src/main/java/com/university/chat/Client/UI/ChatController.java

@@ -0,0 +1,337 @@
+package com.university.chat.Client.UI;
+
+import com.university.chat.Client.Net.chatClient;
+import com.university.chat.Client.TransferProgress;
+import com.university.chat.Common.ChatMessage;
+import com.university.chat.Common.FileMessage;
+import javafx.application.Platform;
+import javafx.fxml.FXML;
+import javafx.geometry.Insets;
+import javafx.scene.control.*;
+import javafx.scene.layout.*;
+import javafx.stage.FileChooser;
+import javafx.stage.Stage;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.util.*;
+
+public class ChatController {
+
+    @FXML
+    private ListView<String> usersList;
+
+    @FXML
+    private TextArea publicChatArea;
+
+    @FXML
+    private AnchorPane chatAnchor;
+
+    @FXML
+    private TextField messageField;
+
+    @FXML
+    private BorderPane titleBar;
+
+    private double xOffset = 0;
+    private double yOffset = 0;
+
+    private chatClient client;
+    private String selectedUser = null;
+
+    private final Map<String, BorderPane> privateChatViews = new HashMap<>();
+    private final Map<String, TextArea> privateTextAreas = new HashMap<>();
+    private final Map<String, TextField> privateInputFields = new HashMap<>();
+
+    @FXML
+    private VBox fileTransferBox;
+
+    @FXML
+    private Label fileTransferLabel;
+
+    @FXML
+    private ProgressBar fileTransferProgress;
+
+
+    @FXML
+    private void initialize() {
+
+        titleBar.setOnMousePressed(event -> {
+            xOffset = event.getSceneX();
+            yOffset = event.getSceneY();
+        });
+
+        titleBar.setOnMouseDragged(event -> {
+            Stage stage = (Stage) titleBar.getScene().getWindow();
+            stage.setX(event.getScreenX() - xOffset);
+            stage.setY(event.getScreenY() - yOffset);
+        });
+
+        usersList.getSelectionModel().selectedItemProperty().addListener((obs, oldVal, newVal) -> {
+
+            if (newVal == null || newVal.isBlank()) {
+                selectedUser = null;
+                chatAnchor.getChildren().clear();
+                return;
+            }
+
+            String clickedUser = newVal.trim();
+
+            if (client != null && clickedUser.equals(client.getUsername())) {
+                selectedUser = null;
+                chatAnchor.getChildren().clear();
+                return;
+            }
+
+            selectedUser = clickedUser;
+            openPrivateChat(clickedUser);
+        });
+    }
+
+    public void setClient(chatClient client) {
+
+        this.client = client;
+
+        if (client.getServerListener() != null) {
+            client.getServerListener().setOnMessageReceived(this::handleIncomingMessage);
+        }
+
+        try {
+            client.requestUserList();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public void handleIncomingMessage(Object obj) {
+
+        if (obj instanceof ChatMessage msg) {
+
+            switch (msg.getType()) {
+
+                case USER_LIST -> {
+                    String content = msg.getContent();
+                    if (content != null) {
+
+                        List<String> users = Arrays.stream(content.split(","))
+                                .map(String::trim)
+                                .filter(u -> !u.isEmpty())
+                                .toList();
+
+                        updateUsersList(users);
+                    }
+                }
+
+                case PUBLIC_MESSAGE -> Platform.runLater(() ->
+                        publicChatArea.appendText(msg.getSender() + ": " + msg.getContent() + "\n"));
+
+                case PRIVATE_MESSAGE -> Platform.runLater(() ->
+                        appendPrivateMessage(msg.getSender(),
+                                msg.getSender() + ": " + msg.getContent()));
+
+
+            }
+        }
+        else if (obj instanceof FileMessage msg) {
+
+              Platform.runLater(() -> {
+
+                FileChooser chooser = new FileChooser();
+                chooser.setInitialFileName(msg.getFilename());
+
+                File file = chooser.showSaveDialog(usersList.getScene().getWindow());
+
+                if(file != null){
+                    try {
+                        Files.write(file.toPath(), msg.getData());
+                    } catch (IOException e) {
+                        throw new RuntimeException(e);
+                    }
+                }
+
+            });
+        }
+    }
+
+    public void updateUsersList(List<String> users) {
+        Platform.runLater(() ->
+                usersList.getItems().setAll(users));
+    }
+
+    @FXML
+    public void sendPublicMessage() {
+
+        String text = messageField.getText();
+
+        if (text == null || text.trim().isEmpty()) return;
+
+        text = text.trim();
+
+        try {
+
+            client.sendPublicMessage(text);
+            publicChatArea.appendText("Me: " + text + "\n");
+            messageField.clear();
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+
+    private void sendPrivateMessage(String receiver) {
+
+        TextField inputField = privateInputFields.get(receiver);
+        TextArea chatArea = privateTextAreas.get(receiver);
+
+        if (inputField == null || chatArea == null) return;
+
+        String text = inputField.getText();
+
+        if (text == null || text.trim().isEmpty()) return;
+
+        text = text.trim();
+
+        try {
+
+            client.sendPrivateMessage(receiver, text);
+            chatArea.appendText("Me: " + text + "\n");
+            inputField.clear();
+
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @FXML
+    private void sendFile() {
+
+        FileChooser fileChooser = new FileChooser();
+        fileChooser.setTitle("Select file to send");
+
+        Stage stage = (Stage) usersList.getScene().getWindow();
+        File file = fileChooser.showOpenDialog(stage);
+
+        if (file == null) return;
+
+        try {
+
+            updateFileTransfer(file.length());
+            client.sendFile(selectedUser,file);
+            publicChatArea.appendText("Me sent file: " + file.getName() + "\n");
+        }
+        catch (Exception e){
+            e.printStackTrace();
+        }
+    }
+
+
+    private void openPrivateChat(String user) {
+
+        BorderPane chatView = privateChatViews.get(user);
+
+        if (chatView == null) {
+            chatView = createPrivateChatView(user);
+            privateChatViews.put(user, chatView);
+        }
+
+        chatAnchor.getChildren().setAll(chatView);
+
+        AnchorPane.setTopAnchor(chatView, 0.0);
+        AnchorPane.setBottomAnchor(chatView, 0.0);
+        AnchorPane.setLeftAnchor(chatView, 0.0);
+        AnchorPane.setRightAnchor(chatView, 0.0);
+    }
+
+    private BorderPane createPrivateChatView(String user) {
+
+        TextArea chatArea = new TextArea();
+        chatArea.setEditable(false);
+        chatArea.setWrapText(true);
+
+        TextField inputField = new TextField();
+        inputField.setPromptText("Message to " + user);
+
+        Button sendButton = new Button("Send");
+
+        sendButton.setOnAction(e -> sendPrivateMessage(user));
+        inputField.setOnAction(e -> sendPrivateMessage(user));
+
+        HBox bottom = new HBox(8, inputField, sendButton);
+        bottom.setPadding(new Insets(8));
+        inputField.setPrefWidth(300);
+
+        BorderPane root = new BorderPane();
+        root.setCenter(chatArea);
+        root.setBottom(bottom);
+
+        privateTextAreas.put(user, chatArea);
+        privateInputFields.put(user, inputField);
+
+        return root;
+    }
+
+
+    private void appendPrivateMessage(String user, String line) {
+
+        BorderPane view = privateChatViews.get(user);
+
+        if (view == null) {
+            view = createPrivateChatView(user);
+            privateChatViews.put(user, view);
+        }
+
+        TextArea area = privateTextAreas.get(user);
+
+        if (area != null) {
+            area.appendText(line + "\n");
+        }
+    }
+
+
+    public void showFileTransfer(String fileName) {
+        Platform.runLater(() -> {
+            fileTransferBox.setVisible(true);
+            fileTransferBox.setManaged(true);
+            fileTransferProgress.setProgress(0);
+            fileTransferLabel.setText("Sending " + fileName + "...");
+        });
+    }
+
+    public void updateFileTransfer(long length) {
+        Platform.runLater(() -> {
+
+            fileTransferProgress.setProgress(length);
+            fileTransferLabel.setText(String.format(
+                    "Sending... %d",
+                    (int) (length * 100)
+            ));
+        });
+    }
+
+    public void finishFileTransfer(String fileName) {
+        Platform.runLater(() -> {
+            fileTransferProgress.setProgress(1.0);
+            fileTransferLabel.setText(fileName + " sent successfully");
+        });
+    }
+
+
+    @FXML
+    private void closeApp() {
+        System.exit(0);
+    }
+
+    @FXML
+    private void minimize() {
+        Stage stage = (Stage) usersList.getScene().getWindow();
+        stage.setIconified(true);
+    }
+
+    @FXML
+    private void maximize() {
+        Stage stage = (Stage) usersList.getScene().getWindow();
+        stage.setMaximized(!stage.isMaximized());
+    }
+}

src/main/resources/chat_style.css

@@ -0,0 +1,77 @@
+.root {
+    -fx-font-family: "Segoe UI", "Helvetica", sans-serif;
+    -fx-background-color: #1e1e2f;
+}
+
+.title-bar {
+    -fx-background-color: #262638;
+    -fx-padding: 5 10 5 10;
+    -fx-alignment: CENTER_LEFT;
+}
+
+.title-text {
+    -fx-text-fill: #a0a0c0;
+    -fx-font-size: 13px;
+    -fx-font-weight: bold;
+}
+
+.title-button {
+    -fx-background-color: transparent;
+    -fx-text-fill: white;
+    -fx-font-size: 14px;
+    -fx-cursor: hand;
+}
+
+.title-button:hover {
+    -fx-background-color: #3b3b55;
+}
+
+.title-button-close:hover {
+    -fx-background-color: #e81123;
+}
+
+
+.label {
+    -fx-text-fill: #d1d1e0;
+ }
+
+.text-field {
+    -fx-background-color: #2a2a3d;
+    -fx-text-fill: white;
+    -fx-background-radius: 6;
+    -fx-border-color: #3c3c55;
+    -fx-padding: 8;
+}
+
+.button {
+    -fx-background-color: #4da3ff;
+    -fx-text-fill: white;
+    -fx-background-radius: 6;
+    -fx-cursor: hand;
+    -fx-padding: 6 15 6 15;
+}
+
+.button:hover {
+    -fx-background-color: #61afff;
+}
+
+.list-view, .text-area {
+    -fx-background-color: #262638;
+    -fx-control-inner-background: #262638;
+    -fx-text-fill: white;
+}
+
+
+.attach-button{
+    -fx-font-size:16px;
+    -fx-background-color: transparent;
+}
+
+.attach-button:hover{
+    -fx-background-color:#3b3b55;
+}
+
+
+.content-wrapper {
+    -fx-padding: 20;
+}

src/main/resources/com/university/chat/Client/UI/chat.fxml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<?import javafx.scene.layout.*?>
+<?import javafx.scene.control.*?>
+
+<BorderPane xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml"
+            fx:controller="com.university.chat.Client.UI.ChatController">
+
+    <top>
+        <BorderPane fx:id="titleBar" styleClass="title-bar">
+            <center><Label text="UniChat" styleClass="title-text"/></center>
+            <right>
+                <HBox>
+                    <Button text="—" styleClass="title-button" onAction="#minimize"/>
+                    <Button text="□" styleClass="title-button" onAction="#maximize"/>
+                    <Button text="✕" styleClass="title-button, title-button-close" onAction="#closeApp"/>
+                </HBox>
+            </right>
+        </BorderPane>
+    </top>
+
+    <center>
+
+        <HBox styleClass="content-wrapper" spacing="20">
+            <VBox spacing="10" prefWidth="200">
+                <Label text="Online Users"/>
+                <ListView fx:id="usersList" VBox.vgrow="ALWAYS"/>
+            </VBox>
+
+            <VBox spacing="10" HBox.hgrow="ALWAYS">
+                <Label text="Private Chat"/>
+                <AnchorPane fx:id="chatAnchor" style="-fx-background-color: #262638; -fx-background-radius: 8;" VBox.vgrow="ALWAYS"/>
+            </VBox>
+
+            <VBox spacing="10" prefWidth="250">
+                <Label text="Public Chat"/>
+                <TextArea fx:id="publicChatArea" editable="false" VBox.vgrow="ALWAYS"/>
+
+                <VBox fx:id="fileTransferBox" spacing="4" visible="false" managed="false">
+                    <Label fx:id="fileTransferLabel" text="Sending file..."/>
+                    <ProgressBar fx:id="fileTransferProgress" progress="0.0" prefWidth="260"/>
+                </VBox>
+
+                <HBox spacing="6">
+                    <Button text="📎" onAction="#sendFile"/>
+                    <TextField fx:id="messageField" HBox.hgrow="ALWAYS" promptText="Message..."/>
+                    <Button text="Send" onAction="#sendPublicMessage"/>
+                </HBox>
+
+            </VBox>
+        </HBox>
+    </center>
+</BorderPane>