gistfile1.txt

## Helper
  # Used for the column that is the default sort
  def default_sortable_header(column, order, text = nil)
    column = column.to_s.downcase
    order = order.to_s.downcase
    opposite = order == "desc" ? "asc" : "desc"
    text ||= column.humanize
    query_string = ""
    if params[:sort]
      if params[:sort] == column
        text << direction_span(params[:direction] == "desc" ? "&#8595;" : "&#8593;")
      end
    else
      query_string << "sort=#{column}"
      query_string << "&amp;direction="
      query_string << (params[:direction] == order ? opposite : order)
      text << direction_span(opposite == "desc" ? "&#8595;" : "&#8593;")
    end
    link_to text, query_string.blank? ? request.path : "#{request.path}?#{query_string}"
  end
  
  # Used for other columns
  def sortable_header(column, order, text = nil)
    column = column.to_s
    order = order.to_s
    opposite = order == "desc" ? "asc" : "desc"
    text ||= column.humanize
    query_string = "sort=#{column}"
    query_string << "&amp;direction="
    query_string << (params[:sort] == column && params[:direction] == order ? opposite : order)
    if params[:sort] == column
      text << direction_span(params[:direction] == "desc" ? "&#8595;" : "&#8593;")
    end
    link_to text, query_string.blank? ? request.path : "#{request.path}?#{query_string}"
  end

private
  def direction_span(content)
    content_tag :span, content, :class => :direction
  end

## Relevant snippet from the template [Haml, obvs]
      %tr
        %th.attachment= # Attachment column
        %th.main= sortable_header :title, :asc
        - if current_site.show_categories_on_menu?
          %th.tight Categories
        - if current_site.show_tags_on_menu?
          %th.tight Tags
        %th.timestamp= default_sortable_header :created_at, :asc, "Created"
        %th.timestamp= sortable_header :updated_at, :desc, "Updated"
        %th.delete= # 'Delete' link column