require 'feed-normalizer'
require 'open-uri'
require 'xmlsimple'

require 'descriptive_feed_item.rb'

class Feed < ActiveRecord::Base
  belongs_to :user
  
  def to_links
    return @links unless @links.nil?
    Filter::current_filters.each_filter(:feed_before_grab_items) do |f|
      extend(f)
      run_filter
    end
    @links = grab_items
    Filter::current_filters.each_filter(:feed_after_grab_items) do |f|
      extend(f)
      run_filter
    end
    @links = @links.map{|i| i.extend(DescriptiveFeedItem)}
  end
  
  private
    def grab_items
      unless @normalized_feed = $cache.get(url)
        @normalized_feed = FeedNormalizer::FeedNormalizer.parse(open(url))
        $cache.put(url, @normalized_feed)
      end
      @normalized_feed.entries.map{|e| sanitize e}
    end
    
    def sanitize(entry)
      entry.title ||= '#'
      entry.title = entry.title.sub(/\342\200\223/, "-")
      entry
    end
end