add chartbeat option for great success (and metrics)

app/helpers/analytics_helper.rb

@@ -25,9 +25,42 @@ module AnalyticsHelper
     end
   end
 
+  def chartbeat_head_block
+    return unless chartbeat_configured?
+    javascript_tag("var _sf_startpt=(new Date()).getTime()")
+  end
+
+  def include_chartbeat
+    return unless chartbeat_configured?
+    javascript_tag do
+      <<-JS
+        var _sf_async_config = { uid: #{AppConfig[:charbeat_uid]}, domain: '#{AppConfig[:pod_url]}' };
+        (function() {
+          function loadChartbeat() {
+            window._sf_endpt = (new Date()).getTime();
+            var e = document.createElement('script');
+            e.setAttribute('language', 'javascript');
+            e.setAttribute('type', 'text/javascript');
+            e.setAttribute('src',
+                           (("https:" == document.location.protocol) ? "https://a248.e.akamai.net/chartbeat.download.akamai.com/102508/" : "http://static.chartbeat.com/") +
+                               "js/chartbeat.js");
+            document.body.appendChild(e);
+          };
+          var oldonload = window.onload;
+          window.onload = (typeof window.onload != 'function') ?
+              loadChartbeat : function() { oldonload(); loadChartbeat(); };
+        })();
+      JS
+    end
+  end
+
   private
 
   def google_configured?
     AppConfig[:google_a_site].present? && AppConfig[:google_a_site].present?
   end
+
+  def chartbeat_configured?
+    AppConfig[:chartbeat_uid].present?
+  end
 end
\ No newline at end of file

app/views/layouts/application.html.haml

@@ -19,6 +19,8 @@
     %title
       = page_title yield(:page_title)
 
+    = chartbeat_head_block
+
     = include_base_css_framework
     = stylesheet_link_tag 'login', 'application', 'default'
 
@@ -73,3 +75,5 @@
           %li= link_to t('.whats_new'), 'https://github.com/diaspora/diaspora/wiki/Changelog'
           %li= link_to(t('layouts.application.toggle'), toggle_mobile_path)  if is_mobile_device?
         = image_tag 'branding/powered_by_diaspora.png', :height => "11px", :width => "145px"
+
+    = include_chartbeat

app/views/layouts/post.html.haml

@@ -20,6 +20,8 @@
     %link{:rel => 'apple-touch-icon', :href => '/apple-touch-icon.png'}
 
     = og_site_name
+    = chartbeat_head_block
+
     %title
       = page_title yield(:page_title)
 
@@ -58,3 +60,5 @@
     = flash_messages
     #container
     = javascript_tag  "window.preLoadContent = '#{escape_javascript(yield)}'"
+
+    = include_chartbeat

config/application.yml.example

@@ -82,6 +82,9 @@ defaults: &defaults
   # the site url in raw format (e.g. pikwik.examplehost.com)
   piwik_url:
 
+  ## Chartbeat tracking
+  chartbeat_uid:
+
   ######################################################
   # General Pod Settings
   ######################################################