debian-mirror-gitlab/app/services/boards/lists/move_service.rb

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module Boards
module Lists
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class MoveService < BaseService
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def execute(list)
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@board = list.board
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@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
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attr_reader :board, :old_position, :new_position
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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