Footwork Trainer for Fencer

footwork_trainer.rb

#!/usr/bin/env ruby
# encoding: UTF-8

# Footwork trainer for fencer
# for Mac OS X

class Footwork
  attr_accessor :name, :weight, :duration
  def initialize(attrs = {})
    attrs.each do |k, v|
      send("#{k}=", v)
    end
  end

  def say
    puts name
    system "say", name
    sleep duration
  end
end

class Trainer
  class << self
    attr_accessor :footworks, :total_weight, :weight_table

    def initialize_weight_table
      lowerbound = 0.0
      @weight_table = {}
      @footworks.each do |f|
        range = lowerbound...(lowerbound + f.weight)
        @weight_table[range] = f
        lowerbound += f.weight
      end
    end

    def say
      select.say
    end

    def select
      f = rand(total_weight)
      weight_table.find{|k, v| k.include?(f)}[1]
    end
  end

  @footworks = [
    {name: "marche", weight: 5.0, duration: 0.5},
    {name: "marche deux", weight: 2.0, duration: 1.0},
    {name: "marche trois", weight: 1.0, duration: 2.0},

    {name: "rompe", weight: 4.0, duration: 0.5},
    {name: "rompe deux", weight: 2.0, duration: 1.0},
    {name: "rompe trois", weight: 1.0, duration: 2.0},

    {name: "bond avant", weight: 1.0, duration: 0.5},
    {name: "bond arriere", weight: 1.0, duration: 0.5},
    {name: "appel", weight: 1.0, duration: 0.5},

    {name: "allongez le bras", weight: 1.0, duration: 0.0},
    {name: "coup droit", weight: 1.0, duration: 0.5},
    {name: "fandez vous", weight: 3.0, duration: 1.0},
    {name: "balestra", weight: 1.0, duration: 0.5}
  ].map{|fw|
    Footwork.new(fw)
  }
  @total_weight = @footworks.inject(0.0) {|total, f| total + f.weight }

  initialize_weight_table
end

loop { Trainer.say }