Improved SystemCommand mechanism, added Alert- and ShutdownHelper, and

... added askForConfirmation option

client/src/main/java/envoy/client/ui/controller/ContactSearchTab.java

@@ -8,6 +8,7 @@ import javafx.scene.control.*;
 import javafx.scene.control.Alert.AlertType;
 
 import envoy.client.event.*;
+import envoy.client.helper.AlertHelper;
 import envoy.client.ui.listcell.*;
 import envoy.data.User;
 import envoy.event.ElementOperation;
@@ -42,9 +43,10 @@ public class ContactSearchTab implements EventListener {
 	@FXML
 	private ListView<User> userList;
 
-	private Alert alert = new Alert(AlertType.CONFIRMATION);
 	private User currentlySelectedUser;
 
+	private final Alert alert = new Alert(AlertType.CONFIRMATION);
+
 	private static final EventBus	eventBus	= EventBus.getInstance();
 	private static final Logger		logger		= EnvoyLog.getLogger(ChatScene.class);
 
@@ -52,6 +54,7 @@ public class ContactSearchTab implements EventListener {
 	private void initialize() {
 		eventBus.registerListener(this);
 		userList.setCellFactory(new ListCellFactory<>(ContactControl::new));
+		alert.setTitle("Add User?");
 	}
 
 	@Event
@@ -102,17 +105,24 @@ public class ContactSearchTab implements EventListener {
 	private void userListClicked() {
 		final var user = userList.getSelectionModel().getSelectedItem();
 		if (user != null) {
-			currentlySelectedUser	= user;
-			final var event = new ContactOperation(currentlySelectedUser, ElementOperation.ADD);
-			// Sends the event to the server
-			eventBus.dispatch(new SendEvent(event));
-			// Removes the chosen user and updates the UI
-			userList.getItems().remove(currentlySelectedUser);
-			eventBus.dispatch(event);
-			logger.log(Level.INFO, "Added user " + currentlySelectedUser);
+			currentlySelectedUser = user;
+			alert.setContentText("Add user " + currentlySelectedUser.getName() + " to your contacts?");
+			AlertHelper.confirmAction(alert, this::addAsContact);
 		}
 	}
 
+	private void addAsContact() { 
+		
+		// Sends the event to the server
+		final var event = new ContactOperation(currentlySelectedUser, ElementOperation.ADD);
+		eventBus.dispatch(new SendEvent(event));
+		
+		// Removes the chosen user and updates the UI
+		userList.getItems().remove(currentlySelectedUser);
+		eventBus.dispatch(event);
+		logger.log(Level.INFO, "Added user " + currentlySelectedUser);
+	}
+
 	@FXML
 	private void backButtonClicked() { eventBus.dispatch(new BackEvent()); }
 }