43 lines
1.2 KiB
Ruby
43 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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require "nokogiri"
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require "asciidoctor/extensions/asciidoctor_kroki/extension"
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module Banzai
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module Filter
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# HTML that replaces all diagrams supported by Kroki with the corresponding img tags.
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#
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class KrokiFilter < HTML::Pipeline::Filter
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def call
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return doc unless settings.kroki_enabled
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diagram_selectors = ::Gitlab::Kroki.formats(settings)
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.map { |diagram_type| %(pre[lang="#{diagram_type}"] > code) }
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.join(', ')
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return doc unless doc.at(diagram_selectors)
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diagram_format = "svg"
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doc.css(diagram_selectors).each do |node|
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diagram_type = node.parent['lang']
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img_tag = Nokogiri::HTML::DocumentFragment.parse(%(<img src="#{create_image_src(diagram_type, diagram_format, node.content)}"/>))
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node.parent.replace(img_tag)
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end
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doc
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end
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private
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def create_image_src(type, format, text)
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::AsciidoctorExtensions::KrokiDiagram.new(type, format, text)
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.get_diagram_uri(settings.kroki_url)
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end
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def settings
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Gitlab::CurrentSettings.current_application_settings
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end
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end
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end
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end
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