yumechi-no-kuni/packages/backend/src/misc/check-hit-antenna.ts

import { Antenna } from '@/models/entities/antenna.js';
import { Note } from '@/models/entities/note.js';
import { User } from '@/models/entities/user.js';
import { UserListJoinings, UserGroupJoinings, Blockings } from '@/models/index.js';
import { getFullApAccount } from './convert-host.js';
import * as Acct from '@/misc/acct.js';
import { Packed } from './schema.js';
import { Cache } from './cache.js';

const blockingCache = new Cache<User['id'][]>(1000 * 60 * 5);

// NOTE: フォローしているユーザーのノート、リストのユーザーのノート、グループのユーザーのノート指定はパフォーマンス上の理由で無効になっている

/**
 * noteUserFollowers / antennaUserFollowing はどちらか一方が指定されていればよい
 */
export async function checkHitAntenna(antenna: Antenna, note: (Note | Packed<'Note'>), noteUser: { id: User['id']; username: string; host: string | null; }, noteUserFollowers?: User['id'][], antennaUserFollowing?: User['id'][]): Promise<boolean> {
	if (note.visibility === 'specified') return false;

	// アンテナ作成者がノート作成者にブロックされていたらスキップ
	const blockings = await blockingCache.fetch(noteUser.id, () => Blockings.findBy({ blockerId: noteUser.id }).then(res => res.map(x => x.blockeeId)));
	if (blockings.some(blocking => blocking === antenna.userId)) return false;

	if (note.visibility === 'followers') {
		if (noteUserFollowers && !noteUserFollowers.includes(antenna.userId)) return false;
		if (antennaUserFollowing && !antennaUserFollowing.includes(note.userId)) return false;
	}

	if (!antenna.withReplies && note.replyId != null) return false;

	if (antenna.src === 'home') {
		if (noteUserFollowers && !noteUserFollowers.includes(antenna.userId)) return false;
		if (antennaUserFollowing && !antennaUserFollowing.includes(note.userId)) return false;
	} else if (antenna.src === 'list') {
		const listUsers = (await UserListJoinings.findBy({
			userListId: antenna.userListId!,
		})).map(x => x.userId);

		if (!listUsers.includes(note.userId)) return false;
	} else if (antenna.src === 'group') {
		const joining = await UserGroupJoinings.findOneByOrFail({ id: antenna.userGroupJoiningId! });

		const groupUsers = (await UserGroupJoinings.findBy({
			userGroupId: joining.userGroupId,
		})).map(x => x.userId);

		if (!groupUsers.includes(note.userId)) return false;
	} else if (antenna.src === 'users') {
		const accts = antenna.users.map(x => {
			const { username, host } = Acct.parse(x);
			return getFullApAccount(username, host).toLowerCase();
		});
		if (!accts.includes(getFullApAccount(noteUser.username, noteUser.host).toLowerCase())) return false;
	}

	const keywords = antenna.keywords
		// Clean up
		.map(xs => xs.filter(x => x !== ''))
		.filter(xs => xs.length > 0);

	if (keywords.length > 0) {
		if (note.text == null) return false;

		const matched = keywords.some(and =>
			and.every(keyword =>
				antenna.caseSensitive
					? note.text!.includes(keyword)
					: note.text!.toLowerCase().includes(keyword.toLowerCase())
			));

		if (!matched) return false;
	}

	const excludeKeywords = antenna.excludeKeywords
		// Clean up
		.map(xs => xs.filter(x => x !== ''))
		.filter(xs => xs.length > 0);

	if (excludeKeywords.length > 0) {
		if (note.text == null) return false;

		const matched = excludeKeywords.some(and =>
			and.every(keyword =>
				antenna.caseSensitive
					? note.text!.includes(keyword)
					: note.text!.toLowerCase().includes(keyword.toLowerCase())
			));

		if (matched) return false;
	}

	if (antenna.withFile) {
		if (note.fileIds && note.fileIds.length === 0) return false;
	}

	// TODO: eval expression

	return true;
}