refactor(core): using computed data & optimizing data fetching timing & loading initial values (#12478)

## TL;DR

refactor workspace embedding:

* using computed data
* optimizing data fetching timing(constructor -> component mounted)
* set loading initial values to `true`

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

## Summary by CodeRabbit

- **New Features**
  - Improved loading indicators and state handling for embedding settings, including a more accurate loading state for the embedding toggle.
- **Bug Fixes**
  - The embedding toggle now safely handles unknown or loading states and is disabled while loading, preventing unintended interactions.
- **Refactor**
  - Simplified pagination logic and optimized initial data fetching for a smoother user experience.

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

packages/frontend/core/src/modules/workspace-indexer-embedding/entities/embedding.ts

@@ -24,7 +24,6 @@ import {
 import { COUNT_PER_PAGE } from '../constants';
 import type { EmbeddingStore } from '../stores/embedding';
 import type {
-  AttachmentFile,
   IgnoredDoc,
   LocalAttachmentFile,
   PersistedAttachmentFile,
@@ -55,7 +54,7 @@ interface EmbeddingProgress {
 }
 
 export class Embedding extends Entity {
-  enabled$ = new LiveData<boolean>(false);
+  enabled$ = new LiveData<boolean | null>(null);
   error$ = new LiveData<any>(null);
   attachments$ = new LiveData<Attachments>({
     edges: [],
@@ -66,36 +65,28 @@ export class Embedding extends Entity {
     totalCount: 0,
   });
   ignoredDocs$ = new LiveData<IgnoredDocs>([]);
-  isEnabledLoading$ = new LiveData(false);
-  isAttachmentsLoading$ = new LiveData(false);
-  isIgnoredDocsLoading$ = new LiveData(false);
+  isEnabledLoading$ = new LiveData(true);
+  isAttachmentsLoading$ = new LiveData(true);
+  isIgnoredDocsLoading$ = new LiveData(true);
   embeddingProgress$ = new LiveData<EmbeddingProgress | null>(null);
-  isEmbeddingProgressLoading$ = new LiveData(false);
+  isEmbeddingProgressLoading$ = new LiveData(true);
 
   private readonly EMBEDDING_PROGRESS_POLL_INTERVAL = 3000;
   private readonly stopEmbeddingProgress$ = new Subject<void>();
   uploadingAttachments$ = new LiveData<LocalAttachmentFile[]>([]);
-  mergedAttachments$ = new LiveData<AttachmentFile[]>([]);
 
   constructor(
     private readonly workspaceService: WorkspaceService,
     private readonly store: EmbeddingStore
   ) {
     super();
-    this.getEnabled();
-    this.getAttachments({ first: COUNT_PER_PAGE, after: null });
-    this.getIgnoredDocs();
-    this.getEmbeddingProgress();
-    this.uploadingAttachments$.subscribe(() => this.updateMergedAttachments());
-    this.attachments$.subscribe(() => this.updateMergedAttachments());
-    this.updateMergedAttachments();
   }
 
-  private updateMergedAttachments() {
-    const uploading = this.uploadingAttachments$.value;
-    const uploaded = this.attachments$.value.edges.map(edge => edge.node);
-    this.mergedAttachments$.next([...uploading, ...uploaded].slice(0, 10));
-  }
+  mergedAttachments$ = LiveData.computed(get => {
+    const uploading = get(this.uploadingAttachments$);
+    const uploaded = get(this.attachments$).edges.map(edge => edge.node);
+    return [...uploading, ...uploaded].slice(0, 10);
+  });
 
   getEnabled = effect(
     exhaustMap(() => {

packages/frontend/core/src/modules/workspace-indexer-embedding/view/embedding-settings.tsx

@@ -12,6 +12,7 @@ import { useLiveData, useService } from '@toeverything/infra';
 import type React from 'react';
 import { useCallback, useEffect } from 'react';
 
+import { COUNT_PER_PAGE } from '../constants';
 import { EmbeddingService } from '../services/embedding';
 import { Attachments } from './attachments';
 import EmbeddingProgress from './embedding-progress';
@@ -23,9 +24,7 @@ export const EmbeddingSettings: React.FC<EmbeddingSettingsProps> = () => {
   const t = useI18n();
   const embeddingService = useService(EmbeddingService);
   const embeddingEnabled = useLiveData(embeddingService.embedding.enabled$);
-  const { pageInfo, totalCount } = useLiveData(
-    embeddingService.embedding.attachments$
-  );
+  const { totalCount } = useLiveData(embeddingService.embedding.attachments$);
   const attachments = useLiveData(
     embeddingService.embedding.mergedAttachments$
   );
@@ -38,6 +37,9 @@ export const EmbeddingSettings: React.FC<EmbeddingSettingsProps> = () => {
     embeddingService.embedding.isIgnoredDocsLoading$
   );
   const workspaceDialogService = useService(WorkspaceDialogService);
+  const isEnabledLoading = useLiveData(
+    embeddingService.embedding.isEnabledLoading$
+  );
 
   const handleEmbeddingToggle = useCallback(
     (checked: boolean) => {
@@ -74,10 +76,9 @@ export const EmbeddingSettings: React.FC<EmbeddingSettingsProps> = () => {
     (offset: number) => {
       embeddingService.embedding.getAttachments({
         offset,
-        after: pageInfo.endCursor,
       });
     },
-    [embeddingService.embedding, pageInfo.endCursor]
+    [embeddingService.embedding]
   );
 
   const handleSelectDoc = useCallback(() => {
@@ -113,6 +114,14 @@ export const EmbeddingSettings: React.FC<EmbeddingSettingsProps> = () => {
 
   useEffect(() => {
     embeddingService.embedding.startEmbeddingProgressPolling();
+    embeddingService.embedding.getEnabled();
+    embeddingService.embedding.getAttachments({
+      first: COUNT_PER_PAGE,
+      after: null,
+    });
+    embeddingService.embedding.getIgnoredDocs();
+    embeddingService.embedding.getEmbeddingProgress();
+
     return () => {
       embeddingService.embedding.stopEmbeddingProgressPolling();
     };
@@ -139,8 +148,9 @@ export const EmbeddingSettings: React.FC<EmbeddingSettingsProps> = () => {
         >
           <Switch
             data-testid="workspace-embedding-setting-switch"
-            checked={embeddingEnabled}
+            checked={embeddingEnabled ?? false}
             onChange={handleEmbeddingToggle}
+            disabled={isEnabledLoading}
           />
         </SettingRow>