mizzkey/src/server/activitypub.ts

import * as Router from 'koa-router';
import { parseRequest } from 'http-signature';

import { createHttp } from '../queue';
import context from '../remote/activitypub/renderer/context';
import render from '../remote/activitypub/renderer/note';
import Note from '../models/note';
import User, { isLocalUser } from '../models/user';
import renderNote from '../remote/activitypub/renderer/note';
import renderKey from '../remote/activitypub/renderer/key';
import renderPerson from '../remote/activitypub/renderer/person';
import renderOrderedCollection from '../remote/activitypub/renderer/ordered-collection';
//import parseAcct from '../acct/parse';
import config from '../config';

// Init router
const router = new Router();

//#region Routing

// inbox
router.post('/users/:user/inbox', ctx => {
	let signature;

	ctx.req.headers.authorization = 'Signature ' + ctx.req.headers.signature;

	try {
		signature = parseRequest(ctx.req);
	} catch (e) {
		ctx.status = 401;
		return;
	}

	createHttp({
		type: 'processInbox',
		activity: ctx.request.body,
		signature
	}).save();

	ctx.status = 202;
});

// note
router.get('/notes/:note', async (ctx, next) => {
	const accepted = ctx.accepts('html', 'application/activity+json', 'application/ld+json');
	if (!['application/activity+json', 'application/ld+json'].includes(accepted as string)) {
		next();
		return;
	}

	const note = await Note.findOne({
		_id: ctx.params.note
	});

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

	const rendered = await render(note);
	rendered['@context'] = context;

	ctx.body = rendered;
});

// outbot
router.get('/users/:user/outbox', async ctx => {
	const userId = ctx.params.user;

	const user = await User.findOne({ _id: userId });

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

	const notes = await Note.find({ userId: user._id }, {
		limit: 10,
		sort: { _id: -1 }
	});

	const renderedNotes = await Promise.all(notes.map(note => renderNote(note)));
	const rendered = renderOrderedCollection(`${config.url}/users/${userId}/inbox`, user.notesCount, renderedNotes);
	rendered['@context'] = context;

	ctx.body = rendered;
});

// publickey
router.get('/users/:user/publickey', async ctx => {
	const userId = ctx.params.user;

	const user = await User.findOne({ _id: userId });

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

	if (isLocalUser(user)) {
		const rendered = renderKey(user);
		rendered['@context'] = context;

		ctx.body = rendered;
	} else {
		ctx.status = 400;
	}
});

// user
router.get('/users/:user', async ctx => {
	const userId = ctx.params.user;

	const user = await User.findOne({ _id: userId });

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

	const rendered = renderPerson(user);
	rendered['@context'] = context;

	ctx.body = rendered;
});

// follow form
router.get('/authorize-follow', async ctx => {
	/* TODO
	const { username, host } = parseAcct(ctx.query.acct);
	if (host === null) {
		res.sendStatus(422);
		return;
	}

	const finger = await request(`https://${host}`)
	*/
});

//#endregion

export default router;