Cadency-rs

A discord bot that's using slash commands written in Rust with the help of serenity and songbird.

WARNING: Cadency is not production ready! It might eat your laundry.

Features

• Play songs from Youtube using a url or a search phrase
• Add complete Youtube playlists to the song queue
• Maintain a queue of songs which you can pause, skip, resume, loop, ...
• Look something up in the Urban Dictionary
• Let Cadency-rs say something inspiring
• Slap someone with a trout (old IRC gag)
• Calculate a number in the fibonacci sequence
• Roll a dice e.g. 2d6+3
• And play a classic game of ping pong

Installation

The recommended way to install and run Cadency-rs is with Docker, as the Docker image installs several libraries and executables that are required to use the bot.

1. Pull the image from the ghcr.io registry (main pulls the latest stable build, develop latest development build, vX.X.X pulls a fixed version)

docker pull ghcr.io/jontze/cadency_rs:main

2. Start a container and pass your discord bot token to the container by setting the DISCORD_TOKEN environment variable and optional specify the log level e.g. RUST_LOG="cadency=debug".
3. Invite the bot to your discord server, discord offers great documentation on how to do this.

Permissions

Cadency requires the bot scope and several permissions on a server to work properly. Therefore, ensure to set these in the developer portal during the creation of the invite link:

• Send Messages
• Connect
• Speak

Example docker setup

Replace the TOKEN_HERE with your token:

docker run --name cadency_rs -d -it --rm -e DISCORD_TOKEN=DISCORD_TOKEN_HERE ghcr.io/jontze/cadency_rs:main

This runs the container in detatched mode (background) and removes it when it stops running. This makes sure that you are always using an up-to-date version of cadency-rs.
To stop the container, execute the following command and substitute ID for the id that was returned when running the docker run command:

docker stop ID

Environment Variables

Variable Name	Default Value	Description	Required
DISCORD_TOKEN		Discord bot token	true
RUST_LOG	cadency=info	Log Level	false
CADENCY_PLAYLIST_SONG_LIMIT	30	Maximum amount of songs that can be added from a playlist	false
CADENCY_SONG_LENGTH_LIMIT	600.00	Maximum allowed song length in seconds	false

Contributing

1. Install the latest stable rust toolchain
2. Intall yt-dlp
3. Clone the repository
4. Create a discord bot in the discord developer portal so you can run the bot local on your computer
5. Set the environment variables in your shell that are listed as example in .env.example
6. You should be able to run cargo test and cargo run successfully

Note

You may have to install the development versions of Opus (opus-dev / opus-devel) and/or cmake (check your distribution for specific name). The best way to test if you have those installed, is to run cargo test or cargo run and see if any errors mentions either package.