class RuboCop::Cop::Layout::SpaceAroundMethodCallOperator

def check_space(begin_pos, end_pos)
  return if end_pos <= begin_pos
  range = range_between(begin_pos, end_pos)
  return unless range.source.match?(SPACES_REGEXP)
  add_offense(range) { |corrector| corrector.remove(range) }
end

def check_space_after_dot(node)
  dot_pos = node.loc.dot.end_pos
  selector_pos =
    # `Proc#call` shorthand syntax
    if node.method?(:call) && !node.loc.selector
      node.loc.begin.begin_pos
    else
      node.loc.selector.begin_pos
    end
  check_space(dot_pos, selector_pos)
end

def check_space_after_double_colon(node)
  double_colon_pos = node.loc.double_colon.end_pos
  name_pos = node.loc.name.begin_pos
  check_space(double_colon_pos, name_pos)
end

def check_space_before_dot(node)
  receiver_pos = node.receiver.source_range.end_pos
  dot_pos = node.loc.dot.begin_pos
  check_space(receiver_pos, dot_pos)
end

def on_const(node)
  return unless node.loc?(:double_colon)
  check_space_after_double_colon(node)
end

def on_send(node)
  return unless node.dot? || node.safe_navigation?
  check_space_before_dot(node)
  check_space_after_dot(node)
end