Minecraft-Server-Launcher/src/main/java/net/knarcraft/minecraftserverlauncher/userinterface/BackupGUI.java

package net.knarcraft.minecraftserverlauncher.userinterface;

import net.knarcraft.minecraftserverlauncher.utility.BackupUtil;

import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;

import static net.knarcraft.minecraftserverlauncher.utility.CommonFunctions.getResourceAsStream;

/**
 * The Backup GUI is used to display backup progress
 */
public class BackupGUI implements ActionListener {
    private static JFrame frame;
    private static JTextArea progressTextArea;
    private static JProgressBar progressBar;
    private static JButton cancelButton;

    /**
     * Instantiates a new GUI
     */
    public BackupGUI() {
        instantiate();
    }

    /**
     * Initializes the server consoles frame
     */
    public void instantiate() {
        if (frame != null) {
            return;
        }
        frame = new JFrame("Running backup...");
        frame.setBounds(100, 100, 500, 140);
        frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        ImageIcon img;
        try {
            img = new ImageIcon(ImageIO.read(getResourceAsStream("GUIIcon.png")));
            frame.setIconImage(img.getImage());
        } catch (IOException ignored) {
        }

        progressTextArea = new JTextArea();
        progressTextArea.setEditable(false);
        progressBar = new JProgressBar();
        cancelButton = new JButton("Cancel");
        JPanel panel = new JPanel();
        panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));
        panel.add(progressTextArea);
        panel.add(Box.createRigidArea(new Dimension(0, 5)));
        panel.add(progressBar);

        JPanel buttonPane = new JPanel();
        buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.LINE_AXIS));
        buttonPane.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
        buttonPane.add(Box.createHorizontalGlue());
        buttonPane.add(cancelButton);
        cancelButton.addActionListener(BackupGUI.this);

        panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        Container contentPane = frame.getContentPane();
        contentPane.add(panel, BorderLayout.CENTER);
        contentPane.add(buttonPane, BorderLayout.PAGE_END);
        frame.setVisible(true);
    }

    /**
     * Updates information about the backup progress
     *
     * @param infoText        <p>The text to display</p>
     * @param progressPercent <p>The new percent of the progress bar</p>
     */
    public static void updateProgress(String infoText, int progressPercent) {
        if (progressTextArea != null) {
            progressTextArea.setText(infoText);
        }
        if (progressBar != null) {
            progressBar.setValue(progressPercent);
        }
    }

    /**
     * Destroys the backup GUI
     */
    public static void destroy() {
        if (frame != null) {
            frame.dispose();
            frame = null;
            progressBar = null;
            progressTextArea = null;
            cancelButton = null;
        }
    }

    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        if (actionEvent.getSource() == cancelButton) {
            BackupUtil.abortBackup();
            destroy();
        }
    }
}