# frozen_string_literal: true

class Sanitize
  module Transformers
    CleanDoctype = lambda do |env|
      return if env[:is_allowlisted]

      node = env[:node]

      if node.type == Nokogiri::XML::Node::DTD_NODE
        if env[:config][:allow_doctype]
          if node.name != "html"
            document = node.document
            node.unlink
            document.create_internal_subset("html", nil, nil)
          end
        else
          node.unlink
        end
      end
    end
  end
end