class Facter::Resolvers::RedHatRelease

def build_fact_list(output)
  output_strings = output.split('release')
  output_strings.map!(&:strip)
  version_codename = output_strings[1].split(' ')
  @fact_list[:name] = name(output_strings[0])
  @fact_list[:version] = version_codename[0]&.strip
  codename = version_codename[1]&.strip
  @fact_list[:codename] = codename ? codename.gsub(/[()]/, '') : nil
  @fact_list[:identifier] = identifier(@fact_list[:name])
end

def identifier(name)
  identifier = name.strip.downcase
  identifier = 'rhel' if @fact_list[:name].strip.casecmp('Red Hat Enterprise Linux')
  identifier
end

def name(name)
  name.strip.split(' ')[0..1].join
end

def post_resolve(fact_name)
  @fact_list.fetch(fact_name) { read_redhat_release(fact_name) }
end

def read_redhat_release(fact_name)
  output = Util::FileHelper.safe_read('/etc/redhat-release', nil)
  return @fact_list[fact_name] = nil if output.nil?
  build_fact_list(output)
  @fact_list[fact_name]
end