/*
 * Copyright 2004 - 2013 Wayne Grant
 *           2013 - 2025 Kai Kramer
 *
 * This file is part of KeyStore Explorer.
 *
 * KeyStore Explorer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * KeyStore Explorer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with KeyStore Explorer.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.kse.gui;

import java.io.File;
import java.util.Properties;

/**
 * Simple class intended to store the current directory for a file centric GUI
 * application. Wraps the "user.dir" System property.
 */
public class CurrentDirectory {
    static {
        initialiseWorkingDirToBeHomeDir();
    }

    private CurrentDirectory() {
    }

    private static void initialiseWorkingDirToBeHomeDir() {
        String homeDir = System.getProperty("user.home");

        if (homeDir != null) {
            System.setProperty("user.dir", homeDir);
        }
    }

    /**
     * Update CurrentDirectory to be the supplied directory.
     *
     * @param directory Used to set current directory
     */
    public static void update(File directory) {
        if (directory != null && directory.exists()) {
            Properties sysProps = new Properties(System.getProperties());
            sysProps.setProperty("user.dir", directory.getAbsolutePath());
            System.setProperties(sysProps);
        }
    }

    /**
     * Update CurrentDirectory based on the supplied file. If the file exists
     * then its parent is used.
     *
     * @param file Used to set current directory
     */
    public static void updateForFile(File file) {
        if (file != null) {
            File directory = file.getParentFile();

            update(directory);
        }
    }

    /**
     * Get the current directory.
     *
     * @return Current directory
     */
    public static File get() {
        return new File(System.getProperty("user.dir"));
    }
}
