Dockerfile

@@ -1,10 +0,0 @@
-FROM maven:3-jdk-8-alpine
-
-WORKDIR /usr/src/app
-
-COPY . /usr/src/app
-RUN mvn package
-
-ENV PORT 5000
-EXPOSE $PORT
-CMD [ "sh", "-c", "mvn -Dserver.port=${PORT} spring-boot:run" ]

pom.xml

@@ -1,33 +1,25 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
-
-	<groupId>com.example</groupId>
-	<artifactId>demo</artifactId>
-	<version>0.0.1-SNAPSHOT</version>
-	<packaging>jar</packaging>
-
-	<name>demo</name>
-	<description>Demo project for Spring Boot</description>
-
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.0.1.RELEASE</version>
+		<version>2.7.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
-
+	<groupId>com.synergyhelix</groupId>
+	<artifactId>countdown</artifactId>
+	<version>1.0.0-SNAPSHOT</version>
+	<name>countdown</name>
+	<description>Countdown Timer API</description>
 	<properties>
-		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<java.version>11</java.version>
-		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<java.version>1.8</java.version>
 	</properties>
-
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
-			<artifactId>spring-boot-starter-web</artifactId>
+			<artifactId>spring-boot-starter</artifactId>
 		</dependency>
 
 		<dependency>
@@ -35,6 +27,18 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-lang3</artifactId>
+			<version>3.12.0</version>
+		</dependency>
+
 	</dependencies>
 
 	<build>
@@ -46,5 +50,4 @@
 		</plugins>
 	</build>
 
-
+</project>
-</project>

src/main/java/com/example/demo/DemoApplication.java

@@ -1,19 +0,0 @@
-package com.example.demo;
-
-import org.springframework.boot.*;
-import org.springframework.boot.autoconfigure.*;
-import org.springframework.web.bind.annotation.*;
-
-@SpringBootApplication
-@RestController
-public class DemoApplication {
-
-	@GetMapping("/")
-	String home() {
-		return "Spring is here!";
-	}
-
-	public static void main(String[] args) {
-		SpringApplication.run(DemoApplication.class, args);
-	}
-}

src/main/java/com/synergyhelix/countdown/CountdownController.java

@@ -0,0 +1,53 @@
+package com.synergyhelix.countdown;
+
+import org.apache.commons.lang3.time.DurationFormatUtils;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.*;
+
+import javax.imageio.ImageIO;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.net.URL;
+import java.time.Duration;
+import java.time.LocalDateTime;
+
+@RestController
+public class CountdownController {
+
+  @GetMapping(value = "/", produces = MediaType.IMAGE_JPEG_VALUE)
+  public byte[] countdown() throws IOException {
+    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+    ImageIO.write(createImage(), "jpg", outputStream);
+
+    return outputStream.toByteArray();
+  }
+
+  private BufferedImage createImage() throws IOException {
+    final BufferedImage image = ImageIO.read(new URL(
+        "https://media-cdn.tripadvisor.com/media/photo-s/04/18/a2/85/chicago.jpg"));
+
+    Graphics g = image.getGraphics();
+
+    Color color = new Color(0, 0, 0, 127);
+    g.setColor(color);
+    g.fillRect(10, 5, 530, 75);
+
+    g.setColor(Color.white);
+    g.setFont(new Font("Courier", Font.BOLD, 57));
+    g.drawString(calculateTimeUntilThing(), 15, 60);
+
+    g.dispose();
+
+    return image;
+  }
+
+  private String calculateTimeUntilThing() {
+    LocalDateTime trip = LocalDateTime.parse("2022-08-13T09:00:00");
+
+    Duration duration = Duration.between(LocalDateTime.now(), trip);
+
+    return DurationFormatUtils.formatDuration(duration.toMillis(), "dd'D' HH'H' mm'M' ss'S'", true);
+  }
+}

src/main/java/com/synergyhelix/countdown/MainApplication.java

@@ -0,0 +1,13 @@
+package com.synergyhelix.countdown;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MainApplication {
+
+  public static void main(String[] args) {
+    SpringApplication.run(MainApplication.class, args);
+  }
+
+}

src/test/java/com/example/demo/DemoApplicationTests.java

@@ -1,28 +0,0 @@
-package com.example.demo;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.springframework.boot.test.context.SpringBootTest;
-import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
-import org.springframework.boot.test.web.client.TestRestTemplate;
-import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.test.context.junit4.SpringRunner;
-import static org.assertj.core.api.Assertions.assertThat;
-
-@RunWith(SpringRunner.class)
-@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
-public class DemoApplicationTests {
-
-	@Test
-	public void contextLoads() {
-	}
-
-	@Autowired
-	private TestRestTemplate restTemplate;
-
-	@Test
-	public void homeResponse() {
-		String body = this.restTemplate.getForObject("/", String.class);
-		assertThat(body).isEqualTo("Spring is here!");
-	}
-}