Make slack-api great again

async-slack.rb

# This is used in production, but I've extracted everything here, so this particular code is untested, but should work.

gem 'async-http-faraday'
gem 'async-websocket'
gem 'slack-api'

require 'slack'

require 'async/http/url_endpoint'
require 'async/websocket/client'

require 'async/http/faraday'
Faraday.default_adapter = :async_http

module Slack
	class API
		def realtime
			response = post("rtm.start")
			url = response["url"]
			
			endpoint = Async::HTTP::URLEndpoint.parse(url)
			
			peer = endpoint.connect
			client = Async::WebSocket::Client.new(peer, url)
			
			return client unless block_given?
			
			begin
				yield client
			ensure
				client.close
			end
		end
	end
end

class Bot
	def initialize(token: nil, channel: nil)
		@token = token or raise ArgumentError, "No token specified"
		@channel = channel or raise ArgumentError, "No channel specified"

		@client = ::Slack::Client.new(token: @token, logger: LOGGER)
	end

	attr :client

	def send_message(text, channel: @channel)
		@client.chat_postMessage(channel: "#{@channel}", text: text, as_user: true)
	end
end

class Fortune
	def initialize
		@bot = Bot.new(**options)
	end

	def call
		@bot.client.realtime do |websocket|
			while data = websocket.next_message
				next unless text = data['text'] and text =~ /fortune/

				@bot.send_message `fortune`
			end
		end
	end
end