update layouts

layouts/ga.html

@@ -0,0 +1,31 @@
+{{- $pc := .Site.Config.Privacy.GoogleAnalytics -}}
+{{- if not $pc.Disable }}{{ with .Site.Config.Services.GoogleAnalytics.ID -}}
+{{ if hasPrefix . "G-"}}
+<script async src="https://www.googletagmanager.com/gtag/js?id={{ . }}"></script>
+<script>
+	window.dataLayer = window.dataLayer || [];
+	function gtag(){dataLayer.push(arguments);}
+	gtag('js', new Date());
+    gtag('config', '{{ . }}', {
+        'anonymize_ip': {{- $pc.AnonymizeIP -}},
+        'user_properties': {
+            'analyticsCookieId': get_ga_clientid()
+        }
+    });
+
+    function get_ga_clientid() {
+        var cookie = {};
+        document.cookie.split(';').forEach(function(el) {
+            var splitCookie = el.split('=');
+            var key = splitCookie[0].trim();
+            var value = splitCookie[1];
+            cookie[key] = value;
+        });
+
+        if ('undefined' === typeof cookie['_ga']) {return ''};
+
+        return cookie['_ga'].substring(6);
+    }
+</script>
+{{- end }}{{ end -}}
+{{- end -}}