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class RenderedMarkdownScrubber < Rails::Html::PermitScrubber
def initialize
super
self.tags = %w[a abbr add aside b blockquote br button center cite code col colgroup dd del dl dt em em figcaption h1 h2 h3 h4 h5 h6 hr i img kbd li mark ol p pre q rp rt ruby small source span strong sub sup table tbody td tfoot th thead time tr u ul video]
self.attributes = %w[alt class colspan data-conversation data-lang data-no-instant data-url em height href id loop name ref rel rowspan size span src start strong title type value width]
end
def allowed_node?(node)
@tags.include?(node.name) || valid_codeblock_div?(node)
end
private
def valid_codeblock_div?(node)
node.name == "div" &&
node.attributes.count == 1 &&
node.children.first&.name == "pre" &&
node.parent.name == "#document-fragment" &&
node.attributes.values.any? do |attribute_value|
attribute_value.value == "highlight"
end
end
end
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