From 71bc4c45bcb58dfdb318e36c6262b0e2af49e0d0 Mon Sep 17 00:00:00 2001
From: MoxAmber <amber.steele@overleaf.com>
Date: Mon, 7 Apr 2025 11:57:36 +0100
Subject: [PATCH] Merge pull request #24373 from overleaf/as-customerio-web-sdk

[web] Set up customerio frontend SDK

GitOrigin-RevId: 0e043163e1f6cd02d8ecf3a3e854e7799d776edd
---
 .../app/src/infrastructure/ExpressLocals.js   |  2 ++
 services/web/app/views/_customer_io.pug       | 26 +++++++++++++++++++
 services/web/app/views/layout-base.pug        |  2 ++
 3 files changed, 30 insertions(+)
 create mode 100644 services/web/app/views/_customer_io.pug

diff --git a/services/web/app/src/infrastructure/ExpressLocals.js b/services/web/app/src/infrastructure/ExpressLocals.js
index 002c342eef..eae1b48219 100644
--- a/services/web/app/src/infrastructure/ExpressLocals.js
+++ b/services/web/app/src/infrastructure/ExpressLocals.js
@@ -429,6 +429,8 @@ module.exports = function (webRouter, privateApiRouter, publicApiRouter) {
       wikiEnabled: Settings.overleaf != null || Settings.proxyLearn,
       templatesEnabled:
         Settings.overleaf != null || Settings.templates?.user_id != null,
+      cioWriteKey: Settings.analytics?.cio?.writeKey,
+      cioSiteId: Settings.analytics?.cio?.siteId,
     }
     next()
   })
diff --git a/services/web/app/views/_customer_io.pug b/services/web/app/views/_customer_io.pug
new file mode 100644
index 0000000000..81d75f7d7f
--- /dev/null
+++ b/services/web/app/views/_customer_io.pug
@@ -0,0 +1,26 @@
+if(customerIoEnabled && ExposedSettings.cioWriteKey && ExposedSettings.cioSiteId)
+	script(type="text/javascript", id="cio-loader", nonce=scriptNonce, data-cio-write-key=ExposedSettings.cioWriteKey, data-cio-site-id=ExposedSettings.cioSiteId, data-session-analytics-id=getSessionAnalyticsId(), data-user-id=getLoggedInUserId()).
+		var cioSettings = document.querySelector('#cio-loader').dataset;
+		var analyticsId = cioSettings.sessionAnalyticsId;
+		var siteId = cioSettings.cioSiteId;
+		var writeKey = cioSettings.cioWriteKey;
+		var userId = cioSettings.userId;
+
+		!function(){var i="cioanalytics", analytics=(window[i]=window[i]||[]);if(!analytics.initialize)if(analytics.invoked)window.console&&console.error&&console.error("Snippet included twice.");else{analytics.invoked=!0;analytics.methods=["trackSubmit","trackClick","trackLink","trackForm","pageview","identify","reset","group","track","ready","alias","debug","page","once","off","on","addSourceMiddleware","addIntegrationMiddleware","setAnonymousId","addDestinationMiddleware"];analytics.factory=function(e){return function(){var t=Array.prototype.slice.call(arguments);t.unshift(e);analytics.push(t);return analytics}};for(var e=0;e<analytics.methods.length;e++){var key=analytics.methods[e];analytics[key]=analytics.factory(key)}analytics.load=function(key,e){var t=document.createElement("script");t.type="text/javascript";t.async=!0;t.setAttribute('data-global-customerio-analytics-key', i);t.src="https://cdp.customer.io/v1/analytics-js/snippet/" + key + "/analytics.min.js";var n=document.getElementsByTagName("script")[0];n.parentNode.insertBefore(t,n);analytics._writeKey=key;analytics._loadOptions=e};analytics.SNIPPET_VERSION="4.15.3";
+			analytics.load(
+				writeKey, 
+				{
+					disableClientPersistence: true,
+					"integrations": {
+						"Customer.io In-App Plugin": {
+							siteId
+						}
+					}
+				}
+			);
+			if (analyticsId) {
+				analytics.setAnonymousId(analyticsId);
+			};
+			// If userId is undefined, identify sends only the anonymousId (aka analyticsId)
+			analytics.identify(userId);
+		}}();
diff --git a/services/web/app/views/layout-base.pug b/services/web/app/views/layout-base.pug
index be874f2076..df503b6356 100644
--- a/services/web/app/views/layout-base.pug
+++ b/services/web/app/views/layout-base.pug
@@ -97,6 +97,8 @@ html(
 	block foot-scripts
 		+foot-scripts
 
+	include _customer_io
+
 	script(type="text/javascript", nonce=scriptNonce).
 		window.addEventListener('DOMContentLoaded', function() {
 			//- Look for bundle