layout_lookup.rb

class LayoutLookup
  attr_reader :override_css, :ie_ver
  
  def initialize
    @override_css = ''
    @ie_ver = nil
  end
  
  def [](landing)
    case landing
    when "index", "index_b", "index_a"
     'signup'
    when /index_fs_grid/
      @ie_ver = 9
      'signup_fs'
    when /^whitney_\w+$/, /^bb\w+$/
      'signup2'
    when /^af_alt_\w+$/
      'signup_alt'
    when /sugardaddy/
      'sugardaddy'
    when /established_meet/
      @override_css = 'signup/meet'
      'meet'
    when /^index_\w+$/, /^index_fs_\w+$/, /big_men/
      'signup_fs'
    else # no match, set default, match again
      default_layout
    end
  end
  
  def default_layout
    false
  end
end

set_layout.rb

def set_desktop_landing_layout
  lookup = LayoutLookup.new
  params[:layout] = lookup[params[:landing]]
  @ie_ver = lookup.ie_ver
  override_css(lookup.override_css) unless lookup.override_css.blank?
end