From 1cfc9cdc8520efbff1c07532aee86788965adf4e Mon Sep 17 00:00:00 2001
From: Keith Lawrence <keith.lawrence@digital.cabinet-office.gov.uk>
Date: Mon, 10 Feb 2025 15:49:19 +0000
Subject: [PATCH] Add govuk_web_banners gem

- Add JS used by global banners, and banner dependencies
- Add global/emergency banner support in layouts
- Add initializer for emergency banner REDIS support
- Mock redis client in all tests (we're not explicitly
  testing emergency banner support here, since we assume
  that's tested adequately in the gem).
---
 Gemfile                                  | 1 +
 Gemfile.lock                             | 6 ++++++
 app/assets/javascripts/application.js    | 3 +++
 app/views/layouts/account.html.erb       | 2 ++
 app/views/layouts/application.html.erb   | 2 ++
 config/initializers/govuk_web_banners.rb | 4 ++++
 spec/spec_helper.rb                      | 1 +
 7 files changed, 19 insertions(+)
 create mode 100644 config/initializers/govuk_web_banners.rb

diff --git a/Gemfile b/Gemfile
index 7e28a11b..a8f4ae7f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -10,6 +10,7 @@ gem "gds-api-adapters"
 gem "govuk_app_config"
 gem "govuk_personalisation"
 gem "govuk_publishing_components"
+gem "govuk_web_banners"
 gem "jwt"
 gem "plek"
 gem "ratelimit"
diff --git a/Gemfile.lock b/Gemfile.lock
index c6beb4eb..99defadb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -169,6 +169,11 @@ GEM
       capybara (>= 3.36)
       puma
       selenium-webdriver (>= 4.0)
+    govuk_web_banners (1.0.1)
+      govuk_app_config
+      govuk_publishing_components
+      rails (>= 7)
+      redis
     hashdiff (1.1.2)
     http-accept (1.7.0)
     http-cookie (1.0.8)
@@ -656,6 +661,7 @@ DEPENDENCIES
   govuk_publishing_components
   govuk_schemas
   govuk_test
+  govuk_web_banners
   jwt
   plek
   pry-byebug
diff --git a/app/assets/javascripts/application.js b/app/assets/javascripts/application.js
index 5b136e2b..d3f400bb 100644
--- a/app/assets/javascripts/application.js
+++ b/app/assets/javascripts/application.js
@@ -3,4 +3,7 @@
 //= require govuk_publishing_components/components/error-summary
 //= require govuk_publishing_components/components/radio
 //= require govuk_publishing_components/components/feedback
+//= require govuk_publishing_components/components/global-banner
 //= require govuk_publishing_components/components/layout-super-navigation-header
+
+//= require govuk_web_banners/dependencies
diff --git a/app/views/layouts/account.html.erb b/app/views/layouts/account.html.erb
index 5148174c..c2d92287 100644
--- a/app/views/layouts/account.html.erb
+++ b/app/views/layouts/account.html.erb
@@ -21,6 +21,8 @@
 <%= render "govuk_publishing_components/components/layout_for_public", {
   title: yield(:title),
   blue_bar: false,
+  emergency_banner: render("govuk_web_banners/emergency_banner"),
+  global_banner: render("govuk_web_banners/global_banner"),
   omit_feedback_form: true,
   omit_footer_border: true,
   omit_global_banner: true,
diff --git a/app/views/layouts/application.html.erb b/app/views/layouts/application.html.erb
index 9628ff02..b97571fd 100644
--- a/app/views/layouts/application.html.erb
+++ b/app/views/layouts/application.html.erb
@@ -31,6 +31,8 @@
 <%= render "govuk_publishing_components/components/layout_for_public", {
       title: yield(:title),
       show_explore_header: true,
+      emergency_banner: render("govuk_web_banners/emergency_banner"),
+      global_banner: render("govuk_web_banners/global_banner"),
   } do %>
   <%= yield :body %>
 <% end %>
diff --git a/config/initializers/govuk_web_banners.rb b/config/initializers/govuk_web_banners.rb
new file mode 100644
index 00000000..ae35e075
--- /dev/null
+++ b/config/initializers/govuk_web_banners.rb
@@ -0,0 +1,4 @@
+Rails.application.config.emergency_banner_redis_client = Redis.new(
+  url: ENV["EMERGENCY_BANNER_REDIS_URL"],
+  reconnect_attempts: [0, 0.1, 0.25],
+)
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index fe7c25c7..67bec7b9 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -30,5 +30,6 @@
   config.before :each do
     rate_limiter = instance_double(Ratelimit, add: nil, exceeded?: false)
     allow(Ratelimit).to receive(:new).and_return(rate_limiter)
+    Rails.application.config.emergency_banner_redis_client = instance_double(Redis, hgetall: {})
   end
 end