From 7582afa84b00c8f3c0fb41ddd6e1e621823fdeea Mon Sep 17 00:00:00 2001
From: pezholio <pezholio@gmail.com>
Date: Fri, 29 Nov 2024 16:38:41 +0000
Subject: [PATCH 1/2] Add a show_link_to_content_block_manager flag

This will allow us to enable/disable the link to the Content Block
Manager for user testing. It will be enabled by default in
Staging/Integration.
---
 config/features.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/config/features.rb b/config/features.rb
index 435093733..a95dbbc1a 100644
--- a/config/features.rb
+++ b/config/features.rb
@@ -20,4 +20,8 @@
   feature :restrict_access_by_org,
           default: false,
           description: "Restrict access to editions based on the user's org and which org(s) own the edition"
+
+  feature :show_link_to_content_block_manager,
+          default: %w[integration staging].include?(ENV["GOVUK_ENVIRONMENT"]),
+          description: "Shows link to Content Block Manager from Mainstream editor"
 end

From 7400b3b52314f342e275e60be4932379abce2fc4 Mon Sep 17 00:00:00 2001
From: pezholio <pezholio@gmail.com>
Date: Fri, 29 Nov 2024 16:39:18 +0000
Subject: [PATCH 2/2] Add content block guidance in the sidebar

This is only added if the feature flag is set.
---
 .../_content_block_guidance.html.erb          |  8 ++++++
 app/views/legacy_editions/show.html.erb       |  4 +++
 test/integration/edition_edit_test.rb         | 26 +++++++++++++++++++
 3 files changed, 38 insertions(+)
 create mode 100644 app/views/legacy_editions/_content_block_guidance.html.erb

diff --git a/app/views/legacy_editions/_content_block_guidance.html.erb b/app/views/legacy_editions/_content_block_guidance.html.erb
new file mode 100644
index 000000000..af6e4afe5
--- /dev/null
+++ b/app/views/legacy_editions/_content_block_guidance.html.erb
@@ -0,0 +1,8 @@
+<h3 class="remove-top-margin add-bottom-margin">Content block</h3>
+
+<div class="well">
+  <p>
+    To create, edit and use standardised content, go to the
+    <%= link_to "Content Block Manager (opens in new tab)", "#{Plek.external_url_for('whitehall-admin')}/content-block-manager", target: "_blank", rel: "noopener" %>.
+  </p>
+</div>
diff --git a/app/views/legacy_editions/show.html.erb b/app/views/legacy_editions/show.html.erb
index 0aa1d214b..bb7ed19b6 100644
--- a/app/views/legacy_editions/show.html.erb
+++ b/app/views/legacy_editions/show.html.erb
@@ -41,6 +41,10 @@
               <div class="well">
                 <%= render "shared/govspeak_help" %>
               </div>
+
+              <% if Flipflop.show_link_to_content_block_manager? %>
+                <%= render "content_block_guidance" %>
+              <% end %>
             <% end %>
           </div>
 
diff --git a/test/integration/edition_edit_test.rb b/test/integration/edition_edit_test.rb
index df6bf8602..d49732ac9 100644
--- a/test/integration/edition_edit_test.rb
+++ b/test/integration/edition_edit_test.rb
@@ -529,6 +529,32 @@ class EditionEditTest < IntegrationTest
         end
       end
     end
+
+    context "content block guidance" do
+      context "when show_link_to_content_block_manager? is false" do
+        setup do
+          test_strategy = Flipflop::FeatureSet.current.test!
+          test_strategy.switch!(:show_link_to_content_block_manager, false)
+          visit_draft_edition
+        end
+
+        should "not show the content block guidance" do
+          assert_not page.has_text?("Content block")
+        end
+      end
+
+      context "when show_link_to_content_block_manager? is true" do
+        setup do
+          test_strategy = Flipflop::FeatureSet.current.test!
+          test_strategy.switch!(:show_link_to_content_block_manager, true)
+          visit_draft_edition
+        end
+
+        should "show the content block guidance" do
+          assert page.has_text?("Content block")
+        end
+      end
+    end
   end
 
 private