Discord-to-Slack bot

discord-to-slack-bot.rb

require "discordrb"
require "httparty"

def notify_slack(message)
  HTTParty.post(
    # people_who_play_games
    "https://hooks.slack.com/services/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
    body: JSON.dump({
      text: message,
      username: "Discord announcement",
      icon_emoji: ":mega:",
    }),
    headers: { "Content-Type" => "application/json" }
  )
end

bot = Discordrb::Bot.new(token: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx")
users = Hash.new

bot.voice_state_update do |event|
  if event.channel.nil?
    if !users.has_key?(event.user.name)
      return
    end
    users.delete(event.user.name)
    if users.length() == 0
      notify_slack "No one is chatting on Discord"
    end
  else
    if users.has_key?(event.user.name)
      return
    end
    if users.length() == 0
      notify_slack "Someone is chatting on <https://discord.gg/xxxxxxxxxxxxxxxxxxxxxxx|the Discord>"
    end
    users[event.user.name] = 1
  end
end

at_exit { bot.stop }
bot.run