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>

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

@@ -1,14 +1,17 @@
 package com.example;
 
+import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
 import javafx.scene.control.Label;
+import javafx.scene.control.ListView;
 
 /**
  * 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());
+    public ListView<NtfyMessageDto> messageView;
 
     @FXML
     private Label messageLabel;
@@ -18,5 +21,11 @@ private void initialize() {
         if (messageLabel != null) {
             messageLabel.setText(model.getGreeting());
         }
+        messageView.setItems(model.getMessages());
+
+    }
+
+    public void sendMessage(ActionEvent actionEvent) {
+        model.sendMessage();
     }
 }

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

@@ -1,5 +1,6 @@
 package com.example;
 
+import io.github.cdimascio.dotenv.Dotenv;
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
@@ -10,6 +11,9 @@ public class HelloFX extends Application {
 
     @Override
     public void start(Stage stage) throws Exception {
+        Dotenv dotenv = Dotenv.load();
+        System.out.println(dotenv.get("HOST_NAME"));
+
         FXMLLoader fxmlLoader = new FXMLLoader(HelloFX.class.getResource("hello-view.fxml"));
         Parent root = fxmlLoader.load();
         Scene scene = new Scene(root, 640, 480);

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

@@ -1,9 +1,53 @@
 package com.example;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import io.github.cdimascio.dotenv.Dotenv;
+import javafx.application.Platform;
+import javafx.beans.property.SimpleStringProperty;
+import javafx.beans.property.StringProperty;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+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.ArrayList;
+import java.util.Objects;
+
 /**
  * Model layer: encapsulates application data and business logic.
  */
 public class HelloModel {
+
+    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);
+    }
+
     /**
      * Returns a greeting based on the current Java and JavaFX versions.
      */
@@ -12,4 +56,12 @@ public String getGreeting() {
         String javafxVersion = System.getProperty("javafx.version");
         return "Hello, JavaFX " + javafxVersion + ", running on Java " + javaVersion + ".";
     }
+    public void sendMessage() {
+        connection.sendMessage(messageToSend.get());
+    }
+
+    public void receiveMessage() {
+        connection.receiveMessage(m -> Platform.runLater(() -> messages.add(m)));
+    }
 }
+

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

@@ -0,0 +1,10 @@
+package com.example;
+
+import java.util.function.Consumer;
+
+public interface NtfyConnection {
+
+    public boolean sendMessage(String message);
+
+    public void receiveMessage(Consumer<NtfyMessageDto> messageHandler);
+}

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

@@ -0,0 +1,68 @@
+package com.example;
+
+import io.github.cdimascio.dotenv.Dotenv;
+import javafx.application.Platform;
+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 sendMessage(String message) {
+        //Todo: Send message using HTTPClient
+
+        HttpRequest httpRequest = HttpRequest.newBuilder()
+                .POST(HttpRequest.BodyPublishers.ofString("Hello World"))
+                .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 response = http.send(httpRequest, HttpResponse.BodyHandlers.ofString());
+            return true;
+        } catch (IOException e) {
+            System.out.println("Error sending message");
+        } catch (InterruptedException e) {
+            System.out.println("Interrupted");
+        }
+        return false;
+    }
+
+
+    @Override
+    public void receiveMessage(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))
+                        .filter(message -> message.event().equals("message"))
+                        .peek(System.out::println)
+                        .forEach(messageHandler));
+    }
+}

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

@@ -0,0 +1,6 @@
+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/module-info.java

@@ -1,6 +1,10 @@
 module hellofx {
     requires javafx.controls;
     requires javafx.fxml;
+    requires io.github.cdimascio.dotenv.java;
+    requires java.net.http;
+    requires tools.jackson.databind;
+    requires javafx.graphics;
 
     opens com.example to javafx.fxml;
     exports com.example;

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

@@ -2,8 +2,11 @@
 <?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>
+<?import javafx.scene.layout.VBox?>
+<?import javafx.scene.control.Button?>
+<?import javafx.scene.control.ListView?>
+<VBox alignment="CENTER" xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml" fx:controller="com.example.HelloController">
         <Label fx:id="messageLabel" text="Hello, JavaFX!" />
-    </children>
-</StackPane>
+        <Button text="Send message" onAction="#sendMessage"/>
+        <ListView fx:id="messageView"/>
+</VBox>

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

@@ -0,0 +1,41 @@
+package com.example;
+
+import com.github.tomakehurst.wiremock.client.MappingBuilder;
+import com.github.tomakehurst.wiremock.client.WireMock;
+import com.github.tomakehurst.wiremock.junit5.WireMockRuntimeInfo;
+import com.github.tomakehurst.wiremock.junit5.WireMockTest;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.*;
+import static org.assertj.core.api.Assertions.assertThat;
+
+@WireMockTest
+class HelloModelTest {
+
+    @Test
+    @DisplayName("When calling sendMessage it should call connection send")
+    void sendMessageCallsConnectionWithMessageToSend() {
+        //Arrange   Given
+        var spy = new NtfyConnectionSpy();
+        var model = new HelloModel(spy);
+        model.setMessageToSend("Hello World");
+        //Act   When
+        model.sendMessage();
+        //Assert    Then
+        assertThat(spy.message).isEqualTo("Hello World");
+    }
+
+    @Test
+    void sendMessageToFakeServer(WireMockRuntimeInfo wireMockRuntimeInfo) {
+        var con = new NtfyConnectionImpl("http://localhost:" + wireMockRuntimeInfo.getHttpPort());
+        var model = new HelloModel(con);
+        model.setMessageToSend("Hello World");
+        stubFor(post("/mytopic").willReturn(ok()));
+
+        model.sendMessage();
+
+        //Verify call made to server
+        verify(postRequestedFor(urlEqualTo("/mytopic")).withRequestBody(containing("Hello World")));
+    }
+}

src/test/java/com/example/NtfyConnectionSpy.java

@@ -0,0 +1,20 @@
+package com.example;
+
+import java.util.function.Consumer;
+
+public class NtfyConnectionSpy implements NtfyConnection{
+
+    String message;
+
+    @Override
+    public boolean sendMessage(String message) {
+        this.message = message;
+        return true;
+    }
+
+    @Override
+    public void receiveMessage(Consumer<NtfyMessageDto> messageHandler) {
+
+    }
+
+}