AoC#2

d2.rb

pinput = <<-PUZ
  # your input goes here
PUZ

sub = Submarine.new(pinput.split("\n"))
sub.go_brr
sub.where

class Submarine
  attr_reader :aim, :horizontal_pos, :vertical_pos, :movements

  def initialize(puzzle_input)
    @horizontal_pos = 0
    @vertical_pos = 0
    @aim = 0
    @movements = puzzle_input
  end

  def where
    @horizontal_pos * @vertical_pos
  end

  def go_brr
    @movements.each do |movement|
      (/(?<direction>\w+) (?<far>\d)/).match(movement) do |go|
        self.send("move_#{go[:direction]}", go[:far].to_i)
      end
    end
  end

  private

  def move_forward(x)
    @horizontal_pos += x
    @vertical_pos += (@aim * x)
  end

  def move_up(x)
    @aim -= x
  end

  def move_down(x)
    @aim += x
  end
end