1 files changed, 38 insertions, 0 deletions
diff --git a/app/services/concerns/group_linkable.rb b/app/services/concerns/group_linkable.rb
new file mode 100644
index 00000000000..43d10e01a4a
--- /dev/null
+++ b/app/services/concerns/group_linkable.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+module GroupLinkable
+  extend ActiveSupport::Concern
+
+  def execute
+    return error('Not Found', 404) unless valid_to_create?
+
+    build_link
+
+    if link.save
+      after_successful_save
+      success(link: link)
+    else
+      error(link.errors.full_messages.to_sentence, 409)
+    end
+  end
+
+  private
+
+  attr_reader :shared_with_group, :link
+
+  def sharing_allowed?
+    sharing_outside_hierarchy_allowed? || within_hierarchy?
+  end
+
+  def sharing_outside_hierarchy_allowed?
+    !root_ancestor.prevent_sharing_groups_outside_hierarchy
+  end
+
+  def within_hierarchy?
+    root_ancestor.self_and_descendants_ids.include?(shared_with_group.id)
+  end
+
+  def after_successful_save
+    setup_authorizations
+  end
+end