application_delegate.rb

class ApplicationDelegate
  include Rails.application.routes.url_helpers
  default_url_options[:host] = ActionMailer::Base.default_url_options[:host]

  attr_reader :c

  def initialize(controller)
    @c = controller
  end

  def call
    if delegate?
      run
      return true
    else
      return false
    end
  end

  private

  def export(variables)
    variables.each do |key, value|
      c.instance_variable_set "@#{key}", value
    end
  end

  def cookies
    c.send :cookies
  end

  def redirect_to(*opts)
    c.send :redirect_to, *opts
  end

  def render(*opts)
    c.send :render, *opts
  end

  def gon
    c.send :gon
  end

  def authorize(*opts)
    c.send :authorize, *opts
  end

  def current_user
    c.send :current_user
  end

  def user_signed_in?
    c.send :user_signed_in?
  end

  def params
    c.send :params
  end

  def controller_path
    c.send :controller_path
  end

  def action_name
    c.send :action_name
  end
end