Refine fanout timeline (#12507)

* chore(endpoints/hybrid-timeline): don't pack inside getFromDb

* chore(endpoints/hybrid-timeline): Redisから取得する部分のうちSTLに依存しなそうなところを別のServiceに切り出し

* chore(endpoints/local-timeline): FanoutTimelineEndpointServiceで再実装

* chore(endpoints/channels/timeline): FanoutTimelineEndpointServiceで再実装

* chore(endpoints/timeline): FanoutTimelineEndpointServiceで再実装

* chore(endpoints/user-list-timeline): FanoutTimelineEndpointServiceで再実装

* chore(endpoints/users/notes): FanoutTimelineEndpointServiceで再実装

* chore: add useDbFallback to FanoutTimelineEndpointService.timeline and always true for channel / user note list

* style: fix lint error

* chore: split logic to multiple functions

* chore: implement redis fallback

* chore: 成功率を上げる

* fix: db fallback not working

* feat: allowPartial

* chore(frontend): set allowPartial

* chore(backend): remove fallbackIfEmpty

HTL will never be purged so it's no longer required

* fix: missing allowPartial in channel timeline

* fix: type of timelineConfig in hybrid-timeline

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/backend/src/core/CoreModule.ts

@@ -4,6 +4,7 @@
  */
 
 import { Module } from '@nestjs/common';
+import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { AccountMoveService } from './AccountMoveService.js';
 import { AccountUpdateService } from './AccountUpdateService.js';
 import { AiService } from './AiService.js';
@@ -195,6 +196,7 @@ const $SearchService: Provider = { provide: 'SearchService', useExisting: Search
 const $ClipService: Provider = { provide: 'ClipService', useExisting: ClipService };
 const $FeaturedService: Provider = { provide: 'FeaturedService', useExisting: FeaturedService };
 const $FanoutTimelineService: Provider = { provide: 'FanoutTimelineService', useExisting: FanoutTimelineService };
+const $FanoutTimelineEndpointService: Provider = { provide: 'FanoutTimelineEndpointService', useExisting: FanoutTimelineEndpointService };
 const $ChannelFollowingService: Provider = { provide: 'ChannelFollowingService', useExisting: ChannelFollowingService };
 const $RegistryApiService: Provider = { provide: 'RegistryApiService', useExisting: RegistryApiService };
 
@@ -331,6 +333,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		ClipService,
 		FeaturedService,
 		FanoutTimelineService,
+		FanoutTimelineEndpointService,
 		ChannelFollowingService,
 		RegistryApiService,
 		ChartLoggerService,
@@ -460,6 +463,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$ClipService,
 		$FeaturedService,
 		$FanoutTimelineService,
+		$FanoutTimelineEndpointService,
 		$ChannelFollowingService,
 		$RegistryApiService,
 		$ChartLoggerService,
@@ -590,6 +594,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		ClipService,
 		FeaturedService,
 		FanoutTimelineService,
+		FanoutTimelineEndpointService,
 		ChannelFollowingService,
 		RegistryApiService,
 		FederationChart,
@@ -718,6 +723,7 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$ClipService,
 		$FeaturedService,
 		$FanoutTimelineService,
+		$FanoutTimelineEndpointService,
 		$ChannelFollowingService,
 		$RegistryApiService,
 		$FederationChart,

packages/backend/src/core/FanoutTimelineEndpointService.ts

@@ -0,0 +1,123 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and other misskey contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Inject, Injectable } from '@nestjs/common';
+import { DI } from '@/di-symbols.js';
+import { bindThis } from '@/decorators.js';
+import type { MiUser } from '@/models/User.js';
+import type { MiNote } from '@/models/Note.js';
+import { Packed } from '@/misc/json-schema.js';
+import type { NotesRepository } from '@/models/_.js';
+import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
+import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
+
+@Injectable()
+export class FanoutTimelineEndpointService {
+	constructor(
+		@Inject(DI.notesRepository)
+		private notesRepository: NotesRepository,
+
+		private noteEntityService: NoteEntityService,
+		private fanoutTimelineService: FanoutTimelineService,
+	) {
+	}
+
+	@bindThis
+	async timeline(ps: {
+		untilId: string | null,
+		sinceId: string | null,
+		limit: number,
+		allowPartial: boolean,
+		me?: { id: MiUser['id'] } | undefined | null,
+		useDbFallback: boolean,
+		redisTimelines: string[],
+		noteFilter: (note: MiNote) => boolean,
+		dbFallback: (untilId: string | null, sinceId: string | null, limit: number) => Promise<MiNote[]>,
+	}): Promise<Packed<'Note'>[]> {
+		return await this.noteEntityService.packMany(await this.getMiNotes(ps), ps.me);
+	}
+
+	@bindThis
+	private async getMiNotes(ps: {
+		untilId: string | null,
+		sinceId: string | null,
+		limit: number,
+		allowPartial: boolean,
+		me?: { id: MiUser['id'] } | undefined | null,
+		useDbFallback: boolean,
+		redisTimelines: string[],
+		noteFilter: (note: MiNote) => boolean,
+		dbFallback: (untilId: string | null, sinceId: string | null, limit: number) => Promise<MiNote[]>,
+	}): Promise<MiNote[]> {
+		let noteIds: string[];
+		let shouldFallbackToDb = false;
+
+		// 呼び出し元と以下の処理をシンプルにするためにdbFallbackを置き換える
+		if (!ps.useDbFallback) ps.dbFallback = () => Promise.resolve([]);
+
+		const redisResult = await this.fanoutTimelineService.getMulti(ps.redisTimelines, ps.untilId, ps.sinceId);
+
+		const redisResultIds = Array.from(new Set(redisResult.flat(1)));
+
+		redisResultIds.sort((a, b) => a > b ? -1 : 1);
+		noteIds = redisResultIds.slice(0, ps.limit);
+
+		shouldFallbackToDb = shouldFallbackToDb || (noteIds.length === 0);
+
+		if (!shouldFallbackToDb) {
+			const redisTimeline: MiNote[] = [];
+			let readFromRedis = 0;
+			let lastSuccessfulRate = 1; // rateをキャッシュする？
+			let trialCount = 1;
+
+			while ((redisResultIds.length - readFromRedis) !== 0) {
+				const remainingToRead = ps.limit - redisTimeline.length;
+
+				// DBからの取り直しを減らす初回と同じ割合以上で成功すると仮定するが、クエリの長さを考えて三倍まで
+				const countToGet = remainingToRead * Math.ceil(Math.min(1.1 / lastSuccessfulRate, 3));
+				noteIds = redisResultIds.slice(readFromRedis, readFromRedis + countToGet);
+
+				readFromRedis += noteIds.length;
+
+				const gotFromDb = await this.getAndFilterFromDb(noteIds, ps.noteFilter);
+				redisTimeline.push(...gotFromDb);
+				lastSuccessfulRate = gotFromDb.length / noteIds.length;
+
+				console.log(`fanoutTimelineTrial#${trialCount++}: req: ${ps.limit}, tried: ${noteIds.length}, got: ${gotFromDb.length}, rate: ${lastSuccessfulRate}, total: ${redisTimeline.length}, fromRedis: ${redisResultIds.length}`);
+
+				if (ps.allowPartial ? redisTimeline.length !== 0 : redisTimeline.length >= ps.limit) {
+					// 十分Redisからとれた
+					return redisTimeline.slice(0, ps.limit);
+				}
+			}
+
+			// まだ足りない分はDBにフォールバック
+			const remainingToRead = ps.limit - redisTimeline.length;
+			const gotFromDb = await ps.dbFallback(noteIds[noteIds.length - 1], ps.sinceId, remainingToRead);
+			redisTimeline.push(...gotFromDb);
+			console.log(`fanoutTimelineTrial#db: req: ${ps.limit}, tried: ${remainingToRead}, got: ${gotFromDb.length}, since: ${noteIds[noteIds.length - 1]}, until: ${ps.untilId}, total: ${redisTimeline.length}`);
+			return redisTimeline;
+		}
+
+		return await ps.dbFallback(ps.untilId, ps.sinceId, ps.limit);
+	}
+
+	private async getAndFilterFromDb(noteIds: string[], noteFilter: (note: MiNote) => boolean): Promise<MiNote[]> {
+		const query = this.notesRepository.createQueryBuilder('note')
+			.where('note.id IN (:...noteIds)', { noteIds: noteIds })
+			.innerJoinAndSelect('note.user', 'user')
+			.leftJoinAndSelect('note.reply', 'reply')
+			.leftJoinAndSelect('note.renote', 'renote')
+			.leftJoinAndSelect('reply.user', 'replyUser')
+			.leftJoinAndSelect('renote.user', 'renoteUser')
+			.leftJoinAndSelect('note.channel', 'channel');
+
+		const notes = (await query.getMany()).filter(noteFilter);
+
+		notes.sort((a, b) => a.id > b.id ? -1 : 1);
+
+		return notes;
+	}
+}

packages/backend/src/server/api/endpoints/channels/timeline.ts

@@ -12,10 +12,11 @@ import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
 import { DI } from '@/di-symbols.js';
 import { IdService } from '@/core/IdService.js';
-import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
 import { isUserRelated } from '@/misc/is-user-related.js';
 import { CacheService } from '@/core/CacheService.js';
 import { MetaService } from '@/core/MetaService.js';
+import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
+import { MiLocalUser } from '@/models/User.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -51,6 +52,7 @@ export const paramDef = {
 		untilId: { type: 'string', format: 'misskey:id' },
 		sinceDate: { type: 'integer' },
 		untilDate: { type: 'integer' },
+		allowPartial: { type: 'boolean', default: false }, // true is recommended but for compatibility false by default
 	},
 	required: ['channelId'],
 } as const;
@@ -58,9 +60,6 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
-		@Inject(DI.redisForTimelines)
-		private redisForTimelines: Redis.Redis,
-
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -70,7 +69,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private idService: IdService,
 		private noteEntityService: NoteEntityService,
 		private queryService: QueryService,
-		private fanoutTimelineService: FanoutTimelineService,
+		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 		private cacheService: CacheService,
 		private activeUsersChart: ActiveUsersChart,
 		private metaService: MetaService,
@@ -78,7 +77,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
 			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.gen(ps.sinceDate!) : null);
-			const isRangeSpecified = untilId != null && sinceId != null;
 
 			const serverSettings = await this.metaService.fetch();
 
@@ -92,64 +90,58 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 
 			if (me) this.activeUsersChart.read(me);
 
-			if (serverSettings.enableFanoutTimeline && (isRangeSpecified || sinceId == null)) {
+			if (!serverSettings.enableFanoutTimeline) {
-				const [
+				return await this.noteEntityService.packMany(await this.getFromDb({ untilId, sinceId, limit: ps.limit, channelId: channel.id }, me), me);
-					userIdsWhoMeMuting,
-				] = me ? await Promise.all([
-					this.cacheService.userMutingsCache.fetch(me.id),
-				]) : [new Set<string>()];
-
-				let noteIds = await this.fanoutTimelineService.get(`channelTimeline:${channel.id}`, untilId, sinceId);
-				noteIds = noteIds.slice(0, ps.limit);
-
-				if (noteIds.length > 0) {
-					const query = this.notesRepository.createQueryBuilder('note')
-						.where('note.id IN (:...noteIds)', { noteIds: noteIds })
-						.innerJoinAndSelect('note.user', 'user')
-						.leftJoinAndSelect('note.reply', 'reply')
-						.leftJoinAndSelect('note.renote', 'renote')
-						.leftJoinAndSelect('reply.user', 'replyUser')
-						.leftJoinAndSelect('renote.user', 'renoteUser')
-						.leftJoinAndSelect('note.channel', 'channel');
-
-					let timeline = await query.getMany();
-
-					timeline = timeline.filter(note => {
-						if (me && isUserRelated(note, userIdsWhoMeMuting)) return false;
-
-						return true;
-					});
-
-					// TODO: フィルタで件数が減った場合の埋め合わせ処理
-
-					timeline.sort((a, b) => a.id > b.id ? -1 : 1);
-
-					if (timeline.length > 0) {
-						return await this.noteEntityService.packMany(timeline, me);
-					}
-				}
 			}
 
-			//#region fallback to database
+			const [
-			const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'), ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+				userIdsWhoMeMuting,
-				.andWhere('note.channelId = :channelId', { channelId: channel.id })
+			] = me ? await Promise.all([
-				.innerJoinAndSelect('note.user', 'user')
+				this.cacheService.userMutingsCache.fetch(me.id),
-				.leftJoinAndSelect('note.reply', 'reply')
+			]) : [new Set<string>()];
-				.leftJoinAndSelect('note.renote', 'renote')
-				.leftJoinAndSelect('reply.user', 'replyUser')
-				.leftJoinAndSelect('renote.user', 'renoteUser')
-				.leftJoinAndSelect('note.channel', 'channel');
 
-			if (me) {
+			return await this.fanoutTimelineEndpointService.timeline({
-				this.queryService.generateMutedUserQuery(query, me);
+				untilId,
-				this.queryService.generateBlockedUserQuery(query, me);
+				sinceId,
-			}
+				limit: ps.limit,
-			//#endregion
+				allowPartial: ps.allowPartial,
+				me,
+				useDbFallback: true,
+				redisTimelines: [`channelTimeline:${channel.id}`],
+				noteFilter: note => {
+					if (me && isUserRelated(note, userIdsWhoMeMuting)) return false;
 
-			const timeline = await query.limit(ps.limit).getMany();
+					return true;
-
+				},
-			return await this.noteEntityService.packMany(timeline, me);
+				dbFallback: async (untilId, sinceId, limit) => {
-			//#endregion
+					return await this.getFromDb({ untilId, sinceId, limit, channelId: channel.id }, me);
+				},
+			});
 		});
 	}
+
+	private async getFromDb(ps: {
+		untilId: string | null,
+		sinceId: string | null,
+		limit: number,
+		channelId: string
+	}, me: MiLocalUser | null) {
+		//#region fallback to database
+		const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'), ps.sinceId, ps.untilId)
+			.andWhere('note.channelId = :channelId', { channelId: ps.channelId })
+			.innerJoinAndSelect('note.user', 'user')
+			.leftJoinAndSelect('note.reply', 'reply')
+			.leftJoinAndSelect('note.renote', 'renote')
+			.leftJoinAndSelect('reply.user', 'replyUser')
+			.leftJoinAndSelect('renote.user', 'renoteUser')
+			.leftJoinAndSelect('note.channel', 'channel');
+
+		if (me) {
+			this.queryService.generateMutedUserQuery(query, me);
+			this.queryService.generateBlockedUserQuery(query, me);
+		}
+		//#endregion
+
+		return await query.limit(ps.limit).getMany();
+	}
 }

packages/backend/src/server/api/endpoints/notes/hybrid-timeline.ts

@@ -5,7 +5,7 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { NotesRepository, FollowingsRepository, MiNote, ChannelFollowingsRepository } from '@/models/_.js';
+import type { NotesRepository, ChannelFollowingsRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
@@ -19,6 +19,7 @@ import { QueryService } from '@/core/QueryService.js';
 import { UserFollowingService } from '@/core/UserFollowingService.js';
 import { MetaService } from '@/core/MetaService.js';
 import { MiLocalUser } from '@/models/User.js';
+import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -53,6 +54,7 @@ export const paramDef = {
 		untilId: { type: 'string', format: 'misskey:id' },
 		sinceDate: { type: 'integer' },
 		untilDate: { type: 'integer' },
+		allowPartial: { type: 'boolean', default: false }, // true is recommended but for compatibility false by default
 		includeMyRenotes: { type: 'boolean', default: true },
 		includeRenotedMyNotes: { type: 'boolean', default: true },
 		includeLocalRenotes: { type: 'boolean', default: true },
@@ -77,10 +79,10 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private activeUsersChart: ActiveUsersChart,
 		private idService: IdService,
 		private cacheService: CacheService,
-		private fanoutTimelineService: FanoutTimelineService,
 		private queryService: QueryService,
 		private userFollowingService: UserFollowingService,
 		private metaService: MetaService,
+		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
@@ -94,7 +96,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			const serverSettings = await this.metaService.fetch();
 
 			if (!serverSettings.enableFanoutTimeline) {
-				return await this.getFromDb({
+				const timeline = await this.getFromDb({
 					untilId,
 					sinceId,
 					limit: ps.limit,
@@ -104,6 +106,12 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					withFiles: ps.withFiles,
 					withReplies: ps.withReplies,
 				}, me);
+
+				process.nextTick(() => {
+					this.activeUsersChart.read(me);
+				});
+
+				return await this.noteEntityService.packMany(timeline, me);
 			}
 
 			const [
@@ -116,51 +124,34 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				this.cacheService.userBlockedCache.fetch(me.id),
 			]);
 
-			let noteIds: string[];
+			let timelineConfig: string[];
-			let shouldFallbackToDb = false;
 
 			if (ps.withFiles) {
-				const [htlNoteIds, ltlNoteIds] = await this.fanoutTimelineService.getMulti([
+				timelineConfig = [
 					`homeTimelineWithFiles:${me.id}`,
 					'localTimelineWithFiles',
-				], untilId, sinceId);
+				];
-				noteIds = Array.from(new Set([...htlNoteIds, ...ltlNoteIds]));
 			} else if (ps.withReplies) {
-				const [htlNoteIds, ltlNoteIds, ltlReplyNoteIds] = await this.fanoutTimelineService.getMulti([
+				timelineConfig = [
 					`homeTimeline:${me.id}`,
 					'localTimeline',
 					'localTimelineWithReplies',
-				], untilId, sinceId);
+				];
-				noteIds = Array.from(new Set([...htlNoteIds, ...ltlNoteIds, ...ltlReplyNoteIds]));
 			} else {
-				const [htlNoteIds, ltlNoteIds] = await this.fanoutTimelineService.getMulti([
+				timelineConfig = [
 					`homeTimeline:${me.id}`,
 					'localTimeline',
-				], untilId, sinceId);
+				];
-				noteIds = Array.from(new Set([...htlNoteIds, ...ltlNoteIds]));
-				shouldFallbackToDb = htlNoteIds.length === 0;
 			}
 
-			noteIds.sort((a, b) => a > b ? -1 : 1);
+			const redisTimeline = await this.fanoutTimelineEndpointService.timeline({
-			noteIds = noteIds.slice(0, ps.limit);
+				untilId,
-
+				sinceId,
-			shouldFallbackToDb = shouldFallbackToDb || (noteIds.length === 0);
+				limit: ps.limit,
-
+				allowPartial: ps.allowPartial,
-			let redisTimeline: MiNote[] = [];
+				redisTimelines: timelineConfig,
-
+				useDbFallback: serverSettings.enableFanoutTimelineDbFallback,
-			if (!shouldFallbackToDb) {
+				noteFilter: (note) => {
-				const query = this.notesRepository.createQueryBuilder('note')
-					.where('note.id IN (:...noteIds)', { noteIds: noteIds })
-					.innerJoinAndSelect('note.user', 'user')
-					.leftJoinAndSelect('note.reply', 'reply')
-					.leftJoinAndSelect('note.renote', 'renote')
-					.leftJoinAndSelect('reply.user', 'replyUser')
-					.leftJoinAndSelect('renote.user', 'renoteUser')
-					.leftJoinAndSelect('note.channel', 'channel');
-
-				redisTimeline = await query.getMany();
-
-				redisTimeline = redisTimeline.filter(note => {
 					if (note.userId === me.id) {
 						return true;
 					}
@@ -174,33 +165,24 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					}
 
 					return true;
-				});
+				},
+				dbFallback: async (untilId, sinceId, limit) => await this.getFromDb({
+					untilId,
+					sinceId,
+					limit,
+					includeMyRenotes: ps.includeMyRenotes,
+					includeRenotedMyNotes: ps.includeRenotedMyNotes,
+					includeLocalRenotes: ps.includeLocalRenotes,
+					withFiles: ps.withFiles,
+					withReplies: ps.withReplies,
+				}, me),
+			});
 
-				redisTimeline.sort((a, b) => a.id > b.id ? -1 : 1);
+			process.nextTick(() => {
-			}
+				this.activeUsersChart.read(me);
+			});
 
-			if (redisTimeline.length > 0) {
+			return redisTimeline;
-				process.nextTick(() => {
-					this.activeUsersChart.read(me);
-				});
-
-				return await this.noteEntityService.packMany(redisTimeline, me);
-			} else {
-				if (serverSettings.enableFanoutTimelineDbFallback) { // fallback to db
-					return await this.getFromDb({
-						untilId,
-						sinceId,
-						limit: ps.limit,
-						includeMyRenotes: ps.includeMyRenotes,
-						includeRenotedMyNotes: ps.includeRenotedMyNotes,
-						includeLocalRenotes: ps.includeLocalRenotes,
-						withFiles: ps.withFiles,
-						withReplies: ps.withReplies,
-					}, me);
-				} else {
-					return [];
-				}
-			}
 		});
 	}
 
@@ -301,12 +283,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		}
 		//#endregion
 
-		const timeline = await query.limit(ps.limit).getMany();
+		return await query.limit(ps.limit).getMany();
-
-		process.nextTick(() => {
-			this.activeUsersChart.read(me);
-		});
-
-		return await this.noteEntityService.packMany(timeline, me);
 	}
 }

packages/backend/src/server/api/endpoints/notes/local-timeline.ts

@@ -14,10 +14,10 @@ import { RoleService } from '@/core/RoleService.js';
 import { IdService } from '@/core/IdService.js';
 import { CacheService } from '@/core/CacheService.js';
 import { isUserRelated } from '@/misc/is-user-related.js';
-import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
 import { QueryService } from '@/core/QueryService.js';
 import { MetaService } from '@/core/MetaService.js';
 import { MiLocalUser } from '@/models/User.js';
+import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -51,6 +51,7 @@ export const paramDef = {
 		limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
 		sinceId: { type: 'string', format: 'misskey:id' },
 		untilId: { type: 'string', format: 'misskey:id' },
+		allowPartial: { type: 'boolean', default: false }, // true is recommended but for compatibility false by default
 		sinceDate: { type: 'integer' },
 		untilDate: { type: 'integer' },
 	},
@@ -68,7 +69,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private activeUsersChart: ActiveUsersChart,
 		private idService: IdService,
 		private cacheService: CacheService,
-		private fanoutTimelineService: FanoutTimelineService,
+		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 		private queryService: QueryService,
 		private metaService: MetaService,
 	) {
@@ -84,13 +85,21 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			const serverSettings = await this.metaService.fetch();
 
 			if (!serverSettings.enableFanoutTimeline) {
-				return await this.getFromDb({
+				const timeline = await this.getFromDb({
 					untilId,
 					sinceId,
 					limit: ps.limit,
 					withFiles: ps.withFiles,
 					withReplies: ps.withReplies,
 				}, me);
+
+				process.nextTick(() => {
+					if (me) {
+						this.activeUsersChart.read(me);
+					}
+				});
+
+				return await this.noteEntityService.packMany(timeline, me);
 			}
 
 			const [
@@ -103,36 +112,15 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				this.cacheService.userBlockedCache.fetch(me.id),
 			]) : [new Set<string>(), new Set<string>(), new Set<string>()];
 
-			let noteIds: string[];
+			const timeline = await this.fanoutTimelineEndpointService.timeline({
-
+				untilId,
-			if (ps.withFiles) {
+				sinceId,
-				noteIds = await this.fanoutTimelineService.get('localTimelineWithFiles', untilId, sinceId);
+				limit: ps.limit,
-			} else {
+				allowPartial: ps.allowPartial,
-				const [nonReplyNoteIds, replyNoteIds] = await this.fanoutTimelineService.getMulti([
+				me,
-					'localTimeline',
+				useDbFallback: serverSettings.enableFanoutTimelineDbFallback,
-					'localTimelineWithReplies',
+				redisTimelines: ps.withFiles ? ['localTimelineWithFiles'] : ['localTimeline', 'localTimelineWithReplies'],
-				], untilId, sinceId);
+				noteFilter: note => {
-				noteIds = Array.from(new Set([...nonReplyNoteIds, ...replyNoteIds]));
-				noteIds.sort((a, b) => a > b ? -1 : 1);
-			}
-
-			noteIds = noteIds.slice(0, ps.limit);
-
-			let redisTimeline: MiNote[] = [];
-
-			if (noteIds.length > 0) {
-				const query = this.notesRepository.createQueryBuilder('note')
-					.where('note.id IN (:...noteIds)', { noteIds: noteIds })
-					.innerJoinAndSelect('note.user', 'user')
-					.leftJoinAndSelect('note.reply', 'reply')
-					.leftJoinAndSelect('note.renote', 'renote')
-					.leftJoinAndSelect('reply.user', 'replyUser')
-					.leftJoinAndSelect('renote.user', 'renoteUser')
-					.leftJoinAndSelect('note.channel', 'channel');
-
-				redisTimeline = await query.getMany();
-
-				redisTimeline = redisTimeline.filter(note => {
 					if (me && (note.userId === me.id)) {
 						return true;
 					}
@@ -147,32 +135,23 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					}
 
 					return true;
-				});
+				},
+				dbFallback: async (untilId, sinceId, limit) => await this.getFromDb({
+					untilId,
+					sinceId,
+					limit,
+					withFiles: ps.withFiles,
+					withReplies: ps.withReplies,
+				}, me),
+			});
 
-				redisTimeline.sort((a, b) => a.id > b.id ? -1 : 1);
+			process.nextTick(() => {
-			}
+				if (me) {
-
+					this.activeUsersChart.read(me);
-			if (redisTimeline.length > 0) {
-				process.nextTick(() => {
-					if (me) {
-						this.activeUsersChart.read(me);
-					}
-				});
-
-				return await this.noteEntityService.packMany(redisTimeline, me);
-			} else {
-				if (serverSettings.enableFanoutTimelineDbFallback) { // fallback to db
-					return await this.getFromDb({
-						untilId,
-						sinceId,
-						limit: ps.limit,
-						withFiles: ps.withFiles,
-						withReplies: ps.withReplies,
-					}, me);
-				} else {
-					return [];
 				}
-			}
+			});
+
+			return timeline;
 		});
 	}
 
@@ -213,14 +192,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			}));
 		}
 
-		const timeline = await query.limit(ps.limit).getMany();
+		return await query.limit(ps.limit).getMany();
-
-		process.nextTick(() => {
-			if (me) {
-				this.activeUsersChart.read(me);
-			}
-		});
-
-		return await this.noteEntityService.packMany(timeline, me);
 	}
 }

packages/backend/src/server/api/endpoints/notes/timeline.ts

@@ -5,7 +5,7 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import type { MiNote, NotesRepository, ChannelFollowingsRepository } from '@/models/_.js';
+import type { NotesRepository, ChannelFollowingsRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { QueryService } from '@/core/QueryService.js';
 import ActiveUsersChart from '@/core/chart/charts/active-users.js';
@@ -14,10 +14,10 @@ import { DI } from '@/di-symbols.js';
 import { IdService } from '@/core/IdService.js';
 import { CacheService } from '@/core/CacheService.js';
 import { isUserRelated } from '@/misc/is-user-related.js';
-import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
 import { UserFollowingService } from '@/core/UserFollowingService.js';
 import { MiLocalUser } from '@/models/User.js';
 import { MetaService } from '@/core/MetaService.js';
+import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 
 export const meta = {
 	tags: ['notes'],
@@ -43,6 +43,7 @@ export const paramDef = {
 		untilId: { type: 'string', format: 'misskey:id' },
 		sinceDate: { type: 'integer' },
 		untilDate: { type: 'integer' },
+		allowPartial: { type: 'boolean', default: false }, // true is recommended but for compatibility false by default
 		includeMyRenotes: { type: 'boolean', default: true },
 		includeRenotedMyNotes: { type: 'boolean', default: true },
 		includeLocalRenotes: { type: 'boolean', default: true },
@@ -65,7 +66,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private activeUsersChart: ActiveUsersChart,
 		private idService: IdService,
 		private cacheService: CacheService,
-		private fanoutTimelineService: FanoutTimelineService,
+		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 		private userFollowingService: UserFollowingService,
 		private queryService: QueryService,
 		private metaService: MetaService,
@@ -77,7 +78,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			const serverSettings = await this.metaService.fetch();
 
 			if (!serverSettings.enableFanoutTimeline) {
-				return await this.getFromDb({
+				const timeline = await this.getFromDb({
 					untilId,
 					sinceId,
 					limit: ps.limit,
@@ -87,6 +88,12 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					withFiles: ps.withFiles,
 					withRenotes: ps.withRenotes,
 				}, me);
+
+				process.nextTick(() => {
+					this.activeUsersChart.read(me);
+				});
+
+				return await this.noteEntityService.packMany(timeline, me);
 			}
 
 			const [
@@ -101,24 +108,15 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				this.cacheService.userBlockedCache.fetch(me.id),
 			]);
 
-			let noteIds = await this.fanoutTimelineService.get(ps.withFiles ? `homeTimelineWithFiles:${me.id}` : `homeTimeline:${me.id}`, untilId, sinceId);
+			const timeline = this.fanoutTimelineEndpointService.timeline({
-			noteIds = noteIds.slice(0, ps.limit);
+				untilId,
-
+				sinceId,
-			let redisTimeline: MiNote[] = [];
+				limit: ps.limit,
-
+				allowPartial: ps.allowPartial,
-			if (noteIds.length > 0) {
+				me,
-				const query = this.notesRepository.createQueryBuilder('note')
+				useDbFallback: serverSettings.enableFanoutTimelineDbFallback,
-					.where('note.id IN (:...noteIds)', { noteIds: noteIds })
+				redisTimelines: ps.withFiles ? [`homeTimelineWithFiles:${me.id}`] : [`homeTimeline:${me.id}`],
-					.innerJoinAndSelect('note.user', 'user')
+				noteFilter: note => {
-					.leftJoinAndSelect('note.reply', 'reply')
-					.leftJoinAndSelect('note.renote', 'renote')
-					.leftJoinAndSelect('reply.user', 'replyUser')
-					.leftJoinAndSelect('renote.user', 'renoteUser')
-					.leftJoinAndSelect('note.channel', 'channel');
-
-				redisTimeline = await query.getMany();
-
-				redisTimeline = redisTimeline.filter(note => {
 					if (note.userId === me.id) {
 						return true;
 					}
@@ -135,33 +133,24 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					}
 
 					return true;
-				});
+				},
+				dbFallback: async (untilId, sinceId, limit) => await this.getFromDb({
+					untilId,
+					sinceId,
+					limit,
+					includeMyRenotes: ps.includeMyRenotes,
+					includeRenotedMyNotes: ps.includeRenotedMyNotes,
+					includeLocalRenotes: ps.includeLocalRenotes,
+					withFiles: ps.withFiles,
+					withRenotes: ps.withRenotes,
+				}, me),
+			});
 
-				redisTimeline.sort((a, b) => a.id > b.id ? -1 : 1);
+			process.nextTick(() => {
-			}
+				this.activeUsersChart.read(me);
+			});
 
-			if (redisTimeline.length > 0) {
+			return timeline;
-				process.nextTick(() => {
-					this.activeUsersChart.read(me);
-				});
-
-				return await this.noteEntityService.packMany(redisTimeline, me);
-			} else {
-				if (serverSettings.enableFanoutTimelineDbFallback) { // fallback to db
-					return await this.getFromDb({
-						untilId,
-						sinceId,
-						limit: ps.limit,
-						includeMyRenotes: ps.includeMyRenotes,
-						includeRenotedMyNotes: ps.includeRenotedMyNotes,
-						includeLocalRenotes: ps.includeLocalRenotes,
-						withFiles: ps.withFiles,
-						withRenotes: ps.withRenotes,
-					}, me);
-				} else {
-					return [];
-				}
-			}
 		});
 	}
 
@@ -269,12 +258,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		}
 		//#endregion
 
-		const timeline = await query.limit(ps.limit).getMany();
+		return await query.limit(ps.limit).getMany();
-
-		process.nextTick(() => {
-			this.activeUsersChart.read(me);
-		});
-
-		return await this.noteEntityService.packMany(timeline, me);
 	}
 }

packages/backend/src/server/api/endpoints/notes/user-list-timeline.ts

@@ -17,6 +17,7 @@ import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
 import { QueryService } from '@/core/QueryService.js';
 import { MiLocalUser } from '@/models/User.js';
 import { MetaService } from '@/core/MetaService.js';
+import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -52,6 +53,7 @@ export const paramDef = {
 		untilId: { type: 'string', format: 'misskey:id' },
 		sinceDate: { type: 'integer' },
 		untilDate: { type: 'integer' },
+		allowPartial: { type: 'boolean', default: false }, // true is recommended but for compatibility false by default
 		includeMyRenotes: { type: 'boolean', default: true },
 		includeRenotedMyNotes: { type: 'boolean', default: true },
 		includeLocalRenotes: { type: 'boolean', default: true },
@@ -82,6 +84,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private cacheService: CacheService,
 		private idService: IdService,
 		private fanoutTimelineService: FanoutTimelineService,
+		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 		private queryService: QueryService,
 		private metaService: MetaService,
 	) {
@@ -101,7 +104,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 			const serverSettings = await this.metaService.fetch();
 
 			if (!serverSettings.enableFanoutTimeline) {
-				return await this.getFromDb(list, {
+				const timeline = await this.getFromDb(list, {
 					untilId,
 					sinceId,
 					limit: ps.limit,
@@ -111,6 +114,10 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					withFiles: ps.withFiles,
 					withRenotes: ps.withRenotes,
 				}, me);
+
+				this.activeUsersChart.read(me);
+
+				await this.noteEntityService.packMany(timeline, me);
 			}
 
 			const [
@@ -123,24 +130,15 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				this.cacheService.userBlockedCache.fetch(me.id),
 			]);
 
-			let noteIds = await this.fanoutTimelineService.get(ps.withFiles ? `userListTimelineWithFiles:${list.id}` : `userListTimeline:${list.id}`, untilId, sinceId);
+			const timeline = await this.fanoutTimelineEndpointService.timeline({
-			noteIds = noteIds.slice(0, ps.limit);
+				untilId,
-
+				sinceId,
-			let redisTimeline: MiNote[] = [];
+				limit: ps.limit,
-
+				allowPartial: ps.allowPartial,
-			if (noteIds.length > 0) {
+				me,
-				const query = this.notesRepository.createQueryBuilder('note')
+				useDbFallback: serverSettings.enableFanoutTimelineDbFallback,
-					.where('note.id IN (:...noteIds)', { noteIds: noteIds })
+				redisTimelines: ps.withFiles ? [`userListTimelineWithFiles:${list.id}`] : [`userListTimeline:${list.id}`],
-					.innerJoinAndSelect('note.user', 'user')
+				noteFilter: note => {
-					.leftJoinAndSelect('note.reply', 'reply')
-					.leftJoinAndSelect('note.renote', 'renote')
-					.leftJoinAndSelect('reply.user', 'replyUser')
-					.leftJoinAndSelect('renote.user', 'renoteUser')
-					.leftJoinAndSelect('note.channel', 'channel');
-
-				redisTimeline = await query.getMany();
-
-				redisTimeline = redisTimeline.filter(note => {
 					if (note.userId === me.id) {
 						return true;
 					}
@@ -154,30 +152,22 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 					}
 
 					return true;
-				});
+				},
+				dbFallback: async (untilId, sinceId, limit) => await this.getFromDb(list, {
+					untilId,
+					sinceId,
+					limit,
+					includeMyRenotes: ps.includeMyRenotes,
+					includeRenotedMyNotes: ps.includeRenotedMyNotes,
+					includeLocalRenotes: ps.includeLocalRenotes,
+					withFiles: ps.withFiles,
+					withRenotes: ps.withRenotes,
+				}, me),
+			});
 
-				redisTimeline.sort((a, b) => a.id > b.id ? -1 : 1);
+			this.activeUsersChart.read(me);
-			}
 
-			if (redisTimeline.length > 0) {
+			return timeline;
-				this.activeUsersChart.read(me);
-				return await this.noteEntityService.packMany(redisTimeline, me);
-			} else {
-				if (serverSettings.enableFanoutTimelineDbFallback) { // fallback to db
-					return await this.getFromDb(list, {
-						untilId,
-						sinceId,
-						limit: ps.limit,
-						includeMyRenotes: ps.includeMyRenotes,
-						includeRenotedMyNotes: ps.includeRenotedMyNotes,
-						includeLocalRenotes: ps.includeLocalRenotes,
-						withFiles: ps.withFiles,
-						withRenotes: ps.withRenotes,
-					}, me);
-				} else {
-					return [];
-				}
-			}
 		});
 	}
 
@@ -271,10 +261,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		}
 		//#endregion
 
-		const timeline = await query.limit(ps.limit).getMany();
+		return await query.limit(ps.limit).getMany();
-
-		this.activeUsersChart.read(me);
-
-		return await this.noteEntityService.packMany(timeline, me);
 	}
 }

packages/backend/src/server/api/endpoints/users/notes.ts

@@ -5,8 +5,7 @@
 
 import { Brackets } from 'typeorm';
 import { Inject, Injectable } from '@nestjs/common';
-import * as Redis from 'ioredis';
+import type { NotesRepository } from '@/models/_.js';
-import type { MiNote, NotesRepository } from '@/models/_.js';
 import { Endpoint } from '@/server/api/endpoint-base.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
 import { DI } from '@/di-symbols.js';
@@ -14,9 +13,9 @@ import { CacheService } from '@/core/CacheService.js';
 import { IdService } from '@/core/IdService.js';
 import { isUserRelated } from '@/misc/is-user-related.js';
 import { QueryService } from '@/core/QueryService.js';
-import { FanoutTimelineService } from '@/core/FanoutTimelineService.js';
 import { MetaService } from '@/core/MetaService.js';
-import { ApiError } from '../../error.js';
+import { MiLocalUser } from '@/models/User.js';
+import { FanoutTimelineEndpointService } from '@/core/FanoutTimelineEndpointService.js';
 
 export const meta = {
 	tags: ['users', 'notes'],
@@ -52,6 +51,7 @@ export const paramDef = {
 		untilId: { type: 'string', format: 'misskey:id' },
 		sinceDate: { type: 'integer' },
 		untilDate: { type: 'integer' },
+		allowPartial: { type: 'boolean', default: false }, // true is recommended but for compatibility false by default
 		withFiles: { type: 'boolean', default: false },
 	},
 	required: ['userId'],
@@ -60,9 +60,6 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
-		@Inject(DI.redisForTimelines)
-		private redisForTimelines: Redis.Redis,
-
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
@@ -70,121 +67,130 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 		private queryService: QueryService,
 		private cacheService: CacheService,
 		private idService: IdService,
-		private fanoutTimelineService: FanoutTimelineService,
+		private fanoutTimelineEndpointService: FanoutTimelineEndpointService,
 		private metaService: MetaService,
 	) {
 		super(meta, paramDef, async (ps, me) => {
 			const untilId = ps.untilId ?? (ps.untilDate ? this.idService.gen(ps.untilDate!) : null);
 			const sinceId = ps.sinceId ?? (ps.sinceDate ? this.idService.gen(ps.sinceDate!) : null);
-			const isRangeSpecified = untilId != null && sinceId != null;
 			const isSelf = me && (me.id === ps.userId);
 
 			const serverSettings = await this.metaService.fetch();
 
-			if (serverSettings.enableFanoutTimeline && (isRangeSpecified || sinceId == null)) {
+			if (!serverSettings.enableFanoutTimeline) {
-				const [
+				const timeline = await this.getFromDb({
-					userIdsWhoMeMuting,
+					untilId,
-				] = me ? await Promise.all([
+					sinceId,
-					this.cacheService.userMutingsCache.fetch(me.id),
+					limit: ps.limit,
-				]) : [new Set<string>()];
+					userId: ps.userId,
+					withChannelNotes: ps.withChannelNotes,
+					withFiles: ps.withFiles,
+					withRenotes: ps.withRenotes,
+				}, me);
 
-				const [noteIdsRes, repliesNoteIdsRes, channelNoteIdsRes] = await Promise.all([
+				return await this.noteEntityService.packMany(timeline, me);
-					this.fanoutTimelineService.get(ps.withFiles ? `userTimelineWithFiles:${ps.userId}` : `userTimeline:${ps.userId}`, untilId, sinceId),
+			}
-					ps.withReplies ? this.fanoutTimelineService.get(`userTimelineWithReplies:${ps.userId}`, untilId, sinceId) : Promise.resolve([]),
-					ps.withChannelNotes ? this.fanoutTimelineService.get(`userTimelineWithChannel:${ps.userId}`, untilId, sinceId) : Promise.resolve([]),
-				]);
 
-				let noteIds = Array.from(new Set([
+			const [
-					...noteIdsRes,
+				userIdsWhoMeMuting,
-					...repliesNoteIdsRes,
+			] = me ? await Promise.all([
-					...channelNoteIdsRes,
+				this.cacheService.userMutingsCache.fetch(me.id),
-				]));
+			]) : [new Set<string>()];
-				noteIds.sort((a, b) => a > b ? -1 : 1);
-				noteIds = noteIds.slice(0, ps.limit);
 
-				if (noteIds.length > 0) {
+			const redisTimelines = [ps.withFiles ? `userTimelineWithFiles:${ps.userId}` : `userTimeline:${ps.userId}`];
-					const isFollowing = me && Object.hasOwn(await this.cacheService.userFollowingsCache.fetch(me.id), ps.userId);
 
-					const query = this.notesRepository.createQueryBuilder('note')
+			if (ps.withReplies) redisTimelines.push(`userTimelineWithReplies:${ps.userId}`);
-						.where('note.id IN (:...noteIds)', { noteIds: noteIds })
+			if (ps.withChannelNotes) redisTimelines.push(`userTimelineWithChannel:${ps.userId}`);
-						.innerJoinAndSelect('note.user', 'user')
-						.leftJoinAndSelect('note.reply', 'reply')
-						.leftJoinAndSelect('note.renote', 'renote')
-						.leftJoinAndSelect('reply.user', 'replyUser')
-						.leftJoinAndSelect('renote.user', 'renoteUser')
-						.leftJoinAndSelect('note.channel', 'channel');
 
-					let timeline = await query.getMany();
+			const isFollowing = me && Object.hasOwn(await this.cacheService.userFollowingsCache.fetch(me.id), ps.userId);
 
-					timeline = timeline.filter(note => {
+			const timeline = await this.fanoutTimelineEndpointService.timeline({
-						if (me && isUserRelated(note, userIdsWhoMeMuting, true)) return false;
+				untilId,
+				sinceId,
+				limit: ps.limit,
+				allowPartial: ps.allowPartial,
+				me,
+				redisTimelines,
+				useDbFallback: true,
+				noteFilter: note => {
+					if (me && isUserRelated(note, userIdsWhoMeMuting, true)) return false;
 
-						if (note.renoteId) {
+					if (note.renoteId) {
-							if (note.text == null && note.fileIds.length === 0 && !note.hasPoll) {
+						if (note.text == null && note.fileIds.length === 0 && !note.hasPoll) {
-								if (ps.withRenotes === false) return false;
+							if (ps.withRenotes === false) return false;
-							}
 						}
-
-						if (note.channel?.isSensitive && !isSelf) return false;
-						if (note.visibility === 'specified' && (!me || (me.id !== note.userId && !note.visibleUserIds.some(v => v === me.id)))) return false;
-						if (note.visibility === 'followers' && !isFollowing && !isSelf) return false;
-
-						return true;
-					});
-
-					// TODO: フィルタで件数が減った場合の埋め合わせ処理
-
-					timeline.sort((a, b) => a.id > b.id ? -1 : 1);
-
-					if (timeline.length > 0) {
-						return await this.noteEntityService.packMany(timeline, me);
 					}
-				}
-			}
 
-			//#region fallback to database
+					if (note.channel?.isSensitive && !isSelf) return false;
-			const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'), ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
+					if (note.visibility === 'specified' && (!me || (me.id !== note.userId && !note.visibleUserIds.some(v => v === me.id)))) return false;
-				.andWhere('note.userId = :userId', { userId: ps.userId })
+					if (note.visibility === 'followers' && !isFollowing && !isSelf) return false;
-				.innerJoinAndSelect('note.user', 'user')
-				.leftJoinAndSelect('note.reply', 'reply')
-				.leftJoinAndSelect('note.renote', 'renote')
-				.leftJoinAndSelect('note.channel', 'channel')
-				.leftJoinAndSelect('reply.user', 'replyUser')
-				.leftJoinAndSelect('renote.user', 'renoteUser');
 
-			if (ps.withChannelNotes) {
+					return true;
-				if (!isSelf) query.andWhere(new Brackets(qb => {
+				},
-					qb.orWhere('note.channelId IS NULL');
+				dbFallback: async (untilId, sinceId, limit) => await this.getFromDb({
-					qb.orWhere('channel.isSensitive = false');
+					untilId,
-				}));
+					sinceId,
-			} else {
+					limit,
-				query.andWhere('note.channelId IS NULL');
+					userId: ps.userId,
-			}
+					withChannelNotes: ps.withChannelNotes,
+					withFiles: ps.withFiles,
+					withRenotes: ps.withRenotes,
+				}, me),
+			});
 
-			this.queryService.generateVisibilityQuery(query, me);
+			return timeline;
-			if (me) {
-				this.queryService.generateMutedUserQuery(query, me, { id: ps.userId });
-				this.queryService.generateBlockedUserQuery(query, me);
-			}
-
-			if (ps.withFiles) {
-				query.andWhere('note.fileIds != \'{}\'');
-			}
-
-			if (ps.withRenotes === false) {
-				query.andWhere(new Brackets(qb => {
-					qb.orWhere('note.userId != :userId', { userId: ps.userId });
-					qb.orWhere('note.renoteId IS NULL');
-					qb.orWhere('note.text IS NOT NULL');
-					qb.orWhere('note.fileIds != \'{}\'');
-					qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
-				}));
-			}
-
-			const timeline = await query.limit(ps.limit).getMany();
-
-			return await this.noteEntityService.packMany(timeline, me);
-			//#endregion
 		});
 	}
+
+	private async getFromDb(ps: {
+		untilId: string | null,
+		sinceId: string | null,
+		limit: number,
+		userId: string,
+		withChannelNotes: boolean,
+		withFiles: boolean,
+		withRenotes: boolean,
+	}, me: MiLocalUser | null) {
+		const isSelf = me && (me.id === ps.userId);
+
+		const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'), ps.sinceId, ps.untilId)
+			.andWhere('note.userId = :userId', { userId: ps.userId })
+			.innerJoinAndSelect('note.user', 'user')
+			.leftJoinAndSelect('note.reply', 'reply')
+			.leftJoinAndSelect('note.renote', 'renote')
+			.leftJoinAndSelect('note.channel', 'channel')
+			.leftJoinAndSelect('reply.user', 'replyUser')
+			.leftJoinAndSelect('renote.user', 'renoteUser');
+
+		if (ps.withChannelNotes) {
+			if (!isSelf) query.andWhere(new Brackets(qb => {
+				qb.orWhere('note.channelId IS NULL');
+				qb.orWhere('channel.isSensitive = false');
+			}));
+		} else {
+			query.andWhere('note.channelId IS NULL');
+		}
+
+		this.queryService.generateVisibilityQuery(query, me);
+		if (me) {
+			this.queryService.generateMutedUserQuery(query, me, { id: ps.userId });
+			this.queryService.generateBlockedUserQuery(query, me);
+		}
+
+		if (ps.withFiles) {
+			query.andWhere('note.fileIds != \'{}\'');
+		}
+
+		if (ps.withRenotes === false) {
+			query.andWhere(new Brackets(qb => {
+				qb.orWhere('note.userId != :userId', { userId: ps.userId });
+				qb.orWhere('note.renoteId IS NULL');
+				qb.orWhere('note.text IS NOT NULL');
+				qb.orWhere('note.fileIds != \'{}\'');
+				qb.orWhere('0 < (SELECT COUNT(*) FROM poll WHERE poll."noteId" = note.id)');
+			}));
+		}
+
+		return await query.limit(ps.limit).getMany();
+	}
 }

packages/frontend/src/components/MkPagination.vue

@@ -206,6 +206,7 @@ async function init(): Promise<void> {
 	await os.api(props.pagination.endpoint, {
 		...params,
 		limit: props.pagination.limit ?? 10,
+		allowPartial: true,
 	}).then(res => {
 		for (let i = 0; i < res.length; i++) {
 			const item = res[i];