UserManager is now a Singleton as well.

src/main/java/de/fabianonline/telegram_backup/CommandLineController.java

@@ -37,7 +37,6 @@ public class CommandLineController {
 	private static Logger logger = LoggerFactory.getLogger(CommandLineController.class);
 	private ApiStorage storage;
 	public TelegramApp app;
-	public UserManager user = null;
 	
 	public CommandLineController() {
 		logger.info("CommandLineController started. App version {}", Config.APP_APPVER);
@@ -76,8 +75,11 @@ public class CommandLineController {
 		TelegramClient client = Kotlogram.getDefaultClient(app, storage, Kotlogram.PROD_DC4, handler);
 		
 		try {
-			logger.info("Creating UserManager");
+			logger.info("Initializing UserManager");
-			user = new UserManager(client);
+			UserManager.init(client);
+			Database.init(client);
+			
+			UserManager user = UserManager.getInstance();
 
 			if (!CommandLineOptions.cmd_login && !user.isLoggedIn()) {
 				System.out.println("Your authorization data is invalid or missing. You will have to login with Telegram again.");
@@ -104,7 +106,7 @@ public class CommandLineController {
 			logger.debug("CommandLineOptions.val_export: {}", CommandLineOptions.val_export);
 			if (CommandLineOptions.val_export != null) {
 				if (CommandLineOptions.val_export.toLowerCase().equals("html")) {
-					(new HTMLExporter()).export(user);
+					(new HTMLExporter()).export();
 					System.exit(0);
 				} else {
 					show_error("Unknown export format.");
@@ -125,7 +127,7 @@ public class CommandLineController {
 			}
 			
 			logger.info("Initializing Download Manager");
-			DownloadManager d = new DownloadManager(user, client, new CommandLineDownloadProgress());
+			DownloadManager d = new DownloadManager(client, new CommandLineDownloadProgress());
 			logger.debug("Calling DownloadManager.downloadMessages with limit {}", CommandLineOptions.val_limit_messages);
 			d.downloadMessages(CommandLineOptions.val_limit_messages);
 			
@@ -141,7 +143,7 @@ public class CommandLineController {
 			logger.error("Exception caught!", e);
 		} finally {
 			if (CommandLineOptions.cmd_daemon) {
-				handler.setUser(user, client);
+				handler.activate();
 				System.out.println("DAEMON mode requested - keeping running.");
 			} else {
 				client.close();
@@ -209,6 +211,7 @@ public class CommandLineController {
 	}
 	
 	private void cmd_login(String phone) throws RpcErrorException, IOException {
+		UserManager user = UserManager.getInstance();
 		if (phone==null) {
 			System.out.println("Please enter your phone number in international format.");
 			System.out.println("Example: +4917077651234");

src/main/java/de/fabianonline/telegram_backup/Database.java

@@ -55,12 +55,8 @@ public class Database {
 	private final static Logger logger = LoggerFactory.getLogger(Database.class);
 	private static Database instance = null;
 	
-	public Database(UserManager user_manager, TelegramClient client) {
+	private Database(TelegramClient client) {
-		this(user_manager, client, true);
+		this.user_manager = UserManager.getInstance();
-	}
-	
-	public Database(UserManager user_manager, TelegramClient client, boolean update_db) {
-		this.user_manager = user_manager;
 		this.client = client;
 		System.out.println("Opening database...");
 		try {
@@ -80,15 +76,15 @@ public class Database {
 			CommandLineController.show_error("Could not connect to SQLITE database.");
 		}
 		
-		this.init(update_db);
+		// Run updates
-		instance = this;
+		DatabaseUpdates updates = new DatabaseUpdates(conn, this);
+		updates.doUpdates();
+		
 		System.out.println("Database is ready.");
 	}
 	
-	private void init(boolean update_db) {
+	public static void init(TelegramClient c) {
-		if (!update_db) return;
+		instance = new Database(c);
-		DatabaseUpdates updates = new DatabaseUpdates(conn, this);
-		updates.doUpdates();
 	}
 	
 	public static Database getInstance() {

src/main/java/de/fabianonline/telegram_backup/DownloadManager.java

@@ -60,11 +60,11 @@ public class DownloadManager {
 	static boolean last_download_succeeded = true;
 	static final Logger logger = LoggerFactory.getLogger(DownloadManager.class);
 	
-	public DownloadManager(UserManager u, TelegramClient c, DownloadProgressInterface p) {
+	public DownloadManager(TelegramClient c, DownloadProgressInterface p) {
-		this.user = u;
+		this.user = UserManager.getInstance();
 		this.client = c;
 		this.prog = p;
-		this.db = new Database(u, c);
+		this.db = Database.getInstance();
 	}
 	
 	public void downloadMessages(Integer limit) throws RpcErrorException, IOException {

src/main/java/de/fabianonline/telegram_backup/TelegramUpdateHandler.java

@@ -32,7 +32,7 @@ class TelegramUpdateHandler implements UpdateCallback {
 	private Database db = null;
 	public boolean debug = false;
 	
-	public void setUser(UserManager user, TelegramClient client) { this.user = user; this.db = new Database(user, client, false);}
+	public void activate() { this.user = UserManager.getInstance(); this.db = Database.getInstance();}
 	
 	public void onUpdates(TelegramClient c, TLUpdates u) {
 		if (db==null) return;

src/main/java/de/fabianonline/telegram_backup/TestFeatures.java

@@ -58,7 +58,7 @@ class TestFeatures {
 		// Prints system.encoding and default charset
 		System.out.println("Default Charset:   " + Charset.defaultCharset());
 		System.out.println("file.encoding:     " + System.getProperty("file.encoding"));
-		Database db = new Database(user, client, false);
+		Database db = Database.getInstance();
 		System.out.println("Database encoding: " + db.getEncoding());
 	}
 }

src/main/java/de/fabianonline/telegram_backup/UserManager.java

@@ -43,8 +43,13 @@ public class UserManager {
 	private TLAuthorization auth = null;
 	private boolean password_needed = false;
 	private static Logger logger = LoggerFactory.getLogger(UserManager.class);
+	private static UserManager instance = null;
 	
-	public UserManager(TelegramClient c) throws IOException {
+	public static void init(TelegramClient c) throws IOException {
+		instance = new UserManager(c);
+	}
+	
+	private UserManager(TelegramClient c) throws IOException {
 		this.client = c;
 		logger.debug("Calling getFullUser");
 		try {
@@ -56,6 +61,11 @@ public class UserManager {
 		}
 	}
 	
+	public static UserManager getInstance() {
+		if (instance==null) throw new RuntimeException("UserManager is not yet initialized.");
+		return instance;
+	}
+	
 	public boolean isLoggedIn() { return user!=null; }
 	
 	public void sendCodeToPhoneNumber(String number) throws RpcErrorException, IOException {

src/main/java/de/fabianonline/telegram_backup/exporter/HTMLExporter.java

@@ -45,9 +45,10 @@ import org.slf4j.LoggerFactory;
 public class HTMLExporter {
 	private static Logger logger = LoggerFactory.getLogger(HTMLExporter.class);
 	
-	public void export(UserManager user) throws IOException {
+	public void export() throws IOException {
 		try {
-			Database db = new Database(user, null);
+			UserManager user = UserManager.getInstance();
+			Database db = Database.getInstance();
 			
 			// Create base dir
 			logger.debug("Creating base dir");