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# frozen_string_literal: true
require "nokogiri"
require "asciidoctor_plantuml/plantuml"
module Banzai
module Filter
# HTML that replaces all `lang plantuml` tags with PlantUML img tags.
#
class PlantumlFilter < HTML::Pipeline::Filter
def call
return doc unless settings.plantuml_enabled? && doc.at_xpath(lang_tag)
plantuml_setup
doc.xpath(lang_tag).each do |node|
img_tag = Nokogiri::HTML::DocumentFragment.parse(
Asciidoctor::PlantUml::Processor.plantuml_content(node.content, {}))
node.parent.replace(img_tag)
end
doc
end
private
def lang_tag
@lang_tag ||=
if Feature.enabled?(:use_cmark_renderer)
Gitlab::Utils::Nokogiri.css_to_xpath('pre[lang="plantuml"] > code').freeze
else
Gitlab::Utils::Nokogiri.css_to_xpath('pre > code[lang="plantuml"]').freeze
end
end
def settings
Gitlab::CurrentSettings.current_application_settings
end
def plantuml_setup
Asciidoctor::PlantUml.configure do |conf|
conf.url = settings.plantuml_url
conf.png_enable = settings.plantuml_enabled
conf.svg_enable = false
conf.txt_enable = false
end
end
end
end
end
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