script for pomodoro timer with tmux and Pomodoro-App

pomodoro.rb

#!/usr/bin/env ruby
#
# for use with ugol's pomodoro app (https://github.com/ugol/pomodoro) and tmux
# use applescript to set the time
# How to use it:

# 1. Open preferences from the pomodoro app
# 2. Choose script 
# 3. Set start, reset and end to: do shell script "/usr/local/bin/pomodoro reset"
# 4. set every 1 min to: do shell script "/usr/local/bin/pomodoro decrease"
# 5. in .tmux.conf set set -g status-right "#(date '+%H:%M') | #(~/bin/pomodoro time) min"

class Pomodoro
  TIME_FILE = File.expand_path('~/.pomodoro_left_time')
  attr_accessor :time_file

  def initialize(time_file=TIME_FILE)
    @time_file = time_file
  end

  def reset_timer(value=25)
    write_time_to_file(value-1)
  end

  def current_time
    read_time_from_file
  end

  def decrease(step=1)
    new_time = current_time-1
    write_time_to_file(new_time)
  end

  def read_time_from_file
    time = nil
    f = File.open(@time_file) do |f|
      time = f.read.to_i
    end
    time
  end

  def write_time_to_file(value)
    f = File.open(@time_file, "w") do |f|
      f.write(value)
    end
    value
  end
end

command = ARGV.shift || 'time'
p = Pomodoro.new
case command
when 'time'
  puts p.current_time
when 'decrease'
  p.decrease
when 'reset'
  p.reset_timer
end