package io.gitlab.jfronny.resclone.processors;

import io.gitlab.jfronny.resclone.data.RescloneException;
import io.gitlab.jfronny.resclone.io.PathPruneVisitor;

import java.io.IOException;
import java.nio.file.FileSystem;
import java.nio.file.Files;

public class RemoveEmptyProcessor extends PackProcessor {
    @Override
    public void process(FileSystem p) throws RescloneException {
        try {
            Files.walkFileTree(p.getPath("/assets"), new PathPruneVisitor(s -> {
                if (Files.isDirectory(s)) {
                    try {
                        return !Files.newDirectoryStream(s).iterator().hasNext();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                return false;
            }));
        } catch (Throwable e) {
            throw new RescloneException("Failed to prune empty directories", e);
        }
    }
}