Create basic non-EE NamespaceSettings::UpdateService

app/services/namespace_settings/update_service.rb

+# frozen_string_literal: true
+
+module NamespaceSettings
+  class UpdateService
+    include ::Gitlab::Allowable
+
+    attr_reader :current_user, :group, :settings_params
+
+    def initialize(current_user, group, settings)
+      @current_user = current_user
+      @group = group
+      @settings_params = settings
+    end
+
+    def execute
+      if group.namespace_settings
+        group.namespace_settings.attributes = settings_params
+      else
+        group.build_namespace_settings(settings_params)
+      end
+    end
+  end
+end
+
+NamespaceSettings::UpdateService.prepend_if_ee('EE::NamespaceSettings::UpdateService')

ee/app/services/ee/groups/update_service.rb

@@ -116,7 +116,7 @@ module EE
         settings_params = params.slice(:prevent_forking_outside_group)
         params.delete(:prevent_forking_outside_group)
 
-        NamespaceSettings::UpdateService.new(current_user, group, settings_params).execute
+        ::NamespaceSettings::UpdateService.new(current_user, group, settings_params).execute
       end
 
       def log_audit_event

ee/app/services/ee/namespace_settings/update_service.rb

@@ -2,44 +2,37 @@
 
 module EE
   # This class is responsible for updating the namespace settings of a specific group.
-
+  #
   module NamespaceSettings
-    class UpdateService
-      include ::Gitlab::Allowable
-
-      def initialize(current_user, group, settings)
-        @current_user = current_user
-        @group = group
-        @settings_params = settings
-      end
+    module UpdateService
+      extend ::Gitlab::Utils::Override
 
+      override :execute
       def execute
-        unless valid?
-          group.errors.add(:prevent_forking_outside_group, s_('GroupSettings|Prevent forking setting was not saved'))
+        unless can_update_prevent_forking?
+          group.errors.add(
+            :prevent_forking_outside_group,
+            s_('GroupSettings|Prevent forking setting was not saved')
+          )
+
           return
         end
 
-        if group.namespace_settings
-          group.namespace_settings.attributes = settings_params
-        else
-          group.build_namespace_settings(settings_params)
-        end
+        super
       end
 
       private
 
-      attr_reader :current_user, :group, :settings_params
+      def can_update_prevent_forking?
+        return true unless settings_params.key?(:prevent_forking_outside_group)
 
-      def valid?
-        if settings_params.key?(:prevent_forking_outside_group)
-          can_update_prevent_forking?
-        else
+        if can?(current_user, :change_prevent_group_forking, group)
           true
-        end
-      end
+        else
+          settings_params.delete(:prevent_forking_outside_group)
 
-      def can_update_prevent_forking?
-        can?(current_user, :change_prevent_group_forking, group)
+          false
+        end
       end
     end
   end

ee/spec/services/ee/namespace_settings/update_service_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe EE::NamespaceSettings::UpdateService do
   let(:group) { create(:group) }
   let(:user) { create(:user) }
 
-  subject { described_class.new(user, group, params).execute }
+  subject { NamespaceSettings::UpdateService.new(user, group, params).execute }
 
   describe '#execute' do
     before do

spec/services/namespace_settings/update_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe NamespaceSettings::UpdateService do
+  let(:user) { create(:user) }
+  let(:group) { create(:group) }
+  let(:settings) { {} }
+
+  subject(:service) { described_class.new(user, group, settings) }
+
+  describe "#execute" do
+    context "group has no namespace_settings" do
+      it "builds out a new namespace_settings record" do
+        expect do
+          service.execute
+        end.to change { NamespaceSetting.count }.by(1)
+      end
+    end
+
+    context "group has a namespace_settings" do
+      before do
+        create(:namespace_settings, namespace: group)
+
+        service.execute
+      end
+
+      it "doesn't create a new namespace_setting record" do
+        expect do
+          service.execute
+        end.not_to change { NamespaceSetting.count }
+      end
+    end
+  end
+end