module RuboCop::Cop::SpaceBeforePunctuation

def each_missing_space(tokens)
  tokens.each_cons(2) do |token1, token2|
    next unless kind(token2)
    next unless space_missing?(token1, token2)
    next if space_required_after?(token1)
    pos_before_punctuation = range_between(token1.end_pos,
                                           token2.begin_pos)
    yield token2, pos_before_punctuation
  end
end

def investigate(processed_source)
  each_missing_space(processed_source.tokens) do |token, pos_before|
    add_offense(pos_before, location: pos_before,
                            message: format(MSG, token: kind(token)))
  end
end

def space_missing?(token1, token2)
  token1.line == token2.line && token2.begin_pos > token1.end_pos
end

def space_required_after?(token)
  token.left_curly_brace? && space_required_after_lcurly?
end

def space_required_after_lcurly?
  cfg = config.for_cop('Layout/SpaceInsideBlockBraces')
  style = cfg['EnforcedStyle'] || 'space'
  style == 'space'
end