FoundKey/packages/backend/src/server/activitypub/outbox.ts

import Router from '@koa/router';
import { Brackets, IsNull } from 'typeorm';
import config from '@/config/index.js';
import { renderActivity } from '@/remote/activitypub/renderer/index.js';
import renderOrderedCollection from '@/remote/activitypub/renderer/ordered-collection.js';
import renderOrderedCollectionPage from '@/remote/activitypub/renderer/ordered-collection-page.js';
import renderNote from '@/remote/activitypub/renderer/note.js';
import renderCreate from '@/remote/activitypub/renderer/create.js';
import renderAnnounce from '@/remote/activitypub/renderer/announce.js';
import { renderNoteOrRenoteActivity } from '@/remote/activitypub/renderer/note-or-renote.js';
import { countIf } from '@/prelude/array.js';
import * as url from '@/prelude/url.js';
import { Users, Notes } from '@/models/index.js';
import { Note } from '@/models/entities/note.js';
import { makePaginationQuery } from '../api/common/make-pagination-query.js';
import { setResponseType } from '../activitypub.js';

export default async (ctx: Router.RouterContext) => {
	const userId = ctx.params.user;

	const sinceId = ctx.request.query.since_id;
	if (sinceId != null && typeof sinceId !== 'string') {
		ctx.status = 400;
		return;
	}

	const untilId = ctx.request.query.until_id;
	if (untilId != null && typeof untilId !== 'string') {
		ctx.status = 400;
		return;
	}

	const page = ctx.request.query.page === 'true';

	if (countIf(x => x != null, [sinceId, untilId]) > 1) {
		ctx.status = 400;
		return;
	}

	const user = await Users.findOneBy({
		id: userId,
		host: IsNull(),
	});

	if (user == null) {
		ctx.status = 404;
		return;
	}

	const limit = 20;
	const partOf = `${config.url}/users/${userId}/outbox`;

	if (page) {
		const query = makePaginationQuery(Notes.createQueryBuilder('note'), sinceId, untilId)
			.andWhere('note.userId = :userId', { userId: user.id })
			.andWhere(new Brackets(qb => { qb
				.where('note.visibility = \'public\'')
				.orWhere('note.visibility = \'home\'');
			}))
			.andWhere('NOT note.localOnly');

		const notes = await query.take(limit).getMany();

		if (sinceId) notes.reverse();

		const activities = await Promise.all(notes.map(note => renderNoteOrRenoteActivity(note)));
		const rendered = renderOrderedCollectionPage(
			`${partOf}?${url.query({
				page: 'true',
				since_id: sinceId,
				until_id: untilId,
			})}`,
			user.notesCount, activities, partOf,
			notes.length ? `${partOf}?${url.query({
				page: 'true',
				since_id: notes[0].id,
			})}` : undefined,
			notes.length ? `${partOf}?${url.query({
				page: 'true',
				until_id: notes[notes.length - 1].id,
			})}` : undefined,
		);

		ctx.body = renderActivity(rendered);
		setResponseType(ctx);
	} else {
		// index page
		const rendered = renderOrderedCollection(partOf, user.notesCount,
			`${partOf}?page=true`,
			`${partOf}?page=true&since_id=000000000000000000000000`,
		);
		ctx.body = renderActivity(rendered);
		setResponseType(ctx);
	}
};