```ruby
#
# == CategoryDecorator
#
class CategoryDecorator < ApplicationDecorator
  include Draper::LazyHelpers
  delegate_all

  def background
    if background?
      retina_image_tag model.background, :image, :small
    else
      'Pas de Background associé'
    end
  end

  def div_color
    unless model.color.blank?
      content_tag(:div, '', style: "background-color: #{model.color}; width: 35px; height: 20px;")
    end
  end

  def in_menu
    arbre do
      status_tag I18n.t("enabled.#{model.show_in_menu}"), (model.show_in_menu? ? :ok : :warn)
    end
  end

  def in_footer
    arbre do
      status_tag I18n.t("enabled.#{model.show_in_footer}"), (model.show_in_footer? ? :ok : :warn)
    end
  end

  #
  # == Optional Modules
  #
  def module
    message = 'Module activé'
    color = 'blue'
    if !model.optional && model.optional_module_id.nil?
      message = 'Module de base'
      color = ''
    else
      if model.optional && !model.optional_module_enabled
        message = 'Module non activé'
        color = 'red'
      end
    end

    arbre do
      status_tag message, color
    end
  end
end
```

Add message when no color chosen
user
```ruby
#
# == CategoryDecorator
#
class CategoryDecorator < ApplicationDecorator
  include Draper::LazyHelpers
  delegate_all

  def background
    if background?
      retina_image_tag model.background, :image, :small
    else
      'Pas de Background associé'
    end
  end

  def div_color
    if model.color.blank?
      content_tag(:span, 'Pas de couleur')
    else
      content_tag(:div, '', style: "background-color: #{model.color}; width: 35px; height: 20px;")
    end
  end

  def in_menu
    arbre do
      status_tag I18n.t("enabled.#{model.show_in_menu}"), (model.show_in_menu? ? :ok : :warn)
    end
  end

  def in_footer
    arbre do
      status_tag I18n.t("enabled.#{model.show_in_footer}"), (model.show_in_footer? ? :ok : :warn)
    end
  end

  #
  # == Optional Modules
  #
  def module
    message = 'Module activé'
    color = 'blue'
    if !model.optional && model.optional_module_id.nil?
      message = 'Module de base'
      color = ''
    else
      if model.optional && !model.optional_module_enabled
        message = 'Module non activé'
        color = 'red'
      end
    end

    arbre do
      status_tag message, color
    end
  end
end
```
assistant