Change public statuses pages to mount the web UI (#19301)

app/controllers/concerns/web_app_controller_concern.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module WebAppControllerConcern
+  extend ActiveSupport::Concern
+
+  included do
+    before_action :set_body_classes
+    before_action :set_referrer_policy_header
+  end
+
+  def set_body_classes
+    @body_classes = 'app-body'
+  end
+
+  def set_referrer_policy_header
+    response.headers['Referrer-Policy'] = 'origin'
+  end
+end

app/controllers/home_controller.rb

@@ -1,13 +1,12 @@
 # frozen_string_literal: true
 
 class HomeController < ApplicationController
+  include WebAppControllerConcern
+
   before_action :redirect_unauthenticated_to_permalinks!
-  before_action :set_referrer_policy_header
   before_action :set_instance_presenter
 
-  def index
-    @body_classes = 'app-body'
-  end
+  def index; end
 
   private
 
@@ -19,10 +18,6 @@ class HomeController < ApplicationController
     redirect_to(redirect_path) if redirect_path.present?
   end
 
-  def set_referrer_policy_header
-    response.headers['Referrer-Policy'] = 'origin'
-  end
-
   def set_instance_presenter
     @instance_presenter = InstancePresenter.new
   end

app/controllers/statuses_controller.rb

@@ -5,17 +5,15 @@ class StatusesController < ApplicationController
   include SignatureAuthentication
   include Authorization
   include AccountOwnedConcern
-
-  layout 'public'
+  include WebAppControllerConcern
 
   before_action :require_account_signature!, only: [:show, :activity], if: -> { request.format == :json && authorized_fetch_mode? }
   before_action :set_status
   before_action :set_instance_presenter
   before_action :set_link_headers
   before_action :redirect_to_original, only: :show
-  before_action :set_referrer_policy_header, only: :show
   before_action :set_cache_headers
-  before_action :set_body_classes
+  before_action :set_body_classes, only: :embed
 
   skip_around_action :set_locale, if: -> { request.format == :json }
   skip_before_action :require_functional!, only: [:show, :embed], unless: :whitelist_mode?
@@ -28,8 +26,6 @@ class StatusesController < ApplicationController
     respond_to do |format|
       format.html do
         expires_in 10.seconds, public: true if current_account.nil?
-        set_ancestors
-        set_descendants
       end
 
       format.json do
@@ -77,8 +73,4 @@ class StatusesController < ApplicationController
   def redirect_to_original
     redirect_to ActivityPub::TagManager.instance.url_for(@status.reblog) if @status.reblog?
   end
-
-  def set_referrer_policy_header
-    response.headers['Referrer-Policy'] = 'origin' unless @status.distributable?
-  end
 end