From 562123f06abaa8a559ec38574ae640bd87c5a989 Mon Sep 17 00:00:00 2001
From: Simon Backx <simon@ghost.org>
Date: Tue, 12 Sep 2023 11:21:37 +0200
Subject: [PATCH] Added attribution to recommendation clicks (#18077)

fixes https://github.com/TryGhost/Product/issues/3865
---
 apps/portal/src/actions.js                    |  4 +--
 .../components/pages/RecommendationsPage.js   | 26 +++++++++++++++----
 apps/portal/src/utils/helpers.js              |  5 ++++
 3 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/apps/portal/src/actions.js b/apps/portal/src/actions.js
index e6fac26ff6..6aafb386b7 100644
--- a/apps/portal/src/actions.js
+++ b/apps/portal/src/actions.js
@@ -1,6 +1,6 @@
 import setupGhostApi from './utils/api';
 import {HumanReadableError} from './utils/errors';
-import {createPopupNotification, getMemberEmail, getMemberName, getProductCadenceFromPrice, removePortalLinkFromUrl} from './utils/helpers';
+import {createPopupNotification, getMemberEmail, getMemberName, getProductCadenceFromPrice, removePortalLinkFromUrl, getRefDomain} from './utils/helpers';
 
 function switchPage({data, state}) {
     return {
@@ -480,7 +480,7 @@ async function oneClickSubscribe({data: {siteUrl}, state}) {
     const {t, member} = state;
 
     const referrerUrl = window.location.href;
-    const referrerSource = window.location.hostname.replace(/^www\./, '');
+    const referrerSource = getRefDomain();
 
     await externalSiteApi.member.sendMagicLink({
         emailType: 'signup',
diff --git a/apps/portal/src/components/pages/RecommendationsPage.js b/apps/portal/src/components/pages/RecommendationsPage.js
index b78c291f6e..3d3199857b 100644
--- a/apps/portal/src/components/pages/RecommendationsPage.js
+++ b/apps/portal/src/components/pages/RecommendationsPage.js
@@ -1,10 +1,11 @@
 import AppContext from '../../AppContext';
-import {useContext, useState, useEffect, useCallback} from 'react';
+import {useContext, useState, useEffect, useCallback, useMemo} from 'react';
 import CloseButton from '../common/CloseButton';
 import {clearURLParams} from '../../utils/notifications';
 import LoadingPage from './LoadingPage';
 import {ReactComponent as CheckmarkIcon} from '../../images/icons/checkmark-fill.svg';
 import {ReactComponent as LoaderIcon} from '../../images/icons/loader.svg';
+import {getRefDomain} from '../../utils/helpers';
 
 export const RecommendationsPageStyles = `
     .gh-portal-recommendation-item .gh-portal-list-detail {
@@ -95,10 +96,25 @@ const RecommendationItem = (recommendation) => {
     const [subscribed, setSubscribed] = useState(false);
     const [loading, setLoading] = useState(false);
 
+    const refUrl = useMemo(() => {
+        try {
+            const ref = new URL(url);
+
+            if (ref.searchParams.has('ref') || ref.searchParams.has('utm_source') || ref.searchParams.has('source')) {
+                // Don't overwrite + keep existing source attribution
+                return url;
+            }
+            ref.searchParams.set('ref', getRefDomain());
+            return ref.toString();
+        } catch (_) {
+            return url;
+        }
+    }, [url]);
+
     const visitHandler = useCallback(() => {
         // Open url in a new tab
-        openTab(url);
-    }, [url]);
+        openTab(refUrl);
+    }, [refUrl]);
 
     const oneClickSubscribeHandler = useCallback(async () => {
         try {
@@ -110,13 +126,13 @@ const RecommendationItem = (recommendation) => {
             setSubscribed(true);
         } catch (_) {
             // Open portal signup page
-            const signupUrl = new URL('#/portal/signup', url);
+            const signupUrl = new URL('#/portal/signup', refUrl);
 
             // Trigger a visit
             openTab(signupUrl);
         }
         setLoading(false);
-    }, [setSubscribed, url]);
+    }, [setSubscribed, url, refUrl]);
 
     const clickHandler = useCallback((e) => {
         if (loading) {
diff --git a/apps/portal/src/utils/helpers.js b/apps/portal/src/utils/helpers.js
index e399a6b76f..ee0fbf17b5 100644
--- a/apps/portal/src/utils/helpers.js
+++ b/apps/portal/src/utils/helpers.js
@@ -259,6 +259,11 @@ export function hasMultipleProducts({site}) {
     return false;
 }
 
+export function getRefDomain() {
+    const referrerSource = window.location.hostname.replace(/^www\./, '');
+    return referrerSource;
+}
+
 export function hasMultipleProductsFeature({site}) {
     const {portal_products: portalProducts} = site || {};
     return !!portalProducts;