feat(core): run indexer in worker (#7418)

.github/helm/affine/templates/ingress.yaml

@@ -74,4 +74,11 @@ spec:
                 name: affine-web
                 port:
                   number: {{ .Values.web.service.port }}
+          - path: /js/worker.(.+).js
+            pathType: ImplementationSpecific
+            backend:
+              service:
+                name: affine-web
+                port:
+                  number: {{ .Values.web.service.port }}
 {{- end }}

packages/common/infra/package.json

@@ -2,6 +2,7 @@
   "name": "@toeverything/infra",
   "type": "module",
   "private": true,
+  "sideEffects": false,
   "exports": {
     "./blocksuite": "./src/blocksuite/index.ts",
     "./storage": "./src/storage/index.ts",

packages/common/infra/src/livedata/ops.ts

@@ -18,6 +18,7 @@ import {
   timer,
 } from 'rxjs';
 
+import { MANUALLY_STOP } from '../utils';
 import type { LiveData } from './livedata';
 
 /**
@@ -107,7 +108,8 @@ export function fromPromise<T>(
       .catch(error => {
         subscriber.error(error);
       });
-    return () => abortController.abort('Aborted');
+
+    return () => abortController.abort(MANUALLY_STOP);
   });
 }
 

packages/common/infra/src/sync/blob/blob.ts

@@ -4,6 +4,7 @@ import { difference } from 'lodash-es';
 
 import { LiveData } from '../../livedata';
 import type { Memento } from '../../storage';
+import { MANUALLY_STOP } from '../../utils';
 import { BlobStorageOverCapacity } from './error';
 
 const logger = new DebugLogger('affine:blob-engine');
@@ -70,7 +71,7 @@ export class BlobEngine {
   }
 
   stop() {
-    this.abort?.abort();
+    this.abort?.abort(MANUALLY_STOP);
     this.abort = null;
   }
 

packages/common/infra/src/sync/doc/old-id.md

@@ -0,0 +1,24 @@
+AFFiNE currently has a lot of data stored using the old ID format. Here, we record the usage of IDs to avoid forgetting.
+
+## Old ID Format
+
+The format is:
+
+- `{workspace-id}:space:{nanoid}` Common
+- `{workspace-id}:space:page:{nanoid}`
+
+> Note: sometimes the `workspace-id` is not same with current workspace id.
+
+## Usage
+
+- Local Storage
+  - indexeddb: Both new and old IDs coexist
+  - sqlite: Both new and old IDs coexist
+  - server-clock: Only new IDs are stored
+  - sync-metadata: Both new and old IDs coexist
+- Server Storage
+  - Only stores new IDs but accepts writes using old IDs
+- Protocols
+  - When the client submits an update, both new and old IDs are used.
+  - When the server broadcasts updates sent by other clients, both new and old IDs are used.
+  - When the server responds to `client-pre-sync` (listing all updated docids), only new IDs are used.

packages/common/infra/src/sync/indexer/indexer.ts

@@ -20,6 +20,9 @@ export interface IndexWriter<S extends Schema>
 
   delete(id: string): void;
 
+  // TODO(@eyhn)
+  // deleteByQuery(query: Query<S>): void;
+
   commit(): Promise<void>;
 
   rollback(): void;

packages/common/infra/src/sync/job/impl/indexeddb/index.ts

@@ -155,6 +155,9 @@ export class IndexedDBJobQueue<J> implements JobQueue<J> {
         .objectStore('jobs')
         .delete(typeof id === 'string' ? parseInt(id) : id);
     }
+
+    trx.commit();
+    this.broadcast.postMessage('job-completed');
   }
 
   async return(jobs: Job[], retry: boolean = false): Promise<void> {
@@ -174,6 +177,10 @@ export class IndexedDBJobQueue<J> implements JobQueue<J> {
           .delete(typeof id === 'string' ? parseInt(id) : id);
       }
     }
+
+    trx.commit();
+
+    this.broadcast.postMessage('job-completed');
   }
 
   async clear(): Promise<void> {

packages/common/infra/src/sync/job/runner.ts

@@ -29,7 +29,7 @@ export class JobRunner<J> {
   }
 
   stop() {
-    this.abort?.abort();
+    this.abort?.abort(MANUALLY_STOP);
     this.abort = null;
   }
 

packages/frontend/core/src/modules/cloud/services/fetch.ts

@@ -41,8 +41,8 @@ export class FetchService extends Service {
       throw externalSignal.reason;
     }
     const abortController = new AbortController();
-    externalSignal?.addEventListener('abort', () => {
-      abortController.abort();
+    externalSignal?.addEventListener('abort', reason => {
+      abortController.abort(reason);
     });
 
     const timeout = init?.timeout ?? 15000;

packages/frontend/core/src/modules/docs-search/entities/docs-indexer.ts

@@ -1,32 +1,32 @@
 import { DebugLogger } from '@affine/debug';
-import type { AffineTextAttributes } from '@blocksuite/blocks';
-import type { DeltaInsert } from '@blocksuite/inline';
 import type { Job, JobQueue, WorkspaceService } from '@toeverything/infra';
 import {
-  Document,
   Entity,
   IndexedDBIndexStorage,
   IndexedDBJobQueue,
   JobRunner,
   LiveData,
 } from '@toeverything/infra';
-import { difference } from 'lodash-es';
 import { map } from 'rxjs';
-import { Array as YArray, Map as YMap, type Text as YText } from 'yjs';
-import { applyUpdate, Doc as YDoc } from 'yjs';
 
-import {
-  type BlockIndexSchema,
-  blockIndexSchema,
-  docIndexSchema,
-} from '../schema';
+import { blockIndexSchema, docIndexSchema } from '../schema';
+import { createWorker, type IndexerWorker } from '../worker/out-worker';
+
+export function isEmptyUpdate(binary: Uint8Array) {
+  return (
+    binary.byteLength === 0 ||
+    (binary.byteLength === 2 && binary[0] === 0 && binary[1] === 0)
+  );
+}
 
 const logger = new DebugLogger('crawler');
 
 interface IndexerJobPayload {
   docId: string;
+  storageDocId: string;
 }
 
+// TODO(@eyhn): simplify this, it's too complex
 export class DocsIndexer extends Entity {
   private readonly jobQueue: JobQueue<IndexerJobPayload> =
     new IndexedDBJobQueue<IndexerJobPayload>(
@@ -51,6 +51,8 @@ export class DocsIndexer extends Entity {
 
   private readonly workspaceId = this.workspaceService.workspace.id;
 
+  private worker: IndexerWorker | null = null;
+
   readonly status$ = LiveData.from<{ remaining?: number }>(
     this.jobQueue.status$.pipe(
       map(status => ({
@@ -67,13 +69,13 @@ export class DocsIndexer extends Entity {
   setupListener() {
     this.workspaceEngine.doc.storage.eventBus.on(event => {
       if (event.clientId === this.workspaceEngine.doc.clientId) {
-        const docId = event.docId;
+        const docId = normalizeDocId(event.docId);
 
         this.jobQueue
           .enqueue([
             {
               batchKey: docId,
-              payload: { docId },
+              payload: { docId, storageDocId: event.docId },
             },
           ])
           .catch(err => {
@@ -83,23 +85,140 @@ export class DocsIndexer extends Entity {
     });
   }
 
-  async execJob(jobs: Job<IndexerJobPayload>[], _signal: AbortSignal) {
+  async execJob(jobs: Job<IndexerJobPayload>[], signal: AbortSignal) {
     if (jobs.length === 0) {
       return;
     }
 
     // jobs should have the same docId, so we just pick the first one
     const docId = jobs[0].payload.docId;
+    const storageDocId = jobs[0].payload.storageDocId;
+
+    const worker = await this.ensureWorker(signal);
 
     const startTime = performance.now();
     logger.debug('Start crawling job for docId:', docId);
 
-    if (docId) {
-      if (docId === this.workspaceId) {
-        await this.crawlingRootDocData();
-      } else {
-        await this.crawlingDocData(docId);
+    let workerOutput;
+
+    if (docId === this.workspaceId) {
+      const rootDocBuffer =
+        await this.workspaceEngine.doc.storage.loadDocFromLocal(
+          this.workspaceId
+        );
+
+      if (!rootDocBuffer) {
+        return;
       }
+
+      const allIndexedDocs = (
+        await this.docIndex.search(
+          {
+            type: 'all',
+          },
+          {
+            pagination: {
+              limit: Number.MAX_SAFE_INTEGER,
+              skip: 0,
+            },
+          }
+        )
+      ).nodes.map(n => n.id);
+
+      workerOutput = await worker.run({
+        type: 'rootDoc',
+        allIndexedDocs,
+        rootDocBuffer,
+      });
+    } else {
+      const rootDocBuffer =
+        await this.workspaceEngine.doc.storage.loadDocFromLocal(
+          this.workspaceId
+        );
+
+      const docBuffer =
+        (await this.workspaceEngine.doc.storage.loadDocFromLocal(
+          storageDocId
+        )) ?? new Uint8Array(0);
+
+      if (!rootDocBuffer) {
+        return;
+      }
+
+      workerOutput = await worker.run({
+        type: 'doc',
+        docBuffer,
+        docId,
+        rootDocBuffer,
+      });
+    }
+
+    if (workerOutput.deletedDoc || workerOutput.addedDoc) {
+      if (workerOutput.deletedDoc) {
+        const docIndexWriter = await this.docIndex.write();
+        for (const docId of workerOutput.deletedDoc) {
+          docIndexWriter.delete(docId);
+        }
+        await docIndexWriter.commit();
+        const blockIndexWriter = await this.blockIndex.write();
+        for (const docId of workerOutput.deletedDoc) {
+          const oldBlocks = await blockIndexWriter.search(
+            {
+              type: 'match',
+              field: 'docId',
+              match: docId,
+            },
+            {
+              pagination: {
+                limit: Number.MAX_SAFE_INTEGER,
+              },
+            }
+          );
+          for (const block of oldBlocks.nodes) {
+            docIndexWriter.delete(block.id);
+          }
+        }
+        await blockIndexWriter.commit();
+      }
+      if (workerOutput.addedDoc) {
+        const docIndexWriter = await this.docIndex.write();
+        for (const { doc } of workerOutput.addedDoc) {
+          docIndexWriter.put(doc);
+        }
+        await docIndexWriter.commit();
+        const blockIndexWriter = await this.blockIndex.write();
+        for (const { blocks } of workerOutput.addedDoc) {
+          // delete old blocks
+          const oldBlocks = await blockIndexWriter.search(
+            {
+              type: 'match',
+              field: 'docId',
+              match: docId,
+            },
+            {
+              pagination: {
+                limit: Number.MAX_SAFE_INTEGER,
+              },
+            }
+          );
+          for (const block of oldBlocks.nodes) {
+            blockIndexWriter.delete(block.id);
+          }
+          for (const block of blocks) {
+            blockIndexWriter.insert(block);
+          }
+        }
+        await blockIndexWriter.commit();
+      }
+    }
+
+    if (workerOutput.reindexDoc) {
+      await this.jobQueue.enqueue(
+        workerOutput.reindexDoc.map(({ docId, storageDocId }) => ({
+          batchKey: docId,
+          payload: { docId, storageDocId },
+        }))
+      );
     }
 
     const duration = performance.now() - startTime;
@@ -114,7 +233,7 @@ export class DocsIndexer extends Entity {
       .enqueue([
         {
           batchKey: this.workspaceId,
-          payload: { docId: this.workspaceId },
+          payload: { docId: this.workspaceId, storageDocId: this.workspaceId },
         },
       ])
       .catch(err => {
@@ -122,341 +241,58 @@ export class DocsIndexer extends Entity {
       });
   }
 
-  async crawlingDocData(docId: string) {
-    const rootDocBuffer =
-      await this.workspaceEngine.doc.storage.loadDocFromLocal(this.workspaceId);
-
-    if (!rootDocBuffer) {
-      return;
-    }
-
-    const yRootDoc = new YDoc();
-    applyUpdate(yRootDoc, rootDocBuffer);
-
-    const docStoragePossibleIds = Array.from(yRootDoc.getSubdocs())
-      .map(doc => doc.guid)
-      .filter(id => id.endsWith(docId));
-
-    let docBuffer;
-
-    for (const id of docStoragePossibleIds) {
-      docBuffer = await this.workspaceEngine.doc.storage.loadDocFromLocal(id);
-
-      if (docBuffer) {
-        break;
-      }
-    }
-
-    if (!docBuffer) {
-      return;
-    }
-
-    const ydoc = new YDoc();
-
-    applyUpdate(ydoc, docBuffer);
-
-    let docExists: boolean | null = null;
-
-    (
-      yRootDoc.getMap('meta').get('pages') as YArray<YMap<any>> | undefined
-    )?.forEach(page => {
-      if (page.get('id') === docId) {
-        docExists = !(page.get('trash') ?? false);
-      }
-    });
-
-    if (!docExists) {
-      const indexWriter = await this.docIndex.write();
-      indexWriter.delete(docId);
-      await indexWriter.commit();
-
-      const blockIndexWriter = await this.blockIndex.write();
-      const oldBlocks = await blockIndexWriter.search(
-        {
-          type: 'match',
-          field: 'docId',
-          match: docId,
-        },
-        {
-          pagination: {
-            limit: Number.MAX_SAFE_INTEGER,
-          },
-        }
-      );
-      for (const block of oldBlocks.nodes) {
-        blockIndexWriter.delete(block.id);
-      }
-      await blockIndexWriter.commit();
-    } else {
-      const blocks = ydoc.getMap<any>('blocks');
-
-      if (blocks.size === 0) {
-        return;
-      }
-
-      let docTitle = '';
-
-      const blockDocuments: Document<typeof blockIndexSchema>[] = [];
-
-      for (const block of blocks.values()) {
-        const flavour = block.get('sys:flavour')?.toString();
-        const blockId = block.get('sys:id')?.toString();
-
-        if (!flavour || !blockId) {
-          continue;
-        }
-
-        if (flavour === 'affine:page') {
-          docTitle = block.get('prop:title').toString();
-          blockDocuments.push(
-            Document.from(`${docId}:${blockId}`, {
-              docId,
-              flavour,
-              blockId,
-              content: docTitle,
-            })
-          );
-        }
-
-        if (
-          flavour === 'affine:paragraph' ||
-          flavour === 'affine:list' ||
-          flavour === 'affine:code'
-        ) {
-          const text = block.get('prop:text') as YText;
-          if (!text) {
-            continue;
-          }
-
-          const deltas: DeltaInsert<AffineTextAttributes>[] = text.toDelta();
-          const ref = deltas
-            .map(delta => {
-              if (
-                delta.attributes &&
-                delta.attributes.reference &&
-                delta.attributes.reference.pageId
-              ) {
-                return delta.attributes.reference.pageId;
-              }
-              return null;
-            })
-            .filter((link): link is string => !!link);
-
-          blockDocuments.push(
-            Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
-              docId,
-              flavour,
-              blockId,
-              content: text.toString(),
-              ref,
-            })
-          );
-        }
-
-        if (
-          flavour === 'affine:embed-linked-doc' ||
-          flavour === 'affine:embed-synced-doc'
-        ) {
-          const pageId = block.get('prop:pageId');
-          if (typeof pageId === 'string') {
-            blockDocuments.push(
-              Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
-                docId,
-                flavour,
-                blockId,
-                ref: pageId,
-              })
-            );
-          }
-        }
-
-        if (flavour === 'affine:attachment' || flavour === 'affine:image') {
-          const blobId = block.get('prop:sourceId');
-          if (typeof blobId === 'string') {
-            blockDocuments.push(
-              Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
-                docId,
-                flavour,
-                blockId,
-                blob: [blobId],
-              })
-            );
-          }
-        }
-
-        if (flavour === 'affine:surface') {
-          const texts = [];
-
-          const elementsObj = block.get('prop:elements');
-          if (
-            !(
-              elementsObj instanceof YMap &&
-              elementsObj.get('type') === '$blocksuite:internal:native$'
-            )
-          ) {
-            continue;
-          }
-          const elements = elementsObj.get('value') as YMap<any>;
-          if (!(elements instanceof YMap)) {
-            continue;
-          }
-
-          for (const element of elements.values()) {
-            if (!(element instanceof YMap)) {
-              continue;
-            }
-            const text = element.get('text') as YText;
-            if (!text) {
-              continue;
-            }
-
-            texts.push(text.toString());
-          }
-
-          blockDocuments.push(
-            Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
-              docId,
-              flavour,
-              blockId,
-              content: texts,
-            })
-          );
-        }
-
-        if (flavour === 'affine:database') {
-          const texts = [];
-          const columnsObj = block.get('prop:columns');
-          if (!(columnsObj instanceof YArray)) {
-            continue;
-          }
-          for (const column of columnsObj) {
-            if (!(column instanceof YMap)) {
-              continue;
-            }
-            if (typeof column.get('name') === 'string') {
-              texts.push(column.get('name'));
-            }
-
-            const data = column.get('data');
-            if (!(data instanceof YMap)) {
-              continue;
-            }
-            const options = data.get('options');
-            if (!(options instanceof YArray)) {
-              continue;
-            }
-            for (const option of options) {
-              if (!(option instanceof YMap)) {
-                continue;
-              }
-              const value = option.get('value');
-              if (typeof value === 'string') {
-                texts.push(value);
-              }
-            }
-          }
-
-          blockDocuments.push(
-            Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
-              docId,
-              flavour,
-              blockId,
-              content: texts,
-            })
-          );
-        }
-      }
-
-      const docIndexWriter = await this.docIndex.write();
-      docIndexWriter.put(
-        Document.from<typeof docIndexSchema>(docId, {
-          title: docTitle,
-        })
-      );
-      await docIndexWriter.commit();
-
-      const blockIndexWriter = await this.blockIndex.write();
-      const oldBlocks = await blockIndexWriter.search(
-        {
-          type: 'match',
-          field: 'docId',
-          match: docId,
-        },
-        {
-          pagination: {
-            limit: Number.MAX_SAFE_INTEGER,
-          },
-        }
-      );
-      for (const block of oldBlocks.nodes) {
-        blockIndexWriter.delete(block.id);
-      }
-      for (const block of blockDocuments) {
-        blockIndexWriter.insert(block);
-      }
-      await blockIndexWriter.commit();
+  async ensureWorker(signal: AbortSignal): Promise<IndexerWorker> {
+    if (!this.worker) {
+      this.worker = await createWorker(signal);
     }
+    return this.worker;
   }
 
-  async crawlingRootDocData() {
-    const buffer = await this.workspaceEngine.doc.storage.loadDocFromLocal(
-      this.workspaceId
-    );
-    if (!buffer) {
-      return;
-    }
-
-    const ydoc = new YDoc();
-
-    applyUpdate(ydoc, buffer);
-
-    const docs = ydoc.getMap('meta').get('pages') as
-      | YArray<YMap<any>>
-      | undefined;
-
-    if (!docs) {
-      return;
-    }
-
-    const availableDocs = [];
-
-    for (const page of docs) {
-      const docId = page.get('id');
-
-      if (typeof docId !== 'string') {
-        continue;
-      }
-
-      const inTrash = page.get('trash') ?? false;
-
-      if (!inTrash) {
-        availableDocs.push(docId);
-      }
-    }
-
-    // a hack to get all docs in index
-    const allIndexedDocs = (
-      await this.docIndex.search(
-        {
-          type: 'all',
-        },
-        {
-          pagination: {
-            limit: Number.MAX_SAFE_INTEGER,
-            skip: 0,
-          },
-        }
-      )
-    ).nodes.map(n => n.id);
-
-    const needDelete = difference(allIndexedDocs, availableDocs);
-    const needAdd = difference(availableDocs, allIndexedDocs);
-
-    await this.jobQueue.enqueue(
-      [...needAdd, ...needDelete].map(docId => ({
-        batchKey: docId,
-        payload: { docId },
-      }))
-    );
+  override dispose(): void {
+    this.runner.stop();
+  }
+}
+
+function normalizeDocId(raw: string) {
+  enum DocVariant {
+    Workspace = 'workspace',
+    Page = 'page',
+    Space = 'space',
+    Settings = 'settings',
+    Unknown = 'unknown',
+  }
+
+  try {
+    if (!raw.length) {
+      throw new Error('Invalid Empty Doc ID');
+    }
+
+    let parts = raw.split(':');
+
+    if (parts.length > 3) {
+      // special adapt case `wsId:space:page:pageId`
+      if (parts[1] === DocVariant.Space && parts[2] === DocVariant.Page) {
+        parts = [parts[0], DocVariant.Space, parts[3]];
+      } else {
+        throw new Error(`Invalid format of Doc ID: ${raw}`);
+      }
+    } else if (parts.length === 2) {
+      // `${variant}:${guid}`
+      throw new Error('not supported');
+    } else if (parts.length === 1) {
+      // ${ws} or ${pageId}
+      parts = ['', DocVariant.Unknown, parts[0]];
+    }
+
+    const docId = parts.at(2);
+
+    if (!docId) {
+      throw new Error('ID is required');
+    }
+
+    return docId;
+  } catch (err) {
+    logger.error('Error on normalize docId ' + raw, err);
+    return raw;
   }
 }

packages/frontend/core/src/modules/docs-search/services/docs-search.ts

@@ -419,4 +419,8 @@ export class DocsSearchService extends Service {
     const title = doc?.get('title');
     return typeof title === 'string' ? title : title?.[0];
   }
+
+  override dispose(): void {
+    this.indexer.dispose();
+  }
 }

packages/frontend/core/src/modules/docs-search/worker/in-worker.ts

@@ -0,0 +1,313 @@
+import type { AffineTextAttributes } from '@blocksuite/blocks';
+import type { DeltaInsert } from '@blocksuite/inline';
+import { Document } from '@toeverything/infra';
+import { difference } from 'lodash-es';
+import {
+  applyUpdate,
+  Array as YArray,
+  Doc as YDoc,
+  Map as YMap,
+  type Text as YText,
+} from 'yjs';
+
+import type { BlockIndexSchema, docIndexSchema } from '../schema';
+import type {
+  WorkerIngoingMessage,
+  WorkerInput,
+  WorkerOutgoingMessage,
+  WorkerOutput,
+} from './types';
+
+function crawlingDocData({
+  docBuffer,
+  docId,
+  rootDocBuffer,
+}: WorkerInput & { type: 'doc' }): WorkerOutput {
+  const yRootDoc = new YDoc();
+  applyUpdate(yRootDoc, rootDocBuffer);
+
+  const ydoc = new YDoc();
+
+  applyUpdate(ydoc, docBuffer);
+
+  let docExists: boolean | null = null;
+
+  (
+    yRootDoc.getMap('meta').get('pages') as YArray<YMap<any>> | undefined
+  )?.forEach(page => {
+    if (page.get('id') === docId) {
+      docExists = !(page.get('trash') ?? false);
+    }
+  });
+
+  if (!docExists) {
+    return {
+      deletedDoc: [docId],
+    };
+  } else {
+    const blocks = ydoc.getMap<any>('blocks');
+
+    if (blocks.size === 0) {
+      return {};
+    }
+
+    let docTitle = '';
+
+    const blockDocuments: Document<BlockIndexSchema>[] = [];
+
+    for (const block of blocks.values()) {
+      const flavour = block.get('sys:flavour')?.toString();
+      const blockId = block.get('sys:id')?.toString();
+
+      if (!flavour || !blockId) {
+        continue;
+      }
+
+      if (flavour === 'affine:page') {
+        docTitle = block.get('prop:title').toString();
+        blockDocuments.push(
+          Document.from(`${docId}:${blockId}`, {
+            docId,
+            flavour,
+            blockId,
+            content: docTitle,
+          })
+        );
+      }
+
+      if (
+        flavour === 'affine:paragraph' ||
+        flavour === 'affine:list' ||
+        flavour === 'affine:code'
+      ) {
+        const text = block.get('prop:text') as YText;
+        if (!text) {
+          continue;
+        }
+
+        const deltas: DeltaInsert<AffineTextAttributes>[] = text.toDelta();
+        const ref = deltas
+          .map(delta => {
+            if (
+              delta.attributes &&
+              delta.attributes.reference &&
+              delta.attributes.reference.pageId
+            ) {
+              return delta.attributes.reference.pageId;
+            }
+            return null;
+          })
+          .filter((link): link is string => !!link);
+
+        blockDocuments.push(
+          Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+            docId,
+            flavour,
+            blockId,
+            content: text.toString(),
+            ref,
+          })
+        );
+      }
+
+      if (
+        flavour === 'affine:embed-linked-doc' ||
+        flavour === 'affine:embed-synced-doc'
+      ) {
+        const pageId = block.get('prop:pageId');
+        if (typeof pageId === 'string') {
+          blockDocuments.push(
+            Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+              docId,
+              flavour,
+              blockId,
+              ref: pageId,
+            })
+          );
+        }
+      }
+
+      if (flavour === 'affine:attachment' || flavour === 'affine:image') {
+        const blobId = block.get('prop:sourceId');
+        if (typeof blobId === 'string') {
+          blockDocuments.push(
+            Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+              docId,
+              flavour,
+              blockId,
+              blob: [blobId],
+            })
+          );
+        }
+      }
+
+      if (flavour === 'affine:surface') {
+        const texts = [];
+
+        const elementsObj = block.get('prop:elements');
+        if (
+          !(
+            elementsObj instanceof YMap &&
+            elementsObj.get('type') === '$blocksuite:internal:native$'
+          )
+        ) {
+          continue;
+        }
+        const elements = elementsObj.get('value') as YMap<any>;
+        if (!(elements instanceof YMap)) {
+          continue;
+        }
+
+        for (const element of elements.values()) {
+          if (!(element instanceof YMap)) {
+            continue;
+          }
+          const text = element.get('text') as YText;
+          if (!text) {
+            continue;
+          }
+
+          texts.push(text.toString());
+        }
+
+        blockDocuments.push(
+          Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+            docId,
+            flavour,
+            blockId,
+            content: texts,
+          })
+        );
+      }
+
+      if (flavour === 'affine:database') {
+        const texts = [];
+        const columnsObj = block.get('prop:columns');
+        if (!(columnsObj instanceof YArray)) {
+          continue;
+        }
+        for (const column of columnsObj) {
+          if (!(column instanceof YMap)) {
+            continue;
+          }
+          if (typeof column.get('name') === 'string') {
+            texts.push(column.get('name'));
+          }
+
+          const data = column.get('data');
+          if (!(data instanceof YMap)) {
+            continue;
+          }
+          const options = data.get('options');
+          if (!(options instanceof YArray)) {
+            continue;
+          }
+          for (const option of options) {
+            if (!(option instanceof YMap)) {
+              continue;
+            }
+            const value = option.get('value');
+            if (typeof value === 'string') {
+              texts.push(value);
+            }
+          }
+        }
+
+        blockDocuments.push(
+          Document.from<BlockIndexSchema>(`${docId}:${blockId}`, {
+            docId,
+            flavour,
+            blockId,
+            content: texts,
+          })
+        );
+      }
+    }
+
+    return {
+      addedDoc: [
+        {
+          id: docId,
+          doc: Document.from<typeof docIndexSchema>(docId, {
+            title: docTitle,
+          }),
+          blocks: blockDocuments,
+        },
+      ],
+    };
+  }
+}
+
+function crawlingRootDocData({
+  allIndexedDocs,
+  rootDocBuffer,
+}: WorkerInput & {
+  type: 'rootDoc';
+}): WorkerOutput {
+  const ydoc = new YDoc();
+
+  applyUpdate(ydoc, rootDocBuffer);
+
+  const docs = ydoc.getMap('meta').get('pages') as
+    | YArray<YMap<any>>
+    | undefined;
+
+  if (!docs) {
+    return {};
+  }
+
+  const availableDocs = [];
+
+  for (const page of docs) {
+    const docId = page.get('id');
+
+    if (typeof docId !== 'string') {
+      continue;
+    }
+
+    const inTrash = page.get('trash') ?? false;
+
+    if (!inTrash) {
+      availableDocs.push(docId);
+    }
+  }
+
+  const needDelete = difference(allIndexedDocs, availableDocs);
+  const needAdd = difference(availableDocs, allIndexedDocs);
+
+  return {
+    reindexDoc: [...needAdd, ...needDelete].map(docId => ({
+      docId,
+      storageDocId: ydoc.getMap<YDoc>('spaces').get(docId)?.guid ?? docId,
+    })),
+  };
+}
+
+globalThis.onmessage = (event: MessageEvent<WorkerIngoingMessage>) => {
+  const message = event.data;
+  if (message.type === 'init') {
+    postMessage({ type: 'init', msgId: message.msgId });
+    return;
+  }
+  if (message.type === 'run') {
+    const { input } = message;
+    try {
+      let data;
+      if (input.type === 'rootDoc') {
+        data = crawlingRootDocData(input);
+      } else {
+        data = crawlingDocData(input);
+      }
+
+      postMessage({ type: 'done', msgId: message.msgId, output: data });
+    } catch (error) {
+      postMessage({
+        type: 'failed',
+        msgId: message.msgId,
+        error: error instanceof Error ? error.message : error + '',
+      });
+    }
+  }
+};
+
+declare function postMessage(message: WorkerOutgoingMessage): void;

packages/frontend/core/src/modules/docs-search/worker/out-worker.ts

@@ -0,0 +1,104 @@
+import { DebugLogger } from '@affine/debug';
+import { MANUALLY_STOP, throwIfAborted } from '@toeverything/infra';
+
+import type {
+  WorkerIngoingMessage,
+  WorkerInput,
+  WorkerOutgoingMessage,
+  WorkerOutput,
+} from './types';
+
+const logger = new DebugLogger('affine:indexer-worker');
+
+export async function createWorker(abort: AbortSignal) {
+  let worker: Worker | null = null;
+  while (throwIfAborted(abort)) {
+    try {
+      worker = await new Promise<Worker>((resolve, reject) => {
+        // @TODO(@forehalo): need to make a general worker
+        const worker = new Worker(
+          /* webpackChunkName: "worker" */ new URL(
+            './in-worker.ts',
+            import.meta.url
+          )
+        );
+        worker.addEventListener('error', reject);
+        worker.addEventListener('message', event => {
+          if (event.data.type === 'init') {
+            resolve(worker);
+          }
+        });
+        worker.postMessage({ type: 'init', msgId: 0 } as WorkerIngoingMessage);
+        setTimeout(() => {
+          reject('timeout');
+        }, 1000 * 30 /* 30 sec */);
+      });
+    } catch (err) {
+      logger.debug(
+        `Indexer worker init failed, ${err}, will retry in 5 seconds.`
+      );
+      await new Promise(resolve => setTimeout(resolve, 5000));
+    }
+    if (worker) {
+      break;
+    }
+  }
+
+  if (!worker) {
+    // never reach here
+    throw new Error('Worker is not created');
+  }
+
+  const terminateAbort = new AbortController();
+
+  let msgId = 1;
+
+  return {
+    run: async (input: WorkerInput) => {
+      const dispose: (() => void)[] = [];
+      return new Promise<WorkerOutput>((resolve, reject) => {
+        const currentMsgId = msgId++;
+        const msgHandler = (event: MessageEvent<WorkerOutgoingMessage>) => {
+          if (event.data.msgId === currentMsgId) {
+            if (event.data.type === 'done') {
+              resolve(event.data.output);
+            } else if (event.data.type === 'failed') {
+              reject(new Error(event.data.error));
+            } else {
+              reject(new Error('Unknown message type'));
+            }
+          }
+        };
+        const abortHandler = (reason: any) => {
+          reject(reason);
+        };
+
+        worker.addEventListener('message', msgHandler);
+        dispose.push(() => {
+          worker?.removeEventListener('message', msgHandler);
+        });
+
+        terminateAbort.signal.addEventListener('abort', abortHandler);
+        dispose.push(() => {
+          terminateAbort.signal.removeEventListener('abort', abortHandler);
+        });
+
+        worker.postMessage({
+          type: 'run',
+          msgId: currentMsgId,
+          input,
+        } as WorkerIngoingMessage);
+      }).finally(() => {
+        for (const d of dispose) {
+          d();
+        }
+      });
+    },
+    dispose: () => {
+      worker.terminate();
+      terminateAbort.abort(MANUALLY_STOP);
+    },
+  };
+}
+
+export type IndexerWorker = Awaited<ReturnType<typeof createWorker>>;

packages/frontend/core/src/modules/docs-search/worker/types.ts

@@ -0,0 +1,50 @@
+import type { Document } from '@toeverything/infra';
+
+import type { BlockIndexSchema, DocIndexSchema } from '../schema';
+
+export type WorkerIngoingMessage = (
+  | {
+      type: 'init';
+    }
+  | {
+      type: 'run';
+      input: WorkerInput;
+    }
+) & { msgId: number };
+
+export type WorkerOutgoingMessage = (
+  | {
+      type: 'init';
+    }
+  | {
+      type: 'done';
+      output: WorkerOutput;
+    }
+  | {
+      type: 'failed';
+      error: string;
+    }
+) & { msgId: number };
+
+export type WorkerInput =
+  | {
+      type: 'rootDoc';
+      rootDocBuffer: Uint8Array;
+      allIndexedDocs: string[];
+    }
+  | {
+      type: 'doc';
+      docId: string;
+      rootDocBuffer: Uint8Array;
+      docBuffer: Uint8Array;
+    };
+
+export interface WorkerOutput {
+  reindexDoc?: { docId: string; storageDocId: string }[];
+  addedDoc?: {
+    id: string;
+    blocks: Document<BlockIndexSchema>[];
+    doc: Document<DocIndexSchema>;
+  }[];
+  deletedDoc?: string[];
+}

tools/cli/src/webpack/config.ts

@@ -112,10 +112,12 @@ export const createConfiguration: (
           ? 'js/[name]-[contenthash:8].js'
           : 'js/[name].js',
       // In some cases webpack will emit files starts with "_" which is reserved in web extension.
-      chunkFilename:
-        buildFlags.mode === 'production'
-          ? 'js/chunk.[name]-[contenthash:8].js'
-          : 'js/chunk.[name].js',
+      chunkFilename: pathData =>
+        pathData.chunk?.name === 'worker'
+          ? 'js/worker.[contenthash:8].js'
+          : buildFlags.mode === 'production'
+            ? 'js/chunk.[name]-[contenthash:8].js'
+            : 'js/chunk.[name].js',
       assetModuleFilename:
         buildFlags.mode === 'production'
           ? 'assets/[name]-[contenthash:8][ext][query]'
@@ -127,6 +129,7 @@ export const createConfiguration: (
       clean: buildFlags.mode === 'production',
       globalObject: 'globalThis',
       publicPath: getPublicPath(buildFlags),
+      workerPublicPath: '/',
     },
     target: ['web', 'es2022'],