Speaking Timer from my training

speaking_timer.rb

# encoding: utf-8

require 'talks'

class Hash
  ##
  # Cascading Fetch
  #
  # Tries to fetch provided symbols one after the other
  # and return fallback non-symbol value otherwise
  def cascading_fetch(*args)
    args.each do |field|
    
      if field.instance_of? Symbol
        begin
          return fetch(field)
        rescue
        end
      else
        return field
      end
      
    end
  end
  
end

class Timer
  def initialize(opts={})
    @steps      = opts.cascading_fetch(:steps, :step, 8)
    @duration   = opts.cascading_fetch(:duration_in_seconds, :duration, 120)
    @reason     = opts.cascading_fetch(:reason, :cause, 'training')
  end
  
  def run
    start_message
    step_messages
    end_message
  end
  
  def start_message
    say "You are starting your #{ @reason } with #{ @steps } steps, #{ @duration.to_s.split('').join(', ') }, seconds each."
  end
  
  def step_messages
    steps = (1..@steps).map do |i|
      if i == 1
        "Begin with position 1"
      elsif i == @steps
        "Proceed to the last position, number #{i}"
      else
        "Proceed to position #{i}"
      end
    end
    
    steps.each do |step_message|
      say step_message
      sleep @duration
    end
  end
  
  def end_message
    say "You have finished your #{ @reason }. Well done! I encourage you to repeat it, as soon as you feel good about it!"
  end
  
  def say(message)
    Talks.say message
  end
  
end

timer = Timer.new(steps: 8, duration: 180, reason: 'meditation')
timer.run