Tests added

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

@@ -1,22 +1,63 @@
 package com.example;
 
 import javafx.fxml.FXML;
-import javafx.scene.control.Label;
+import javafx.scene.control.Button;
+import javafx.scene.control.ListView;
+import javafx.scene.control.TextField;
+import javafx.application.Platform;
 
-/**
- * Controller layer: mediates between the view (FXML) and the model.
- */
 public class HelloController {
 
+    // Kopplas till FXML-filen
+    @FXML private TextField inputField;
+    @FXML private Button sendBtn;
+    @FXML private ListView<String> messages;
+
+    // Skapar modellen som sköter nätverksdelen (skicka/ta emot)
     private final HelloModel model = new HelloModel();
 
+    // Körs automatiskt när appen startar
     @FXML
-    private Label messageLabel;
+    public void initialize() {
+        // Starttext när programmet öppnas
+        messages.getItems().add("Ansluten till: " + model.info());
+        messages.getItems().add("Skriv ett meddelande och tryck Skicka!");
 
-    @FXML
-    private void initialize() {
-        if (messageLabel != null) {
-            messageLabel.setText(model.getGreeting());
+        // Börja lyssna efter inkommande meddelanden
+        startListeningToMessages();
+
+        // När man trycker på Skicka-knappen
+        sendBtn.setOnAction(_ -> sendMessage());
+    }
+
+    // Skickar ett meddelande till chatten
+    private void sendMessage() {
+        String text = inputField.getText();
+
+        if (text == null || text.isBlank()) {
+            return; // Skicka inte tomt meddelande
         }
+
+        // Visa direkt i listan
+        messages.getItems().add("Jag: " + text);
+
+        // Skicka till servern
+        model.sendMessage(text);
+
+        // Töm textfältet
+        inputField.clear();
+    }
+
+    // Lyssnar efter nya meddelanden i bakgrunden
+    private void startListeningToMessages() {
+        model.startListening(
+            // När ett nytt meddelande kommer
+            msg -> Platform.runLater(() ->messages.getItems().add("Inkommande: " + msg)
+            ),
+
+            //Om ett fel inträffar
+            err -> Platform.runLater(() ->messages.getItems().add("Fel: " + err.getMessage())
+            )
+        );
     }
-}
+}

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

@@ -1,15 +1,65 @@
 package com.example;
 
-/**
- * Model layer: encapsulates application data and business logic.
- */
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.util.function.Consumer;
+
 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 String baseUrl = "https://ntfy.sh";
+    private final String topic = "java25-erika-chat";
+
+    // Skickar ett textmeddelande till ntfy
+    public void sendMessage(String message) {
+        try {
+            var url = new URL(baseUrl + "/" + topic);
+            var conn = (HttpURLConnection) url.openConnection();
+
+            conn.setRequestMethod("POST");
+            conn.setDoOutput(true);
+
+            conn.getOutputStream().write(message.getBytes());
+
+            System.out.println("Skickat till " + url + ": " + message);
+            conn.disconnect();
+        } catch (Exception e) {
+            System.out.println("Något gick fel: " + e.getMessage());
+        }
+    }
+
+    // Startar en tråd som lyssnar efter nya meddelanden
+    public void startListening(Consumer<String> onMessage, Consumer<Throwable> onError) {
+        new Thread(() -> {
+            try {
+                var url = new URL(baseUrl + "/" + topic + "/json");
+                var conn = (HttpURLConnection) url.openConnection();
+                conn.setRequestMethod("GET");
+
+                var reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
+                String line;
+
+                while ((line = reader.readLine()) != null) {
+                    // Plocka ut texten mellan "message":" och nästa "
+                    int start = line.indexOf("\"message\":\"");
+                    if (start != -1) {
+                        start += 11;
+                        int end = line.indexOf("\"", start);
+                        if (end != -1) {
+                            String msg = line.substring(start, end);
+                            if (onMessage != null) onMessage.accept(msg);
+                        }
+                    }
+                }
+
+            } catch (Throwable ex) {
+                if (onError != null) onError.accept(ex);
+            }
+        }).start();
+    }
+
+    // Visar vilken topic och url som används
+    public String info() {
+        return baseUrl + "/" + topic;
     }
-}
+}

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

@@ -1,9 +1,30 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<?import javafx.scene.layout.StackPane?>
-<?import javafx.scene.control.Label?>
-
-<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>
+
+<!-- Enkel chattvy med lista, textfält och knapp -->
+<?import javafx.scene.layout.BorderPane?>
+<?import javafx.scene.layout.HBox?>
+<?import javafx.scene.control.*?>
+<?import javafx.geometry.Insets?>
+
+<BorderPane xmlns="http://javafx.com/javafx/17" xmlns:fx="http://javafx.com/fxml"
+            fx:controller="com.example.HelloController">
+
+    <!-- Meddelandelista -->
+    <center>
+        <ListView fx:id="messages"/>
+    </center>
+
+    <!-- Textfält och knapp -->
+    <bottom>
+        <HBox spacing="8" alignment="CENTER_LEFT">
+            <TextField fx:id="inputField" promptText="Skriv ett meddelande..." HBox.hgrow="ALWAYS"/>
+            <Button fx:id="sendBtn" text="Skicka" defaultButton="true"/>
+        </HBox>
+    </bottom>
+
+    <!-- Luft runt hela layouten -->
+    <padding>
+        <Insets topRightBottomLeft="8"/>
+    </padding>
+
+</BorderPane>

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

@@ -0,0 +1,26 @@
+package com.example;
+
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+
+public class HelloModelTest {
+
+    @Test
+    void info_returnsCorrectUrl() {
+        HelloModel model = new HelloModel();
+        assertEquals("https://ntfy.sh/java25-erika-chat", model.info());
+    }
+
+    @Test
+    void sendMessage_doesNotThrow() {
+        HelloModel model = new HelloModel();
+        assertDoesNotThrow(() -> model.sendMessage("test"));
+    }
+
+    @Test
+    void startListening_doesNotThrow() {
+        HelloModel model = new HelloModel();
+        assertDoesNotThrow(() -> model.startListening(msg -> {}, err -> {}));
+    }
+}