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Merge pull request #34 from ithsjava25/dev
Implementation of JavaFX Chat App with ntfy integration: ## Requirements - **Java** - **Version**: `25` - **Maven Compiler Plugin** - **Version**: `3.11.0` - **Configuration**: - **Release**: `25` ## Usage 1. Set `JAVA_HOME` to JDK 25. 2. Create a **.env** file with the required variables. You can also clone and fill **.env.example** and rename it to `.env`. 2. Start with: ```bash ./mvnw clean javafx:run
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‎.env.example‎

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NTFY_BASE_URL=https://ntfy.sh
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NTFY_TOPIC= //Add your topic here

‎.gitignore‎

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target/
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/.idea/
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.env

‎README.md‎

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@@ -11,8 +11,20 @@ A JavaFX-based chat client using [ntfy](https://docs.ntfy.sh/) for backend messa
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- Unit tests for `Model` class
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- (Advanced) Send files via "Attach local file" option
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## 🚀 Run Instructions
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1. Set `JAVA_HOME` to JDK 25
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## Requirements
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- **Java**
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- **Version**: `25`
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- **Maven Compiler Plugin**
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- **Version**: `3.11.0`
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- **Configuration**:
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- **Release**: `25`
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## Usage
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1. Set `JAVA_HOME` to JDK 25.
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2. Create a **.env** file with the required variables. You can also clone and fill **.env.example** and rename it to `.env`.
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2. Start with:
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```bash
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./mvnw clean javafx:run

‎pom.xml‎

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<javafx.version>25</javafx.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-api</artifactId>
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<version>2.0.9</version>
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</dependency>
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<dependency>
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<groupId>org.slf4j</groupId>
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<artifactId>slf4j-simple</artifactId>
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<version>2.0.9</version>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.core</groupId>
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<artifactId>jackson-databind</artifactId>
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<version>2.17.2</version>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter</artifactId>
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<artifactId>javafx-fxml</artifactId>
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<version>${javafx.version}</version>
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</dependency>
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<dependency>
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<groupId>org.testfx</groupId>
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<artifactId>testfx-junit5</artifactId>
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<version>4.0.17</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.openjfx</groupId>
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<artifactId>javafx-swing</artifactId>
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<version>${javafx.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<noManPages>true</noManPages>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.11.0</version>
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<configuration>
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<release>25</release>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎src/main/java/com/example/HelloController.java‎

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package com.example;
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import com.example.client.ChatNetworkClient;
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import com.example.domain.ChatModel;
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import com.example.domain.NtfyEventResponse;
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import com.example.domain.NtfyMessage;
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import javafx.animation.KeyFrame;
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import javafx.animation.Timeline;
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import javafx.event.ActionEvent;
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import javafx.fxml.FXML;
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import javafx.scene.control.*;
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import javafx.scene.control.Label;
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import javafx.scene.control.TextField;
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import javafx.scene.image.Image;
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import javafx.scene.image.ImageView;
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import javafx.scene.layout.VBox;
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import javafx.stage.FileChooser;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* Controller layer: mediates between the view (FXML) and the model.
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*/
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public class HelloController {
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import java.awt.*;
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import java.io.File;
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import java.io.IOException;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.time.Instant;
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import java.time.LocalTime;
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import java.time.ZoneId;
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import java.util.Arrays;
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import java.util.List;
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import java.util.UUID;
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private final HelloModel model = new HelloModel();
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public class HelloController {
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private static final Logger log = LoggerFactory.getLogger(HelloController.class);
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private ChatNetworkClient client;
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private String baseUrl;
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private String topic;
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private File selectedFile = null;
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@FXML
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private Label messageLabel;
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@FXML
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private void initialize() {
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if (messageLabel != null) {
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messageLabel.setText(model.getGreeting());
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private ListView<NtfyEventResponse> messagesList;
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@FXML
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private TextField messageInput;
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@FXML
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private TextField titleInput;
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@FXML
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private TextField tagsInput;
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public void setClient(ChatNetworkClient client, String baseUrl, String topic) {
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this.client = client;
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this.baseUrl = baseUrl;
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this.topic = topic;
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}
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public void setModel(ChatModel model) {
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messagesList.setItems(model.getMessages());
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messagesList.setCellFactory(list -> new MessageCell());
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}
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private static String formatTime(long epochSeconds) {
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Instant instant = Instant.ofEpochSecond(epochSeconds);
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LocalTime time = LocalTime.ofInstant(instant, ZoneId.systemDefault());
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return time.toString();
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}
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private void showStatus(String text) {
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messageLabel.setText(text);
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Timeline t = new Timeline(new KeyFrame(javafx.util.Duration.seconds(3),
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ev -> messageLabel.setText("")));
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t.setCycleCount(1);
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t.play();
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}
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@FXML
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private void onPickAttachment() {
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FileChooser chooser = new FileChooser();
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chooser.setTitle("Select attachment");
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File file = chooser.showOpenDialog(messageInput.getScene().getWindow());
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if (file != null) {
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selectedFile = file;
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messageLabel.setText("Attachment selected: " + file.getName());
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}
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}
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@FXML
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private void onSend() {
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String txt = messageInput.getText();
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if ((txt == null || txt.isBlank()) && selectedFile == null) {
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showStatus("Nothing to send");
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return;
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}
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String title = titleInput.getText();
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if (title != null && title.isBlank()) title = null;
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String tagsRaw = tagsInput.getText();
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List<String> tags = null;
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if (tagsRaw != null && !tagsRaw.isBlank()) {
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tags = java.util.Arrays.stream(tagsRaw.split(","))
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.map(String::trim)
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.filter(s -> !s.isEmpty())
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.toList();
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}
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NtfyMessage msg = new NtfyMessage.Builder()
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.id(UUID.randomUUID().toString())
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.time(System.currentTimeMillis())
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.event("message")
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.topic(topic)
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.message(txt)
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.title(title)
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.tags(tags)
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.attach(null)
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.filename(null)
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.build();
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try {
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client.send(baseUrl, msg, selectedFile);
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showStatus(selectedFile == null ? "Message sent" : "Attachment sent");
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} catch (InterruptedException | IOException e) {
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showStatus("Error sending: " + e.getMessage());
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}
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messageInput.clear();
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titleInput.clear();
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tagsInput.clear();
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selectedFile = null;
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}
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private static final class MessageCell extends ListCell<NtfyEventResponse> {
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@Override
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protected void updateItem(NtfyEventResponse msg, boolean empty) {
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super.updateItem(msg, empty);
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if (empty || msg == null) {
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setText(null);
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setGraphic(null);
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return;
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}
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setText(null);
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VBox container = new VBox();
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container.setSpacing(6);
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container.getStyleClass().add("message-bubble");
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container.setStyle("-fx-alignment: CENTER_LEFT;");
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if (msg.title() != null) {
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Label titleLabel = new Label(msg.title());
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titleLabel.getStyleClass().add("message-title");
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container.getChildren().add(titleLabel);
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}
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if (msg.attachment() != null) {
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NtfyEventResponse.Attachment att = msg.attachment();
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if (att.type() != null && att.type().startsWith("image")) {
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Image image = new Image(att.url(), 300, 0, true, true);
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ImageView imageView = new ImageView(image);
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container.getChildren().add(imageView);
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} else {
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Label fileLabel = getFileLabel(att);
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container.getChildren().add(fileLabel);
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}
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}
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if (msg.message() != null && !msg.message().isBlank()) {
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Label messageLabel = new Label(msg.message());
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messageLabel.setWrapText(true);
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messageLabel.getStyleClass().add("message-text");
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container.getChildren().add(messageLabel);
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}
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if (msg.tags() != null && !msg.tags().isEmpty()) {
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Label tagsLabel = new Label(String.join(", ", msg.tags()));
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tagsLabel.getStyleClass().add("message-tags");
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container.getChildren().add(tagsLabel);
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}
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if (msg.time() != null) {
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Label timeLabel = new Label(formatTime(msg.time()));
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timeLabel.getStyleClass().add("message-time");
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container.getChildren().add(timeLabel);
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}
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setGraphic(container);
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}
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// Helper method to allow user to open file
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private static Label getFileLabel(NtfyEventResponse.Attachment att) {
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Label fileLabel = new Label("Open file: " + (att.name() != null ? att.name() : att.url()));
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fileLabel.setStyle("-fx-text-fill: #2c75ff; -fx-underline: true;");
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fileLabel.setOnMouseClicked(ev -> {
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try {
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String url = att.url();
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// method that works on linux as Desktop is not always supported and crashes application
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if (System.getProperty("os.name").toLowerCase().contains("linux")) {
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try {
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new ProcessBuilder("xdg-open", url).start();
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return;
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}catch (IOException e) {
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log.error("Error opening file: {}", url, e);
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}
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}
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if (Desktop.isDesktopSupported()) {
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Desktop.getDesktop().browse(new URI(url));
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}
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} catch (IOException | URISyntaxException ex) {
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log.error("Failed to open attachment: {}", ex.getMessage());
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log.error(Arrays.toString(ex.getStackTrace()));
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}
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});
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return fileLabel;
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}
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}
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}

‎src/main/java/com/example/HelloFX.java‎

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package com.example;
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import com.example.client.ChatNetworkClient;
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import com.example.client.NtfyHttpClient;
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import com.example.domain.ChatModel;
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import com.example.domain.NtfyMessage;
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import javafx.application.Application;
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import javafx.fxml.FXMLLoader;
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import javafx.scene.Parent;
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import javafx.scene.Scene;
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import javafx.stage.Stage;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.util.Objects;
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import java.util.Properties;
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import static com.example.utils.EnvLoader.loadEnv;
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920
public class HelloFX extends Application {
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private static final Logger log = LoggerFactory.getLogger("MAIN");
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static final ChatModel model = new ChatModel();
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1124
@Override
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public void start(Stage stage) throws Exception {
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FXMLLoader fxmlLoader = new FXMLLoader(HelloFX.class.getResource("hello-view.fxml"));
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Parent root = fxmlLoader.load();
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Scene scene = new Scene(root, 640, 480);
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stage.setTitle("Hello MVC");
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Properties env = loadEnv();
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String baseUrl = env.getProperty("NTFY_BASE_URL", "https://ntfy.sh");
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String topic = env.getProperty("NTFY_TOPIC");
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if (topic == null || topic.isBlank()) {
31+
throw new IllegalStateException("NTFY_TOPIC is not set");
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}
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FXMLLoader loader = new FXMLLoader(HelloFX.class.getResource("hello-view.fxml"));
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Parent root = loader.load();
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HelloController controller = loader.getController();
38+
controller.setModel(model);
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ChatNetworkClient client = new NtfyHttpClient(model);
41+
controller.setClient(client, baseUrl, topic);
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client.subscribe(baseUrl, topic);
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Scene scene = new Scene(root);
46+
scene.getStylesheets().add(
47+
Objects.requireNonNull(HelloFX.class.getResource("styles.css")).toExternalForm()
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);
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1750
stage.setScene(scene);
1851
stage.show();
1952
}
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2154
public static void main(String[] args) {
22-
launch();
55+
launch(args);
56+
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}
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}

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