Ruby Brightnight #1 - Sokoban

sokoban.rb

require "matrix"
require "pry"

class Warehouse
  attr_reader :rows
  attr_reader :columns
  attr_reader :container

  UP = "u"
  DOWN = "d"
  LEFT = "l"
  RIGHT = "r"
  MOVES = [UP, DOWN, LEFT, RIGHT]

  CRATE = 9
  PERSON = 2
  WALL = 3
  SPACE = 0
  STORAGE = 8
  CRATE_ON_STORAGE = 4
  PERSON_ON_STORAGE = 5

  MAPPING = {
    PERSON => "@",
    WALL => "#",
    SPACE => " ",
    CRATE => "o",
    STORAGE => ".",
    CRATE_ON_STORAGE => "*",
    PERSON_ON_STORAGE => "+"
  }

  def initialize(rows=4, columns=4)
    @rows = rows + 2
    @columns = columns + 2
    @container = build_container
    @number_of_crates = 1
    @number_of_storage_bins = 1
  end

  def print
    0.upto(@rows - 1) do |row|
      v = @container.row(row)
      v.each do |col|
        Kernel.print "#{MAPPING[col]} "
      end
      puts ""
    end
    puts ""
  end

  def move(direction)
    if not valid_move?(direction)
      puts "#{direction} is an invalid move, try again!"
      puts ""
    end

    detect_wall(direction)
  end

  private

  def detect_wall(direction)

  end

  def valid_move?(direction)
    MOVES.include?(direction.downcase)
  end

  def build_container
    Matrix.build(@rows, @columns) { |row, col|
      if row == 0 or row == @rows - 1
        WALL
      elsif col == 0 or col == @columns - 1
        WALL
      elsif row == 1 and col == 1
        PERSON
      elsif row == 2 and col == 2
        STORAGE
      elsif row == 3 and col == 3
        CRATE
      else
        SPACE
      end
    }
  end
end

w = Warehouse.new(5,5)
w.print
puts "Your move: "
while input = gets.chomp
  puts "Your move: "
  exit if input == "exit"
  w.move(input)
  w.print
end

PERFECT JOB!