misskey/packages/backend/src/services/suspend-user.ts

import renderDelete from '@/remote/activitypub/renderer/delete';
import { renderActivity } from '@/remote/activitypub/renderer/index';
import { deliver } from '@/queue/index';
import config from '@/config/index';
import { User } from '@/models/entities/user';
import { Users, Followings } from '@/models/index';
import { Not, IsNull } from 'typeorm';

export async function doPostSuspend(user: { id: User['id']; host: User['host'] }) {
	if (Users.isLocalUser(user)) {
		// 知り得る全SharedInboxにDelete配信
		const content = renderActivity(renderDelete(`${config.url}/users/${user.id}`, user));

		const queue: string[] = [];

		const followings = await Followings.find({
			where: [
				{ followerSharedInbox: Not(IsNull()) },
				{ followeeSharedInbox: Not(IsNull()) },
			],
			select: ['followerSharedInbox', 'followeeSharedInbox'],
		});

		const inboxes = followings.map(x => x.followerSharedInbox || x.followeeSharedInbox);

		for (const inbox of inboxes) {
			if (inbox != null && !queue.includes(inbox)) queue.push(inbox);
		}

		for (const inbox of queue) {
			deliver(user, content, inbox);
		}
	}
}