feat(nbstore): improve nbstore (#9512)

packages/common/nbstore/src/frontend/blob.ts

@@ -3,21 +3,33 @@ import type { BlobSync } from '../sync/blob';
 
 export class BlobFrontend {
   constructor(
-    readonly storage: BlobStorage,
-    readonly sync?: BlobSync
+    public readonly storage: BlobStorage,
+    private readonly sync: BlobSync
   ) {}
 
   get(blobId: string) {
-    return this.sync
-      ? this.sync.downloadBlob(blobId)
-      : this.storage.get(blobId);
+    return this.sync.downloadBlob(blobId);
   }
 
   set(blob: BlobRecord) {
-    return this.sync ? this.sync.uploadBlob(blob) : this.storage.set(blob);
+    return this.sync.uploadBlob(blob);
+  }
+
+  fullSync() {
+    return this.sync.fullSync();
   }
 
   addPriority(_id: string, _priority: number) {
     // not support yet
   }
+
+  readonly state$ = this.sync.state$;
+
+  setMaxBlobSize(max: number) {
+    this.sync.setMaxBlobSize(max);
+  }
+
+  onReachedMaxBlobSize(cb: (byteSize: number) => void): () => void {
+    return this.sync.onReachedMaxBlobSize(cb);
+  }
 }