JDA

This page describes how to integrate Lamp with JDA's slash commands, as well as what to expect out of it.

Setting up

Adding Lamp dependency

To add Lamp to your project, add the following (depending on your project structure):

<dependencies>
  <!-- Required for all platforms -->
  <dependency>
      <groupId>io.github.revxrsal</groupId>
      <artifactId>lamp.common</artifactId> 
      <version>[VERSION]</version>
  </dependency>

  <!-- JDA module -->
  <dependency>
      <groupId>io.github.revxrsal</groupId>
      <artifactId>lamp.jda</artifactId>
      <version>[VERSION]</version>
  </dependency>  
</dependencies>

Latest version:

Optional: Preserve parameter names

Lamp identifies parameters by their names and uses them to generate relevant command metadata. By default, Java does not preserve parameter names reflectively. You need to add the following to your project:

<plugins>
  <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.8.0</version>
    <configuration>
      <compilerArgs>
        <!-- Preserves parameter names -->
        <arg>-parameters</arg>
      </compilerArgs>
    </configuration>
  </plugin>
</plugins>

compileJava { 
    // Preserve parameter names in the bytecode
    options.compilerArgs += ["-parameters"]
}

// optional: if you're using Kotlin
compileKotlin {
    kotlinOptions.javaParameters = true
}

tasks.withType<JavaCompile> {
    // Preserve parameter names in the bytecode
    options.compilerArgs.add("-parameters")
}

// optional: if you're using Kotlin
tasks.withType<KotlinJvmCompile> {
    compilerOptions {
        javaParameters = true
    }
}

JDA-specific annotations

`@Choices`

Defines up to 25 predefined choices for the parameter. The user can only provide one of the choices and cannot specify any other value.

`@CommandPermission`

Annotation for specifying the required Permissions for JDA slash commands

`@GuildOnly`

Marks a command as executable in guilds only.

`@NSFW`

Marks a command as NSFW

Supported JDA types

SlashCommandInteractionEvent and its subclasses in place of CommandActor
User and its subclasses in place of CommandActor
Member and its subclasses in place of CommandActor
MessageChannel and its subclasses in place of CommandActor
Role
User
Member
TextChannel
VoiceChannel
StageChannel
NewsChannel
ThreadChannel
ScheduledEvent
Category
Emoji

Example

public static void main(String[] args) {
    JDA jda = JDABuilder.createDefault(args[0]).build();
    var lamp = JDALamp.builder().build();

    // register all our commands here
    lamp.register(new ModerationCommands());
    lamp.register(new LevelCommands());
    lamp.register(new RoleCommands());
    lamp.register(new SupportCommands());

    // after we register all commands, we *must* call this to
    // send our commands as slash commands
    //
    // slashCommands is JDAVisitors#slashCommands. We
    // use static imports for brevity.
    lamp.accept(slashCommands(jda));
}

fun main(args: Array<String>) {
    val jda = JDABuilder.createDefault(args[0]).build()
    val lamp = JDALamp.builder().build()

    // Register all our commands here
    lamp.register(ModerationCommands())
    lamp.register(LevelCommands())
    lamp.register(RoleCommands())
    lamp.register(SupportCommands())

    // After we register all commands, we *must* call this to
    // send our commands as slash commands
    //
    // slashCommands is JDAVisitors#slashCommands. We
    // use static imports for brevity.
    lamp.accept(slashCommands(jda))
}

Example: /ban command

@Command("ban")
@Description("Bans the given user")
@CommandPermission(Permission.BAN_MEMBERS)
public void ban(
    SlashCommandActor actor,
    Member target,
    @Range(min = 1) long days
) {
    actor.replyToInteraction("User **" + target.getEffectiveName() + "** has been banned!").queue();
}

@Command("ban")
@Description("Bans the given user")
@CommandPermission(Permission.BAN_MEMBERS)
fun ban(
    actor: SlashCommandActor,
    target: Member,
    @Range(min = 1) days: Long
) {
    actor.replyToInteraction("User **${target.effectiveName}** has been banned!").queue()
}

Which will also do client-side range validation:

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Last updated 9 months ago

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