# encoding: utf-8

module Rubocop
  module Cop
    class Blocks < Cop
      MULTI_LINE_MSG = 'Avoid using {...} for multi-line blocks.'
      SINGLE_LINE_MSG = 'Prefer {...} over do...end for single-line blocks.'

      def on_block(node)
        block_length = Util.block_length(node)
        block_begin = node.loc.begin.source

        if block_length > 0 && block_begin == '{'
          add_offence(:convention, node.loc.line, MULTI_LINE_MSG)
        elsif block_length == 0 && block_begin != '{'
          add_offence(:convention, node.loc.line, SINGLE_LINE_MSG)
        end

        super
      end
    end
  end
end