WIP: новая схема сообщений и push (не проверено)

shine-UI/js/services/message-store.js

@@ -0,0 +1,50 @@
+const DB_NAME = 'shine-ui-messages-v1';
+const DB_VERSION = 1;
+const STORE_MESSAGES = 'messages';
+
+function openDb() {
+  return new Promise((resolve, reject) => {
+    const request = indexedDB.open(DB_NAME, DB_VERSION);
+    request.onupgradeneeded = () => {
+      const db = request.result;
+      if (!db.objectStoreNames.contains(STORE_MESSAGES)) {
+        const store = db.createObjectStore(STORE_MESSAGES, { keyPath: 'messageKey' });
+        store.createIndex('by_chat', 'chatId', { unique: false });
+        store.createIndex('by_ts', 'ts', { unique: false });
+      }
+    };
+    request.onsuccess = () => resolve(request.result);
+    request.onerror = () => reject(request.error || new Error('IndexedDB open failed'));
+  });
+}
+
+async function withStore(mode, callback) {
+  const db = await openDb();
+  try {
+    return await new Promise((resolve, reject) => {
+      const tx = db.transaction(STORE_MESSAGES, mode);
+      const store = tx.objectStore(STORE_MESSAGES);
+      const result = callback(store, tx);
+      tx.oncomplete = () => resolve(result);
+      tx.onerror = () => reject(tx.error || new Error('IndexedDB transaction failed'));
+      tx.onabort = () => reject(tx.error || new Error('IndexedDB transaction aborted'));
+    });
+  } finally {
+    db.close();
+  }
+}
+
+export async function putStoredMessage(record) {
+  if (!record || !record.messageKey) return;
+  await withStore('readwrite', (store) => {
+    store.put(record);
+  });
+}
+
+export async function listStoredMessages() {
+  return withStore('readonly', (store) => new Promise((resolve, reject) => {
+    const req = store.getAll();
+    req.onsuccess = () => resolve(Array.isArray(req.result) ? req.result : []);
+    req.onerror = () => reject(req.error || new Error('IndexedDB getAll failed'));
+  }));
+}