Model

.gitignore

@@ -1,2 +1,3 @@
 target/
 /.idea/
+.env

pom.xml

@@ -45,6 +45,22 @@
             <artifactId>javafx-fxml</artifactId>
             <version>${javafx.version}</version>
         </dependency>
+        <dependency>
+            <groupId>io.github.cdimascio</groupId>
+            <artifactId>dotenv-java</artifactId>
+            <version>3.2.0</version>
+        </dependency>
+        <dependency>
+            <groupId>tools.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>3.0.1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.wiremock</groupId>
+            <artifactId>wiremock</artifactId>
+            <version>4.0.0-beta.15</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
     <build>
         <plugins>
@@ -55,7 +71,7 @@
                 <configuration>
                     <mainClass>com.example.HelloFX</mainClass>
                     <options>
-                    <option>--enable-native-access=javafx.graphics</option>
+                        <option>--enable-native-access=javafx.graphics</option>
                     </options>
                     <launcher>javafx</launcher>
                     <stripDebug>true</stripDebug>
@@ -65,4 +81,4 @@
             </plugin>
         </plugins>
     </build>
-</project>
+</project>

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

@@ -1,22 +1,71 @@
 package com.example;
 
+import javafx.application.Platform;
+import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
-import javafx.scene.control.Label;
+import javafx.scene.control.*;
+import javafx.scene.control.ListCell;
+
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.format.DateTimeFormatter;
 
-/**
- * Controller layer: mediates between the view (FXML) and the model.
- */
 public class HelloController {
 
-    private final HelloModel model = new HelloModel();
+    private final HelloModel model = new HelloModel(new NtfyConnectionImpl());
 
     @FXML
     private Label messageLabel;
 
+    @FXML
+    private ListView<NtfyMessageDto> messageView;
+
+    @FXML
+    private TextArea messageInput;
+
+    // Formatter för tid
+    private final DateTimeFormatter timeFormatter =
+            DateTimeFormatter.ofPattern("HH:mm:ss")
+                    .withZone(ZoneId.systemDefault());
+
     @FXML
     private void initialize() {
-        if (messageLabel != null) {
-            messageLabel.setText(model.getGreeting());
-        }
+        // Visa hälsning
+        messageLabel.setText(model.getGreeting());
+
+        // Koppla ListView till modellens meddelanden
+        messageView.setItems(model.getMessages());
+
+        // Bind TextArea till modellens property
+        messageInput.textProperty().bindBidirectional(model.messageToSendProperty());
+
+        // Snyggare visning av meddelanden
+        messageView.setCellFactory(lv -> new ListCell<>() {
+            @Override
+            protected void updateItem(NtfyMessageDto msg, boolean empty) {
+                super.updateItem(msg, empty);
+                if (empty || msg == null) {
+                    setText(null);
+                } else {
+                    setText("[" + timeFormatter.format(Instant.ofEpochMilli(msg.time())) + "] "
+                            + msg.message());
+                }
+            }
+        });
+
+        // Scrolla automatiskt ner till senaste meddelandet
+        model.getMessages().addListener((javafx.collections.ListChangeListener<NtfyMessageDto>) change -> {
+            Platform.runLater(() -> {
+                if (!messageView.getItems().isEmpty()) {
+                    messageView.scrollTo(messageView.getItems().size() - 1);
+                }
+            });
+        });
+    }
+
+    @FXML
+    private void sendMessage(ActionEvent actionEvent) {
+        model.sendMessage();
+        messageInput.clear();
     }
 }

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

@@ -12,7 +12,7 @@ public class HelloFX extends Application {
     public void start(Stage stage) throws Exception {
         FXMLLoader fxmlLoader = new FXMLLoader(HelloFX.class.getResource("hello-view.fxml"));
         Parent root = fxmlLoader.load();
-        Scene scene = new Scene(root, 640, 480);
+        Scene scene = new Scene(root, 1280, 480);
         stage.setTitle("Hello MVC");
         stage.setScene(scene);
         stage.show();

src/main/java/com/example/HelloModel.java

@@ -1,15 +1,74 @@
 package com.example;
 
-/**
- * Model layer: encapsulates application data and business logic.
- */
+import javafx.application.Platform;
+import javafx.beans.property.SimpleStringProperty;
+import javafx.beans.property.StringProperty;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import java.util.function.Consumer;
+
 public class HelloModel {
-    /**
-     * Returns a greeting based on the current Java and JavaFX versions.
-     */
+
+    private final NtfyConnection connection;
+    private final ObservableList<NtfyMessageDto> messages = FXCollections.observableArrayList();
+    private final StringProperty messageToSend = new SimpleStringProperty();
+
+    public HelloModel(NtfyConnection connection) {
+        this.connection = connection;
+        receiveMessage();
+    }
+
+    public ObservableList<NtfyMessageDto> getMessages() {
+        return messages;
+    }
+
+    public String getMessageToSend() {
+        return messageToSend.get();
+    }
+
+    public StringProperty messageToSendProperty() {
+        return messageToSend;
+    }
+
+    public void setMessageToSend(String message) {
+        messageToSend.set(message);
+    }
+
     public String getGreeting() {
         String javaVersion = System.getProperty("java.version");
         String javafxVersion = System.getProperty("javafx.version");
-        return "Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".";
+        return "Welcome to ChatApp, made in JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".";
+    }
+
+    public void sendMessage() {
+        String msg = messageToSend.get();
+        if (msg == null || msg.isBlank()) {
+            return;
+        }
+        connection.send(msg);
+    }
+
+    public void sendMessageAsync(Consumer<Boolean> callback) {
+        String msg = messageToSend.get();
+        if (msg == null || msg.isBlank()) {
+            callback.accept(false);
+            return;
+        }
+
+        try {
+            boolean success = connection.send(msg);
+            callback.accept(success);
+        } catch (Exception e) {
+            callback.accept(false);
+        }
+    }
+
+    private void receiveMessage() {
+        connection.receive(message -> {
+            if (message == null || message.message() == null || message.message().isBlank()) {
+                return;
+            }
+            Platform.runLater(() -> messages.add(message));
+        });
     }
-}
+}

src/main/java/com/example/ManyParameters.java

@@ -0,0 +1,19 @@
+package com.example;
+
+public class ManyParameters {
+
+    public ManyParameters(String computerName, int timeout,
+                          String method, int size, byte[] data) {
+
+    }
+
+
+    static void main() {
+        ManyParametersBuilder builder = new ManyParametersBuilder();
+        builder
+                .setComputerName("localhost")   //Fluent API
+                .setTimeout(10)
+                .setSize(0)
+                .createManyParameters();
+    }
+}

src/main/java/com/example/ManyParametersBuilder.java

@@ -0,0 +1,38 @@
+package com.example;
+
+public class ManyParametersBuilder {
+    private String computerName;
+    private int timeout = 0;
+    private String method;
+    private int size = 0;
+    private byte[] data = null;
+
+    public ManyParametersBuilder setComputerName(String computerName) {
+        this.computerName = computerName;
+        return this;
+    }
+
+    public ManyParametersBuilder setTimeout(int timeout) {
+        this.timeout = timeout;
+        return this;
+    }
+
+    public ManyParametersBuilder setMethod(String method) {
+        this.method = method;
+        return this;
+    }
+
+    public ManyParametersBuilder setSize(int size) {
+        this.size = size;
+        return this;
+    }
+
+    public ManyParametersBuilder setData(byte[] data) {
+        this.data = data;
+        return this;
+    }
+
+    public ManyParameters createManyParameters() {
+        return new ManyParameters(computerName, timeout, method, size, data);
+    }
+}

src/main/java/com/example/NtfyConnection.java

@@ -0,0 +1,11 @@
+package com.example;
+
+import java.util.function.Consumer;
+
+public interface NtfyConnection {
+
+    public boolean send(String message);
+
+    public void receive(Consumer<NtfyMessageDto> messageHandler);
+
+}

src/main/java/com/example/NtfyConnectionImpl.java

@@ -0,0 +1,62 @@
+package com.example;
+
+import io.github.cdimascio.dotenv.Dotenv;
+import tools.jackson.databind.ObjectMapper;
+
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.Objects;
+import java.util.function.Consumer;
+
+public class NtfyConnectionImpl implements NtfyConnection {
+
+    private final HttpClient http = HttpClient.newHttpClient();
+    private final String hostName;
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    public NtfyConnectionImpl() {
+        Dotenv dotenv = Dotenv.load();
+        hostName = Objects.requireNonNull(dotenv.get("HOST_NAME"));
+    }
+
+    public NtfyConnectionImpl(String hostName) {
+        this.hostName = hostName;
+    }
+
+    @Override
+    public boolean send(String message) {
+        HttpRequest httpRequest = HttpRequest.newBuilder()
+                .POST(HttpRequest.BodyPublishers.ofString(message))
+                .header("Cache", "no")
+                .uri(URI.create(hostName + "/mytopic"))
+                .build();
+        try {
+            //Todo: handle long blocking send requests to not freeze the JavaFX thread
+            //1. Use thread send message?
+            //2. Use async?
+            var reponse = http.send(httpRequest, HttpResponse.BodyHandlers.discarding());
+            return true;
+        } catch (IOException e) {
+            System.out.println("Error sending message");
+        } catch (InterruptedException e) {
+            System.out.println("Interruped sending message");
+        }
+        return false;
+    }
+
+    @Override
+    public void receive(Consumer<NtfyMessageDto> messageHandler) {
+        HttpRequest httpRequest = HttpRequest.newBuilder()
+                .GET()
+                .uri(URI.create(hostName + "/mytopic/json"))
+                .build();
+
+        http.sendAsync(httpRequest, HttpResponse.BodyHandlers.ofLines())
+                .thenAccept(response -> response.body()
+                        .map(s -> mapper.readValue(s, NtfyMessageDto.class))
+                        .forEach(messageHandler));
+    }
+}

src/main/java/com/example/NtfyMessageDto.java

@@ -0,0 +1,7 @@
+package com.example;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record NtfyMessageDto(String id, long time, String event, String topic, String message) {
+}

src/main/java/com/example/Singelton.java

@@ -0,0 +1,14 @@
+package com.example;
+
+public class Singelton {
+
+    private final static Singelton instance = new Singelton();
+
+    private Singelton(){
+
+    }
+
+    public static Singelton getInstance(){
+        return instance;
+    }
+}

src/main/java/module-info.java

@@ -1,6 +1,9 @@
 module hellofx {
     requires javafx.controls;
     requires javafx.fxml;
+    requires tools.jackson.databind;
+    requires io.github.cdimascio.dotenv.java;
+    requires java.net.http;
 
     opens com.example to javafx.fxml;
     exports com.example;