Snarkov is a Sinatra-based Markov bot for Slack.

The simplest way to set up snarkov is using Heroku. Just press this button to deploy it:

You'll need to set up a Slack outgoing webhook to send messages to snarkov. Set it up so it listens to a single channel of your choice, don't set up a keyword. Copy the integration's token, you'll need it to deploy the app. You'll also need a Slack API token. You can get one by going to this page while logged into Slack. Once you have everything in place, deploy the app, then set the outgoing webhook's url to https://[your-heroku-app].herokuapp.com/markov, and save it.

Snarkov works better if it has a lot of text to work with. To help populate it, you can feed it the entire history of a list of Slack channels. Warning: Depending on how many messages are in the channel's history, this might take a long time, and potentially fill up your free Heroku Redis account very quickly. You'll probably want to go to your Heroku dashboard and upgrade your Redis plan to one of the paid levels before doing this, or use the DAYS option to limit the amount of text you're importing.

To populate redis in production, install the Heroku Toolbelt and run:

$ heroku run rake ingest CHANNELS='#channel-name' --app your-heroku-app-name

The ingest task takes a single channel name, or a comma-separated list of channel names, e.g.:

$ heroku run rake ingest CHANNELS='#random,#general' --app your-heroku-app-name

If you want to import a channel's history going back only a certain number of days, you can add a DAYS option. For example:

$ heroku run rake ingest CHANNELS='#random,#general' DAYS=5 --app your-heroku-app-name

This will import the last 5 days of chat history from the #random and #general channels.

If you only want to import a certain user's messages, use the USERNAME option. For example:

$ heroku run rake ingest CHANNELS='#random,#general' USERNAME="guille" --app your-heroku-app-name

After snarkov is up and running, the outgoing webhook you set up will send every message in the channel you selected (except those from other integrations) to snarkov, which will process and store it for future usage. It might respond with a Markov-generated message of its own, depending on the number you have set in the RESPONSE_CHANCE environment variable, with 0 meaning it will never respond, and 1 meaning it'll respond every single time.

If you have a Mac, a fun thing to do is run this in the terminal:

$ curl -s http://[your-heroku-app]/markov?token=[outgoing-webhook-token] | say -i

1. Install redis
2. Create a .env file and put the config variables there (see .env.example)
3. Run bundle install
4. Run foreman start -f Procfile.dev
5. Send POST requests to http://localhost:5000/markov to populate it, with the text parameter being the message's text, and token the outgoing webhook's token.
6. Send GET requests to http://localhost:5000/markov?token=[OUTGOING_WEBHOOK_TOKEN] to see a random reply

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

Copyright (c) 2014, Guillermo Esteves All rights reserved.

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