fix: サジェストされるユーザのリストアップ方法を見直し (#14180)

* fix: サジェストされるユーザのリストアップ方法を見直し

* fix comment

* fix CHANGELOG.md

* ノートの無いユーザ（updatedAtが無いユーザ）は含めないらしい

* fix test

packages/backend/src/server/api/endpoints/users/search-by-username-and-host.ts

@@ -3,15 +3,9 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import { Brackets } from 'typeorm';
-import { Inject, Injectable } from '@nestjs/common';
-import type { UsersRepository, FollowingsRepository } from '@/models/_.js';
-import type { Config } from '@/config.js';
-import type { MiUser } from '@/models/User.js';
+import { Injectable } from '@nestjs/common';
 import { Endpoint } from '@/server/api/endpoint-base.js';
-import { UserEntityService } from '@/core/entities/UserEntityService.js';
-import { DI } from '@/di-symbols.js';
-import { sqlLikeEscape } from '@/misc/sql-like-escape.js';
+import { UserSearchService } from '@/core/UserSearchService.js';
 
 export const meta = {
 	tags: ['users'],
@@ -49,89 +43,16 @@ export const paramDef = {
 @Injectable()
 export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-disable-line import/no-default-export
 	constructor(
-		@Inject(DI.config)
-		private config: Config,
-
-		@Inject(DI.usersRepository)
-		private usersRepository: UsersRepository,
-
-		@Inject(DI.followingsRepository)
-		private followingsRepository: FollowingsRepository,
-
-		private userEntityService: UserEntityService,
+		private userSearchService: UserSearchService,
 	) {
-		super(meta, paramDef, async (ps, me) => {
-			const setUsernameAndHostQuery = (query = this.usersRepository.createQueryBuilder('user')) => {
-				if (ps.username) {
-					query.andWhere('user.usernameLower LIKE :username', { username: sqlLikeEscape(ps.username.toLowerCase()) + '%' });
-				}
-
-				if (ps.host) {
-					if (ps.host === this.config.hostname || ps.host === '.') {
-						query.andWhere('user.host IS NULL');
-					} else {
-						query.andWhere('user.host LIKE :host', {
-							host: sqlLikeEscape(ps.host.toLowerCase()) + '%',
-						});
-					}
-				}
-
-				return query;
-			};
-
-			const activeThreshold = new Date(Date.now() - (1000 * 60 * 60 * 24 * 30)); // 30日
-
-			let users: MiUser[] = [];
-
-			if (me) {
-				const followingQuery = this.followingsRepository.createQueryBuilder('following')
-					.select('following.followeeId')
-					.where('following.followerId = :followerId', { followerId: me.id });
-
-				const query = setUsernameAndHostQuery()
-					.andWhere(`user.id IN (${ followingQuery.getQuery() })`)
-					.andWhere('user.id != :meId', { meId: me.id })
-					.andWhere('user.isSuspended = FALSE')
-					.andWhere(new Brackets(qb => {
-						qb
-							.where('user.updatedAt IS NULL')
-							.orWhere('user.updatedAt > :activeThreshold', { activeThreshold: activeThreshold });
-					}));
-
-				query.setParameters(followingQuery.getParameters());
-
-				users = await query
-					.orderBy('user.usernameLower', 'ASC')
-					.limit(ps.limit)
-					.getMany();
-
-				if (users.length < ps.limit) {
-					const otherQuery = setUsernameAndHostQuery()
-						.andWhere(`user.id NOT IN (${ followingQuery.getQuery() })`)
-						.andWhere('user.isSuspended = FALSE')
-						.andWhere('user.updatedAt IS NOT NULL');
-
-					otherQuery.setParameters(followingQuery.getParameters());
-
-					const otherUsers = await otherQuery
-						.orderBy('user.updatedAt', 'DESC')
-						.limit(ps.limit - users.length)
-						.getMany();
-
-					users = users.concat(otherUsers);
-				}
-			} else {
-				const query = setUsernameAndHostQuery()
-					.andWhere('user.isSuspended = FALSE')
-					.andWhere('user.updatedAt IS NOT NULL');
-
-				users = await query
-					.orderBy('user.updatedAt', 'DESC')
-					.limit(ps.limit - users.length)
-					.getMany();
-			}
-
-			return await this.userEntityService.packMany(users, me, { schema: ps.detail ? 'UserDetailed' : 'UserLite' });
+		super(meta, paramDef, (ps, me) => {
+			return this.userSearchService.search({
+				username: ps.username,
+				host: ps.host,
+			}, {
+				limit: ps.limit,
+				detail: ps.detail,
+			}, me);
 		});
 	}
 }