Fix offline mode and local DB initialization

src/main/java/envoy/client/data/PersistentLocalDB.java

@@ -40,18 +40,18 @@ public class PersistentLocalDB extends LocalDB {
 	 * Constructs an empty local database. To serialize any chats to the file
 	 * system, call {@link PersistentLocalDB#initializeUserStorage()}.
 	 *
-	 * @param localDbDir the directory in which to store users and chats
+	 * @param localDBDir the directory in which to store users and chats
 	 * @throws IOException if the PersistentLocalDB could not be initialized
 	 * @since Envoy Client v0.1-alpha
 	 */
-	public PersistentLocalDB(File localDbDir) throws IOException {
-		localDBDir = localDbDir;
+	public PersistentLocalDB(File localDBDir) throws IOException {
+		this.localDBDir = localDBDir;
 
 		// Initialize local database directory
-		if (localDbDir.exists() && !localDbDir.isDirectory())
-			throw new IOException(String.format("LocalDbDir '%s' is not a directory!", localDbDir.getAbsolutePath()));
-		usersFile		= new File(localDbDir, "users.db");
-		idGeneratorFile	= new File(localDbDir, "id_generator.db");
+		if (localDBDir.exists() && !localDBDir.isDirectory())
+			throw new IOException(String.format("LocalDbDir '%s' is not a directory!", localDBDir.getAbsolutePath()));
+		usersFile		= new File(localDBDir, "users.db");
+		idGeneratorFile	= new File(localDBDir, "id_generator.db");
 	}
 
 	/**

src/main/java/envoy/client/net/Client.java

@@ -223,6 +223,7 @@ public class Client implements Closeable {
 		checkOnline();
 		Map<String, Contact> users = new HashMap<>();
 		contacts.forEach(u -> users.put(u.getName(), u));
+		users.put(sender.getName(), sender);
 		return users;
 	}
 

src/main/java/envoy/client/ui/LoginDialog.java

@@ -72,12 +72,15 @@ public final class LoginDialog extends Dialog<Void> {
 		this.localDB				= localDB;
 		this.receivedMessageCache	= receivedMessageCache;
 
+		// Prepare handshake
+		localDB.loadIDGenerator();
+
 		final var loader = new FXMLLoader(getClass().getResource("/fxml/LoginDialog.fxml"));
 		loader.setController(this);
 		final var dialogPane = loader.<DialogPane>load();
 
 		((Stage) getDialogPane().getScene().getWindow()).getIcons().add(IconUtil.load("/icons/envoy_logo.png"));
-		
+
 		// Configure dialog buttons
 		dialogPane.getButtonTypes().addAll(ButtonType.CLOSE, ButtonType.OK);
 
@@ -138,22 +141,18 @@ public final class LoginDialog extends Dialog<Void> {
 				Platform.runLater(this::hide);
 			}
 		} catch (IOException | InterruptedException | TimeoutException e) {
-			logger.warning("Could not connect to server. Trying offline mode...");
-			e.printStackTrace();
+			logger.warning("Could not connect to server: " + e);
+			logger.finer("Attempting offline mode...");
 			try {
 				// Try entering offline mode
 				localDB.loadUsers();
 				User clientUser = (User) localDB.getUsers().get(credentials.getIdentifier());
 				if (clientUser == null) throw new EnvoyException("Could not enter offline mode: user name unknown");
 				client.setSender(clientUser);
-				Platform.runLater(() -> {
-					new Alert(AlertType.WARNING, "A connection to the server could not be established. Starting in offline mode.\n"
-							+ e)
-						.showAndWait();
-					hide();
-				});
+				new Alert(AlertType.WARNING, "A connection to the server could not be established. Starting in offline mode.\n" + e).showAndWait();
+				hide();
 			} catch (Exception e1) {
-				Platform.runLater(() -> new Alert(AlertType.ERROR, "Client error: " + e.toString()).showAndWait());
+				new Alert(AlertType.ERROR, "Client error: " + e).showAndWait();
 				System.exit(1);
 			}
 		}

src/main/java/envoy/client/ui/Startup.java

@@ -115,7 +115,7 @@ public final class Startup extends Application {
 			localDB.getUsers()
 				.values()
 				.stream()
-				.filter(u -> u instanceof User && u != localDB.getUser())
+				.filter(User.class::isInstance)
 				.map(User.class::cast)
 				.forEach(u -> u.setStatus(UserStatus.OFFLINE));