gistfile1.rb

    def self.parse(filename)
      log = self.new(filename)
      xml = nil

      File.open(filename) do |logfile|
        xml = Nokogiri::XML(logfile)
      end

      xml.xpath('//envelope').collect{|e| Nokogiri::XML(e.to_xml)}.each do |env|
        sender = env.xpath('//sender').first.text
        env.xpath('//message').each do |xmlmsg|
          msg = Message.new(:sender_nick => sender,
                            :received => DateTime.parse(xmlmsg['received']),
                            :text => xmlmsg.text.gsub(/^\s*/,'').gsub(/\s*$/,''))

          if block_given?
            yield log, msg
          else
            log.messages << msg
          end
        end
      end

      log
    end