import path from 'path';
import fse from 'fs-extra';

export default async function renameMap(file: string, map: (name: string) => string | null): Promise<void> {
	const info = await fse.stat(file);

	if (info.isFile()) {
		const newName = map(path.basename(file));

		if (newName !== null) {
			fse.rename(file, path.join(path.dirname(file), newName));
		}
	} else {
		const subFiles = await fse.readdir(file);

		for (const subFile of subFiles) {
			await renameMap(path.join(file, subFile), map);
		}
	}
}