WWDC videos

wwdc.rb

require "date"
require "nokogiri"
require "open-uri"

builder = Nokogiri::XML::Builder.new do |xml|
  xml.feed ({"xml:lang"=>"en-US", "xmlns"=>"http://www.w3.org/2005/Atom"}) {
    xml.id "http://camazotz.com/wwdc.xml"
    xml.link ({"rel"=>"self", "href"=>"http://camazotz.com/wwdc/index.xml"})
    xml.link ({"rel"=>"alternate", "type"=>"text/html", "href"=>"https://developer.apple.com/videos/wwdc/"})
    xml.title "WWDC Videos"
    xml.updated DateTime.now.rfc3339
    
    for year in 2010..2014
      url = "https://developer.apple.com/videos/wwdc/#{year}/"
      html = Nokogiri::HTML(open(url))

      for e in html.xpath("//li[@class='session']") do
        video_id = e.attr("id").split("-")[0]
        time = DateTime.rfc3339("#{year}-06-01T12:00:00Z") + Rational(video_id, 86400)

        video_title_node = (e.xpath(".//li[@class='thumbnail-title']") || []).first
        video_desc_node = (e.xpath(".//div[@class='description active']/p") || []).first
        video_url_node = (e.xpath(".//p[@class='download']/a/@href") || []).first

        if video_title_node && video_desc_node && video_url_node then
          xml.entry {
            xml.id "tag:camazotz.com,#{year}:/wwdc/#{video_id}"
            xml.author { xml.name "Apple" }
            xml.published time.rfc3339
            xml.updated time.rfc3339
            xml.title "#{year}.#{video_id} #{video_title_node.text}"
            xml.content ({"type"=>"text"}) { xml.text video_desc_node.text }
            xml.link ({"rel"=>"alternate", "type"=>"text/html", "href"=>"#{url}##{video_id}"})
            xml.link ({"rel"=>"enclosure", "type"=>"video/mp4", "href"=>video_url_node.text})
          }
        end
      end
    end
  }
end

puts builder.to_xml