Move data directory when station is renamed

And actually delete the station dir

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

@@ -176,7 +176,7 @@ public class Main extends Application {
             Path nextMessagePath = stationDirPath.resolve("next-message.txt");
             String messageText;
             if (!Files.exists(nextMessagePath)) {
-                messageText = loadedStation.generateMessage();
+                messageText = loadedStation.generateMessage(settings.getMessageGenerationAttempts());
             } else {
                 messageText = new String(Files.readAllBytes(nextMessagePath));
             }
@@ -202,9 +202,9 @@ public class Main extends Application {
                 System.exit(1);
             }
 
-            String newMessageText = loadedStation.generateMessage();
+            String newMessageText = loadedStation.generateMessage(settings.getMessageGenerationAttempts());
             Files.write(nextMessagePath, newMessageText.getBytes(StandardCharsets.UTF_8));
-        } catch (IOException e) {
+        } catch (IOException | StationSettings.MessageGenerationException e) {
             logger.log(Level.SEVERE, "Exception while posting message to station " + stationName, e);
             // TODO: Notification
             System.exit(1);

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

@@ -8,6 +8,7 @@ import java.net.URL;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.util.ArrayList;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.Random;
@@ -49,9 +50,6 @@ public class MainController implements Initializable {
 
     @FXML
     private void handleStationSettingsButtonPress() {
-        System.out.println("Button pressed!");
-        lastRetrievedLabel.setText("Button pressed!");
-
         if (settingsStage == null || !settingsStage.isShowing()) {
             try {
                 FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("StationSettingsView.fxml"));
@@ -67,6 +65,7 @@ public class MainController implements Initializable {
                     return;
                 }
                 controller.setStationSettings(selectedStation);
+                controller.setStationNameList(settings.getStations().stream().map(StationSettings::toString).toList());
 
                 settingsStage = new Stage();
                 settingsStage.initModality(Modality.APPLICATION_MODAL);
@@ -169,8 +168,12 @@ public class MainController implements Initializable {
             .findFirst()
             .orElse(null);
 
+        // TODO: if there are no stations, then create a default station and select that
+
         if (selectedStation == null) {
-            // TODO: create a new station and save it?
+            logger.log(Level.SEVERE, "Selected station '" + selectedStationName.get() + "' not found");
+            selectedStation = settings.getStations().get(0);
+            selectedStationName.set(selectedStation.getName());
         }
 
         messageTextArea.addEventFilter(KeyEvent.ANY, event -> {

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

@@ -18,8 +18,8 @@ public class MainSettings {
     private static final Logger logger = Logger.getLogger(Main.class.getName());
 
     private int digitsPerGroup;
+    private int messageGenerationAttempts;
     private String username;
-    private int refreshInterval;
     private String selectedStationName;
 
     private ArrayList<StationSettings> stations;
@@ -27,6 +27,7 @@ public class MainSettings {
     public MainSettings() {
         stations = new ArrayList<>();
         stations.add(new StationSettings("Station 1"));
+        messageGenerationAttempts = 5;
     }
 
     public static Path getSettingsFilePath() {
@@ -47,6 +48,14 @@ public class MainSettings {
         return stations;
     }
 
+    public int getMessageGenerationAttempts() {
+        return messageGenerationAttempts;
+    }
+
+    public void setMessageGenerationAttempts(int messageGenerationAttempts) {
+        this.messageGenerationAttempts = messageGenerationAttempts;
+    }
+
     public String getUsername() {
         return username;
     }
@@ -55,14 +64,6 @@ public class MainSettings {
         this.username = username;
     }
 
-    public int getRefreshInterval() {
-        return refreshInterval;
-    }
-
-    public void setRefreshInterval(int refreshInterval) {
-        this.refreshInterval = refreshInterval;
-    }
-
     public String getSelectedStationName() {
         return selectedStationName;
     }

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

@@ -1,10 +1,15 @@
 package name.nathanmcrae.numbersstation;
 
+import java.io.IOException;
+import java.util.logging.Logger;
+import java.util.logging.Level;
 import java.util.Optional;
 import javafx.collections.ListChangeListener;
 import javafx.collections.FXCollections;
 import javafx.collections.ObservableList;
 import javafx.fxml.FXML;
+import javafx.scene.control.Alert;
+import javafx.scene.control.ButtonType;
 import javafx.scene.control.ListCell;
 import javafx.scene.control.ListView;
 import javafx.scene.control.TextInputDialog;
@@ -14,6 +19,7 @@ import javafx.scene.Node;
 import javafx.stage.Stage;
 
 public class StationSelectionController {
+    private static final Logger logger = Logger.getLogger(Main.class.getName());
 
     private MainSettings settings;
 
@@ -58,6 +64,26 @@ public class StationSelectionController {
 
         Optional<String> result = dialog.showAndWait();
         result.ifPresent(stationName -> {
+            if (stationName == null || stationName.equals("")) {
+                Alert alert = new Alert(Alert.AlertType.WARNING);
+                alert.setTitle("Invalid station name");
+                alert.setHeaderText(null);
+                alert.setContentText("Station name must not be empty");
+                alert.showAndWait();
+                return;
+            }
+
+            for (StationSettings station : stationList) {
+                if (stationName.toLowerCase().equals(station.getName().toLowerCase())) {
+                    Alert alert = new Alert(Alert.AlertType.WARNING);
+                    alert.setTitle("Invalid station name");
+                    alert.setHeaderText(null);
+                    alert.setContentText("Station name '" + stationName + "' is already used.");
+                    alert.showAndWait();
+                    return;
+                }
+            }
+
             StationSettings newStation = new StationSettings(stationName);
             stationList.add(newStation);
         });
@@ -73,7 +99,16 @@ public class StationSelectionController {
     @FXML
     private void handleRemoveButtonPress(ActionEvent event) {
         int selectedIndex = stationListView.getSelectionModel().getSelectedIndex();
-        if (selectedIndex >= 0) {
+        StationSettings station = stationList.get(selectedIndex);
+        String stationName = station.toString();
+
+        String message = "Delete station '" + stationName + "'? All data will be erased.";
+        Alert alert = new Alert(Alert.AlertType.CONFIRMATION, message, ButtonType.YES, ButtonType.NO);
+        alert.setTitle("Delete station?");
+        alert.setHeaderText(null);
+        alert.showAndWait();
+
+        if (selectedIndex >= 0 && alert.getResult() == ButtonType.YES) {
             stationList.remove(selectedIndex);
         }
     }
@@ -101,6 +136,18 @@ public class StationSelectionController {
             if (change.wasRemoved()) {
                 for (StationSettings removedStation : change.getRemoved()) {
                     System.out.println("Removed: " + removedStation.getName());
+
+                    try {
+                        removedStation.deleteDir();
+                    } catch (IOException e) {
+                        logger.log(Level.SEVERE, "Exception when removing station directory", e);
+                        Alert alert = new Alert(Alert.AlertType.ERROR);
+                        alert.setTitle("Error removing station");
+                        alert.setHeaderText(null);
+                        alert.setContentText("Exception when removing station directory: " + e.getMessage());
+                        alert.showAndWait();
+                        return;
+                    }
                 }
             }
         }

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

@@ -1,15 +1,23 @@
 package name.nathanmcrae.numbersstation;
 
+import java.io.IOException;
 import java.io.UnsupportedEncodingException;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.Files;
+import java.nio.file.FileVisitResult;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.nio.file.SimpleFileVisitor;
 import java.security.SecureRandom;
 import java.time.LocalDate;
 import java.time.LocalTime;
 import java.util.ArrayList;
+import java.util.logging.Logger;
 import java.util.Random;
 
 public class StationSettings {
+    private static final Logger logger = Logger.getLogger(Main.class.getName());
+
     private String address;
     private int digitsPerGroup;
     private String externalProgramCommand;
@@ -57,6 +65,22 @@ public class StationSettings {
         scheduleStartTime = LocalTime.now();
     }
 
+    public void deleteDir() throws IOException {
+        Files.walkFileTree(stationPath(), new SimpleFileVisitor<Path>() {
+            @Override
+            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+                Files.delete(file);
+                return FileVisitResult.CONTINUE;
+            }
+
+            @Override
+            public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
+                Files.delete(dir);
+                return FileVisitResult.CONTINUE;
+            }
+        });
+    }
+
     public Path stationPath() {
         String configHome = System.getenv("XDG_CONFIG_HOME");
         Path directoryPath;
@@ -76,18 +100,51 @@ public class StationSettings {
         return directoryPath.resolve(stationDirName);
     }
 
-    public String generateMessage() {
+    public String generateMessage(int generationAttempts) throws MessageGenerationException {
         SecureRandom random = new SecureRandom();
         StringBuilder messageBuilder = new StringBuilder();
 
+        int attemptsLeft = generationAttempts;
+        boolean noPrefixCollisions = false;
+
+        while (!noPrefixCollisions) {
+            messageBuilder = new StringBuilder();
+
             for (int i = 0; i < messageLength; i++) {
-            if (i > 0 && i % digitsPerGroup == 0) {
-                messageBuilder.append(" ");
-            }
                 messageBuilder.append(random.nextInt(10));
             }
 
-        return messageBuilder.toString();
+            String message = messageBuilder.toString();
+
+            boolean prefixCollision = false;
+
+            for (String prefix : prefixes) {
+                if (message.startsWith(prefix)) {
+                    prefixCollision = true;
+                }
+            }
+
+            if (!prefixCollision) {
+                noPrefixCollisions = true;
+            }
+
+            attemptsLeft--;
+            if (prefixCollision && attemptsLeft <= 0) {
+                throw new MessageGenerationException("Failed " + generationAttempts + " attempts to generate message without matching prefixes. Ensure prefixes are valid.");
+            }
+        }
+
+        String messageNoSpaces = messageBuilder.toString();
+        StringBuilder messageFormattedBuilder = new StringBuilder();
+
+        for (int i = 0; i < messageNoSpaces.length(); i++) {
+            if (i > 0 && i % digitsPerGroup == 0) {
+                messageFormattedBuilder.append(" ");
+            }
+            messageFormattedBuilder.append(messageNoSpaces.charAt(i));
+        }
+
+        return messageFormattedBuilder.toString();
     }
 
     public String getAddress() {
@@ -197,4 +254,10 @@ public class StationSettings {
     public String toString() {
         return name;
     }
+
+    public class MessageGenerationException extends Exception {
+        public MessageGenerationException(String message) {
+            super(message);
+        }
+    }
 }

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

@@ -10,9 +10,13 @@ import com.tearsofaunicorn.wordpress.api.model.Post;
 import com.tearsofaunicorn.wordpress.api.WordpressClient;
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.time.format.DateTimeFormatter;
 import java.time.LocalDate;
 import java.time.LocalTime;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.Optional;
@@ -30,6 +34,7 @@ import javafx.collections.ObservableList;
 import javafx.event.Event;
 import javafx.fxml.FXML;
 import javafx.fxml.FXMLLoader;
+import javafx.scene.control.Alert;
 import javafx.scene.control.Button;
 import javafx.scene.control.CheckBox;
 import javafx.scene.control.DatePicker;
@@ -74,6 +79,8 @@ public class StationSettingsController {
     private StringProperty scheduleStartTime = new SimpleStringProperty();
     private StringProperty username = new SimpleStringProperty();
 
+    private ArrayList<String> stationNames = new ArrayList<String>();
+
     @FXML
     private Label connectionTestStatusLabel;
 
@@ -390,6 +397,29 @@ public class StationSettingsController {
 
     @FXML
     private void handleSaveButtonPress(Event e) {
+        if (stationName.get() == null || stationName.get().equals("")) {
+            Alert alert = new Alert(Alert.AlertType.WARNING);
+            alert.setTitle("Invalid station name");
+            alert.setHeaderText(null);
+            alert.setContentText("Station name must not be empty");
+            alert.showAndWait();
+            return;
+        }
+
+        if (!stationName.get().toLowerCase().equals(settings.getName().toLowerCase())) {
+            for (String otherStationName : stationNames) {
+                if (stationName.get().toLowerCase().equals(otherStationName.toLowerCase())) {
+                    Alert alert = new Alert(Alert.AlertType.WARNING);
+                    alert.setTitle("Invalid station name");
+                    alert.setHeaderText(null);
+                    alert.setContentText("Station name '" + stationName.get() + "' is already used.");
+                    alert.showAndWait();
+                    return;
+                }
+            }
+        }
+
+        Path oldDirectory = settings.stationPath();
         settings.setAddress(stationAddress.get());
         settings.setDigitsPerGroup(digitsPerGroup.get());
         settings.setExternalProgramCommand(externalProgramCommand.get());
@@ -404,6 +434,14 @@ public class StationSettingsController {
         settings.setScheduleStartDate(scheduleStartDatePicker.getValue());
         settings.setUsername(username.get());
 
+        try {
+            if (!oldDirectory.toString().equals(settings.stationPath().toString())) {
+                Files.move(oldDirectory, settings.stationPath());
+            }
+        } catch (IOException ex) {
+            logger.log(Level.SEVERE, "Failed to move directory", ex);
+        }
+
         try {
             DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss");
             LocalTime startTime = LocalTime.parse(scheduleStartTimeField.getText(), formatter);
@@ -419,6 +457,7 @@ public class StationSettingsController {
             logger.log(Level.SEVERE, "Unsupported OS " + osName);
         } else {
             logger.log(Level.SEVERE, "Unsupported OS " + osName);
+            // TODO: Alert
         }
 
         Node node = (Node) e.getSource();
@@ -483,6 +522,11 @@ public class StationSettingsController {
         return stationAddress;
     }
 
+    public void setStationNameList(List<String> newStationNames) {
+        stationNames.clear();
+        stationNames.addAll(newStationNames);
+    }
+
     public void setStationSettings(StationSettings newSettings) {
         settings = newSettings;