first commit

.idea/encodings.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
+</project>
\ No newline at end of file

.idea/misc.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="11" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/project-lab11.iml" filepath="$PROJECT_DIR$/project-lab11.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

project-lab11.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

src/chatRoom/client/Main.java

+package chatRoom.client;
+import chatRoom.client.view.ChatRoomGUI;
+import chatRoom.client.view.UsernameFrame;
+
+public class Main {
+
+    public static void main(String[] args){
+
+//        ChatRoomGUI chat1 = new ChatRoomGUI();
+        UsernameFrame chat2 = new UsernameFrame();
+    }
+}

src/chatRoom/client/Network.java

+package chatRoom.client;
+import javax.sound.sampled.Port;
+import java.net.*;
+import java.io.*;
+import java.util.Formatter;
+import java.util.Scanner;
+
+public class Network {
+
+    public static void main(String [] args) {
+        String serverName = args[0];
+        int port = Integer.parseInt(args[1]);
+        try(Socket client = new Socket(serverName, port);
+            Scanner socketin = new Scanner(client.getInputStream());
+            Formatter socketOut = new Formatter(client.getOutputStream());)
+        {
+            String text;
+            socketOut.format(text);
+            socketOut.flush();
+        } catch (UnknownHostException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/chatRoom/client/model/Model.java

+package chatRoom.client.model;
+
+import chatRoom.client.view.NewMessageListener;
+
+

src/chatRoom/client/view/ChatRoomGUI.java

+package chatRoom.client.view;
+import javax.swing.*;
+import java.awt.*;
+
+public class ChatRoomGUI extends JFrame{
+    private final String WINDOWS_TITLE = "AUT Chat Room";
+    private final int WIDTH = 500, HEIGHT = 500;
+    private final int X = 100, Y = 100;
+    private chatArea chatBox;
+    private MessageArea messageArea;
+    private ParticipantsArea participantsArea;
+    private String userName;
+
+    public ChatRoomGUI() {
+        super();
+        this.setTitle(WINDOWS_TITLE);
+        this.setLayout(new BorderLayout());
+        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        this.setSize(WIDTH, HEIGHT);
+        this.setLocation(X, Y);
+
+        chatBox = new chatArea();
+        this.add(new JScrollPane(chatBox), BorderLayout.CENTER);
+
+        messageArea = new MessageArea(this);
+        this.add(messageArea,BorderLayout.SOUTH);
+
+        participantsArea = new ParticipantsArea();
+        this.add(new JScrollPane(participantsArea),BorderLayout.WEST);
+
+        this.setVisible(true);
+    }
+    public void addNewMessage(String pm) {
+        chatBox.addMessage(userName, pm);
+    }
+
+    public void resetMessageText() {
+        messageArea.reset();
+    }
+
+    public void addNewParticipant(String userName){
+        participantsArea.addNewParticipant(userName);
+        this.userName = userName;
+    }
+
+}
\ No newline at end of file

src/chatRoom/client/view/MessageArea.java

+package chatRoom.client.view;
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class MessageArea extends JPanel {
+    JTextField textField;
+    JButton btn;
+    ChatRoomGUI chatRoomGUI;
+
+
+    public MessageArea(ChatRoomGUI chatRoomGUI){
+        super();
+        this.chatRoomGUI = chatRoomGUI;
+        this.setLayout(new BorderLayout());
+        textField = new JTextField();
+        textField.setEditable(true);
+        add(textField, BorderLayout.CENTER);
+
+        btn = new JButton("send");
+        btn.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                doClickAction();
+            } });
+        add(btn, BorderLayout.EAST);
+        this.setVisible(true);
+    }
+    void reset() {
+        textField.setText("");
+    }
+
+
+    void doClickAction(){
+
+      chatRoomGUI.addNewMessage(textField.getText());
+      reset();
+    }
+}

src/chatRoom/client/view/NewMessageListener.java

+package chatRoom.client.view;
+
+public interface NewMessageListener {
+}

src/chatRoom/client/view/ParticipantsArea.java

+package chatRoom.client.view;
+import javax.swing.*;
+import java.awt.*;
+import javax.swing.JList;
+
+public class ParticipantsArea extends JPanel  {
+    DefaultListModel model;
+    JList userslist;
+
+    public ParticipantsArea(){
+
+        super();
+        JLabel label = new JLabel("online users");
+        add(label, BorderLayout.PAGE_START);
+        this.setLayout(new GridLayout(10,1));
+        model = new DefaultListModel();
+        userslist = new JList(model);
+        this.add(userslist,BorderLayout.CENTER);
+    }
+
+
+    public void addNewParticipant(String userName){
+        if(!model.contains(userName))
+        model.addElement(userName);
+//        System.out.println(model);
+
+    }
+    public void removeParticipant(String userName){
+        if(model.contains(userName))
+        model.removeElement(userName);
+    }
+}

src/chatRoom/client/view/UsernameFrame.java

+package chatRoom.client.view;
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public class UsernameFrame extends JFrame {
+    private static final String BTN_TXT = " Start Chatting ...";
+    private static final String LABEL_TXT = " Choose Your UserName  ";
+    private static final int WIDTH = 300, HEIGHT = 100;
+    private JTextField textField;
+    private JButton btn;
+
+    public UsernameFrame() throws HeadlessException {
+        super();
+        this.setLayout(new BorderLayout());
+        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        JLabel label = new JLabel(LABEL_TXT);
+        add(label, BorderLayout.PAGE_START);
+        textField = new JTextField();
+        add(textField, BorderLayout.CENTER);
+        btn = new JButton(BTN_TXT);
+
+        btn.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                doClickAction();
+            } });
+
+        add(btn, BorderLayout.PAGE_END);
+        setSize(WIDTH, HEIGHT);
+        setVisible(true);
+    }
+
+    public void doClickAction(){
+
+        ChatRoomGUI chat1 = new ChatRoomGUI();
+        chat1.addNewParticipant(textField.getText());
+        this.setVisible(false);
+    }
+
+
+}
\ No newline at end of file

src/chatRoom/client/view/chatArea.java

+package chatRoom.client.view;
+import javax.swing.*;
+
+public class chatArea extends JTextArea {
+
+    private static final int ROWS = 10, COLUMNS = 30;
+
+    public chatArea(){
+        super(ROWS,COLUMNS);
+        this.setEditable(false);
+        this.setLineWrap(true);
+        setVisible(true);
+    }
+    public void addMessage(String name, String pm){
+        String str = name+ ":" + pm + "\n";
+        append(str);
+    }
+
+}

src/chatRoom/server/ClientHandler.java

+package chatRoom.server;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.net.Socket;
+
+public class ClientHandler {
+    private Socket socket;
+    private DataOutputStream dataOutputStream;
+    private DataInputStream dataInputStream;
+    public ClientHandler(Socket client) throws Exception {
+        if (client == null)
+            throw new Exception("client can't be null");
+        this.socket = client;
+        dataOutputStream = new DataOutputStream(client.getOutputStream());
+        dataInputStream = new DataInputStream(client.getInputStream());
+        run();
+
+    }
+    private void handleIncomingMessages(String message){
+        System.out.println(message);
+
+    }
+
+        public void run() {
+            while(true){
+                try {
+                    String input = dataInputStream.readUTF();
+                    handleIncomingMessages(input);
+                }
+                catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+        }
+    }
\ No newline at end of file

src/chatRoom/server/Server.java

+package chatRoom.server;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.util.ArrayList;
+
+public class Server {
+
+    private static final int PORT = 4321;
+    private ServerSocket serverSocket;
+    ArrayList<Socket> users = new ArrayList<>();
+
+    public Server() throws IOException {
+        serverSocket = new ServerSocket(PORT);
+        while (true) {
+            Socket client = serverSocket.accept();
+            try {
+                ClientHandler clientHandler = new ClientHandler(client);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+
+        }
+    }
+
+}