feat(nbstore): add awareness storage&sync&frontend (#9016)

packages/common/nbstore/src/sync/awareness/index.ts

@@ -0,0 +1,30 @@
+import type {
+  AwarenessRecord,
+  AwarenessStorage,
+} from '../../storage/awareness';
+
+export class AwarenessSync {
+  constructor(
+    readonly local: AwarenessStorage,
+    readonly remotes: AwarenessStorage[]
+  ) {}
+
+  async update(record: AwarenessRecord, origin?: string) {
+    await Promise.all(
+      [this.local, ...this.remotes].map(peer => peer.update(record, origin))
+    );
+  }
+
+  subscribeUpdate(
+    id: string,
+    onUpdate: (update: AwarenessRecord, origin?: string) => void,
+    onCollect: () => AwarenessRecord
+  ): () => void {
+    const unsubscribes = [this.local, ...this.remotes].map(peer =>
+      peer.subscribeUpdate(id, onUpdate, onCollect)
+    );
+    return () => {
+      unsubscribes.forEach(unsubscribe => unsubscribe());
+    };
+  }
+}

packages/common/nbstore/src/sync/blob/index.ts

@@ -3,7 +3,7 @@ import { difference } from 'lodash-es';
 import type { BlobRecord, BlobStorage } from '../../storage';
 import { MANUALLY_STOP, throwIfAborted } from '../../utils/throw-if-aborted';
 
-export class BlobSyncEngine {
+export class BlobSync {
   private abort: AbortController | null = null;
 
   constructor(

packages/common/nbstore/src/sync/doc/index.ts

@@ -1,7 +1,7 @@
 import type { DocStorage, SyncStorage } from '../../storage';
 import { DocSyncPeer } from './peer';
 
-export class DocSyncEngine {
+export class DocSync {
   private readonly peers: DocSyncPeer[];
   private abort: AbortController | null = null;
 

packages/common/nbstore/src/sync/index.ts

@@ -1,10 +1,10 @@
 import type { BlobStorage, DocStorage, SpaceStorage } from '../storage';
-import { BlobSyncEngine } from './blob';
-import { DocSyncEngine } from './doc';
+import { BlobSync } from './blob';
+import { DocSync } from './doc';
 
-export class SyncEngine {
-  private readonly doc: DocSyncEngine | null;
-  private readonly blob: BlobSyncEngine | null;
+export class Sync {
+  private readonly doc: DocSync | null;
+  private readonly blob: BlobSync | null;
 
   constructor(
     readonly local: SpaceStorage,
@@ -16,7 +16,7 @@ export class SyncEngine {
 
     this.doc =
       doc && sync
-        ? new DocSyncEngine(
+        ? new DocSync(
             doc,
             sync,
             peers
@@ -25,7 +25,7 @@ export class SyncEngine {
           )
         : null;
     this.blob = blob
-      ? new BlobSyncEngine(
+      ? new BlobSync(
           blob,
           peers
             .map(peer => peer.tryGet('blob'))