all text markdown with redcarpet

app/helpers/merged/merged_helper.rb

@@ -1,5 +1,23 @@
+require "redcarpet"
+
 module Merged
   module MergedHelper
+    @@renderer = nil
+    
+    def renderer
+      return @@renderer unless @@renderer.nil?
+      options = {hard_wrap: true , autolink: true, no_intra_emphasis: true ,
+          safe_links_only: true, no_styles: true ,
+          link_attributes: { target: '_blank' }}
+      html = Redcarpet::Render::HTML.new(options)
+      @@renderer = Redcarpet::Markdown.new(html, options)
+    end
+
+    def markdown(text)
+      text = text.text unless text.is_a?(String)
+      return "" if text.blank?
+      renderer.render(text).html_safe
+    end
     def blue_button( text, url)
       button( text , url , "bg-blue-500" )
     end