1 files changed, 38 insertions, 0 deletions
diff --git a/app/graphql/resolvers/board_lists_resolver.rb b/app/graphql/resolvers/board_lists_resolver.rb
new file mode 100644
index 00000000000..f8d62ba86af
--- /dev/null
+++ b/app/graphql/resolvers/board_lists_resolver.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+module Resolvers
+  class BoardListsResolver < BaseResolver
+    include Gitlab::Graphql::Authorize::AuthorizeResource
+
+    type Types::BoardListType, null: true
+
+    alias_method :board, :object
+
+    def resolve(lookahead: nil)
+      authorize!(board)
+
+      lists = board_lists
+
+      if load_preferences?(lookahead)
+        List.preload_preferences_for_user(lists, context[:current_user])
+      end
+
+      Gitlab::Graphql::Pagination::OffsetActiveRecordRelationConnection.new(lists)
+    end
+
+    private
+
+    def board_lists
+      service = Boards::Lists::ListService.new(board.resource_parent, context[:current_user])
+      service.execute(board, create_default_lists: false)
+    end
+
+    def authorized_resource?(board)
+      Ability.allowed?(context[:current_user], :read_list, board)
+    end
+
+    def load_preferences?(lookahead)
+      lookahead&.selection(:edges)&.selection(:node)&.selects?(:collapsed)
+    end
+  end
+end