enhance(backend): improve fanout tl

Resolve #11958
Resolve #12061

packages/backend/src/core/UserFollowingService.ts

@@ -29,6 +29,7 @@ import { CacheService } from '@/core/CacheService.js';
 import type { Config } from '@/config.js';
 import { AccountMoveService } from '@/core/AccountMoveService.js';
 import { UtilityService } from '@/core/UtilityService.js';
+import { FunoutTimelineService } from '@/core/FunoutTimelineService.js';
 import Logger from '../logger.js';
 
 const logger = new Logger('following/create');
@@ -83,6 +84,7 @@ export class UserFollowingService implements OnModuleInit {
 		private webhookService: WebhookService,
 		private apRendererService: ApRendererService,
 		private accountMoveService: AccountMoveService,
+		private funoutTimelineService: FunoutTimelineService,
 		private perUserFollowingChart: PerUserFollowingChart,
 		private instanceChart: InstanceChart,
 	) {
@@ -288,8 +290,8 @@ export class UserFollowingService implements OnModuleInit {
 			this.perUserFollowingChart.update(follower, followee, true);
 		}
 
-		// Publish follow event
 		if (this.userEntityService.isLocalUser(follower) && !silent) {
+			// Publish follow event
 			this.userEntityService.pack(followee.id, follower, {
 				detail: true,
 			}).then(async packed => {
@@ -302,6 +304,8 @@ export class UserFollowingService implements OnModuleInit {
 					});
 				}
 			});
+
+			this.funoutTimelineService.purge(`homeTimeline:${follower.id}`);
 		}
 
 		// Publish followed event
@@ -355,8 +359,8 @@ export class UserFollowingService implements OnModuleInit {
 
 		this.decrementFollowing(following.follower, following.followee);
 
-		// Publish unfollow event
 		if (!silent && this.userEntityService.isLocalUser(follower)) {
+			// Publish unfollow event
 			this.userEntityService.pack(followee.id, follower, {
 				detail: true,
 			}).then(async packed => {
@@ -369,6 +373,8 @@ export class UserFollowingService implements OnModuleInit {
 					});
 				}
 			});
+
+			this.funoutTimelineService.purge(`homeTimeline:${follower.id}`);
 		}
 
 		if (this.userEntityService.isLocalUser(follower) && this.userEntityService.isRemoteUser(followee)) {
@@ -707,4 +713,12 @@ export class UserFollowingService implements OnModuleInit {
 			});
 		}
 	}
+
+	@bindThis
+	public getFollowees(userId: MiUser['id']) {
+		return this.followingsRepository.createQueryBuilder('following')
+			.select('following.followeeId')
+			.where('following.followerId = :followerId', { followerId: userId })
+			.getMany();
+	}
 }