misskey/packages/backend/src/server/api/endpoints/notes/reactions.ts

import { Inject, Injectable } from '@nestjs/common';
import type { NoteReactionsRepository } from '@/models/index.js';
import type { NoteReaction } from '@/models/entities/NoteReaction.js';
import { Endpoint } from '@/server/api/endpoint-base.js';
import { NoteReactionEntityService } from '@/core/entities/NoteReactionEntityService.js';
import { DI } from '@/di-symbols.js';
import type { FindOptionsWhere } from 'typeorm';

export const meta = {
	tags: ['notes', 'reactions'],

	requireCredential: false,

	allowGet: true,
	cacheSec: 60,

	res: {
		type: 'array',
		optional: false, nullable: false,
		items: {
			type: 'object',
			optional: false, nullable: false,
			ref: 'NoteReaction',
		},
	},

	errors: {
		noSuchNote: {
			message: 'No such note.',
			code: 'NO_SUCH_NOTE',
			id: '263fff3d-d0e1-4af4-bea7-8408059b451a',
		},
	},
} as const;

export const paramDef = {
	type: 'object',
	properties: {
		noteId: { type: 'string', format: 'misskey:id' },
		type: { type: 'string', nullable: true },
		limit: { type: 'integer', minimum: 1, maximum: 100, default: 10 },
		offset: { type: 'integer', default: 0 },
		sinceId: { type: 'string', format: 'misskey:id' },
		untilId: { type: 'string', format: 'misskey:id' },
	},
	required: ['noteId'],
} as const;

// eslint-disable-next-line import/no-default-export
@Injectable()
export default class extends Endpoint<typeof meta, typeof paramDef> {
	constructor(
		@Inject(DI.noteReactionsRepository)
		private noteReactionsRepository: NoteReactionsRepository,

		private noteReactionEntityService: NoteReactionEntityService,
	) {
		super(meta, paramDef, async (ps, me) => {
			const query = {
				noteId: ps.noteId,
			} as FindOptionsWhere<NoteReaction>;

			if (ps.type) {
				// ローカルリアクションはホスト名が . とされているが
				// DB 上ではそうではないので、必要に応じて変換
				const suffix = '@.:';
				const type = ps.type.endsWith(suffix) ? ps.type.slice(0, ps.type.length - suffix.length) + ':' : ps.type;
				query.reaction = type;
			}

			const reactions = await this.noteReactionsRepository.find({
				where: query,
				take: ps.limit,
				skip: ps.offset,
				order: {
					id: -1,
				},
				relations: ['user', 'note'],
			});

			return await Promise.all(reactions.map(reaction => this.noteReactionEntityService.pack(reaction, me)));
		});
	}
}