fix #10554 チャンネルの検索用ページとAPIの追加 (#10555)

* add channel search

* move  channel search to channel list page

---------

Co-authored-by: tamaina <tamaina@hotmail.co.jp>
Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
Co-authored-by: atsuchan <83960488+atsu1125@users.noreply.github.com>
Co-authored-by: Masaya Suzuki <15100604+massongit@users.noreply.github.com>
Co-authored-by: Kagami Sascha Rosylight <saschanaz@outlook.com>
Co-authored-by: taiy <53635909+taiyme@users.noreply.github.com>
Co-authored-by: xianon <xianon@hotmail.co.jp>
Co-authored-by: kabo2468 <28654659+kabo2468@users.noreply.github.com>
Co-authored-by: YS <47836716+yszkst@users.noreply.github.com>
Co-authored-by: Khsmty <me@khsmty.com>
Co-authored-by: Soni L <EnderMoneyMod@gmail.com>
Co-authored-by: mei23 <m@m544.net>
Co-authored-by: daima3629 <52790780+daima3629@users.noreply.github.com>
Co-authored-by: Windymelt <1113940+windymelt@users.noreply.github.com>

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

@@ -0,0 +1,67 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Brackets } from 'typeorm';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import { QueryService } from '@/core/QueryService.js';
+import type { ChannelsRepository } from '@/models/index.js';
+import { ChannelEntityService } from '@/core/entities/ChannelEntityService.js';
+import { DI } from '@/di-symbols.js';
+import { sqlLikeEscape } from '@/misc/sql-like-escape.js';
+
+export const meta = {
+	tags: ['channels'],
+
+	requireCredential: false,
+
+	res: {
+		type: 'array',
+		optional: false, nullable: false,
+		items: {
+			type: 'object',
+			optional: false, nullable: false,
+			ref: 'Channel',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+		query: { type: 'string' },
+		type: { type: 'string', enum: ['nameAndDescription', 'nameOnly'], default: 'nameAndDescription' },
+		sinceId: { type: 'string', format: 'misskey:id' },
+		untilId: { type: 'string', format: 'misskey:id' },
+		limit: { type: 'integer', minimum: 1, maximum: 100, default: 5 },
+	},
+	required: ['query'],
+} as const;
+
+// eslint-disable-next-line import/no-default-export
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> {
+	constructor(
+		@Inject(DI.channelsRepository)
+		private channelsRepository: ChannelsRepository,
+
+		private channelEntityService: ChannelEntityService,
+		private queryService: QueryService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const query = this.queryService.makePaginationQuery(this.channelsRepository.createQueryBuilder('channel'), ps.sinceId, ps.untilId);
+
+			if (ps.type === 'nameAndDescription') {
+				query.andWhere(new Brackets(qb => { qb
+					.where('channel.name ILIKE :q', { q: `%${ sqlLikeEscape(ps.query) }%` })
+					.orWhere('channel.description ILIKE :q', { q: `%${ sqlLikeEscape(ps.query) }%` });
+				}));
+			} else {
+				query.andWhere('channel.name ILIKE :q', { q: `%${ sqlLikeEscape(ps.query) }%` });
+			}
+
+			const channels = await query
+				.take(ps.limit)
+				.getMany();
+
+			return await Promise.all(channels.map(x => this.channelEntityService.pack(x, me)));
+		});
+	}
+}