1 files changed, 28 insertions, 0 deletions
diff --git a/app/graphql/resolvers/group_milestones_resolver.rb b/app/graphql/resolvers/group_milestones_resolver.rb
new file mode 100644
index 00000000000..8d34cea4fa1
--- /dev/null
+++ b/app/graphql/resolvers/group_milestones_resolver.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module Resolvers
+  class GroupMilestonesResolver < MilestonesResolver
+    argument :include_descendants, GraphQL::BOOLEAN_TYPE,
+             required: false,
+             description: 'Also return milestones in all subgroups and subprojects'
+
+    private
+
+    def parent_id_parameters(args)
+      return { group_ids: parent.id } unless args[:include_descendants].present?
+
+      {
+        group_ids: parent.self_and_descendants.public_or_visible_to_user(current_user).select(:id),
+        project_ids: group_projects.with_issues_or_mrs_available_for_user(current_user)
+      }
+    end
+
+    def group_projects
+      GroupProjectsFinder.new(
+        group: parent,
+        current_user: current_user,
+        options: { include_subgroups: true }
+      ).execute
+    end
+  end
+end