rudeshark.net/src/services/following/requests/reject.ts

import User, { IUser, isRemoteUser, ILocalUser, pack as packUser } from '../../../models/user';
import FollowRequest from '../../../models/follow-request';
import pack from '../../../remote/activitypub/renderer';
import renderFollow from '../../../remote/activitypub/renderer/follow';
import renderReject from '../../../remote/activitypub/renderer/reject';
import { deliver } from '../../../queue';
import { publishUserStream } from '../../../stream';

export default async function(followee: IUser, follower: IUser) {
	if (isRemoteUser(follower)) {
		const content = pack(renderReject(renderFollow(follower, followee)));
		deliver(followee as ILocalUser, content, follower.inbox);
	}

	await FollowRequest.remove({
		followeeId: followee._id,
		followerId: follower._id
	});

	User.update({ _id: followee._id }, {
		$inc: {
			pendingReceivedFollowRequestsCount: -1
		}
	});

	packUser(followee, follower).then(packed => publishUserStream(follower._id, 'unfollow', packed));
}