Function openChatCacheDb

app/src/modules/chat-cache.js:11–34

()

let chatCacheDbPromise = null;

export function openChatCacheDb() {
  if (chatCacheDbPromise) return chatCacheDbPromise;
  chatCacheDbPromise = new Promise((resolve, reject) => {
    if (typeof indexedDB === 'undefined') {
      reject(new Error('IndexedDB unavailable'));
      return;
    }
    const req = indexedDB.open(CHAT_CACHE_DB, 1);
    req.onerror = () => reject(req.error || new Error('Failed to open chat cache'));
    req.onupgradeneeded = () => {
      const db = req.result;
      if (!db.objectStoreNames.contains(CHAT_CACHE_STORE)) {
        const store = db.createObjectStore(CHAT_CACHE_STORE, { keyPath: 'cacheKey' });
        store.createIndex('updatedAt', 'updatedAt', { unique: false });
      }
    };
    req.onsuccess = () => resolve(req.result);
  }).catch(err => {
    console.warn('[chat-cache]', err);
    chatCacheDbPromise = null;
    throw err;
  });
  return chatCacheDbPromise;
}

export async function chatCacheRead(cacheKey) {
  const db = await openChatCacheDb();