fix(server): race condition for sync (#14770)

#### PR Dependency Tree


* **PR #14770** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

## Release Notes

* **New Features**
* Implemented batch processing for calendar synchronization to improve
performance and resource utilization.
* Added distributed locking to prevent concurrent operations in
multi-instance environments.

* **Bug Fixes**
* Improved reliability by preventing duplicate synchronization attempts.

* **Tests**
  * Enhanced test coverage for batch processing and locking mechanisms.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/indexer/__tests__/event.spec.ts

@@ -33,19 +33,37 @@ test('should not index workspace if indexer is disabled', async t => {
   const count = module.queue.count('indexer.indexWorkspace');
 
   // @ts-expect-error ignore missing fields
-  await indexerEvent.indexWorkspace({ id: 'test-workspace' });
+  await indexerEvent.indexWorkspace({
+    workspaceId: 'test-workspace',
+    docId: 'test-workspace',
+  });
 
   t.is(module.queue.count('indexer.indexWorkspace'), count);
 });
 
-test('should index workspace if indexer is enabled', async t => {
+test('should index workspace when root snapshot is updated', async t => {
   // @ts-expect-error ignore missing fields
-  await indexerEvent.indexWorkspace({ id: 'test-workspace' });
+  await indexerEvent.indexWorkspace({
+    workspaceId: 'test-workspace',
+    docId: 'test-workspace',
+  });
 
   const { payload } = await module.queue.waitFor('indexer.indexWorkspace');
   t.is(payload.workspaceId, 'test-workspace');
 });
 
+test('should not index workspace when non-root snapshot is updated', async t => {
+  const count = module.queue.count('indexer.indexWorkspace');
+
+  // @ts-expect-error ignore missing fields
+  await indexerEvent.indexWorkspace({
+    workspaceId: 'test-workspace',
+    docId: 'child-doc',
+  });
+
+  t.is(module.queue.count('indexer.indexWorkspace'), count);
+});
+
 test('should not delete workspace if indexer is disabled', async t => {
   Sinon.stub(config.indexer, 'enabled').value(false);
   const count = module.queue.count('indexer.deleteWorkspace');

packages/backend/server/src/plugins/indexer/event.ts

@@ -29,21 +29,20 @@ export class IndexerEvent {
     );
   }
 
-  @OnEvent('workspace.updated')
-  async indexWorkspace({ id }: Events['workspace.updated']) {
+  @OnEvent('doc.snapshot.updated')
+  async indexWorkspace({ workspaceId, docId }: Events['doc.snapshot.updated']) {
     if (!this.config.indexer.enabled) {
       return;
     }
 
+    if (workspaceId !== docId) {
+      return;
+    }
+
     await this.queue.add(
       'indexer.indexWorkspace',
-      {
-        workspaceId: id,
-      },
-      {
-        jobId: `indexWorkspace/${id}`,
-        priority: 100,
-      }
+      { workspaceId },
+      { jobId: `indexWorkspace/${workspaceId}`, priority: 100 }
     );
   }