1 files changed, 34 insertions, 0 deletions
diff --git a/app/services/boards/lists/destroy_service.rb b/app/services/boards/lists/destroy_service.rb
new file mode 100644
index 00000000000..0913a898abd
--- /dev/null
+++ b/app/services/boards/lists/destroy_service.rb
@@ -0,0 +1,34 @@
+module Boards
+  module Lists
+    class DestroyService
+      def initialize(project, params = {})
+        @board  = project.board
+        @params = params.dup
+      end
+
+      def execute
+        list.with_lock do
+          reorder_higher_lists
+          remove_list
+        end
+      end
+
+      private
+
+      attr_reader :board, :params
+
+      def list
+        @list ||= board.lists.find(params[:list_id])
+      end
+
+      def reorder_higher_lists
+        board.lists.where('position > ?',  list.position)
+             .update_all('position = position - 1')
+      end
+
+      def remove_list
+        list.destroy
+      end
+    end
+  end
+end