refactor integration code

source/site.yml

@@ -21,21 +21,22 @@ site:
     base-url: https://github.com/michaelliao/gitsite/blob/main/source
     # display git link for quick edit:
     link: true
-  comment:
-    disqus:
-      name: gitsite
+  google:
+    analytics: G-5Z40K7NBL5
   contact:
     name: Michael Liao
     github: https://github.com/michaelliao/gitsite
     twitter: https://twitter.com/liaoxuefeng
   books:
     index-marker: true
-
   search:
     # none = no search
     # browser = flex search in browser
     # google = google site search
     type: browser
+  integration:
+    disqus-comment: gitsite
+    google-analytics: G-5Z40K7NBL5
 
 build:
   # copy special files under root dir (ignore if not found):

themes/default/__base__.html

@@ -7,6 +7,18 @@
     <meta name="description" content="{{ site.description }}">
     <meta name="keywords" content="{{ site.keywords }}">
     <title>{% block title %} title {% endblock %}</title>
+
+    {% if site.integration and site.integration.googleAnalytics %}
+    <!-- Google tag (gtag.js) -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id={{ site.integration.googleAnalytics }}"></script>
+    <script>
+        window.dataLayer = window.dataLayer || [];
+        function gtag() { dataLayer.push(arguments); }
+        gtag('js', new Date());
+        gtag('config', '{{ site.integration.googleAnalytics }}');
+    </script>
+    {% endif %}
+
     <script>
         // global status:
         window.gs_status = {

themes/default/__comment__.html

@@ -1,5 +1,5 @@
 <!-- comment -->
-{% if site.comment and site.comment.disqus and site.comment.disqus.name %}
+{% if site.integration and site.integration.disqusComment %}
 <hr class="gsc-border mt-4">
 <div class="mb-4"></div>
 <div id="disqus_thread"></div>
@@ -10,7 +10,7 @@
     };
     (function () {
         var d = document, s = d.createElement('script');
-        s.src = 'https://{{ site.comment.disqus.name }}.disqus.com/embed.js';
+        s.src = 'https://{{ site.integration.disqusComment }}.disqus.com/embed.js';
         s.setAttribute('data-timestamp', +new Date());
         (d.head || d.body).appendChild(s);
     })();