set google analytics tag

app/views/layouts/application.html.slim

@@ -10,6 +10,7 @@ html lang="ja"
     link href="//cdnjs.cloudflare.com/ajax/libs/fullcalendar/1.6.4/fullcalendar.print.css" rel="stylesheet" /
     link href="//cdnjs.cloudflare.com/ajax/libs/fullcalendar/1.6.4/fullcalendar.print.css" rel="stylesheet" /
     link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet"
     link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet"
     script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"
     script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"
+    = render partial: 'partials/google_analytics'
     = stylesheet_link_tag    "application", media: "all"
     = stylesheet_link_tag    "application", media: "all"
     = render_style
     = render_style
     = csrf_meta_tags
     = csrf_meta_tags

app/views/partials/_google_analytics.html.slim

+- if Settings.respond_to?(:google_analytics) && Settings.google_analytics.present?
+  javascript:
+    (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+    (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+    m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+    })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+
+    ga('create', '#{Settings.google_analytics}', 'auto');
+    ga('send', 'pageview');

config/settings.yml.example

@@ -19,6 +19,8 @@ defaults: &defaults
     secret_access_key: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
     secret_access_key: "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
     bucket_name: "xxxxxxxxxxxxxxxxxx"
     bucket_name: "xxxxxxxxxxxxxxxxxx"
 
 
+  google_analytics:
+
 development:
 development:
   <<: *defaults
   <<: *defaults