FIX: Missing styles in HTML digest emails

Gemfile

@@ -59,7 +59,7 @@ gem 'redis', :require => ["redis", "redis/connection/hiredis"]
 
 gem 'active_model_serializers'
 
-gem 'truncate_html'
+gem 'html_truncator'
 
 # we had issues with latest, stick to the rev till we figure this out
 # PR that makes it all hang together welcome

Gemfile_rails4.lock

@@ -208,6 +208,8 @@ GEM
     highline (1.6.20)
     hike (1.2.3)
     hiredis (0.4.5)
+    html_truncator (0.3.1)
+      nokogiri (~> 1.5)
     httpauth (0.2.0)
     i18n (0.6.5)
     ice_cube (0.11.0)
@@ -442,7 +444,6 @@ GEM
       polyglot
       polyglot (>= 0.3.1)
     trollop (2.0)
-    truncate_html (0.9.2)
     tzinfo (0.3.38)
     uglifier (2.3.1)
       execjs (>= 0.3.0)
@@ -484,6 +485,7 @@ DEPENDENCIES
   handlebars-source (= 1.0.12)
   highline
   hiredis
+  html_truncator
   image_optim
   image_sorcery
   librarian (>= 0.0.25)
@@ -544,7 +546,6 @@ DEPENDENCIES
   therubyracer
   thin
   timecop
-  truncate_html
   uglifier
   unf
   unicorn

app/helpers/user_notifications_helper.rb

@@ -30,7 +30,6 @@ module UserNotificationsHelper
   end
 
   def email_excerpt(html)
-    html_string = TruncateHtml::HtmlString.new(html)
-    raw Sanitize.clean(TruncateHtml::HtmlTruncator.new(html_string, length: 1000).truncate, Sanitize::Config::RELAXED)
+    raw Sanitize.clean(HTML_Truncator.truncate(html, 300), Sanitize::Config::RELAXED)
   end
 end

lib/email/sender.rb

@@ -34,7 +34,9 @@ module Email
 
       renderer = Email::Renderer.new(@message, opts)
 
-      unless @message.html_part
+      if @message.html_part
+        @message.html_part.body = renderer.html
+      else
         @message.html_part = Mail::Part.new do
           content_type 'text/html; charset=UTF-8'
           body renderer.html

lib/email/styles.rb

@@ -59,6 +59,10 @@ module Email
       style('div.digest-post', 'margin-left: 15px; margin-top: 20px; max-width: 694px;')
       style('div.digest-post h1', 'font-size: 20px;')
       style('span.footer-notice', 'color:#666; font-size:80%')
+
+      style('pre', 'white-space: pre-wrap')
+      style('code', 'background-color: f1f1ff; padding: 2px 5px;')
+      style('pre code', 'display: block; background-color: f1f1ff; padding: 5px')
     end
 
     def to_html