts
index 8f334eb..b1a0cb4 100644
--- a/src/utils/map/loadMapSceneData.ts
+++ b/src/utils/map/loadMapSceneData.ts
@@ -7,7 +7,36 @@ const HTML_CONTENT_TYPE = "text/html";
 const MAP_STRUCTURE_NODE_NAMES = new Set(["Scene", "blocking"]);
 type ModelEntry = [modelName: string, modelUrl: string];
 
+let cachedSceneData: SceneData | null = null;
+let loadingPromise: Promise<SceneData | null> | null = null;
+
 export async function loadMapSceneData(): Promise<SceneData | null> {
+  if (cachedSceneData) {
+    return cachedSceneData;
+  }
+
+  if (loadingPromise) {
+    return loadingPromise;
+  }
+
+  loadingPromise = loadMapSceneDataInternal();
+  cachedSceneData = await loadingPromise;
+  loadingPromise = null;
+
+  return cachedSceneData;
+}
+
+export function getMapNodes(): MapNode[] | null {
+  return cachedSceneData?.mapNodes ?? null;
+}
+
+export function getMapNodesByName(name: string): MapNode[] {
+  const nodes = cachedSceneData?.mapNodes;
+  if (!nodes) return [];
+  return nodes.filter((node) => node.name === name);
+}
+
+async function loadMapSceneDataInternal(): Promise<SceneData | null> {
   const response = await fetch(MAP_JSON_PATH);
 
   if (!response.ok) {