lib/kitabu/markdown.rb in kitabu-3.0.3 vs lib/kitabu/markdown.rb in kitabu-3.1.0

@@ -3,9 +3,41 @@
 module Kitabu
   module Markdown
     class Renderer < Redcarpet::Render::HTML
       include Redcarpet::Render::SmartyPants
       include Rouge::Plugins::Redcarpet
+
+      # Be more flexible than github and support any arbitrary name.
+      ALERT_MARK = /^\[!(?<type>[A-Z]+)\]$/
+
+      # Support alert boxes just like github.
+      # https://github.com/orgs/community/discussions/16925
+      def block_quote(quote)
+        html = Nokogiri::HTML(quote)
+        element = html.css("body > :first-child").first
+
+        matches = element.text.match(ALERT_MARK)
+
+        return "<blockquote>#{quote}</blockquote>" unless matches
+
+        element.remove
+
+        type = matches[:type].downcase
+        type = "info" if type == "note"
+
+        title = I18n.t(
+          type,
+          scope: :notes,
+          default: type.titleize
+        )
+
+        <<~HTML.strip_heredoc
+          <div class="note #{type}">
+            <p class="note--title">#{title}</p>
+            #{html.css('body').inner_html}
+          </div>
+        HTML
+      end
     end
 
     class << self
       # Set markdown renderer
       attr_accessor :processor