Cache game titles for offline selector labels

src/extension/game-assets.ts

@@ -6,6 +6,7 @@ import { nodecg } from './util/nodecg.js';
 const CHARACTER_NAMES_FILE = 'fighting-characters.json';
 const LOCAL_MANIFEST_FILE = 'manifest.json';
 const GAME_TITLES_FILE = 'games.json';
+const CACHED_GAME_TITLES_FILE = 'games-cache.json';
 
 type RemoteGame = {
   title: string;
@@ -211,6 +212,26 @@ const fetchCustomGameTitles = async (): Promise<Map<string, string>> => {
   }
 };
 
+const loadCachedGameTitles = async (): Promise<Map<string, string>> => {
+  await ensureAssetsStorageReady();
+  const cachePath = path.join(assetsRoot, CACHED_GAME_TITLES_FILE);
+
+  try {
+    const raw = await readFile(cachePath, 'utf8');
+    const parsed = JSON.parse(raw) as unknown;
+    return parseGameTitlesMap(parsed);
+  } catch {
+    return new Map<string, string>();
+  }
+};
+
+const saveCachedGameTitles = async (titles: Map<string, string>) => {
+  await ensureAssetsStorageReady();
+  const cachePath = path.join(assetsRoot, CACHED_GAME_TITLES_FILE);
+  const payload = Object.fromEntries([...titles.entries()].sort((left, right) => left[0].localeCompare(right[0])));
+  await writeFile(cachePath, JSON.stringify(payload, null, 2));
+};
+
 const listRemoteGames = async (): Promise<RemoteGame[]> => {
   const baseUrl = getConfiguredAssetsBaseUrl();
   const gamesIndexUrl = `${baseUrl}/games/`;
@@ -275,10 +296,11 @@ const listInstalledGames = async () => {
 
 const listInstalledGamesAsRemote = async (): Promise<RemoteGame[]> => {
   const installedGames = await listInstalledGames();
+  const cachedTitles = await loadCachedGameTitles();
   return installedGames.map((slug) => ({
     slug,
     repoFolder: slug,
-    title: titleFromSlug(slug),
+    title: cachedTitles.get(slug) ?? titleFromSlug(slug),
     logoFile: `${slug}.png`,
   }));
 };
@@ -388,6 +410,11 @@ nodecg.listenFor('scoreko-assets:listRemoteGames', async (_payload: unknown, ack
 
   try {
     const remoteGames = await listRemoteGames();
+    const titlesToCache = new Map<string, string>();
+    remoteGames.forEach((game) => {
+      titlesToCache.set(game.slug, game.title);
+    });
+    await saveCachedGameTitles(titlesToCache);
     ack(null, remoteGames);
   } catch (error) {
     try {