module Slack::Web::Api::Mixins::Ids

def id_for(key, name, prefix, list_method, not_found_error)
  return { 'ok' => true, key.to_s => { 'id' => name } } unless name[0] == prefix
  yield.tap do |list|
    list.public_send(list_method).each do |li|
      if li.name == name[1..-1]
        return Slack::Messages::Message.new('ok' => true, key.to_s => { 'id' => li.id })
      end
    end
  end
  raise Slack::Web::Api::Errors::SlackError, not_found_error
end