Hide site-wide messaging for opted-out users (#8409) [deploy]

app/assets/javascripts/initializers/initializeBroadcast.js

@@ -80,14 +80,20 @@ function renderBroadcast(broadcastElement, data) {
 }
 
 /**
- * A function to determine if a broadcast should render
- * Does not render broadcast it has already been inserted,
- * or if the key for the broadcast's title exists in localStorage.
+ * A function to determine if a broadcast should render.
+ * Does not render a broadcast if the current user has opted-out.
+ * Does not render a broadcast it has already been inserted, or
+ * if the key for the broadcast's title exists in localStorage.
  *
  * @function initializeBroadcast
  */
 function initializeBroadcast() {
+  const user = userData();
   const data = broadcastData();
+
+  if (user && !user.display_announcements) {
+    return;
+  }
   if (!data) {
     return;
   }

spec/factories/users.rb

@@ -19,6 +19,7 @@ FactoryBot.define do
     saw_onboarding               { true }
     checked_code_of_conduct      { true }
     checked_terms_and_conditions { true }
+    display_announcements        { true }
     signup_cta_variant           { "navbar_basic" }
     email_digest_periodic        { false }
     bg_color_hex                 { Faker::Color.hex_color }

spec/system/homepage/user_visits_homepage_with_announcement_spec.rb

@@ -86,5 +86,18 @@ RSpec.describe "User visits a homepage", type: :system do
         expect_no_broadcast_data(page)
       end
     end
+
+    context "when opting-out of announcements" do
+      before do
+        user.update!(display_announcements: false)
+        create(:announcement_broadcast, active: true)
+        get "/async_info/base_data" # Explicitly ensure broadcast data is loaded before doing any checks
+        visit "/"
+      end
+
+      it "does not render the broadcast", js: true do
+        expect_no_broadcast_data(page)
+      end
+    end
   end
 end