package com.ximple.eofms.util;

import java.io.File;
import java.io.FileFilter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class FileUtils {

    public static List<File> recurseDir(File dir, FileFilter filter) {
        return recurseInDirFrom(dir, filter);
    }

    private static ArrayList<File> recurseInDirFrom(File dirItem, FileFilter filter) {
        ArrayList<File> result = new ArrayList<File>();
        File[] list;
        if (filter.accept(dirItem)) {
            result.add(dirItem);
        }

        if (dirItem.isDirectory()) {
            list = dirItem.listFiles();
            for (File item : list) {
                result.addAll(recurseInDirFrom(item, filter));
            }
        }
        return result;
    }

    public static List recurseDir(String dir) {
        return recurseDir(dir, null);
    }

    public static List recurseDir(String dir, String suffix) {
        String result, _result[];

        result = recurseInDirFrom(dir, suffix);
        _result = result.split("\\|");
        return Arrays.asList(_result);
    }

    private static String recurseInDirFrom(String dirItem, String suffix) {
        File file;
        String list[];
        StringBuilder result = new StringBuilder(dirItem);

        file = new File(dirItem);
        if (file.isDirectory()) {
            list = file.list();
            for (String item : list) {
                if (suffix == null)
                    result.append("|").append(recurseInDirFrom(dirItem + File.separatorChar + item, suffix));
                else {
                    if (item.toLowerCase().endsWith(suffix)) {
                        result.append("|").append(recurseInDirFrom(dirItem + File.separatorChar + item, suffix));
                    }
                }
            }
        }
        return result.toString();
    }
}