52 lines
1.4 KiB
Ruby
52 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
|