module Onebox
  module Engine
    class XkcdOnebox
      include Engine
      include LayoutSupport
      include JSON

      matches_regexp(/^https?:\/\/(www\.)?xkcd\.com\/\d+/)

      def url
        "https://xkcd.com/#{match[:comic_id]}/info.0.json"
      end

      private

        def match
          @match ||= @url.match(%{xkcd\.com/(?<comic_id>\\d+)})
        end

        def data
          {
            link: @url,
            title: raw['safe_title'],
            image: raw['img'],
            description: raw['alt']
          }
        end
    end
  end
end