Add basic ping-pong function

terra/README.md

@@ -9,6 +9,15 @@ group of chat rooms. If you know Discord, then you know what a server refers to
 waste my time explaining it lol. That said, I do know that the Discord API calls them "guilds" so
 things will probably get a little confusing. (Especially considering [Guilds][3] are a new feature).
 
+## Development
+
+1. To run, `./gradlew :terra:bootRun --args='--spring.profiles.active=live'`
+2. To set some default profiles,
+   `tasks.named<BootRun>("bootRun") { systemProperty("spring.profiles.active", "live") }`
+3. To run with Spring's debug mode, `./gradlew :terra:bootRun --args='--debug'`, [see here][5]
+4. Run the jar directly,
+   `./gradlew :terra:bootJar && java -jar terra/build/libs/terra.jar --spring.profiles.active=live`
+
 ## Notes
 
 I am going to use Spring Boot's [Dependency Management Plugin][4] instead of trying to use the
@@ -53,3 +62,5 @@ Execution failed for task ':discord:generateMetadataFileForMavenJavaPublication'
 [3]: https://support.discord.com/hc/en-us/articles/23187611406999-Guilds-FAQ
 
 [4]: https://docs.spring.io/dependency-management-plugin/docs/current/reference/html/
+
+[5]: https://stackoverflow.com/a/71402717/1858327

terra/build.gradle.kts

@@ -1,3 +1,6 @@
+import org.springframework.boot.gradle.tasks.bundling.BootJar
+import org.springframework.boot.gradle.tasks.run.BootRun
+
 plugins {
     id("dev.jacksonbailey.wheel.java-application-conventions")
     id("dev.jacksonbailey.wheel.shut-up-javadoc")
@@ -29,3 +32,8 @@ dependencies {
     testImplementation("org.springframework.boot:spring-boot-test")
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")
 }
+
+tasks.getByName<BootJar>("bootJar") {
+    // TODO Does this mess up publishing somehow?
+    this.archiveFileName.set("${archiveBaseName.get()}.${archiveExtension.get()}")
+}

terra/src/main/java/dev/jacksonbailey/wheel/terra/PingPong.java

@@ -0,0 +1,43 @@
+package dev.jacksonbailey.wheel.terra;
+
+import net.dv8tion.jda.api.JDA;
+import net.dv8tion.jda.api.entities.Message;
+import net.dv8tion.jda.api.entities.channel.middleman.MessageChannel;
+import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+@Component
+public class PingPong extends ListenerAdapter {
+
+  private static final Logger log = LoggerFactory.getLogger(PingPong.class);
+
+  private final JDA jda;
+
+  public PingPong(JDA jda) {
+    this.jda = jda;
+    // TODO This is wrong wrong wrong!
+    jda.addEventListener(this);
+  }
+
+  @Override
+  public void onMessageReceived(MessageReceivedEvent event) {
+    if (event.getAuthor().isBot()) {
+      return;
+    }
+    // We don't want to respond to other bot accounts, including ourself
+    Message message = event.getMessage();
+    String content = message.getContentRaw();
+    // getContentRaw() is an atomic getter
+    // getContentDisplay() is a lazy getter which modifies the content for e.g. console view (strip
+    // discord formatting)
+    if (content.equals("!ping")) {
+      MessageChannel channel = event.getChannel();
+      channel.sendMessage("Pong!")
+             .queue(); // Important to call .queue() on the RestAction returned by sendMessage(...)
+    }
+  }
+
+}

terra/src/main/java/dev/jacksonbailey/wheel/terra/TerraConfig.java

@@ -1,15 +1,21 @@
 package dev.jacksonbailey.wheel.terra;
 
+import net.dv8tion.jda.api.JDA;
 import net.dv8tion.jda.api.JDABuilder;
+import net.dv8tion.jda.api.requests.GatewayIntent;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
 
 @Configuration
 public class TerraConfig {
 
   @Bean
-  public JDABuilder jdaBuilder(TerraConfigProps terraConfigProps) {
-    return JDABuilder.createDefault(terraConfigProps.token());
+  @Profile("live")
+  public JDA jda(TerraConfigProps terraConfigProps) {
+    return JDABuilder.createDefault(terraConfigProps.token())
+                     .enableIntents(GatewayIntent.MESSAGE_CONTENT)
+                     .build();
   }
 
 }

terra/src/test/java/dev/jacksonbailey/wheel/terra/TerraTestConfig.java

@@ -0,0 +1,19 @@
+package dev.jacksonbailey.wheel.terra;
+
+import static org.mockito.Mockito.mock;
+
+import net.dv8tion.jda.api.JDA;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+
+@Configuration
+public class TerraTestConfig {
+
+  @Bean
+  @Profile("!live")
+  public JDA jda() {
+    return mock(JDA.class);
+  }
+
+}