## feed.rb
class Feed < ActiveRecord::Base
  has_many :items

  after_create :update_title
  after_create :create_items

  def create_items
    source = self.site_url
    content = ""
    open(source) do |s|
      content = s.read
    end
    rss = RSS::Parser.parse(content, false)

    for item in rss.items
      Item.create(:title => item.title, :item_url => item.link, :description => item.description, :feed_id => self.id)
    end
  end

  def update_title
    source = self.site_url
    content = ""
    open(source) do |s|
      content = s.read
    end
    rss = RSS::Parser.parse(content, false)

    Feed.update(self.id, { :title => rss.channel.title, :description => rss.channel.description })
  end
end