gitlab-org--gitlab-foss/app/services/boards/lists/move_service.rb
2016-08-17 12:58:59 -03:00

51 lines
1.4 KiB
Ruby

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