Add updateStationSettings

src/main/java/name/nathanmcrae/numbersstation/MainController.java

@@ -7,12 +7,14 @@ import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.Random;
 import java.util.ResourceBundle;
 import javafx.beans.property.SimpleStringProperty;
 import javafx.beans.property.StringProperty;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
 import javafx.fxml.Initializable;
+import javafx.scene.control.Alert;
 import javafx.scene.control.Label;
 import javafx.scene.control.TextArea;
 import javafx.scene.control.TextField;
@@ -51,6 +53,14 @@ public class MainController implements Initializable {
                 Parent root = fxmlLoader.load();
 
                 MainSettingsController controller = fxmlLoader.getController();
+                if (selectedStation == null) {
+                    Alert alert = new Alert(Alert.AlertType.WARNING);
+                    alert.setTitle("Invalid Station Selected");
+                    alert.setHeaderText(null);
+                    alert.setContentText("Invalid station selected. Please choose a station.");
+                    alert.showAndWait();
+                    return;
+                }
                 controller.setStationSettings(selectedStation);
 
                 settingsStage = new Stage();
@@ -59,7 +69,7 @@ public class MainController implements Initializable {
                 settingsStage.setScene(new Scene(root));
                 settingsStage.show();
                 settingsStage.setOnHiding(event -> {
-                        settings.save();
+                    updateStationSettings(selectedStation);
                 });
             } catch (Exception e) {
                 e.printStackTrace();
@@ -76,7 +86,6 @@ public class MainController implements Initializable {
                 FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("StationSelectionView.fxml"));
                 Parent root = fxmlLoader.load();
 
-                // Pass settings to the controller
                 StationSelectionController controller = fxmlLoader.getController();
                 controller.setSettings(settings);
 
@@ -92,13 +101,7 @@ public class MainController implements Initializable {
                             .filter(station -> station.getName().equals(newStationName))
                             .findFirst()
                             .orElse(null);
-                    if (newSelectedStation != null) {
+                    updateStationSettings(newSelectedStation);
-                        selectedStation = newSelectedStation;
-                        selectedStationName.set(newStationName);
-                        settings.setSelectedStationName(selectedStationName.get());
-
-                        settings.save();
-                    }
                 });
             } catch (Exception e) {
                 e.printStackTrace();
@@ -111,6 +114,7 @@ public class MainController implements Initializable {
     private void loadSettings() throws IOException {
         XmlMapper xmlMapper = new XmlMapper();
         String userHome = System.getProperty("user.home");
+        // TODO: XDG
         Path directoryPath = Paths.get(userHome, ".numbers-station");
         Path filePath = directoryPath.resolve("settings.xml");
         try {
@@ -203,4 +207,31 @@ public class MainController implements Initializable {
             }
         });
     }
+
+    private void updateStationSettings(StationSettings newStationSettings) {
+        if (newStationSettings == null) {
+            return;
+        }
+
+        selectedStation = newStationSettings;
+        selectedStationName.set(newStationSettings.getName());
+        settings.setSelectedStationName(selectedStationName.get());
+
+        settings.save();
+
+        // TODO: Load message from file
+        // If the message we're overwriting is different from its file, then prompt to confirm
+
+        Random random = new Random();
+        StringBuilder messageBuilder = new StringBuilder();
+
+        for (int i = 0; i < selectedStation.getMessageLength(); i++) {
+            if (i > 0 && i % selectedStation.getDigitsPerGroup() == 0) {
+                messageBuilder.append(" ");
+            }
+            messageBuilder.append(random.nextInt(10));
+        }
+
+        messageTextArea.setText(messageBuilder.toString());
+    }
 }