Add customizable user roles (#18641)

* Add customizable user roles

* Various fixes and improvements

* Add migration for old settings and fix tootctl role management

app/serializers/initial_state_serializer.rb

@@ -6,6 +6,7 @@ class InitialStateSerializer < ActiveModel::Serializer
              :languages
 
   has_one :push_subscription, serializer: REST::WebPushSubscriptionSerializer
+  has_one :role, serializer: REST::RoleSerializer
 
   def meta
     store = {
@@ -19,7 +20,6 @@ class InitialStateSerializer < ActiveModel::Serializer
       repository: Mastodon::Version.repository,
       source_url: Mastodon::Version.source_url,
       version: Mastodon::Version.to_s,
-      invites_enabled: Setting.min_invite_role == 'user',
       limited_federation_mode: Rails.configuration.x.whitelist_mode,
       mascot: instance_presenter.mascot&.file&.url,
       profile_directory: Setting.profile_directory,
@@ -39,7 +39,6 @@ class InitialStateSerializer < ActiveModel::Serializer
       store[:advanced_layout]   = object.current_account.user.setting_advanced_layout
       store[:use_blurhash]      = object.current_account.user.setting_use_blurhash
       store[:use_pending_items] = object.current_account.user.setting_use_pending_items
-      store[:is_staff]          = object.current_account.user.staff?
       store[:trends]            = Setting.trends && object.current_account.user.setting_trends
       store[:crop_images]       = object.current_account.user.setting_crop_images
     else

app/serializers/rest/credential_account_serializer.rb

@@ -3,6 +3,8 @@
 class REST::CredentialAccountSerializer < REST::AccountSerializer
   attributes :source
 
+  has_one :role, serializer: REST::RoleSerializer
+
   def source
     user = object.user
 
@@ -15,4 +17,8 @@ class REST::CredentialAccountSerializer < REST::AccountSerializer
       follow_requests_count: FollowRequest.where(target_account: object).limit(40).count,
     }
   end
+
+  def role
+    object.user_role
+  end
 end

app/serializers/rest/instance_serializer.rb

@@ -93,7 +93,7 @@ class REST::InstanceSerializer < ActiveModel::Serializer
   end
 
   def invites_enabled
-    Setting.min_invite_role == 'user'
+    UserRole.everyone.can?(:invite_users)
   end
 
   private

app/serializers/rest/role_serializer.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+class REST::RoleSerializer < ActiveModel::Serializer
+  attributes :id, :name, :permissions, :color, :highlighted
+
+  def id
+    object.id.to_s
+  end
+
+  def permissions
+    object.computed_permissions.to_s
+  end
+end