diff --git a/src/main/java/com/university/chat/Client/ServerListener.java b/src/main/java/com/university/chat/Client/ServerListener.java index b609d74..bc54708 100644 --- a/src/main/java/com/university/chat/Client/ServerListener.java +++ b/src/main/java/com/university/chat/Client/ServerListener.java @@ -1,18 +1,27 @@ package com.university.chat.Client; +import com.university.chat.Common.ChatMessage; +import com.university.chat.Common.FileMessage; + +import java.io.ObjectInputStream; + public class ServerListener implements Runnable{ - // TODO: store the ObjectInputStream from the user socket - // (this should be the same input stream the - // chatClient created when connecting) + private final ObjectInputStream in; + + public ServerListener(ObjectInputStream in) { + this.in = in; + } @Override public void run() { try { - // TODO: In an infinite loop read objects from the server - // - if it's a ChatMessage -> print ": " - // - if it's a FileMessage -> print that a file was received - // (filename + sender), it's already - // saved to disk by the server. + while(true){ + Object recived = in.readObject(); + if(recived instanceof ChatMessage msg) + System.out.println(msg.getSender() + "==> " + msg.getContent()); + else if(recived instanceof FileMessage fileMsg) + System.out.println(fileMsg.getSender() + "sent ==> " +fileMsg.getFilename()); + } } catch (Exception e){ System.out.println("Disconnected from server"); } diff --git a/src/main/java/com/university/chat/Client/chatClient.java b/src/main/java/com/university/chat/Client/chatClient.java index dae0bad..ae8b833 100644 --- a/src/main/java/com/university/chat/Client/chatClient.java +++ b/src/main/java/com/university/chat/Client/chatClient.java @@ -1,29 +1,108 @@ package com.university.chat.Client; -public class chatClient { - public static void main() { - // TODO: Connecting to the server - // 1. Create a socket and connect to the server - // 2. Create an ObjectOutputStream (out) and ObjectInputStream (in) - // from the socket's streams — output FIRST, then input. - // 2. Get the username, and send a LOGIN ChatMessage with that username - // 3. Start a new Thread running a ServerListener(in) so incoming - // messages are handled concurrently. +import com.university.chat.Common.ChatMessage; +import com.university.chat.Common.FileMessage; +import com.university.chat.Common.MessageType; - while (true){ - try { - // TODO: Program loop — read a line from the console and act on it: - // - "/msg " -> build & send a PRIVATE_MESSAGE - // - "/users" -> build & send a USER_LIST request - // - "/sendfile " -> read the file into a byte[] - // (you can use TransferProgress - // to show progress) - // and send it as a FileMessage - // - anything else -> send a PUBLIC_MESSAGE - // Remember to flush() the output stream after writeObject(). - } catch (Exception e){ - System.out.println("command failed: " + e.getMessage()); +import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; +import java.net.Socket; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.util.Scanner; + +public class chatClient { + + public static void main() { + + final String SERVER_HOST = "localhost"; + final int SERVER_PORT = 600; + + Scanner input = new Scanner(System.in); + + try { + Socket clientSocket = new Socket(SERVER_HOST, SERVER_PORT); + + ObjectOutputStream output = new ObjectOutputStream(clientSocket.getOutputStream()); + output.flush(); + ObjectInputStream inputStream = new ObjectInputStream(clientSocket.getInputStream()); + + System.out.print("Username: "); + String username = input.nextLine(); + + output.writeObject(new ChatMessage(MessageType.LOGIN, username, null, null)); + output.flush(); + + Thread serverThread = new Thread(new ServerListener(inputStream)); + serverThread.start(); + + while (true) { + try { + String command = input.nextLine(); + + if (command.startsWith("/msg ")) { + String[] args = command.substring(5).split(" ", 2); + + String recipient = args[0]; + String message = args.length > 1 ? args[1] : ""; + + output.writeObject(new ChatMessage( + MessageType.PRIVATE_MESSAGE, + username, + recipient, + message)); + + output.flush(); + continue; + } + + if (command.equals("/users")) { + output.writeObject(new ChatMessage( + MessageType.USER_LIST, + username, + null, + null)); + + output.flush(); + continue; + } + + if (command.startsWith("/sendfile ")) { + String[] args = command.substring(10).split(" ", 2); + + String recipient = args[0]; + Path file = Paths.get(args[1]); + + byte[] fileData = Files.readAllBytes(file); + String fileName = file.getFileName().toString(); + + output.writeObject(new FileMessage( + username, + recipient, + fileName, + fileData)); + + output.flush(); + continue; + } + + output.writeObject(new ChatMessage( + MessageType.PUBLIC_MESSAGE, + username, + null, + command)); + + output.flush(); + + } catch (Exception ex) { + System.out.println("Command failed: " + ex.getMessage()); + } } + + } catch (IOException ex) { + System.out.println(ex.getMessage()); } } -} +} \ No newline at end of file diff --git a/src/main/java/com/university/chat/Server/ChatServer.java b/src/main/java/com/university/chat/Server/ChatServer.java index b2a35ae..0dce357 100644 --- a/src/main/java/com/university/chat/Server/ChatServer.java +++ b/src/main/java/com/university/chat/Server/ChatServer.java @@ -1,15 +1,28 @@ package com.university.chat.Server; +import java.io.IOException; +import java.net.ServerSocket; +import java.net.Socket; + public class ChatServer { - // TODO: declare a single shared UserManager instance (static final) - // This MUST be shared by all ClientSession threads so that - // broadcasting and private messaging work correctly. + public static final UserManager userManager = new UserManager(); + public static ServerSocket serverSocket; public static void main(String[] args) { - // TODO: Create a ServerSocket - - // TODO: In an infinite loop: - // accept an incoming client connection - // make a new thread running ClientSession for each user. + try { + serverSocket = new ServerSocket(600); + } catch (IOException e){ + throw new RuntimeException(e); + } + while(true){ + try { + Socket socket = serverSocket.accept(); + System.out.println("New user connected."); + ClientSession session = new ClientSession(socket, userManager); + new Thread(session).start(); + } catch(IOException e){ + System.err.println("Cannot connect: " + e.getMessage()); + } + } } } diff --git a/src/main/java/com/university/chat/Server/ClientSession.java b/src/main/java/com/university/chat/Server/ClientSession.java index f09d64a..1f66a14 100644 --- a/src/main/java/com/university/chat/Server/ClientSession.java +++ b/src/main/java/com/university/chat/Server/ClientSession.java @@ -2,44 +2,80 @@ package com.university.chat.Server; import com.university.chat.Common.ChatMessage; import com.university.chat.Common.FileMessage; +import com.university.chat.Common.MessageType; import java.io.IOException; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; import java.net.Socket; import java.nio.file.Files; public class ClientSession implements Runnable { private String username; + private final UserManager userManager; + private final Socket socket; + private ObjectOutputStream out; + private ObjectInputStream in; public ClientSession(Socket socket, UserManager userManager) { - // TODO : Create an ObjectOutputStream from socket.getOutputStream() - // and an ObjectInputStream from socket.getInputStream(). + this.socket = socket; + this.userManager = userManager; + try { + out = new ObjectOutputStream(socket.getOutputStream()); + } catch (IOException e) { + System.out.println(e.getMessage()); + } + + try { + in = new ObjectInputStream(socket.getInputStream()); + } catch (IOException e) { + System.out.println(e.getMessage()); + } } @Override public void run() { try { + System.out.println("Welcome"); + boolean isLogedIn = false; + Object firstObject = in.readObject(); + if(firstObject instanceof ChatMessage){ + isLogedIn = ((ChatMessage)firstObject).getType() == MessageType.LOGIN; + } - // TODO: Welcome the user (login step) - // 1. Read the first object sent by the client. - // 2. Check it's a ChatMessage with type LOGIN. - // 3. Extract the username. - // 4. Try to register the user via userManager.addUser(...). - // 5. If the username is taken, send back LOGIN_FAILED and close the socket. - // 6. Otherwise, create the user's folders with FileManager.createUserFolders(...) - // and send back LOGIN_SUCCESS. + if(!isLogedIn){ + socket.close(); + return; + } - // TODO: Main message loop - // In a loop, call in.readObject(), you can separate messages by their type: - // - if it's a ChatMessage -> call handleChatMessage(msg) - // - if it's a FileMessage -> call handleFileMessage(fileMsg) - // Keep looping until the connection is closed (an exception will be thrown). + username = ((ChatMessage) firstObject).getSender(); + if(userManager.addUser(username, this)){ + System.out.println(username + " user name added."); + FileManager.createUserFolders(username); + out.writeObject(MessageType.LOGIN_SUCCESS); + out.flush(); + } + else{ + System.out.println("try another username."); + out.writeObject(MessageType.LOGIN_FAILED); + out.flush(); + socket.close(); + return; + } + + while(true){ + Object obj = in.readObject(); + if(obj instanceof ChatMessage) + handleChatMessage((ChatMessage) obj); + else if(obj instanceof FileMessage) + handleFileMessage((FileMessage) obj); + } } catch (Exception e) { System.out.println("Disconnected: " + username); } finally { - // TODO: Remove the user from UserManager so they no longer - // receive broadcasts or appear in users list + userManager.removeUser(username); } } @@ -47,13 +83,32 @@ public class ClientSession implements Runnable { private void handleChatMessage(ChatMessage msg) throws IOException { switch (msg.getType()) { case PUBLIC_MESSAGE -> { - // TODO: Broadcast this message to every connected client. + Iterable users = userManager.getAllSessions(); + for(ClientSession user : users){ + user.send(msg); + } } case PRIVATE_MESSAGE -> { - // TODO: Forward this message to the receiver user. + ClientSession receiver = userManager.getUser(msg.getReceiver()); + if(receiver != null){ + receiver.send(msg); + } + else{ + send(new ChatMessage( + MessageType.PRIVATE_MESSAGE, + "server", + username, + "User doesn't exist: " + msg.getReceiver() + )); + } } case USER_LIST -> { - // TODO: Reply to the requester with the list of online users. + send(new ChatMessage( + MessageType.USER_LIST, + "server", + username, + userManager.listUsers() + )); } } } @@ -66,6 +121,11 @@ public class ClientSession implements Runnable { Files.write(sentPath, fileMsg.getData()); Files.write(recvPath, fileMsg.getData()); - // TODO: Forward the received file-message to the destination user. + ClientSession receiver = userManager.getUser(fileMsg.getReceiver()); + receiver.send(fileMsg); + } + private synchronized void send(Object obj) throws IOException{ + out.writeObject(obj); + out.flush(); } } \ No newline at end of file