Costanza

A discord bot implementing quote responses and a dice notation roller & expression parser.

Getting started

This project requires go and postgres.

To run locally, run the commands after setting up config.toml file and postgres:

$ go get
$ go build
$ ./costanza listen

You can also build the binary by running mage build.

Database migrations are contained under migrations. go-migrate can be used to run them against the DB (and is used by docker-compose to run the migrations in the containerized setup), but any migration tool supporting up/down operations should be fine.

To spin it up in a container (including the DB & running all migrations), use docker-compose up. Naturally you will need Docker & docker-compose installed for this. Running via docker-compose requires directories /var/costanza/db_data & /var/costanza_dev/db_data for the Postgres volume mounts. Using the mage targets for docker-compose based deployments should ensure these directories are created as needed.

There are magefiles for commonly used targets.

Usage

Costanza has the following subcommands:

• listen: listen to incoming Discord events & respond appropriately. This is the main mode of operation
• register: registers the slash commands for the application.
• roll: runs the dice roller using the positional arguments. This is useful for testing out changes to the parser on the command line
• quote: prints a quote to stdout. This is useful for testing changes to quote retrieval.
• cfg: loads configuration from environment. This is useful in debugging issues loading configuration.

The following behaviors are present in listen mode:

• If Costanza is @-ed, it will respond with a random quote from a slightly curated list of George Costanza quotes
• If a user posts between 12:30 AM & 6:00 AM & their user ID is included in INSOMNIAC_IDS or they have a role listed in INSOMNIAC_ROLES, they get a gentle reminder to sleep
• A welcome message is sent when a user joins the guild.
• Will record a variety of activity statistics for listen_guilds in the configs:
  • Record the number of messages a user has sent to the guild.
  • Record game statistics for supported game types (e.g. Wordle)
  • Record the difference of reactions to messages to get top lurkers
  • Record count of messages containing bad language or on "contained" channels
    • Word & channel lists are stored in Postgres

Costanza has these slash commands:

• /chelp: sends brief usage details.
• /license: sends license & version info
• /roll {roll value}: argument text is parsed as a d-notation roll and evaluated.
• /srroll {roll value}: argument text is parsed & evaluated as d-notation, and the resulting value is run as a Shadowrun roll.
• /wodroll {roll value} [chance] [9again] [8again]: argument text is parsed and evaluated as d-notation, and the resulting value is run as a World of Darkness roll. Optional arguments indicate if the roll is a chance die, has 8-again, or 9-again. Rolls of < 1 dice are ran as chance rolls.
• /dhtest {roll value}: argument text is parsed and evaluated as d-notation, and the resulting value is run as a Dark Heresy/Fantasy Flight Warhammer 40k RPG skill test (i.e. over or under 1d100)
• /weather [location]: gets current weather conditions for given location, or defaults from config file. Uses wttr.in for weather data.
• /leaderboard: displays the stats leaderboards for the month so far

Environment Variables

To run this project, you will need to have a config file named config.toml present either in the active directory or in /etc/costanza conforming to the format in example.config.toml. It's recommended to copy that file & replace appropriate values there.

Additionally, for docker-compose compatability reasons, the environment variable COSTANZA_DB_URL will overwrite the connection string config for the Postgres connection. It's recommended to leave this variable unset to avoid confusion.

Troubleshooting

• docker-compose mounts the postgres db under /var/costanza/db_data or /var/costanza_dev/db_data. If you're encountering issues with the db service, check that those directories exist and have proper permissions.
• If you're having trouble getting the application to connect to the DB, verify that the environment variable COSTANZA_DB_URL is unset.

TODO

• Improve test coverage:
  • Add mocked discordgo sessions to improve coverage under /cmd
• Various refactors marked with #TODO
• Add initiative tracking system
• Add rolling types for other popular systems (Savage Worlds?)
  • Dark Heresy/FF 40k damage rolls
• Figure out a good way to print chained rolls that shows intermediate results
• Curate the quote list a bit more
• Add more interesting responses to bad rolls

Why

Constant imposter syndrome mostly.

I named it Costanza because if there was a modern day saint of having the most rotten luck, it would be George. Plus, most of my experiences as a player in D&D involve some Costanza-like decision-making.