/**
* {@inheritdoc}
*/
public function parse($zoneName, $zone)
{
$this->zone->setZoneName($zoneName);
foreach (Interpreter::expand($zone) as $line) {
/** @var Line $line */
$this->zone->addResourceRecord($this->lineToRr($line));
}
return $zone;
}
/**
* Validates that the zone meets
* RFC-1035 especially that:
* 1) 5.2.1 All RRs in the file should be of the same class.
* 2) 5.2.2 Exactly one SOA RR should be present at the top of the zone.
*
* @param ZoneInterface $zone
*
* @throws ZoneException
*
* @return bool
*/
public static function validate(ZoneInterface $zone)
{
$number_soa = 0;
$number_ns = 0;
$classes = [];
foreach ($zone->getResourceRecords() as $rr) {
/* @var $rr ResourceRecordInterface */
if (SoaRdata::TYPE === $rr->getRdata()->getType()) {
$number_soa += 1;
}
if (NsRdata::TYPE === $rr->getRdata()->getType()) {
$number_ns += 1;
}
if (null !== $rr->getClass()) {
$classes[$rr->getClass()] = null;
}
}
if ($number_soa !== 1) {
throw new ZoneException(sprintf('There must be exactly one SOA record, %s given.', $number_soa));
}
if ($number_ns < 1) {
throw new ZoneException(sprintf('There must be at least one NS record, %s given.', $number_ns));
}
if (1 !== ($c = count($classes))) {
throw new ZoneException(sprintf('There must be exactly one type of class, %s given.', $c));
}
return true;
}