refactored

def generate_breadcrumbs(current, breadcrumbs) 
      if current.root?
        [current.id]
      elsif breadcrumbs.present?
        traverse_breadcrumbs(current, breadcrumbs)
      end    
    end
    
    
    def traverse_breadcrumbs(current, breadcrumbs)
      parent_ids = current.parents.collect{|c| c.id }
      if parent_ids.include?(breadcrumbs.last)    
        breadcrumbs << current.id
      else
        rewind_breadcrumbs(current, breadcrumbs)
      end
    end
    
    def rewind_breadcrumbs(current, breadcrumbs)
      if breadcrumbs.include?(current.id)
        while breadcrumbs.last != current.id do
          breadcrumbs.pop
        end
        breadcrumbs
      end
    end