misskey/src/services/blocking/delete.ts

import { isLocalUser, isRemoteUser, IUser } from '../../models/user';
import Blocking from '../../models/blocking';
import { renderActivity } from '../../remote/activitypub/renderer';
import renderBlock from '../../remote/activitypub/renderer/block';
import renderUndo from '../../remote/activitypub/renderer/undo';
import { deliver } from '../../queue';

export default async function(blocker: IUser, blockee: IUser) {
	const blocking = await Blocking.findOne({
		blockerId: blocker._id,
		blockeeId: blockee._id
	});

	if (blocking == null) {
		console.warn('ブロック解除がリクエストされましたがブロックしていませんでした');
		return;
	}

	Blocking.remove({
		_id: blocking._id
	});

	// deliver if remote bloking
	if (isLocalUser(blocker) && isRemoteUser(blockee)) {
		const content = renderActivity(renderUndo(renderBlock(blocker, blockee), blocker));
		deliver(blocker, content, blockee.inbox);
	}
}