1 files changed, 40 insertions, 0 deletions
diff --git a/app/services/projects/move_project_group_links_service.rb b/app/services/projects/move_project_group_links_service.rb
new file mode 100644
index 00000000000..dbeffd7dae9
--- /dev/null
+++ b/app/services/projects/move_project_group_links_service.rb
@@ -0,0 +1,40 @@
+# NOTE: This service cannot be used directly because it is part of a
+# a bigger process. Instead, use the service MoveAccessService which moves
+# project memberships, project group links, authorizations and refreshes
+# the authorizations if neccessary
+module Projects
+  class MoveProjectGroupLinksService < BaseMoveRelationsService
+    def execute(source_project, remove_remaining_elements: true)
+      return unless super
+
+      Project.transaction(requires_new: true) do
+        move_group_links
+        remove_remaining_project_group_links if remove_remaining_elements
+
+        success
+      end
+    end
+
+    private
+
+    def move_group_links
+      prepare_relation(non_existent_group_links)
+        .update_all(project_id: @project.id)
+    end
+
+    # Remove remaining project group links from source_project
+    def remove_remaining_project_group_links
+      source_project.reload.project_group_links.destroy_all
+    end
+
+    def group_links_in_target_project
+      @project.project_group_links.select(:group_id)
+    end
+
+    # Look for groups in source_project that are not in the target project
+    def non_existent_group_links
+      source_project.project_group_links
+                    .where.not(group_id: group_links_in_target_project)
+    end
+  end
+end