implemented new feature name list on the client side.

Network/src/pis/client/LaunchClient.java

@@ -6,6 +6,7 @@
 import javafx.geometry.Pos;
 import javafx.scene.Scene;
 import javafx.scene.control.Button;
+import javafx.scene.control.Label;
 import javafx.scene.control.TextArea;
 import javafx.scene.control.TextField;
 import javafx.scene.layout.HBox;
@@ -34,11 +35,13 @@ public class LaunchClient extends Application implements ISend {
     private Button setNameButton;
     private TextField setNameField;
     private TextField messageField;
+    private TextField clientList;
     private boolean clientStarted;
     private Client client;
     private boolean isLoggedIn;
     private Pattern pattern;
     private Matcher matcher;
+    private Label nameListLabel;
 
     //just initialization of gui
     private void initFirstScene(){
@@ -84,6 +87,8 @@ private void initFirstScene(){
         this.stopButton.setOnAction(e -> {
             if(clientStarted) {
                 showTextOnGui(Constants.DISCONNECT + ":");
+                setNameField.clear();
+                clientList.clear();
             }else{
                 showTextOnGui("you are already disconnected!");
             }
@@ -99,15 +104,22 @@ private void initFirstScene(){
         this.setNameField.setEditable(true);
         this.setNameField.setPrefColumnCount(26);
 
+        this.clientList = new TextField("input your name");
+        this.clientList.setEditable(false);
+        this.clientList.setText("0 clients");
+        this.clientList.setPrefColumnCount(26);
+
         this.messageField = new TextField("input your message");
         this.messageField.setEditable(false);
         this.messageField.setDisable(true);
         this.messageField.setPrefColumnCount(26);
 
+        this.nameListLabel = new Label("are online.");
+
         this.firstLayout = new VBox();
         this.firstLayout.setAlignment(Pos.CENTER);
         this.firstLayout.setPadding(new Insets(10,25,25,25));
-        this.firstScene = new Scene(firstLayout, 500, 300, Color.BLACK);
+        this.firstScene = new Scene(firstLayout, 500, 400, Color.BLACK);
 
         this.firstTextArea = new TextArea();
         this.firstTextArea.setEditable(false);
@@ -129,7 +141,11 @@ private void initFirstScene(){
         HBox hBox4 = new HBox();
         hBox4.getChildren().addAll(stopButton, clearButton, exitButton);
         hBox4.setSpacing(50);
-        this.firstLayout.getChildren().addAll(hBox1, hBox2, hBox3, hBox4);
+        HBox hBox5 = new HBox();
+        hBox5.getChildren().addAll(clientList, nameListLabel);
+        hBox5.setSpacing(30);
+        hBox5.setPadding(new Insets(10,0,25, 0));
+        this.firstLayout.getChildren().addAll(hBox1, hBox5, hBox2, hBox3, hBox4);
     }
 
 
@@ -141,12 +157,11 @@ public void init() throws Exception {
     }
 
     @Override
-    public void start(Stage primaryStage) throws Exception {
+    public void start(Stage primaryStage) {
         this.primaryStage = primaryStage;
         primaryStage.setResizable(false);
         primaryStage.setTitle("Client");
 
-
         this.primaryStage.setScene(firstScene);
         this.primaryStage.show();
     }
@@ -166,6 +181,13 @@ public void showTextOnGui(String text){
             client.sendString(Constants.DISCONNECT + ":");
             changeButtonsState(false);
         }
+
+        if(isNamelist(text)){
+            this.clientList.setText("");
+            String msg = text.replace(":", " ");
+            msg = msg.replace("name list", "");
+            this.clientList.setText(msg);
+        }
         firstTextArea.appendText(text + "\n");
     }
 
@@ -202,5 +224,16 @@ private boolean isDisconnect(String msg){
         matcher = pattern.matcher(msg);
         return matcher.matches();
     }
+    private boolean isNamelist(String msg){
+        pattern = Pattern.compile("^name list: .+");
+        matcher = pattern.matcher(msg);
+        return matcher.matches();
+    }
+
+    private boolean isSomeDisconnected(String msg){
+        pattern = Pattern.compile("disconnected.$");
+        matcher = pattern.matcher(msg);
+        return matcher.matches();
+    }
     //=================REGEX for commands==================
 }

Network/src/pis/server/Connection.java

@@ -110,6 +110,11 @@ private void processInMessages(String msg) throws Exception{
             sendString("refused: see_how_to_use_chat");
             actionListener.log((!isLoggedIn() ? socket.getInetAddress() : clientName) + " wrong_command");
         }
+
+        /*if (receiveNameList(msg)) {
+            actionListener.log("TEST");
+            actionListener.receiveNames(this);
+        }*/
     }
     //connection proves whether this name exists or not
     private boolean nameExists(String val){
@@ -125,6 +130,12 @@ private boolean nameExists(String val){
         return false;
     }
     //================checking with regex===========================
+
+    private boolean receiveNameList(String val){
+        pattern = Pattern.compile("^receive_names:$");
+        matcher = pattern.matcher(val.replaceAll("connect: ", ""));
+        return matcher.matches();
+    }
     private boolean correctName(String val){
         pattern = Pattern.compile("^[a-zA-Z0-9_]{3,30}");
         matcher = pattern.matcher(val.replaceAll("connect: ", ""));

Network/src/pis/server/Server.java

@@ -56,7 +56,9 @@ public Server(IInterconnect gui){
                     Socket socket = serverSocket.accept();
                     //number of connections must be restricted
                     if (connections.size() < Constants.MAX_CLIENTS_SIZE) {
-                        connected(new Connection(socket, Server.this));
+                        Connection conn = new Connection(socket, Server.this);
+                        conn.sendString("name list: " + createNamesList());
+                        connected(conn);
                     } else {
                         Connection connection = new Connection(socket, Server.this);
                         connection.sendString("refused: too_many_users");
@@ -114,6 +116,7 @@ public synchronized void disconnectClient(Connection connection) {
             connections.remove(connection);
             log(getClientName(connection) + " disconnected.");
             sendOnAll(connection, getClientName(connection) + " disconnected.");
+            sendOnAll("name list: " + createNamesList());
         }
     }
 
@@ -123,10 +126,7 @@ public synchronized void receiveNames(Connection connection) {
         //send names on all users
         if(connection.isLoggedIn() && names.toString() != null){
             //making name list: [NAME]: {NAME} with simple manipulations
-            String val = names.toString();
-            val = val.replaceAll(",",":");
-            val = val.replaceAll("\\[","");
-            val = val.replaceAll("]","");
+            String val = createNamesList();
             //send names on all clients
             for(Connection var : connections){
                 if(var.getClientName() != null) {
@@ -137,6 +137,14 @@ public synchronized void receiveNames(Connection connection) {
         }
     }
 
+    private String createNamesList(){
+        String val = names.toString();
+        val = val.replaceAll(",",":");
+        val = val.replaceAll("\\[","");
+        val = val.replaceAll("]","");
+        return val;
+    }
+
     @Override
     public synchronized void log(String msg) {
         System.out.println(msg);
@@ -158,6 +166,11 @@ public void sendOnAll(Connection connection, String msg){
             }
         }
     }
+    private void sendOnAll(String msg){
+        for(Connection val : connections){
+            val.sendString(msg);
+        }
+    }
     //=============================GETTERS & SETTERS======================================
     /**
      * @param connection