module Niconico
  class Mylist < Fabric
    include Niconico::Helper

    def initialize(ptr, agent=nil)
      super(agent)

      @id = normalize(ptr)
      @mylist = nil
      fetch
    end

    def method_missing(method, *args)
      raise(NoMethodError, method) unless @mylist.respond_to? method
      @mylist[method]
    end

    private

    def normalize(ptr)
      ptr.match(/mylist\/([0-9]+)\??/)[1]
    end

    def fetch
      doc = REXML::Document.new(open("http://www.nicovideo.jp/mylist/#{@id}?rss=2.0").read)

      channel = doc.elements['/rss/channel']

      items = []
      channel.elements.each('item') do |item|
        html_description = item.elements['description/text()'].to_s.gsub(/<p class=\"nico-info\">.+<\/p>/, '')
        description = html_description.gsub(/<\/?.*?>/, '')

        items << OpenStruct.new({
          :title            => item.elements['title/text()'].to_s,
          :link             => item.elements['link/text()'].to_s,
          :guid             => item.elements['guid/text()'].to_s,
          :created_at       => item.elements['pubDate/text()'].to_s,
          :description      => description,
          :html_description => html_description
        })
      end

      @mylist = OpenStruct.new({
        :title       => channel.elements['title/text()'].to_s.gsub(/(^マイリスト\s|‐ニコニコ動画$)/, ''),
        :link        => channel.elements['link/text()'].to_s,
        :description => channel.elements['description/text()'].to_s,
        :created_at  => channel.elements['pubDate/text()'].to_s,
        :updated_at  => channel.elements['lastBuildDate/text()'].to_s,
        :generator   => channel.elements['generator/text()'].to_s,
        :author      => channel.elements['dc:creator/text()'].to_s,
        :language    => channel.elements['language/text()'].to_s,
        :items       => items,
        :items_count => items.size
      })
    end
  end
end