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# frozen_string_literal: true
module Banzai
module Filter
class FrontMatterFilter < HTML::Pipeline::Filter
def call
lang_mapping = Gitlab::FrontMatter::DELIM_LANG
html.sub(Gitlab::FrontMatter::PATTERN) do |_match|
lang = $~[:lang].presence || lang_mapping[$~[:delim]]
["```#{lang}", $~[:front_matter], "```", "\n"].join("\n")
end
end
end
end
end
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