Visit me live at tally.iain.nl.

A simple Slack bot to count things. Made as proof of concept.

Slack's Event API posts off to AWS API Gateway, which points to the lambda function in lib/slack_events_to_sns.rb

This lambda function verifies the request, handles URL verification, and posts the events to SNS. An SQS queue is subscribed to this topic, from where messages can be processed in your own tempo.

You need the following environment variables, you can put in .env in development:

AWS_ACCESS_KEY_ID="..."
AWS_SECRET_ACCESS_KEY="..."
AWS_REGION="us-east-1"

# for worker
QUEUE_URL="https://sqs.us-east-1.amazonaws.com/account-id/queue-name"

DATABASE_URL="postgres://localhost:5432/tally"

# for auth web server
SLACK_CLIENT_ID="..."
SLACK_CLIENT_SECRET="..."
SLACK_REDIRECT_URI="..."

Make sure you create the database you specified with DATABASE_URL.

Run the migrations:

$ ./bin/migrate

Run the worker:

$ ./bin/worker

Run the web server:

$ puma