Implement premium features discoverability on successful subscription page with split test (#8336)

GitOrigin-RevId: 362fa289fa6e009e316dcaceae0587f5fc18162c

services/web/app/src/Features/Subscription/SubscriptionController.js

@@ -307,12 +307,23 @@ async function successfulSubscription(req, res) {
       user
     )
 
+  const premiumFeaturesDiscoverabilityAssignment =
+    await SplitTestHandler.promises.getAssignment(
+      req,
+      res,
+      'premium-features-discoverability'
+    )
+
+  const premiumFeaturesDiscoverability =
+    premiumFeaturesDiscoverabilityAssignment?.variant === 'active'
+
   if (!personalSubscription) {
     res.redirect('/user/subscription/plans')
   } else {
     res.render('subscriptions/successful_subscription', {
       title: 'thank_you',
       personalSubscription,
+      premiumFeaturesDiscoverability,
     })
   }
 }

services/web/app/views/subscriptions/successful_subscription.pug

@@ -20,6 +20,8 @@ block content
 								a.btn.btn-success.btn-large(href=`/manage/groups/${personalSubscription._id}/members`) #{translate("add_your_first_group_member_now")}
 						p.letter-from-founders
 							p #{translate("thanks_for_subscribing_you_help_sl", {planName:personalSubscription.plan.name})}
+							if premiumFeaturesDiscoverability
+								p !{translate("to_get_the_most_of_sub_check_premium_features", {}, [{name: 'a', attrs: {href: 'https://www.overleaf.com/learn/how-to/Overleaf_premium_features'}}])}
 							p #{translate("need_anything_contact_us_at")} 
 								a(href=`mailto:${settings.adminEmail}`, ng-non-bindable) #{settings.adminEmail}
 								| .

services/web/locales/en.json

@@ -1774,5 +1774,6 @@
   "group_plan_with_name_tooltip": "You are on the __plan__ plan as a member of a group subscription, __groupName__. Click to find out how you could benefit from Overleaf premium features!",
   "commons_plan_tooltip": "You’re on the __plan__ plan because of your affiliation with __institution__. Click to find out how you could benefit from Overleaf premium features!",
   "trial_last_day": "This is the last day of your <b>Overleaf Premium</b> trial",
-  "trial_remaining_days": "__days__ more days on your <b>Overleaf Premium</b> trial"
+  "trial_remaining_days": "__days__ more days on your <b>Overleaf Premium</b> trial",
+  "to_get_the_most_of_sub_check_premium_features": "To get the most out of your subscription, check out the list of <0>__appName__’s premium features</0>"
 }

services/web/test/unit/src/Subscription/SubscriptionControllerTests.js

@@ -403,6 +403,7 @@ describe('SubscriptionController', function () {
         assert.deepEqual(variables, {
           title: 'thank_you',
           personalSubscription: 'foo',
+          premiumFeaturesDiscoverability: false,
         })
         done()
       }