ad_set_thoughts.rb

require 'yaml'
# From Rails 3 ActiveSupport I believe
class StringInquirer < String
   def method_missing(method_name, *arguments)
     if method_name.to_s[-1,1] == "?"
       self == method_name.to_s[0..-2]
     else
       super
     end
   end
end

class BrandAds
  def initialize(h)
    @page_names = {}
    h.each do |k,v|
      next unless v.kind_of?(Hash)
      next unless v.has_key?("positions") && v["positions"]
      @page_names[k.upcase.to_sym] = AdSet.new(v["positions"])
    end
  end
  def for(name)
    return StringInquirer.new("") unless @page_names.has_key?(name.upcase.to_sym)
    @page_names[name.upcase.to_sym]
  end
end

class AdSet < Array

    def initialize(*args)
      super(*args)
      self.map!{ |v| StringInquirer.new(v) }
      self
    end

    def <<(v)
      insert(0, StringInquirer.new(v))
    end

    alias push <<
    alias unshift <<

    def method_missing(method_name, *arguments)
      return self.any?{ |v| v.send(method_name) }
    end

end

brand_ads = BrandAds.new(YAML.load_file 'config/page_ads.yml')

puts "AdSet is #{brand_ads.for('NEIGHBORS_MORE_INFO_NEL').inspect} and it includes? top_rail positions?  #{brand_ads.for('NEIGHBORS_MORE_INFO_NEL').top_rail?}"

#puts brand_ads.to_yaml
#cool_ad_set = AdSet.new(['top_rail','right_rail','header_text'])

#puts "This AdSet #{cool_ad_set.inspect} contains top_rail? #{cool_ad_set.top_rail?}"
# => This AdSet ["top_rail", "right_rail", "header_text"] contains top_rail? true

#puts "This AdSet #{cool_ad_set.inspect} contains random_thing? #{cool_ad_set.random_thing?}"
# => This AdSet ["top_rail", "right_rail", "header_text"] contains random_thing? false