feat(nbstore): add indexer storage (#10953)

packages/common/nbstore/src/impls/idb/indexer-sync.ts

@@ -0,0 +1,38 @@
+import { share } from '../../connection';
+import type { DocClock } from '../../storage/doc';
+import { IndexerSyncStorageBase } from '../../storage/indexer-sync';
+import { IDBConnection, type IDBConnectionOptions } from './db';
+
+export class IndexedDBIndexerSyncStorage extends IndexerSyncStorageBase {
+  static readonly identifier = 'IndexedDBIndexerSyncStorage';
+
+  readonly connection = share(new IDBConnection(this.options));
+
+  constructor(private readonly options: IDBConnectionOptions) {
+    super();
+  }
+
+  async getDocIndexedClock(docId: string): Promise<DocClock | null> {
+    const tx = this.connection.inner.db.transaction('indexerSync', 'readonly');
+    const store = tx.store;
+    const result = await store.get(docId);
+    return result
+      ? { docId: result.docId, timestamp: result.indexedClock }
+      : null;
+  }
+
+  async setDocIndexedClock(docClock: DocClock): Promise<void> {
+    const tx = this.connection.inner.db.transaction('indexerSync', 'readwrite');
+    const store = tx.store;
+    await store.put({
+      docId: docClock.docId,
+      indexedClock: docClock.timestamp,
+    });
+  }
+
+  async clearDocIndexedClock(docId: string): Promise<void> {
+    const tx = this.connection.inner.db.transaction('indexerSync', 'readwrite');
+    const store = tx.store;
+    await store.delete(docId);
+  }
+}