Bot Commands

WolfWave includes an extensible bot command system for Twitch chat integration.

Built-in Commands

Command	Description
`!song`	Shows the currently playing song
`!currentsong`	Shows the currently playing song
`!nowplaying`	Shows the currently playing song
`!lastsong`	Shows the last played song

Architecture

Commands live under Services/Twitch/Commands with a clean, extensible design:

BotCommand protocol defines triggers, description, and execute(message:)
SongCommand handles !song, !currentsong, and !nowplaying and calls the injected getCurrentSongInfo closure
LastSongCommand handles !lastsong and shows the previously played track
BotCommandDispatcher wires commands together and is used inside TwitchChatService

Code Organization

Each command file is fully documented with usage examples
Clear separation between command logic and service integration
Type-safe message processing with optional return values

Adding a New Command

Here's an example of creating a custom command:

/// Command that greets users in chat.
///
/// Triggers: !hello, !hi
final class HelloCommand: BotCommand {
    let triggers = ["!hello", "!hi"]
    let description = "Greets the chatter"

    func execute(message: String) -> String? {
        let trimmed = message.trimmingCharacters(in: .whitespaces).lowercased()

        for trigger in triggers {
            if trimmed.hasPrefix(trigger) {
                return "Hello, chat! 👋"
            }
        }

        return nil
    }
}

Register the Command

Add your command in BotCommandDispatcher.registerDefaultCommands():

private func registerDefaultCommands() {
    register(SongCommand())
    register(LastSongCommand())
    register(HelloCommand())  // Add your new command
}

Add a Settings Toggle (Optional)

If you want users to be able to enable/disable your command, add a toggle in the appropriate settings view.

Command Protocol

The BotCommand protocol defines the interface for all commands:

protocol BotCommand {
    /// The trigger phrases that activate this command (e.g., ["!song", "!currentsong"])
    var triggers: [String] { get }

    /// Human-readable description of what the command does
    var description: String { get }

    /// Execute the command and return an optional response
    /// - Parameter message: The full chat message
    /// - Returns: Response to send to chat, or nil if no response
    func execute(message: String) -> String?
}