From b298dbacb0701045d18a104fb40cbad1897f0fbb Mon Sep 17 00:00:00 2001
From: Kamran Ahmed <kamranahmed.se@gmail.com>
Date: Wed, 23 Jul 2025 15:23:43 +0100
Subject: [PATCH] Add backend even tracking (#8946)

* Add backend even tracking

* Update src/lib/browser.ts

Co-authored-by: Arik Chakma <arikchangma@gmail.com>

---------

Co-authored-by: Arik Chakma <arikchangma@gmail.com>
---
 .astro/types.d.ts                     |  1 +
 src/components/Analytics/analytics.ts | 32 ++++++++++++++-
 src/lib/browser.ts                    | 57 +++++++++++++++++++++++++++
 3 files changed, 89 insertions(+), 1 deletion(-)

diff --git a/.astro/types.d.ts b/.astro/types.d.ts
index f964fe0cf..03d7cc43f 100644
--- a/.astro/types.d.ts
+++ b/.astro/types.d.ts
@@ -1 +1,2 @@
 /// <reference types="astro/client" />
+/// <reference path="content.d.ts" />
\ No newline at end of file
diff --git a/src/components/Analytics/analytics.ts b/src/components/Analytics/analytics.ts
index 0d105033e..07a292f0c 100644
--- a/src/components/Analytics/analytics.ts
+++ b/src/components/Analytics/analytics.ts
@@ -1,4 +1,5 @@
 import { httpPost } from '../../lib/query-http';
+import { getPageTrackingData } from '../../lib/browser';
 
 declare global {
   interface Window {
@@ -26,6 +27,7 @@ window.fireEvent = (props) => {
   const eventId = `${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
 
   if (['course', 'ai_tutor'].includes(category)) {
+    const trackingData = getPageTrackingData();
     const url = new URL(import.meta.env.PUBLIC_API_URL);
     url.pathname = '/api/_t';
     url.searchParams.set('action', action);
@@ -34,7 +36,22 @@ window.fireEvent = (props) => {
     url.searchParams.set('value', value ?? '');
     url.searchParams.set('event_id', eventId);
 
-    httpPost(url.toString(), {}).catch(console.error);
+    httpPost(url.toString(), {
+      page_location: trackingData.page_location,
+      page_path: trackingData.page_path,
+      page_referrer: trackingData.page_referrer,
+      page_title: trackingData.page_title,
+      user_agent: trackingData.user_agent,
+      screen_resolution: trackingData.screen_resolution,
+      viewport_size: trackingData.viewport_size,
+      session_id: trackingData.session_id,
+      gclid: trackingData.gclid,
+      utm_source: trackingData.utm_source,
+      utm_medium: trackingData.utm_medium,
+      utm_campaign: trackingData.utm_campaign,
+      utm_content: trackingData.utm_content,
+      utm_term: trackingData.utm_term,
+    }).catch(console.error);
 
     return;
   }
@@ -50,12 +67,25 @@ window.fireEvent = (props) => {
     return;
   }
 
+  const trackingData = getPageTrackingData();
+  
   window.gtag('event', action, {
     event_category: category,
     event_label: label,
     value: value,
     event_id: eventId,
     source: 'client',
+    page_location: trackingData.page_location,
+    page_path: trackingData.page_path,
+    page_referrer: trackingData.page_referrer,
+    page_title: trackingData.page_title,
+    session_id: trackingData.session_id,
+    gclid: trackingData.gclid,
+    utm_source: trackingData.utm_source,
+    utm_medium: trackingData.utm_medium,
+    utm_campaign: trackingData.utm_campaign,
+    utm_content: trackingData.utm_content,
+    utm_term: trackingData.utm_term,
     ...(callback ? { event_callback: callback } : {}),
   });
 };
diff --git a/src/lib/browser.ts b/src/lib/browser.ts
index 631410fe5..890e43003 100644
--- a/src/lib/browser.ts
+++ b/src/lib/browser.ts
@@ -176,3 +176,60 @@ export function setUrlParams(params: Record<string, string>) {
     window.history.pushState(null, '', url.toString());
   }
 }
+
+export function getGclid(): string | undefined {
+  if (typeof window === 'undefined') {
+    return undefined;
+  }
+
+  const params = new URLSearchParams(window.location.search);
+  const gclid = params.get('gclid');
+  
+  if (gclid) {
+    localStorage.setItem('gclid', gclid);
+    return gclid;
+  }
+  
+  return localStorage.getItem('gclid') || undefined;
+}
+
+export function generateSessionId(): string {
+  if (typeof window === 'undefined') {
+    return '';
+  }
+
+  const existingSessionId = sessionStorage.getItem('session_id');
+  if (existingSessionId) {
+    return existingSessionId;
+  }
+
+  const sessionId = `${Date.now()}-${Math.random().toString(36).slice(2, 11)}`;
+  sessionStorage.setItem('session_id', sessionId);
+  return sessionId;
+}
+
+export function getPageTrackingData() {
+  if (typeof window === 'undefined') {
+    return {};
+  }
+
+  const utmParams = getUrlUtmParams();
+  const storedUtmParams = getStoredUtmParams();
+  
+  return {
+    page_location: window.location.href,
+    page_path: window.location.pathname,
+    page_referrer: document.referrer || undefined,
+    page_title: document.title,
+    user_agent: navigator?.userAgent || '',
+    screen_resolution: `${screen.width}x${screen.height}`,
+    viewport_size: `${window.innerWidth}x${window.innerHeight}`,
+    session_id: generateSessionId(),
+    gclid: getGclid(),
+    utm_source: utmParams.utmSource || storedUtmParams.utmSource,
+    utm_medium: utmParams.utmMedium || storedUtmParams.utmMedium,
+    utm_campaign: utmParams.utmCampaign || storedUtmParams.utmCampaign,
+    utm_content: utmParams.utmContent || storedUtmParams.utmContent,
+    utm_term: utmParams.utmTerm || storedUtmParams.utmTerm,
+  };
+}