gistfile1.rb

module ViewHelpers
  def paginate(collection, route)
    cur = collection.current_page
    tot = collection.total_pages
    ret = ''

    ret << prev_page(collection, route) + ' ' 

    if (1..8) === cur 
      1.upto(9) do |i| 
        if i == cur 
          ret << "#{i} "
        else
          ret << link_to_page(route, i) + ' ' 
        end 
      end 

      ret << '... '
      ret << link_to_page(route, tot-1) + ' ' 
      ret << link_to_page(route, tot) + ' ' 
    elsif (9..tot-8) === cur 
      1.upto(2) do |i| 
        ret << link_to_page(route, i) + ' ' 
      end 

      ret << '... '

      (cur-4).upto(cur+4) do |i| 
        if i == cur 
          ret << "#{i} "
        else
          ret << link_to_page(route, i) + ' ' 
        end 
      end 

      ret << '... '
      ret << link_to_page(route, tot-1) + ' '
      ret << link_to_page(route, tot) + ' '
    else
      1.upto(2) do |i|
        ret << link_to_page(route, i) + ' '
      end

      ret << '... '

      (tot-8).upto(tot) do |i|
        if i == cur
          ret << "#{i} "
        else
          ret << link_to_page(route, i) + ' '
        end
      end
    end

    ret << next_page(collection, route) + ' '
    ret
  end

  private

  def link_to_page(route, page)
    link_to(page, url_for(route, :page, :page => page))
  end

  def prev_page(collection, route)
    collection.previous_page ?  link_to('&laquo; Previous', url_for(route, :page, :page => collection.previous_page)) : '&laquo; Previous'
  end
  def next_page(collection, route)
    collection.next_page ?  link_to('&laquo; Next', url_for(route, :page, :page => collection.next_page)) : '&laquo; Next'
  end
end