chore: add google analytics

Author: Lemon73-Computing

hugo.toml

@@ -38,3 +38,7 @@ weight = 30
   [module.hugoVersion]
     extended = false
     min = "0.116.0"
+
+[services]
+  [services.googleAnalytics]
+    id = 'G-29B1VSEP30'

layouts/partials/google_analytics.html

@@ -0,0 +1,22 @@
+{{ if not site.Config.Privacy.GoogleAnalytics.Disable }}
+  {{- with site.Config.Services.GoogleAnalytics.ID }}
+    {{- if strings.HasPrefix (lower .) "ua-" }}
+      {{- warnf "Google Analytics 4 (GA4) replaced Google Universal Analytics (UA) effective 1 July 2023. See https://support.google.com/analytics/answer/11583528. Create a GA4 property and data stream, then replace the Google Analytics ID in your site configuration with the new value." }}
+    {{- else }}
+      <script async src="https://www.googletagmanager.com/gtag/js?id={{ . }}"></script>
+      <script>
+        var doNotTrack = false;
+        if ({{ site.Config.Privacy.GoogleAnalytics.RespectDoNotTrack }}) {
+          var dnt = (navigator.doNotTrack || window.doNotTrack || navigator.msDoNotTrack);
+          var doNotTrack = (dnt == "1" || dnt == "yes");
+        }
+        if (!doNotTrack) {
+          window.dataLayer = window.dataLayer || [];
+          function gtag(){dataLayer.push(arguments);}
+          gtag('js', new Date());
+          gtag('config', '{{ . }}');
+        }
+      </script>
+    {{- end }}
+  {{- end }}
+{{- end -}}

layouts/partials/head.html

@@ -3,3 +3,4 @@
 <title>{{ if .IsHome }}{{ site.Title }}{{ else }}{{ printf "%s | %s" .Title site.Title }}{{ end }}</title>
 {{ partialCached "head/css.html" . }}
 {{ partialCached "head/js.html" . }}
+{{ partial "google_analytics.html" . }}