misskey/src/api/models/drive-file.ts

import db from '../../db/mongodb';

export default db.get('drive_files') as any; // fuck type definition

export function validateFileName(name: string): boolean {
	return (
		(name.trim().length > 0) &&
		(name.length <= 200) &&
		(name.indexOf('\\') === -1) &&
		(name.indexOf('/') === -1) &&
		(name.indexOf('..') === -1)
	);
}