52 lines
1.4 KiB
Ruby
52 lines
1.4 KiB
Ruby
module Boards
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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
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@new_position = params[:position]
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return false unless list.movable?
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return false unless valid_move?
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list.with_lock do
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reorder_intermediate_lists
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update_list_position(list)
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end
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end
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private
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attr_reader :board, :old_position, :new_position
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def valid_move?
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new_position.present? && new_position != old_position &&
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new_position >= 0 && new_position < board.lists.movable.size
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end
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def reorder_intermediate_lists
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if old_position < new_position
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decrement_intermediate_lists
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else
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increment_intermediate_lists
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end
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end
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def decrement_intermediate_lists
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board.lists.movable.where('position > ?', old_position)
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.where('position <= ?', new_position)
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.update_all('position = position - 1')
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end
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def increment_intermediate_lists
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board.lists.movable.where('position >= ?', new_position)
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.where('position < ?', old_position)
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.update_all('position = position + 1')
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end
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def update_list_position(list)
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list.update_attribute(:position, new_position)
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end
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end
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end
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end
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