yumechi-no-kuni/packages/backend/src/server/api/endpoints/channels/timeline.ts

import $ from 'cafy';
import { ID } from '@/misc/cafy-id';
import define from '../../define';
import { ApiError } from '../../error';
import { Notes, Channels } from '@/models/index';
import { makePaginationQuery } from '../../common/make-pagination-query';
import { activeUsersChart } from '@/services/chart/index';

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

	requireCredential: false,

	params: {
		channelId: {
			validator: $.type(ID),
		},

		limit: {
			validator: $.optional.num.range(1, 100),
			default: 10,
		},

		sinceId: {
			validator: $.optional.type(ID),
		},

		untilId: {
			validator: $.optional.type(ID),
		},

		sinceDate: {
			validator: $.optional.num,
		},

		untilDate: {
			validator: $.optional.num,
		},
	},

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

	errors: {
		noSuchChannel: {
			message: 'No such channel.',
			code: 'NO_SUCH_CHANNEL',
			id: '4d0eeeba-a02c-4c3c-9966-ef60d38d2e7f',
		},
	},
} as const;

// eslint-disable-next-line import/no-default-export
export default define(meta, async (ps, user) => {
	const channel = await Channels.findOne({
		id: ps.channelId,
	});

	if (channel == null) {
		throw new ApiError(meta.errors.noSuchChannel);
	}

	//#region Construct query
	const query = makePaginationQuery(Notes.createQueryBuilder('note'), ps.sinceId, ps.untilId, ps.sinceDate, ps.untilDate)
		.andWhere('note.channelId = :channelId', { channelId: channel.id })
		.innerJoinAndSelect('note.user', 'user')
		.leftJoinAndSelect('note.reply', 'reply')
		.leftJoinAndSelect('note.renote', 'renote')
		.leftJoinAndSelect('reply.user', 'replyUser')
		.leftJoinAndSelect('renote.user', 'renoteUser')
		.leftJoinAndSelect('note.channel', 'channel');
	//#endregion

	const timeline = await query.take(ps.limit!).getMany();

	if (user) activeUsersChart.update(user);

	return await Notes.packMany(timeline, user);
});