show errors if confirm not checked on review page

Because this is not an active record error we have
to have some custom behaviour here.

lib/engines/content_block_manager/app/controllers/content_block_manager/content_block/editions/workflow_controller.rb

@@ -61,6 +61,7 @@ def edit_draft
 
   def review
     @content_block_edition = ContentBlockManager::ContentBlock::Edition.find(params[:id])
+    @review_errors = [REVIEW_ERROR.new(attribute: "is_confirmed", full_message: "Confirm details are correct")]
 
     render :review
   end
@@ -119,8 +120,17 @@ def schedule_or_publish
     render "content_block_manager/content_block/editions/workflow/schedule_publishing"
   end
 
+  REVIEW_ERROR = Data.define(:attribute, :full_message)
   def publish
+    if params[:step] == NEW_BLOCK_STEPS[:review] && params[:is_confirmed].blank?
+      raise StandardError
+    end
+
     new_edition = ContentBlockManager::PublishEditionService.new.call(@content_block_edition)
     redirect_to content_block_manager.content_block_manager_content_block_workflow_path(id: new_edition.id, step: :confirmation)
+  rescue StandardError
+    @confirm_error_copy = "Confirm details are correct"
+    @error_summary_errors = [{ text: @confirm_error_copy, href: "#is_confirmed-0" }]
+    render "content_block_manager/content_block/editions/workflow/review"
   end
 end

lib/engines/content_block_manager/app/views/content_block_manager/content_block/editions/workflow/review.html.erb

@@ -6,6 +6,13 @@
   } %>
 <% end %>
 
+<% if @error_summary_errors %>
+  <%= render "govuk_publishing_components/components/error_summary", {
+    title: "There is a problem",
+    items: @error_summary_errors,
+  } %>
+<% end %>
+
 <div class="govuk-grid-row">
   <div class="govuk-grid-column-full">
     <%= render(
@@ -16,9 +23,28 @@
   </div>
 </div>
 
+<%= form_with(url: content_block_manager.content_block_manager_content_block_workflow_path(@content_block_edition, step: ContentBlockManager::ContentBlock::Editions::WorkflowController::NEW_BLOCK_STEPS[:review]), method: :put) do %>
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-full">
+    <%= render "govuk_publishing_components/components/checkboxes", {
+      name: "is_confirmed",
+      id: "is_confirmed",
+      heading: "Confirm",
+      visually_hide_heading: true,
+      no_hint_text: true,
+      error: @confirm_error_copy,
+      items: [
+        {
+          label: "By creating this content block you are confirming that, to the best of your knowledge, the details you are providing are correct.",
+          value: true,
+        },
+      ],
+    } %>
+  </div>
+</div>
+
 <div class="govuk-grid-row">
   <div class="govuk-grid-column-full">
-    <%= form_with(url: content_block_manager.content_block_manager_content_block_workflow_path(@content_block_edition, step: ContentBlockManager::ContentBlock::Editions::WorkflowController::NEW_BLOCK_STEPS[:review]), method: :put) do %>
       <div class="govuk-button-group govuk-!-margin-bottom-6">
         <div>
           <%= render "govuk_publishing_components/components/button", {

lib/engines/content_block_manager/features/create_object.feature

@@ -24,6 +24,7 @@ Feature: Create a content object
       | title            | email_address   | department | organisation        | instructions_to_publishers |
       | my email address | foo@example.com | Somewhere  | Ministry of Example | this is important  |
     Then I am asked to review my answers
+    And I confirm my answers are correct
     When I click confirm
     Then the edition should have been created successfully
     And I should be taken to the confirmation page
@@ -52,6 +53,19 @@ Feature: Create a content object
       | my email address | xxxxx           | Somewhere  | Ministry of Example |
     Then I should see a message that the "email_address" field is an invalid "email"
 
+  Scenario: GDS editor sees validation errors for unconfirmed answers
+    When I visit the Content Block Manager home page
+    And I click to create an object
+    Then I should see all the schemas listed
+    When I click on the "email_address" schema
+    Then I should see a form for the schema
+    When I complete the form with the following fields:
+      | title            | email_address   | department | organisation |
+      | my email address | foo@example.com           | Somewhere  | Ministry of Example |
+    Then I am asked to review my answers
+    When I click confirm
+    Then I should see a message that I need to confirm the details are correct
+
   Scenario: GDS editor does not see error when not providing instructions to publishers
     When I visit the Content Block Manager home page
     And I click to create an object
@@ -86,6 +100,7 @@ Feature: Create a content object
       | title            |
       | my email address 2 |
     Then I am asked to review my answers
+    And I confirm my answers are correct
     When I click confirm
     Then the edition should have been created successfully
     And I should be taken to the confirmation page

lib/engines/content_block_manager/features/step_definitions/content_block_manager_steps.rb

@@ -405,6 +405,10 @@ def should_show_edit_form_for_email_address_content_block(document_title, email_
   assert_text "#{ContentBlockManager::ContentBlock::Edition.human_attribute_name("details_#{field_name}")} is an invalid #{format.titleize}"
 end
 
+Then("I should see a message that I need to confirm the details are correct") do
+  assert_text "Confirm details are correct", minimum: 2
+end
+
 Then("I should see a permissions error") do
   assert_text "Permissions error"
 end
@@ -432,6 +436,10 @@ def should_show_edit_form_for_email_address_content_block(document_title, email_
   assert_text "Review email address"
 end
 
+Then("I confirm my answers are correct") do
+  check "By creating this content block you are confirming that, to the best of your knowledge, the details you are providing are correct."
+end
+
 Then("I accept and publish") do
   click_on "Accept and publish"
 end

lib/engines/content_block_manager/test/integration/content_block/workflow_test.rb

@@ -44,11 +44,23 @@ class ContentBlockManager::ContentBlock::WorkflowTest < ActionDispatch::Integrat
       describe "#update" do
         it "posts the new edition to the Publishing API and marks edition as published" do
           assert_edition_is_published do
-            put content_block_manager.content_block_manager_content_block_workflow_path(id: edition.id, step:)
+            put content_block_manager.content_block_manager_content_block_workflow_path(id: edition.id, step:, is_confirmed: true)
           end
         end
       end
     end
+
+    describe "when the edition details have not been confirmed" do
+      let(:step) { ContentBlockManager::ContentBlock::Editions::WorkflowController::NEW_BLOCK_STEPS[:review] }
+
+      describe "#update" do
+        it "returns to the review page" do
+          put content_block_manager.content_block_manager_content_block_workflow_path(id: edition.id, step:)
+
+          assert_template "content_block_manager/content_block/editions/workflow/review"
+        end
+      end
+    end
   end
 
   describe "when updating an existing content block" do