czas.rb

#!/usr/local/bin/ruby


# $ ruby czas.rb 
# Czas pracy (domyslnie 8h): 
# Na ktora przyszedles do pracy (ex: 8:00):8:25
# Wolny za: 3 hours, 1 minute and 9 seconds


# gem install rails --no-ri --no-rdoc
# gem install duration

require 'rubygems'
require 'activesupport'
require 'duration'
require 'pp'

get_h_m = lambda do |line|
    h,m = line.chomp.split(/:/)
    h = !h ? 8 : h.to_i
    m = !m ? 0 : m.to_i
    return h,m
end

print "Czas pracy (domyslnie 8h): "
time_work_h,time_work_m = get_h_m.call(gets)

print "Na ktora przyszedles do pracy (ex: 8:00):"
time_h,time_m = get_h_m.call(gets)

start_work = Time.now.beginning_of_day + time_h.hours + time_m.minutes

if start_work > Time.now
    puts "Blas"
    exit 1
end

puts "Wolny za: #{Duration.new((Time.now.beginning_of_day + time_h.hours + time_work_h.hours + time_work_m.minutes) - Time.now)}"