#!/usr/bin/env ruby

require 'openssl'

config_dirs = [
  "/media/persistent/certbot",
  "/media/persistent/certs/letsencrypt",
]

config_dirs.each do |config_dir|
  next unless Dir.exists?(config_dir)
  (Dir.entries("#{config_dir}/live/") - [".", ".."]).each do |site|
    next unless File.directory?("#{config_dir}/live/#{site}")
    cert = File.read("#{config_dir}/live/#{site}/cert.pem")
    x509 = OpenSSL::X509::Certificate.new(cert)
    days = (x509.not_after - Time.now) / 60 / 60 / 24
    sanitized_site = site.gsub(/[^a-zA-Z0-9]/, '_')
    puts "certbot,site=#{sanitized_site} days_remaining=#{days}"
  end
end