Renamed ChatSynchronizer to LocalDB, added user-specific files

src/main/java/envoy/client/Config.java

@@ -1,5 +1,6 @@
 package envoy.client;
 
+import java.io.File;
 import java.util.Properties;
 
 /**
@@ -14,25 +15,28 @@ public class Config {
 
 	private String	server;
 	private int		port;
+	private File	localDB;
 
 	/**
-	 * Defaults to the {@code server.properties} file for information.
+	 * Defaults to the {@code client.properties} file for information.
 	 * 
-	 * 
-	 * @param properties - The two options for internet connection <strong> server</strong> and <strong> port</strong>
-	 * @since Envoy 0.1
+	 * @param properties a {@link Properties} object containing information about
+	 *                   the server and port, as well as the path to the local
+	 *                   database
+	 * @since Envoy v0.1-alpha
 	 */
 	public void load(Properties properties) {
 		if (properties.containsKey("server")) server = properties.getProperty("server");
 		if (properties.containsKey("port")) port = Integer.parseInt(properties.getProperty("port"));
+		localDB = new File(properties.getProperty("localDB", ".\\localDB"));
 	}
 
 	/**
-	 * Sets the server and the port via command line properties --server/ -s and --port/ -p.
+	 * Sets the server, port and localDB path via command line properties --server /
+	 * -s, --port / -p and --localDB / -db.
 	 * 
-	 * @param args {@code --server} or {@code -s} followed by the specified URL
-	 * 		   and {@code --port} or {@code -p} followed by a 4-digit Integer 
-	 * @since Envoy 0.1
+	 * @param args the command line arguments to parse
+	 * @since Envoy v0.1-alpha
 	 */
 	public void load(String[] args) {
 		for (int i = 0; i < args.length; i++)
@@ -45,10 +49,13 @@ public class Config {
 				case "-p":
 					port = Integer.parseInt(args[++i]);
 					break;
+				case "--localDB":
+				case "-db":
+					localDB = new File(args[++i]);
 			}
 	}
 
-	public boolean isInitialized() { return server != null && !server.isEmpty() && port > 0; }
+	public boolean isInitialized() { return server != null && !server.isEmpty() && port > 0 && port < 65566 && localDB != null; }
 
 	public String getServer() { return server; }
 
@@ -57,4 +64,8 @@ public class Config {
 	public int getPort() { return port; }
 
 	public void setPort(int port) { this.port = port; }
+
+	public File getLocalDB() { return localDB; }
+
+	public void setLocalDB(File localDB) { this.localDB = localDB; }
 }

src/main/java/envoy/client/LocalDB.java

@@ -9,38 +9,54 @@ import java.io.ObjectOutputStream;
 import java.util.ArrayList;
 import java.util.List;
 
+import envoy.exception.EnvoyException;
+import envoy.schema.User;
+
 /**
  * Project: <strong>envoy-client</strong><br>
- * File: <strong>ChatSynchronizer.java</strong><br>
+ * File: <strong>LocalDB.java</strong><br>
  * Created: <strong>27.10.2019</strong><br>
  *
  * @author Kai S. K. Engelbart
  * @since Envoy v0.1-alpha
  */
-public class ChatSynchronizer {
+public class LocalDB {
 
 	private File		localDB;
+	private User		sender;
 	private List<Chat>	chats	= new ArrayList<>();
 
-	public ChatSynchronizer(String localDBPath) {
-		localDB = new File(localDBPath);
-		if (localDB.exists() && !localDB.isDirectory()) loadFromLocalDB();
+	public LocalDB(User sender) { this.sender = sender; }
+
+	public void initializeDBFile(File localDBDir) throws EnvoyException {
+		if (localDBDir.exists() && !localDBDir.isDirectory())
+			throw new EnvoyException(String.format("LocalDBDir '%s' is not a directory!", localDBDir.getAbsolutePath()));
+		localDB = new File(localDBDir, sender.getID() + ".db");
+		if (localDB.exists()) loadFromLocalDB();
 	}
 
 	public void saveToLocalDB() {
+		try {
+			localDB.getParentFile().mkdirs();
+			localDB.createNewFile();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
 		try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(localDB))) {
 			out.writeObject(chats);
-		} catch(IOException ex) {
+		} catch (IOException ex) {
 			ex.printStackTrace();
 		}
 	}
-	
+
 	@SuppressWarnings("unchecked")
-	private void loadFromLocalDB() {
+	private void loadFromLocalDB() throws EnvoyException {
 		try (ObjectInputStream in = new ObjectInputStream(new FileInputStream(localDB))) {
 			Object obj = in.readObject();
 			if (obj instanceof ArrayList<?>) chats = (ArrayList<Chat>) obj;
-		} catch (ClassNotFoundException | IOException e) {}
+		} catch (ClassNotFoundException | IOException e) {
+			throw new EnvoyException(e);
+		}
 	}
 
 	public List<Chat> getChats() { return chats; }

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

@@ -24,8 +24,8 @@ import javax.swing.Timer;
 import javax.swing.border.EmptyBorder;
 
 import envoy.client.Chat;
-import envoy.client.ChatSynchronizer;
 import envoy.client.Client;
+import envoy.client.LocalDB;
 import envoy.schema.Message;
 import envoy.schema.Messages;
 import envoy.schema.User;
@@ -48,14 +48,14 @@ public class ChatWindow extends JFrame {
 	private JPanel contentPane = new JPanel();
 
 	private Client				client;
-	private ChatSynchronizer	chatSynchronizer;
+	private LocalDB	localDB;
 
 	private JList<User>	userList	= new JList<>();
 	private Chat		currentChat;
 
-	public ChatWindow(Client client, ChatSynchronizer chatSynchronizer) {
+	public ChatWindow(Client client, LocalDB localDB) {
 		this.client				= client;
-		this.chatSynchronizer	= chatSynchronizer;
+		this.localDB	= localDB;
 
 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 		setBounds(100, 100, 600, 800);
@@ -67,7 +67,7 @@ public class ChatWindow extends JFrame {
 
 			@Override
 			public void windowClosing(WindowEvent e) {
-				chatSynchronizer.saveToLocalDB();
+				localDB.saveToLocalDB();
 			}
 		});
 		
@@ -204,7 +204,7 @@ public class ChatWindow extends JFrame {
 				final User			user				= selectedUserList.getSelectedValue();
 				client.setRecipient(user);
 
-				currentChat = chatSynchronizer.getChats()
+				currentChat = localDB.getChats()
 					.stream()
 					.filter(chat -> chat.getRecipient().getID() == user.getID())
 					.findFirst()
@@ -253,10 +253,10 @@ public class ChatWindow extends JFrame {
 				userListModel.addElement(user);
 
 				// Check if user exists in local DB
-				if (chatSynchronizer.getChats()
+				if (localDB.getChats()
 					.stream()
 					.filter(c -> c.getRecipient().getID() == user.getID())
-					.count() == 0) chatSynchronizer.getChats().add(new Chat(user));
+					.count() == 0) localDB.getChats().add(new Chat(user));
 			});
 			SwingUtilities.invokeLater(() -> userList.setModel(userListModel));
 		}).start();
@@ -272,11 +272,11 @@ public class ChatWindow extends JFrame {
 		new Timer(timeout, (evt) -> {
 			Messages unreadMessages = client.getUnreadMessages(client.getSender().getID());
 			for (int i = 0; i < unreadMessages.getMessage().size(); i++)
-				for (int j = 0; j < chatSynchronizer.getChats().size(); j++)
-					if (chatSynchronizer.getChats().get(j)
+				for (int j = 0; j < localDB.getChats().size(); j++)
+					if (localDB.getChats().get(j)
 						.getRecipient()
 						.getID() == unreadMessages.getMessage().get(i).getMetaData().getSender())
-						chatSynchronizer.getChats().get(j).appendMessage(unreadMessages.getMessage().get(i));
+						localDB.getChats().get(j).appendMessage(unreadMessages.getMessage().get(i));
 		}).start();
 	}
 }

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

@@ -6,9 +6,10 @@ import java.util.Properties;
 
 import javax.swing.JOptionPane;
 
-import envoy.client.ChatSynchronizer;
 import envoy.client.Client;
 import envoy.client.Config;
+import envoy.client.LocalDB;
+import envoy.exception.EnvoyException;
 
 /**
  * Starts the Envoy client and prompts the user to enter their name.
@@ -31,7 +32,7 @@ public class Startup {
 			ClassLoader loader = Thread.currentThread().getContextClassLoader();
 			try {
 				Properties configProperties = new Properties();
-				configProperties.load(loader.getResourceAsStream("server.properties"));
+				configProperties.load(loader.getResourceAsStream("client.properties"));
 				config.load(configProperties);
 			} catch (IOException e) {
 				e.printStackTrace();
@@ -48,11 +49,21 @@ public class Startup {
 			System.err.println("User name is not set or empty. Exiting...");
 			System.exit(1);
 		}
-		Client client = new Client(config, userName);
+		Client	client	= new Client(config, userName);
+		LocalDB	localDB	= new LocalDB(client.getSender());
+		try {
+			localDB.initializeDBFile(config.getLocalDB());
+		} catch (EnvoyException e) {
+			e.printStackTrace();
+			JOptionPane.showMessageDialog(null,
+					"Error while loading local database: " + e.toString() + "\nChats will not be stored locally.",
+					"Local DB error",
+					JOptionPane.WARNING_MESSAGE);
+		}
 
 		EventQueue.invokeLater(() -> {
 			try {
-				ChatWindow frame = new ChatWindow(client, new ChatSynchronizer("local_chats.db"));
+				ChatWindow frame = new ChatWindow(client, localDB);
 				frame.setVisible(true);
 			} catch (Exception e) {
 				e.printStackTrace();

src/main/resources/client.properties

@@ -0,0 +1,3 @@
+server=http://kske.feste-ip.net
+port=43315
+localDB=.\\localDB

src/main/resources/server.properties

@@ -1,2 +0,0 @@
-server=http://kske.feste-ip.net
-port=43315