Add preference to hide following/followers lists (#7532)

* Add preference to hide following/followers lists

- Public pages
- ActivityPub collections (does not return pages but does give total)
- REST API (unless it's your own) (does not federate)

Fix #6901

* Add preference

* Add delegation

* Fix issue

* Fix issue

app/controllers/api/v1/accounts/follower_accounts_controller.rb

@@ -19,6 +19,8 @@ class Api::V1::Accounts::FollowerAccountsController < Api::BaseController
   end
 
   def load_accounts
+    return [] if @account.user_hides_network? && current_account.id != @account.id
+
     default_accounts.merge(paginated_follows).to_a
   end
 

app/controllers/api/v1/accounts/following_accounts_controller.rb

@@ -19,6 +19,8 @@ class Api::V1::Accounts::FollowingAccountsController < Api::BaseController
   end
 
   def load_accounts
+    return [] if @account.user_hides_network? && current_account.id != @account.id
+
     default_accounts.merge(paginated_follows).to_a
   end
 

app/controllers/follower_accounts_controller.rb

@@ -6,11 +6,15 @@ class FollowerAccountsController < ApplicationController
   def index
     respond_to do |format|
       format.html do
+        next if @account.user_hides_network?
+
         follows
         @relationships = AccountRelationshipsPresenter.new(follows.map(&:account_id), current_user.account_id) if user_signed_in?
       end
 
       format.json do
+        raise Mastodon::NotPermittedError if params[:page].present? && @account.user_hides_network?
+
         render json: collection_presenter,
                serializer: ActivityPub::CollectionSerializer,
                adapter: ActivityPub::Adapter,

app/controllers/following_accounts_controller.rb

@@ -6,11 +6,15 @@ class FollowingAccountsController < ApplicationController
   def index
     respond_to do |format|
       format.html do
+        next if @account.user_hides_network?
+
         follows
         @relationships = AccountRelationshipsPresenter.new(follows.map(&:target_account_id), current_user.account_id) if user_signed_in?
       end
 
       format.json do
+        raise Mastodon::NotPermittedError if params[:page].present? && @account.user_hides_network?
+
         render json: collection_presenter,
                serializer: ActivityPub::CollectionSerializer,
                adapter: ActivityPub::Adapter,

app/controllers/settings/preferences_controller.rb

@@ -44,6 +44,7 @@ class Settings::PreferencesController < ApplicationController
       :setting_system_font_ui,
       :setting_noindex,
       :setting_theme,
+      :setting_hide_network,
       notification_emails: %i(follow follow_request reblog favourite mention digest),
       interactions: %i(must_be_follower must_be_following)
     )