Labyrinth Explorer

#!/usr/bin/env ruby

require "uri"
require "nokogiri"
require "shellwords"

class State
  attr_reader :url, :path
  def initialize(url, path)
    url = URI.parse(url) if url.is_a?(String)
    @url = url
    @path = path
  end

  def text
    @text ||= game_area.text.strip.gsub("\r", "").gsub(/\n+N\n+W  E\n+S\n+Start Over/, "")
  end

  def links
    @links ||= game_area.css("a").map{|a| [a.text, @url+a[:href]]}.to_h
  end

  def doc
    @doc ||= fetch(url)
  end

private

  def game_area
    Nokogiri::HTML(doc[/<pre>(.*)<\/pre>/m, 1])
  end

  def fetch(url)
    `curl -s --cookie #{cookie.shellescape} #{url.to_s.shellescape}`
  end

  def cookie
    "THE COOKIE"
  end
end

class Adventure
  def initialize
    @states = {}
    @queue = []
  end

  def add!(url, path)
    return if @states[url]
    @states[url] = State.new(url, path)
    @queue << url
  end

  def explore!
    state = @states[@queue.shift]
    state.links.each do |direction, url|
      add! url, state.path + [direction]
    end
  end

  def start!
    start_url = "http://mirror.otp22.com/chal/yxunomei.php?reset=yes"
    add! start_url, []
    until @queue.empty?
      explore!
    end
    @states.each do |url, state|
      puts "State: #{state.path.join(" ")}"
      puts state.text
      puts ""
    end
    binding.pry
  end
end


Adventure.new.start!