1 files changed, 37 insertions, 0 deletions
diff --git a/app/graphql/mutations/achievements/update_user_achievement_priorities.rb b/app/graphql/mutations/achievements/update_user_achievement_priorities.rb
new file mode 100644
index 00000000000..077b4810fdc
--- /dev/null
+++ b/app/graphql/mutations/achievements/update_user_achievement_priorities.rb
@@ -0,0 +1,37 @@
+# frozen_string_literal: true
+
+module Mutations
+  module Achievements
+    class UpdateUserAchievementPriorities < BaseMutation
+      graphql_name 'UserAchievementPrioritiesUpdate'
+
+      field :user_achievements,
+        [::Types::Achievements::UserAchievementType],
+        null: false,
+        description: 'Updated user achievements.'
+
+      argument :user_achievement_ids,
+        [::Types::GlobalIDType[::Achievements::UserAchievement]],
+        required: true,
+        description: 'Global IDs of the user achievements being prioritized, ' \
+                     'ordered from highest to lowest priority.'
+
+      def resolve(args)
+        user_achievements = args.delete(:user_achievement_ids).map { |id| find_object(id) }
+
+        user_achievements.each do |user_achievement|
+          unless Ability.allowed?(current_user, :update_owned_user_achievement, user_achievement)
+            raise_resource_not_available_error!
+          end
+        end
+
+        result = ::Achievements::UpdateUserAchievementPrioritiesService.new(current_user, user_achievements).execute
+        { user_achievements: result.payload, errors: result.errors }
+      end
+
+      def find_object(id)
+        ::Gitlab::Graphql::Lazy.force(GitlabSchema.object_from_id(id, expected_type: ::Achievements::UserAchievement))
+      end
+    end
+  end
+end