Färdig JavaFX chat app med tester

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

@@ -1,22 +1,27 @@
 package com.example;
 
 import javafx.fxml.FXML;
-import javafx.scene.control.Label;
+import javafx.scene.control.TextArea;
+import javafx.scene.control.TextField;
 
-/**
- * Controller layer: mediates between the view (FXML) and the model.
- */
 public class HelloController {
+    @FXML private TextArea chatArea;
+    @FXML private TextField inputField;
 
-    private final HelloModel model = new HelloModel();
+    private HelloModel model;
 
     @FXML
-    private Label messageLabel;
+    public void initialize() {
+        model = new HelloModel("javafx-chat"); // Du kan byta topic-namnet
+        model.listen(msg -> chatArea.appendText(msg + "\n"));
+    }
 
     @FXML
-    private void initialize() {
-        if (messageLabel != null) {
-            messageLabel.setText(model.getGreeting());
+    public void onSendButtonClick() {
+        String text = inputField.getText().trim();
+        if (!text.isEmpty()) {
+            model.sendMessage(text);
+            inputField.clear();
         }
     }
 }

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

@@ -2,24 +2,20 @@
 
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;
-import javafx.scene.Parent;
 import javafx.scene.Scene;
 import javafx.stage.Stage;
 
 public class HelloFX extends Application {
-
     @Override
     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);
-        stage.setTitle("Hello MVC");
+        Scene scene = new Scene(fxmlLoader.load());
+        stage.setTitle("JavaFX Chat App 💬");
         stage.setScene(scene);
         stage.show();
     }
 
     public static void main(String[] args) {
         launch();
     }
-
-}
+}

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

@@ -1,15 +1,52 @@
 package com.example;
 
-/**
- * Model layer: encapsulates application data and business logic.
- */
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.concurrent.CompletableFuture;
+
 public class HelloModel {
-    /**
-     * Returns a greeting based on the current Java and JavaFX versions.
-     */
-    public String getGreeting() {
-        String javaVersion = System.getProperty("java.version");
-        String javafxVersion = System.getProperty("javafx.version");
-        return "Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".";
+    private final HttpClient client = HttpClient.newHttpClient();
+    private final String topic;
+    private final String backendUrl;
+
+    public HelloModel(String topic) {
+        this.topic = topic;
+        this.backendUrl = System.getenv("BACKEND_URL");
+        if (backendUrl == null) {
+            throw new IllegalStateException("BACKEND_URL is not set!");
+        }
+    }
+
+    public void sendMessage(String message) {
+        String json = "{\"message\": \"" + message + "\"}";
+        String url = backendUrl + "/" + topic;
+
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(url))
+                .header("Content-Type", "application/json")
+                .POST(HttpRequest.BodyPublishers.ofString(json))
+                .build();
+
+        client.sendAsync(request, HttpResponse.BodyHandlers.ofString());
+    }
+
+    public CompletableFuture<Void> listen(MessageHandler handler) {
+        String url = backendUrl + "/" + topic + "/json";
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(url))
+                .build();
+
+        return client.sendAsync(request, HttpResponse.BodyHandlers.ofLines())
+                .thenAccept(response -> response.body().forEach(line -> {
+                    if (line.contains("\"message\"")) {
+                        handler.onMessage(line);
+                    }
+                }));
+    }
+
+    public interface MessageHandler {
+        void onMessage(String message);
     }
 }

src/main/java/module-info.java

@@ -1,7 +1,8 @@
 module hellofx {
     requires javafx.controls;
     requires javafx.fxml;
+    requires java.net.http;
 
     opens com.example to javafx.fxml;
     exports com.example;
-}
+}

src/main/resources/com/example/hello-view.fxml

@@ -1,9 +1,26 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<?import javafx.scene.layout.StackPane?>
-<?import javafx.scene.control.Label?>
+<?import javafx.scene.control.*?>
+<?import javafx.scene.layout.*?>
+<?import javafx.geometry.Insets?>
 
-<StackPane xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml" fx:controller="com.example.HelloController">
-    <children>
-        <Label fx:id="messageLabel" text="Hello, JavaFX!" />
-    </children>
-</StackPane>
+<BorderPane xmlns:fx="http://javafx.com/fxml"
+            fx:controller="com.example.HelloController">
+
+    <center>
+        <TextArea fx:id="chatArea"
+                  editable="false"
+                  prefHeight="400"
+                  prefWidth="600"/>
+    </center>
+
+    <bottom>
+        <!-- ✅ Rätt sätt att skriva padding i JavaFX 25 -->
+        <HBox spacing="10">
+            <padding>
+                <Insets top="10" right="10" bottom="10" left="10"/>
+            </padding>
+            <TextField fx:id="inputField" HBox.hgrow="ALWAYS"/>
+            <Button text="Send" onAction="#onSendButtonClick"/>
+        </HBox>
+    </bottom>
+</BorderPane>

src/test/java/com/example/HelloModelTest.java

@@ -0,0 +1,38 @@
+package com.example;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
+
+public class HelloModelTest {
+
+    @Test
+    void testModelInitialization() {
+        // Försök skapa modellen, hantera fel ifall BACKEND_URL saknas
+        try {
+            HelloModel model = new HelloModel("test-topic");
+            assertNotNull(model, "Model should be created successfully");
+        } catch (IllegalStateException e) {
+            // Om miljövariabeln saknas ska felet ha rätt meddelande
+            assertTrue(e.getMessage().contains("BACKEND_URL"), "Exception should mention BACKEND_URL");
+        }
+    }
+
+    @Test
+    void testBackendUrlDefault() {
+        // Testar att miljövariabeln hanteras
+        String backendUrl = System.getenv("BACKEND_URL");
+        if (backendUrl == null || backendUrl.isBlank()) {
+            backendUrl = "https://ntfy.sh";
+        }
+        assertTrue(backendUrl.startsWith("https://"), "BACKEND_URL should start with https://");
+    }
+
+    @Test
+    void testSendMessageFormatting() {
+        String userMessage = "Hej världen!";
+        String formatted = "{\"message\": \"" + userMessage + "\"}";
+        assertTrue(formatted.contains("Hej världen!"));
+        assertTrue(formatted.contains("{"));
+        assertTrue(formatted.contains("}"));
+    }
+}