module HTML
  class Pipeline
    module Twitter
      class EmojiFilter < HTML::Pipeline::Filter
        def call
          Twemoji.parse(doc,
            file_ext:   context[:file_ext]   || "svg",
            class_name: context[:class_name] || "emoji",
            img_attrs:  context[:img_attrs],
          )
        end
      end
    end
  end
end

HTML::Pipeline.new [
  HTML::Pipeline::MarkdownFilter,
  HTML::Pipeline::SanitizationFilter,
  ...
  HTML::Pipeline::Twitter::EmojiFilter
], { gfm: true, **options }