Route back to the initial log if it still has duplicates

app/controllers/form_controller.rb

@@ -161,17 +161,29 @@ 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 @log.lettings?
+      if is_referrer_type?("duplicate_logs")
-        if is_referrer_type?("duplicate_logs")
+        return correcting_duplicate_logs_redirect_path
-          return send("lettings_log_duplicate_logs_path", lettings_log_id: from_referrer_query("remaining_duplicate_id"), original_log_id: from_referrer_query("original_log_id"))
+      end
-        elsif current_user.lettings_logs.duplicate_logs(@log).count.positive?
+
-          return send("lettings_log_duplicate_logs_path", @log, original_log_id: @log.id)
+      if @log.lettings? && current_user.lettings_logs.duplicate_logs(@log).count.positive?
-        end
+        return send("lettings_log_duplicate_logs_path", @log, original_log_id: @log.id)
-      elsif is_referrer_type?("duplicate_logs")
+      end
-        return send("sales_log_duplicate_logs_path", sales_log_id: from_referrer_query("remaining_duplicate_id"), original_log_id: from_referrer_query("original_log_id"))
+
-      elsif current_user.sales_logs.duplicate_logs(@log).count.positive?
+      if @log.sales? && current_user.sales_logs.duplicate_logs(@log).count.positive?
         return send("sales_log_duplicate_logs_path", @log, original_log_id: @log.id)
       end
     end

spec/requests/form_controller_spec.rb

@@ -755,6 +755,23 @@ RSpec.describe FormController, type: :request do
           it "redirects back to the duplicates page for remaining duplicates" do
             expect(response).to redirect_to("/lettings-logs/#{duplicate_log.id}/duplicate-logs?original_log_id=#{lettings_log.id}")
           end
+
+          context "and the answer didn't change" do
+            let(:params) do
+              {
+                id: lettings_log.id,
+                lettings_log: {
+                  page: "lead_tenant_age",
+                  age1: lettings_log.age1,
+                  age1_known: lettings_log.age1_known,
+                },
+              }
+            end
+
+            it "redirects back to the duplicates page for remaining duplicates" do
+              expect(response).to have_http_status(:ok)
+            end
+          end
         end
 
         context "when the sales question was accessed from a duplicate logs screen" do
@@ -779,6 +796,23 @@ RSpec.describe FormController, type: :request do
           it "redirects back to the duplicates page for remaining duplicates" do
             expect(response).to redirect_to("/sales-logs/#{duplicate_log.id}/duplicate-logs?original_log_id=#{sales_log.id}")
           end
+
+          context "and the answer didn't change" do
+            let(:params) do
+              {
+                id: sales_log.id,
+                sales_log: {
+                  page: "buyer_1_age",
+                  age1: sales_log.age1,
+                  age1_known: sales_log.age1_known,
+                },
+              }
+            end
+
+            it "redirects back to the duplicates page for remaining duplicates" do
+              expect(response).to have_http_status(:ok)
+            end
+          end
         end
       end