Add basics for editionable topical events

Topical Events aren't currently editionable and I'd very much like them to be

app/controllers/admin/editionable_topical_events_controller.rb

@@ -0,0 +1,7 @@
+class Admin::EditionableTopicalEventsController < Admin::EditionsController
+private
+
+  def edition_class
+    EditionableTopicalEvent
+  end
+end

app/controllers/admin/new_document_controller.rb

@@ -24,6 +24,7 @@ def redirect_path(new_document_type)
       publication: new_admin_publication_path,
       speech: new_admin_speech_path,
       statistical_data_set: new_admin_statistical_data_set_path,
+      editionable_topical_event: new_admin_editionable_topical_event_path,
       worldwide_organisation: new_admin_worldwide_organisation_path,
       landing_page: new_admin_landing_page_path,
     }

app/helpers/admin/new_document_helper.rb

@@ -10,6 +10,7 @@ module Admin::NewDocumentHelper
     CaseStudy,
     StatisticalDataSet,
     CallForEvidence,
+    EditionableTopicalEvent,
     WorldwideOrganisation,
     LandingPage,
   ].freeze
@@ -43,6 +44,7 @@ def hint_text(new_document_type)
       publication: "Use this for standalone government documents, white papers, strategy documents, and reports.",
       speech: "Use this for speeches by ministers or other named spokespeople, and ministerial statements to Parliament.",
       statistical_data_set: "Use this for data that you publish monthly or more often without analysis.",
+      editionable_topical_event: "Use this to create new Topical Events",
       worldwide_organisation: "Use this to create a new worldwide organisation page. Do not create a worldwide organisation unless you have permission from your managing editor or GOV.UK department lead.",
       landing_page: "EXPERIMENTAL Use this to create landing pages.",
     }

app/models/editionable_topical_event.rb

@@ -0,0 +1,5 @@
+class EditionableTopicalEvent < Edition
+  def display_type_key
+    "editionable_topical_event"
+  end
+end

app/views/admin/edtionable_topical_events/_form.html.erb

@@ -0,0 +1,13 @@
+<%= form_with model: topical_event, url: [:admin, topical_event], multipart: true do |form| %>
+  <%= render "govuk_publishing_components/components/input", {
+    label: {
+      text: "Name (required)",
+      heading_size: "l",
+    },
+    value: topical_event.name,
+    name: "topical_event[name]",
+    id: "topical_event_name",
+    error_items: errors_for(topical_event.errors, :name),
+  } %>
+
+<% end %>

config/routes.rb

@@ -163,6 +163,8 @@ def redirect(path, options = { prefix: Whitehall.router_prefix })
       end
       resources :operational_fields, except: [:show]
 
+      resources :editionable_topical_events, path: "editionable-topical-events", except: [:index]
+
       resources :topical_events, path: "topical-events" do
         resource :topical_event_about_pages, path: "about"
         resources :topical_event_featurings, path: "featurings" do

lib/whitehall/authority/enforcer.rb

@@ -48,5 +48,6 @@ def find_ruleset_for_instance_or_closest_ancestor(subject)
     "Organisation" => Rules::OrganisationRules,
     "Government" => Rules::GovernmentRules,
     "StatisticsAnnouncement" => Rules::StatisticsAnnouncementRules,
+    "EditionableTopicalEvent" => Rules::EditionableTopicalEventRules,
   }.freeze
 end

lib/whitehall/authority/rules/editionable_topical_event_rules.rb

@@ -0,0 +1,7 @@
+module Whitehall::Authority::Rules
+  EditionableTopicalEventRules = Struct.new(:actor, :subject) do
+    def can?(_action)
+      Flipflop.editionable_topical_events?
+    end
+  end
+end

test/factories/editionable_topical_events.rb

@@ -0,0 +1,7 @@
+FactoryBot.define do
+  factory :editionable_topical_event, class: EditionableTopicalEvent, parent: :edition do
+    title { "editionable-topical-event-title" }
+  end
+
+  factory :draft_editionable_topical_event, parent: :editionable_topical_event, traits: [:draft]
+end

test/functional/admin/editionable_topical_event_controller_test.rb

@@ -0,0 +1,22 @@
+require "test_helper"
+
+class Admin::EditionableTopicalEventsControllerTest < ActionController::TestCase
+  setup do
+    feature_flags.switch! :editionable_topical_events, true
+    login_as :writer
+  end
+
+  should_be_an_admin_controller
+
+  should_allow_creating_of :editionable_topical_event
+  should_allow_editing_of :editionable_topical_event
+
+  test "actions are forbidden when the editionable_topical_events feature flag is disabled" do
+    feature_flags.switch! :editionable_topical_events, false
+    topical_event = create(:editionable_topical_event)
+
+    get :show, params: { id: topical_event.id }
+
+    assert_response :forbidden
+  end
+end

test/functional/admin/new_document_controller_test.rb

@@ -84,6 +84,22 @@ class Admin::NewDocumentControllerTest < ActionController::TestCase
     assert_equal flash[:alert], "Please select a new document option"
   end
 
+  view_test "GET #index renders Topical Event Edition when the editionable_topical_events feature flag is enabled" do
+    feature_flags.switch! :editionable_topical_events, true
+
+    get :index
+
+    assert_select ".govuk-radios__item input[type=radio][name=new_document_options][value=editionable_topical_event]", count: 1
+  end
+
+  view_test "GET #index does not render Topical Event Edition when the editionable_topical_events feature flag is not enabled" do
+    feature_flags.switch! :editionable_topical_events, false
+
+    get :index
+
+    refute_select ".govuk-radios__item input[type=radio][name=new_document_options][value=editionable_topical_event]"
+  end
+
 private
 
   def radio_button_values
@@ -106,6 +122,7 @@ def redirect_options
       "publication": new_admin_publication_path,
       "speech": new_admin_speech_path,
       "statistical_data_set": new_admin_statistical_data_set_path,
+      "editionable_topical_event": new_admin_editionable_topical_event_path,
       "worldwide_organisation": new_admin_worldwide_organisation_path,
     }
   end