def refresh_feeds
  @channels.each do |channel|
    feeds = Feed.find(:all, :conditions => ["disable = 0 and channel_id = ?", channel.id])
    feeds.each do |feed|
      black_csv = feed.filter_exclude
        black_list = black_csv ? black_csv.downcase.split /[\s,]+/ : []
        items = SimpleRSS.parse(open(feed.rss)).items rescue continue
      items.reject do |item|
        item.title.downcase.split( /\W+/ ).any? {|word| black_list.include? word }
      end.each do |item|
        checksum = item.link.hash
        entry = Entry.find(:first, :conditions => ["checksum = ? and feed_id = ?", checksum.to_s, feed.id])
        entry = Entry.create :feed_id => feed.id, :title => item.title, :link => item.link,
			:description => item.description, :checksum => checksum unless entry
      end
    end
  end
  flash[:notice] = "Retrieval completed."
end