require 'rubygems'
require 'nokogiri'
require 'rest-client'
require 'mail'

options = { :address              => "smtp.gmail.com",
            :port                 => 587,
            :domain               => 'localhost',
            :user_name            => 'pavel.shebalkou@gmail.com',
            :password             => '********',
            :authentication       => 'plain',
            :enable_starttls_auto => true }

Mail.defaults do
  delivery_method :smtp, options
end

def execution_loop(period)
  loop do
    before = Time.now
    yield
    interval = period - (Time.now - before)
    sleep(interval) if interval > 0
  end
end

def read_html(link)
  page = Nokogiri::HTML(RestClient.get(link))
end

def get_status(page)
  status = page.css('.profile_time_lv').text
end

def send_email(status)
  if status.include?("заходил") || status.include?("сети")
    puts "Вадим #{status}"

  else
    Mail.deliver do
      to 'elizeoban@gmail.com'
      from 'pavel.shebalkou@gmail.com'
      subject 'vk_online_checker_notification'
      body 'Nell is now online'
    end
    puts 'Вадим сейчас Online'
  end
end

#puts 'Введите ссылку на пользователя'
link = "https://vk.com/psychohell"


execution_loop(60) do
  html_page = read_html(link)
  status = get_status(html_page)
  send_email(status)
end