A quick ruby script for checking COVID-19 Vaccine in Fremont, California

fremont_covid_vaccine.rb

require 'rubygems'
require 'nokogiri'
require 'open-uri'

puts "COVID Vaccine Finder / Fremont, California"

page = Nokogiri::HTML(open(URL))
mDiv = "body > div > div.shadow-sm.p-3.mb-4.rounded > div:nth-child(8) > div"
bDiv = "button"

while true
  now = Time.now.strftime("%d/%m/%Y %H:%M")

  begin
    # If the COVID Vaccine site returns more than 7 buttons, this means
    # the vaccine has now expanded to another group and we should be notified
    # about it
    if page.css(mDiv).children.search(bDiv).size > 7
      puts "Vaccine now available for an 8th group! [#{now}]"

      begin
        # Attempt to call a nested method on a nokogiri child
        puts page.css(mDiv).children.search(bDiv).last.children[0].text
      rescue
        puts "...failed to parse the possible 8th child element for an expanded group"
      end

      system("terminal-notifier -title '💉🦠' -message 'Check Hallers! #{now}' -open #{URL}")

      puts "\n\n"
    else
      puts "No expanded group found #{now}"
    end
  rescue => error
    puts "Fatal error on parsing just the buttons, please investigate further"
    puts error
  end

  # Let's sleep and check every hour (3600)? Or maybe every 15 minutes
  sleep 900
end