added localization options

//todo add all the strings

app/src/main/java/org/toop/Main.java

@@ -1,5 +1,6 @@
 package org.toop;
 
+import org.toop.app.gui.LocalServerSelector;
 import org.toop.framework.networking.NetworkingClientManager;
 import org.toop.framework.networking.NetworkingInitializationException;
 
@@ -7,6 +8,7 @@ import org.toop.framework.networking.NetworkingInitializationException;
 public class Main {
 	public static void main(String[] args) {
 		initSystems();
+        javax.swing.SwingUtilities.invokeLater(LocalServerSelector::new);
 	}
 
 	private static void initSystems() throws NetworkingInitializationException {

app/src/main/java/org/toop/app/gui/LocalServerSelector.java

@@ -1,15 +1,23 @@
 package org.toop.app.gui;
 
+import org.toop.events.WindowEvents;
+import org.toop.framework.eventbus.EventFlow;
+import org.toop.local.AppContext;
+
 import javax.swing.*;
+import java.util.Locale;
+import java.util.ResourceBundle;
 
 public class LocalServerSelector {
     private JPanel panel1;
     private JButton serverButton;
     private JButton localButton;
     private final JFrame frame;
+    Locale locale = AppContext.getLocale();
+    ResourceBundle resourceBundle = ResourceBundle.getBundle("Localization", locale);
 
     public LocalServerSelector() {
-        frame = new JFrame("Server Selector");
+        frame = new JFrame(resourceBundle.getString("windowTitleServerSelector"));
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         frame.setContentPane(panel1);
         frame.setSize(1920, 1080);
@@ -17,9 +25,15 @@ public class LocalServerSelector {
         frame.setVisible(true);
 
         serverButton.addActionListener(e -> onServerClicked());
+        serverButton.setText(resourceBundle.getString("buttonSelectServer"));
         localButton.addActionListener(e -> onLocalClicked());
+        localButton.setText(resourceBundle.getString("buttonSelectLocal"));
+        new EventFlow().listen(WindowEvents.LanguageChanged.class, this::changeLanguage);
+    }
+    private void changeLanguage(WindowEvents.LanguageChanged event) {
+        locale = AppContext.getLocale();
+        resourceBundle = ResourceBundle.getBundle("Localization", locale);
     }
-
     private void onServerClicked() {
         frame.dispose();
         new RemoteGameSelector();

app/src/main/java/org/toop/events/WindowEvents.java

@@ -22,4 +22,7 @@ public class WindowEvents extends EventsBase {
 
     /** Triggers when the mouse is released within the window. */
     public record OnMouseRelease(int button) implements EventWithoutSnowflake {}
+
+    /** Triggers when the language is changed. */
+    public record LanguageChanged() implements EventWithoutSnowflake {}
 }

app/src/main/java/org/toop/local/AppContext.java

@@ -0,0 +1,14 @@
+package org.toop.local;
+
+import java.util.Locale;
+
+public class AppContext {
+    private static Locale currentLocale = Locale.getDefault();
+
+    public static void setCurrentLocale(Locale locale) {
+        currentLocale = locale;
+    }
+    public static Locale getLocale() {
+        return currentLocale;
+    }
+}

app/src/main/java/org/toop/tictactoe/gui/UIGameBoard.java

@@ -2,11 +2,16 @@ package org.toop.tictactoe.gui;
 
 import java.awt.*;
 import java.awt.event.ActionEvent;
+import java.util.Locale;
+import java.util.ResourceBundle;
 import javax.swing.*;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.toop.app.gui.LocalGameSelector;
 import org.toop.app.gui.RemoteGameSelector;
+import org.toop.events.WindowEvents;
+import org.toop.framework.eventbus.EventFlow;
+import org.toop.local.AppContext;
 import org.toop.tictactoe.LocalTicTacToe;
 import org.toop.game.GameBase;
 
@@ -26,6 +31,8 @@ public class UIGameBoard {
     private LocalTicTacToe localTicTacToe;
 
     private boolean gameOver = false;
+    Locale locale = AppContext.getLocale();
+    ResourceBundle resourceBundle = ResourceBundle.getBundle("Localization", locale);
 
     public UIGameBoard(LocalTicTacToe lttt, Object parent) {
         if (!(parent == null)) {
@@ -43,7 +50,7 @@ public class UIGameBoard {
         tttPanel = new JPanel(new BorderLayout());
 
         // Back button
-        backToMainMenuButton = new JButton("Back to Main Menu");
+        backToMainMenuButton = new JButton(resourceBundle.getString("buttonBackToMainMenu"));
         tttPanel.add(backToMainMenuButton, BorderLayout.SOUTH);
         backToMainMenuButton.addActionListener(
                 _ -> {
@@ -65,7 +72,11 @@ public class UIGameBoard {
         //                cells[moveIndex].setText(String.valueOf(symbol));
         //            });
         //        });
-
+        new EventFlow().listen(WindowEvents.LanguageChanged.class, this::changeLanguage);
+    }
+    private void changeLanguage(WindowEvents.LanguageChanged event) {
+        locale = AppContext.getLocale();
+        resourceBundle = ResourceBundle.getBundle("Localization", locale);
     }
 
     private JPanel createGridPanel(int sizeX, int sizeY) {

app/src/main/resources/Localization.properties

@@ -0,0 +1,9 @@
+# Window titles
+windowTitleServerSelector=Server Selector
+
+# Buttons on the server selector screen
+buttonSelectServer=Connect to a server
+buttonSelectLocal=Play a game on this computer
+
+# Buttons on the UI gameboard
+buttonBackToMainMenu=Go back to the main menu

app/src/main/resources/Localization_nl.properties

@@ -0,0 +1,2 @@
+# Window titles
+windowTitleServerSelector=Selecteer een server