snippet.rb

class GithubWebhooksController
  def payload
    case event
      when 'push'   then handle_push
      when 'delete' then handle_delete
    end 
  end

  private

  def handle_push
    # code
  end

  def handle_delete
    # code
  end

  def event
    request.headers['X-Github-Event']
  end
end