Add banner

app/controllers/form_controller.rb

@@ -161,18 +161,6 @@ private
     params[@log.model_name.param_key]["interruption_page_referrer_type"].presence
   end
 
-  def correcting_duplicate_logs_redirect_path
-    class_name = @log.class.name.underscore
-
-    original_log = current_user.send(class_name.pluralize).find_by(id: from_referrer_query("original_log_id"))
-
-    if current_user.send(class_name.pluralize).duplicate_logs(original_log).count.positive?
-      send("#{class_name}_duplicate_logs_path", original_log, original_log_id: original_log.id)
-    else
-      send("#{class_name}_duplicate_logs_path", "#{class_name}_id".to_sym => from_referrer_query("remaining_duplicate_id"), original_log_id: from_referrer_query("original_log_id"))
-    end
-  end
-
   def successful_redirect_path
     if FeatureToggle.deduplication_flow_enabled?
       if is_referrer_type?("duplicate_logs")
@@ -253,4 +241,22 @@ private
   end
 
   CONFIRMATION_PAGE_IDS = %w[uprn_confirmation].freeze
+
+  def correcting_duplicate_logs_redirect_path
+    class_name = @log.class.name.underscore
+
+    original_log = current_user.send(class_name.pluralize).find_by(id: from_referrer_query("original_log_id"))
+
+    if current_user.send(class_name.pluralize).duplicate_logs(original_log).count.positive?
+      flash[:notice] = deduplication_success_banner unless current_user.send(class_name.pluralize).duplicate_logs(@log).count.positive?
+      send("#{class_name}_duplicate_logs_path", original_log, original_log_id: original_log.id)
+    else
+      flash[:notice] = deduplication_success_banner
+      send("#{class_name}_duplicate_logs_path", "#{class_name}_id".to_sym => from_referrer_query("remaining_duplicate_id"), original_log_id: from_referrer_query("original_log_id"))
+    end
+  end
+
+  def deduplication_success_banner
+    "<a class=\"govuk-notification-banner__link govuk-!-font-weight-bold\" href=\"#{send("#{@log.class.name.underscore}_path", @log)}\">Log #{@log.id}</a> is no longer a duplicate and has been removed from the list".html_safe
+  end
 end

spec/features/lettings_log_spec.rb

@@ -513,6 +513,8 @@ RSpec.describe "Lettings Log Features" do
         click_button("Save and continue")
         expect(page).to have_current_path("/lettings-logs/#{lettings_log.id}/duplicate-logs?original_log_id=#{lettings_log.id}")
         expect(page).to have_link("Back to Log #{lettings_log.id}", href: "/lettings-logs/#{lettings_log.id}")
+        expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
+        expect(page).to have_content("Log #{duplicate_log.id} is no longer a duplicate and has been removed from the list")
       end
 
       it "allows deduplicating logs by changing the answers on the original log" do
@@ -521,6 +523,8 @@ RSpec.describe "Lettings Log Features" do
         click_button("Save and continue")
         expect(page).to have_current_path("/lettings-logs/#{duplicate_log.id}/duplicate-logs?original_log_id=#{lettings_log.id}")
         expect(page).to have_link("Back to Log #{lettings_log.id}", href: "/lettings-logs/#{lettings_log.id}")
+        expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
+        expect(page).to have_content("Log #{lettings_log.id} is no longer a duplicate and has been removed from the list")
       end
     end
   end

spec/features/sales_log_spec.rb

@@ -252,6 +252,8 @@ RSpec.describe "Sales Log Features" do
       click_button("Save and continue")
       expect(page).to have_current_path("/sales-logs/#{sales_log.id}/duplicate-logs?original_log_id=#{sales_log.id}")
       expect(page).to have_link("Back to Log #{sales_log.id}", href: "/sales-logs/#{sales_log.id}")
+      expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
+      expect(page).to have_content("Log #{duplicate_log.id} is no longer a duplicate and has been removed from the list")
     end
 
     it "allows deduplicating logs by changing the answers on the original log" do
@@ -260,6 +262,8 @@ RSpec.describe "Sales Log Features" do
       click_button("Save and continue")
       expect(page).to have_current_path("/sales-logs/#{duplicate_log.id}/duplicate-logs?original_log_id=#{sales_log.id}")
       expect(page).to have_link("Back to Log #{sales_log.id}", href: "/sales-logs/#{sales_log.id}")
+      expect(page).to have_css(".govuk-notification-banner.govuk-notification-banner--success")
+      expect(page).to have_content("Log #{sales_log.id} is no longer a duplicate and has been removed from the list")
     end
   end
 end