feat: チャンネルをお気に入りに登録できるように

Resolve #10097

packages/backend/src/server/api/endpoints/channels/my-favorites.ts

@@ -0,0 +1,54 @@
+import { Inject, Injectable } from '@nestjs/common';
+import { Endpoint } from '@/server/api/endpoint-base.js';
+import type { ChannelFavoritesRepository } from '@/models/index.js';
+import { QueryService } from '@/core/QueryService.js';
+import { ChannelEntityService } from '@/core/entities/ChannelEntityService.js';
+import { DI } from '@/di-symbols.js';
+
+export const meta = {
+	tags: ['channels', 'account'],
+
+	requireCredential: true,
+
+	kind: 'read:channels',
+
+	res: {
+		type: 'array',
+		optional: false, nullable: false,
+		items: {
+			type: 'object',
+			optional: false, nullable: false,
+			ref: 'Channel',
+		},
+	},
+} as const;
+
+export const paramDef = {
+	type: 'object',
+	properties: {
+	},
+	required: [],
+} as const;
+
+// eslint-disable-next-line import/no-default-export
+@Injectable()
+export default class extends Endpoint<typeof meta, typeof paramDef> {
+	constructor(
+		@Inject(DI.channelFavoritesRepository)
+		private channelFavoritesRepository: ChannelFavoritesRepository,
+
+		private channelEntityService: ChannelEntityService,
+		private queryService: QueryService,
+	) {
+		super(meta, paramDef, async (ps, me) => {
+			const query = this.channelFavoritesRepository.createQueryBuilder('favorite')
+				.andWhere('favorite.userId = :meId', { meId: me.id })
+				.leftJoinAndSelect('favorite.channel', 'channel');
+
+			const favorites = await query
+				.getMany();
+
+			return await Promise.all(favorites.map(x => this.channelEntityService.pack(x.channel!, me)));
+		});
+	}
+}