store rendered notes of todos in database to avoid costly rendering when you load a page

lib/tracks/utils.rb

@@ -0,0 +1,45 @@
+module Tracks
+
+  class Utils
+    AUTO_LINK_MESSAGE_RE = %r{message://<[^>]+>} unless const_defined?(:AUTO_LINK_MESSAGE_RE)
+  
+    # Converts message:// links to href. This URL scheme is used on Mac OS X
+    # to link to a mail message in Mail.app.
+    def self.auto_link_message(text)
+      text.gsub(AUTO_LINK_MESSAGE_RE) do
+        href = $&
+        left, right = $`, $'
+        # detect already linked URLs and URLs in the middle of a tag
+        if left =~ /<[^>]+$/ && right =~ /^[^>]*>/
+          # do not change string; URL is alreay linked
+          href
+        else
+          content = content_tag(:a, h(href), :href => h(href))
+        end
+      end
+    end
+
+    def self.render_text(text)
+      rendered = Tracks::Utils.auto_link_message(text)
+      rendered = markdown(rendered)
+      rendered = ActionController::Base.helpers.auto_link(rendered, :link => :urls)
+
+      # add onenote and message protocols
+      Sanitize::Config::RELAXED[:protocols]['a']['href'] << 'onenote'
+      Sanitize::Config::RELAXED[:protocols]['a']['href'] << 'message'
+  
+      rendered = Sanitize.clean(rendered, Sanitize::Config::RELAXED)
+      return rendered
+    end
+    
+    # Uses RedCloth to transform text using either Textile or Markdown Need to
+    # require redcloth above RedCloth 3.0 or greater is needed to use Markdown,
+    # otherwise it only handles Textile
+    #
+    def self.markdown(text)
+      RedCloth.new(text).to_html
+    end
+
+  end
+  
+end