Discord Music Bot (TypeScript)

Discord music bot template written in TypeScript using discord.js and shoukaku, with Lavalink support.

Features

• Slash commands (e.g., /ping, /join, /play, /leave)
• shoukaku integration for robust Lavalink audio playback
• Modular command and event handlers written in TypeScript
• Basic Docker support (Dockerfile, docker-compose.yml)
• Comprehensive test suite with Jest

Prerequisites

• Node.js (>=16 recommended, check package.json for specific engine requirements)
• pnpm (recommended) or npm
• TypeScript (typescript package, usually installed as a dev dependency)
• A Discord application with bot token and client ID
• A running Lavalink server

Setup

1. Clone the repository:

   git clone <repository_url>
   cd discord-music-bot
   

2. Install dependencies:

   pnpm install
   

3. Configure Environment: Copy .env.example to .env and fill in your credentials:

   # Discord Bot Token (Required)
   DISCORD_TOKEN=your_discord_bot_token
   
   # Discord Application Client ID (Required for command deployment)
   CLIENT_ID=your_discord_application_id
   
   # Discord Guild ID (Optional, for deploying commands to a specific test server)
   # GUILD_ID=your_guild_id_here
   
   # Lavalink Configuration (Required)
   LAVALINK_HOST=lavalink # Or 127.0.0.1 if running locally without Docker Compose
   LAVALINK_PORT=2333
   LAVALINK_PASSWORD=your_lavalink_password
   # LAVALINK_SECURE=false # Set to true if Lavalink uses SSL/WSS
   
   # Logging Level (Optional, defaults typically to 'info')
   # LOG_LEVEL=info
   
   # YouTube OAuth Token (Optional, needed for YouTube Music via specific plugins)
   # See note below on how to obtain this.
   YOUTUBE_OAUTH_TOKEN=your_youtube_oauth_token_here
   

   Note on YouTube OAuth Token: The YOUTUBE_OAUTH_TOKEN is required by some Lavalink plugins (like the youtube-plugin potentially used here) to access YouTube Music tracks directly. Obtaining this involves:

   1. Go to the Google Cloud Console.
   2. Create a new project or select an existing one.
   3. Navigate to "APIs & Services" -> "Credentials".
   4. Click "Create Credentials" -> "OAuth client ID".
   5. Select Application type: "TVs and Limited Input devices".
   6. Give it a name (e.g., "Lavalink YouTube Music Access").
   7. Click "Create". You'll get a Client ID and Client Secret (you likely won't need the secret directly for the token flow).
   8. Follow the on-screen instructions or Google's documentation for the "OAuth 2.0 for TV and Limited Input devices" flow. This usually involves visiting a specific URL with your client ID, getting a user code, authorizing the application on a separate device/browser logged into your Google account, and then exchanging the device code for a refresh token.
   9. Paste the obtained refresh token as the value for YOUTUBE_OAUTH_TOKEN in your .env file.

4. Build TypeScript (if needed): Many setups use ts-node for development, but for production, you might need to compile:

   pnpm build # Check package.json for the exact build script
   

5. Register Slash Commands: Run the deployment script (ensure CLIENT_ID and DISCORD_TOKEN are set in .env).

   pnpm deploy # Check package.json for the exact deploy script (might be node/ts-node deploy-commands.ts)
   

6. Start the Bot:

   pnpm start # Check package.json for the exact start script (might run compiled JS or use ts-node)
   

Testing

The project includes a comprehensive test suite using Jest. The tests cover commands, events, and utilities.

Running Tests

# Run all tests with coverage report
pnpm test

# Run tests in watch mode during development
pnpm test:watch

# Run tests in CI environment
pnpm test:ci

Test Structure

tests/
├── commands/           # Tests for bot commands
│   ├── join.test.ts
│   ├── leave.test.ts
│   ├── ping.test.ts
│   └── play.test.ts
├── events/            # Tests for event handlers
│   ├── interactionCreate.test.ts
│   ├── ready.test.ts
│   └── voiceStateUpdate.test.ts
└── utils/            # Test utilities and mocks
    ├── setup.ts     # Jest setup and global mocks
    ├── testUtils.ts # Common test utilities
    └── types.ts     # TypeScript types for tests

Coverage Requirements

The project maintains high test coverage requirements:

• Branches: 80%
• Functions: 80%
• Lines: 80%
• Statements: 80%

Docker

A Dockerfile and docker-compose.yml are provided for containerized deployment.

• Ensure your .env file is configured correctly.
• Build and run with Docker Compose:

  docker-compose up --build -d # Use -d to run in detached mode
  

• The docker-compose.yml includes both the bot service and a Lavalink service.

Project Structure

.
├── src/                      # Source code directory
│   ├── commands/             # Slash command modules (.ts)
│   ├── events/              # Discord.js and Shoukaku event handlers (.ts)
│   ├── structures/          # Custom structures or base classes (e.g., Shoukaku event handlers)
│   └── utils/               # Utility functions (e.g., logger.ts)
├── tests/                   # Test files (see Testing section)
├── plugins/                 # Lavalink plugins (e.g., youtube-plugin-*.jar)
├── .env.example            # Example environment variables
├── application.yml         # Lavalink server configuration
├── deploy-commands.ts      # Script to register slash commands
├── docker-compose.yml      # Docker Compose configuration
├── Dockerfile             # Dockerfile for building the bot image
├── jest.config.ts        # Jest test configuration
├── package.json          # Node.js project manifest
├── tsconfig.json        # TypeScript compiler options
└── update-plugin.sh    # Script to update Lavalink plugins

License

This project is licensed under the GNU General Public License v3.0. See the LICENSE file for details.