gistfile1.txt

# HTML
<ul>
  <% Category.roots.each do |category| %>
  <li class="col-md-2">
    <a href="#"><%= category.name %></a>
    <% if !category.children.empty? %>
    <ul>
      <%= category.decorate.draw_tree %> <!-- TODO : refacto this, here we have very bad decorator methodology /!\ !-->
    </ul>
    <% end %>
  </li>
  <% end %>
</ul>

# DECORATOR
  def draw_tree


=begin
    children.each_with_object({}) do |child, memo|
      memo[:name] = child.children.any? ? child.decorate.draw_tree : {}
    end
=end

    children.inject("") do |memo, child| # We should refacto this code and put the HTML in a view

      memo << "<li class=\"dir\"><a href=\"#\">#{child.name}</a>"
      memo << "<ul>#{child.decorate.draw_tree}</ul>" if not child.children.empty?
      memo << "</li>"

    end.html_safe

  end