11a0f34a70d0afa0c979e7183bd9d54c6b5f636d
max
  Wed Mar 1 14:55:03 2023 -0800
adding support for Analytics 4 tags, refs #30725

diff --git src/hg/lib/googleAnalytics.c src/hg/lib/googleAnalytics.c
index ed35f86..42ddf3e 100644
--- src/hg/lib/googleAnalytics.c
+++ src/hg/lib/googleAnalytics.c
@@ -18,30 +18,42 @@
 done = TRUE;	/*	do not repeat this by mistake	*/
 
 char *analyticsKey = cfgOption("analyticsKey");
 
 // link tracking broke in Firefox once. In case this ever happens again, we can
 // now switch off outlink tracking quickly
 boolean trackClicks = cfgOptionBooleanDefault("analytics.trackClicks", TRUE);
 boolean trackButtons = cfgOptionBooleanDefault("analytics.trackButtons", TRUE);
 
 /*	if config is missing or empty, nothing happens here	*/
 if (isEmpty(analyticsKey))
     return;
 
 /* updated to Universal Analytics code 2014-06-19 */
 
+if (startsWith("G-", analyticsKey))
+    {
+    jsInlineF(
+        "<!-- Google tag (gtag.js) -->\n"
+        "<script async src=\"https://www.googletagmanager.com/gtag/js?id=%s\"></script>\n"
+        "<script>\n"
+        "   window.dataLayer = window.dataLayer || [];\n"
+        "   function gtag(){dataLayer.push(arguments);}\n"
+        "   gtag('js', new Date()); gtag('config', '%s');\n"
+        "</script>\n", analyticsKey, analyticsKey);
+    return;
+    }
 // replace analytics.js below with analytics_debug.js to activate ga debugging
 // It will log all events and all data that is sent to the javascript console, very handy
 jsInlineF(
 "  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){\n"
 "  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),\n"
 "  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)\n"
 "  })(window,document,'script','//www.google-analytics.com/analytics.js','ga');\n"
 "  ga('create', '%s', 'auto');\n"
 "  ga('require', 'displayfeatures');\n"
 "  ga('set', 'transport', 'beacon');\n" // default to beacons. Old browser cannot use them, so ga will use an alternative.
 "  ga('send', 'pageview');\n"
 "\n"
 , analyticsKey);
 
 // to reduce the risk of breaking existing click handlers, only track links on hgc and hgTracks pages