log alarms of rocket attacks on Israel using Ruby

redalarm.rb

#!/usr/bin/env ruby

require 'open-uri'
require 'json'

PKR_URL = 'http://www.oref.org.il/WarningMessages/alerts.json'

def to_json
  data = open(PKR_URL).read.force_encoding('utf-16').encode('utf-8')
  JSON.parse(data)
end

def to_log(&block)
  log = open('alarm.log', 'a+')
  yield log
  log.close
end

job = fork do
  while true do
    json = to_json
    unless json['data'].empty?
      json['data'].each do |idx|
        idx =~ /^([\p{hebrew}\s]+)(\d+)$/
        to_log do |log|
          log.puts "[#{Time.now.strftime('%D %T')} ] ישוב: #{$1} קוד: #{$2}"
        end
      end
    end

    sleep 1
  end
end

Process.detach(job)

nice