feat(ios): add intelligents button (#9281)

Co-authored-by: 砍砍 <git@qaq.wiki>

packages/frontend/core/src/modules/ai-button/index.ts

@@ -0,0 +1,13 @@
+export { AIButtonProvider } from './provider/ai-button';
+export { AIButtonService } from './services/ai-button';
+
+import type { Framework } from '@toeverything/infra';
+
+import { AIButtonProvider } from './provider/ai-button';
+import { AIButtonService } from './services/ai-button';
+
+export const configureAIButtonModule = (framework: Framework) => {
+  framework.service(AIButtonService, container => {
+    return new AIButtonService(container.getOptional(AIButtonProvider));
+  });
+};

packages/frontend/core/src/modules/ai-button/provider/ai-button.ts

@@ -0,0 +1,9 @@
+import { createIdentifier } from '@toeverything/infra';
+
+export interface AIButtonProvider {
+  presentAIButton: () => Promise<void>;
+  dismissAIButton: () => Promise<void>;
+}
+
+export const AIButtonProvider =
+  createIdentifier<AIButtonProvider>('AIButtonProvider');

packages/frontend/core/src/modules/ai-button/services/ai-button.ts

@@ -0,0 +1,48 @@
+import { DebugLogger } from '@affine/debug';
+import {
+  effect,
+  exhaustMapWithTrailing,
+  fromPromise,
+  Service,
+} from '@toeverything/infra';
+import {
+  catchError,
+  distinctUntilChanged,
+  EMPTY,
+  mergeMap,
+  throttleTime,
+} from 'rxjs';
+
+import type { AIButtonProvider } from '../provider/ai-button';
+
+const logger = new DebugLogger('AIButtonService');
+
+export class AIButtonService extends Service {
+  constructor(private readonly aiButtonProvider?: AIButtonProvider) {
+    super();
+  }
+
+  presentAIButton = effect(
+    distinctUntilChanged(),
+    throttleTime<boolean>(1000), // throttle time to avoid frequent calls
+    exhaustMapWithTrailing((present: boolean) => {
+      return fromPromise(async () => {
+        if (!this.aiButtonProvider) {
+          return;
+        }
+        if (present) {
+          await this.aiButtonProvider.presentAIButton();
+        } else {
+          await this.aiButtonProvider.dismissAIButton();
+        }
+        return;
+      }).pipe(
+        mergeMap(() => EMPTY),
+        catchError(err => {
+          logger.error('presentAIButton error', err);
+          return EMPTY;
+        })
+      );
+    })
+  );
+}