# Nick's web site: sgml2xml filter.  Convert SGML tag soup to XML.
#
# Copyright © 2018 Nick Bowler
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

class SGMLToXMLFilter < Nanoc::Filter
    identifier :sgml2xml
    requires 'nokogiri'

    def run(content, params = {})
        doc = Nokogiri::HTML(content)
        doc.internal_subset.remove
        return doc.to_xml(:save_with =>
            Nokogiri::XML::Node::SaveOptions::FORMAT |
            Nokogiri::XML::Node::SaveOptions::AS_XML )
    end
end