Add: #348 新規登録の上限人数 (#527)

* Add: #348 新規登録の上限人数

* Fix test

* Fix test

* Wip

* Fix test

* Add invite support

* Wip

* Fix test

* Fix test

* Fix test

app/serializers/initial_state_serializer.rb

@@ -3,6 +3,7 @@
 class InitialStateSerializer < ActiveModel::Serializer
   include RoutingHelper
   include DtlHelper
+  include RegistrationLimitationHelper
 
   attributes :meta, :compose, :accounts,
              :media_attachments, :settings,
@@ -122,7 +123,8 @@ class InitialStateSerializer < ActiveModel::Serializer
       locale: I18n.locale,
       mascot: instance_presenter.mascot&.file&.url,
       profile_directory: Setting.profile_directory,
-      registrations_open: Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode,
+      registrations_open: Setting.registrations_mode != 'none' && !reach_registrations_limit? && !Rails.configuration.x.single_user_mode,
+      registrations_reach_limit: Setting.registrations_mode != 'none' && reach_registrations_limit?,
       repository: Mastodon::Version.repository,
       search_enabled: Chewy.enabled?,
       single_user_mode: Rails.configuration.x.single_user_mode,

app/serializers/node_info/serializer.rb

@@ -3,6 +3,7 @@
 class NodeInfo::Serializer < ActiveModel::Serializer
   include RoutingHelper
   include KmyblueCapabilitiesHelper
+  include RegistrationLimitationHelper
 
   attributes :version, :software, :protocols, :services, :usage, :open_registrations, :metadata
 
@@ -35,7 +36,7 @@ class NodeInfo::Serializer < ActiveModel::Serializer
   end
 
   def open_registrations
-    Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
+    Setting.registrations_mode != 'none' && !reach_registrations_limit? && !Rails.configuration.x.single_user_mode
   end
 
   def metadata

app/serializers/rest/instance_serializer.rb

@@ -9,6 +9,7 @@ class REST::InstanceSerializer < ActiveModel::Serializer
 
   include RoutingHelper
   include KmyblueCapabilitiesHelper
+  include RegistrationLimitationHelper
 
   attributes :domain, :title, :version, :source_url, :description,
              :usage, :thumbnail, :languages, :configuration,
@@ -110,6 +111,7 @@ class REST::InstanceSerializer < ActiveModel::Serializer
     {
       enabled: registrations_enabled?,
       approval_required: Setting.registrations_mode == 'approved',
+      limit_reached: Setting.registrations_mode != 'none' && reach_registrations_limit?,
       message: registrations_enabled? ? nil : registrations_message,
       url: ENV.fetch('SSO_ACCOUNT_SIGN_UP', nil),
     }
@@ -118,7 +120,7 @@ class REST::InstanceSerializer < ActiveModel::Serializer
   private
 
   def registrations_enabled?
-    Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
+    Setting.registrations_mode != 'none' && !reach_registrations_limit? && !Rails.configuration.x.single_user_mode
   end
 
   def registrations_message

app/serializers/rest/v1/instance_serializer.rb

@@ -3,6 +3,7 @@
 class REST::V1::InstanceSerializer < ActiveModel::Serializer
   include RoutingHelper
   include KmyblueCapabilitiesHelper
+  include RegistrationLimitationHelper
 
   attributes :uri, :title, :short_description, :description, :email,
              :version, :urls, :stats, :thumbnail,
@@ -109,7 +110,7 @@ class REST::V1::InstanceSerializer < ActiveModel::Serializer
   end
 
   def registrations
-    Setting.registrations_mode != 'none' && !Rails.configuration.x.single_user_mode
+    Setting.registrations_mode != 'none' && !reach_registrations_limit? && !Rails.configuration.x.single_user_mode
   end
 
   def approval_required