Convert to Nokogiri for HTML manipulation

lib/asciidoctor/foodogsquared/converters/html5-extended.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require 'nokogiri'
 require 'mime/types'
 
 module Asciidoctor::Foodogsquared::Converters
@@ -11,29 +12,30 @@ module Asciidoctor::Foodogsquared::Converters
   # Take note this is only intended for the author. The user has to explicitly
   # require them somewhere to make use of this.
   class HTML5Modified < Asciidoctor::Foodogsquared::Converter::Html5Extended
+    register_for 'html5'
+
     def convert_paragraph(node)
-      attributes = html_attributes node
+      html = Nokogiri::XML::DocumentFragment.parse '<p></p>'
+
+      paragraph = html.first_element_child
+      add_common_attributes node, paragraph
 
       if node.title?
-        <<~HTML
-          <p#{attributes.join ' '}>
-            <strong class="title">#{node.captioned_title}</strong>
-            #{node.content}
-          </p>
-        HTML
-      else
-        <<~HTML
-          <p#{attributes.join ' '}>#{node.content}</p>
-        HTML
+        title = html.document.create_element 'strong', class: 'title'
+        title.content = node.captioned_title
+        paragraph.add_child title
       end
+
+      paragraph.inner_html += node.content
+      html.to_html
     end
 
-    def html_attributes(node)
-      attributes = []
-      attributes << %(id="#{node.id}") if node.id
-      attributes << %(class="#{node.role}") if node.role
 
-      attributes
+    def add_common_attributes(node, html)
+      html['id'] = node.id if node.id
+      html['class'] = node.role if node.role
+
+      html
     end
   end
 end