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Diffstat (limited to 'app/services/boards/lists/move_service.rb')
-rw-r--r-- | app/services/boards/lists/move_service.rb | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/app/services/boards/lists/move_service.rb b/app/services/boards/lists/move_service.rb new file mode 100644 index 00000000000..020ff69f4a7 --- /dev/null +++ b/app/services/boards/lists/move_service.rb @@ -0,0 +1,51 @@ +module Boards + module Lists + class MoveService < Boards::BaseService + def execute(list) + @old_position = list.position + @new_position = params[:position] + + return false unless list.movable? + return false unless valid_move? + + list.with_lock do + reorder_intermediate_lists + update_list_position(list) + end + end + + private + + attr_reader :old_position, :new_position + + def valid_move? + new_position.present? && new_position != old_position && + new_position >= 0 && new_position < board.lists.movable.size + end + + def reorder_intermediate_lists + if old_position < new_position + decrement_intermediate_lists + else + increment_intermediate_lists + end + end + + def decrement_intermediate_lists + board.lists.movable.where('position > ?', old_position) + .where('position <= ?', new_position) + .update_all('position = position - 1') + end + + def increment_intermediate_lists + board.lists.movable.where('position >= ?', new_position) + .where('position < ?', old_position) + .update_all('position = position + 1') + end + + def update_list_position(list) + list.update_attribute(:position, new_position) + end + end + end +end |