From b53d6c7f8ca1a712eab44967e8d05a0cc7bcc034 Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Mon, 3 Apr 2023 12:11:16 +0900
Subject: perf(backend): store notes of an antenna to redis instead of
 postgresql

Resolve #10169
---
 .../src/server/api/endpoints/antennas/notes.ts     | 40 +++++++++++++++-------
 1 file changed, 28 insertions(+), 12 deletions(-)

(limited to 'packages/backend/src/server/api')

diff --git a/packages/backend/src/server/api/endpoints/antennas/notes.ts b/packages/backend/src/server/api/endpoints/antennas/notes.ts
index 039ba1115a..364f9d9c05 100644
--- a/packages/backend/src/server/api/endpoints/antennas/notes.ts
+++ b/packages/backend/src/server/api/endpoints/antennas/notes.ts
@@ -1,10 +1,12 @@
 import { Inject, Injectable } from '@nestjs/common';
+import Redis from 'ioredis';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import type { NotesRepository, AntennaNotesRepository, AntennasRepository } from '@/models/index.js';
+import type { NotesRepository, AntennasRepository } from '@/models/index.js';
 import { QueryService } from '@/core/QueryService.js';
 import { NoteReadService } from '@/core/NoteReadService.js';
 import { DI } from '@/di-symbols.js';
 import { NoteEntityService } from '@/core/entities/NoteEntityService.js';
+import { IdService } from '@/core/IdService.js';
 import { ApiError } from '../../error.js';
 
 export const meta = {
@@ -50,15 +52,16 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> {
 	constructor(
+		@Inject(DI.redis)
+		private redisClient: Redis.Redis,
+
 		@Inject(DI.notesRepository)
 		private notesRepository: NotesRepository,
 
 		@Inject(DI.antennasRepository)
 		private antennasRepository: AntennasRepository,
 
-		@Inject(DI.antennaNotesRepository)
-		private antennaNotesRepository: AntennaNotesRepository,
-
+		private idService: IdService,
 		private noteEntityService: NoteEntityService,
 		private queryService: QueryService,
 		private noteReadService: NoteReadService,
@@ -73,9 +76,24 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				throw new ApiError(meta.errors.noSuchAntenna);
 			}
 
-			const query = this.queryService.makePaginationQuery(this.notesRepository.createQueryBuilder('note'),
-				ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
-				.innerJoin(this.antennaNotesRepository.metadata.targetName, 'antennaNote', 'antennaNote.noteId = note.id')
+			const noteIdsRes = await this.redisClient.xrevrange(
+				`antennaTimeline:${antenna.id}`,
+				ps.untilId ? this.idService.parse(ps.untilId).date.getTime() : '+',
+				'-',
+				'COUNT', ps.limit + 1); // untilIdに指定したものも含まれるため+1
+
+			if (noteIdsRes.length === 0) {
+				return [];
+			}
+
+			const noteIds = noteIdsRes.map(x => x[1][1]).filter(x => x !== ps.untilId);
+
+			if (noteIds.length === 0) {
+				return [];
+			}
+
+			const query = this.notesRepository.createQueryBuilder('note')
+				.where('note.id IN (:...noteIds)', { noteIds: noteIds })
 				.innerJoinAndSelect('note.user', 'user')
 				.leftJoinAndSelect('user.avatar', 'avatar')
 				.leftJoinAndSelect('user.banner', 'banner')
@@ -86,16 +104,14 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				.leftJoinAndSelect('replyUser.banner', 'replyUserBanner')
 				.leftJoinAndSelect('renote.user', 'renoteUser')
 				.leftJoinAndSelect('renoteUser.avatar', 'renoteUserAvatar')
-				.leftJoinAndSelect('renoteUser.banner', 'renoteUserBanner')
-				.andWhere('antennaNote.antennaId = :antennaId', { antennaId: antenna.id });
+				.leftJoinAndSelect('renoteUser.banner', 'renoteUserBanner');
 
 			this.queryService.generateVisibilityQuery(query, me);
 			this.queryService.generateMutedUserQuery(query, me);
 			this.queryService.generateBlockedUserQuery(query, me);
 
-			const notes = await query
-				.take(ps.limit)
-				.getMany();
+			const notes = await query.getMany();
+			notes.sort((a, b) => a.id > b.id ? -1 : 1);
 
 			if (notes.length > 0) {
 				this.noteReadService.read(me.id, notes);
-- 
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