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<?php |
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/* |
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* This file is part of Badcow DNS Library. |
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* |
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* (c) Samuel Williams <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Badcow\DNS; |
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use Badcow\DNS\Rdata\CNAME; |
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use Badcow\DNS\Rdata\MX; |
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use Badcow\DNS\Rdata\AAAA; |
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use Badcow\DNS\Rdata\RdataInterface; |
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use Badcow\DNS\Rdata\SOA; |
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use Badcow\DNS\Ip\Toolbox; |
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class ZoneBuilder |
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{ |
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/** |
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* @param Zone $zone |
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* |
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* @return string |
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*/ |
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public static function build(Zone $zone): string |
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{ |
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$master = '$ORIGIN '.$zone->getName().PHP_EOL; |
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if (null !== $zone->getDefaultTtl()) { |
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$master .= '$TTL '.$zone->getDefaultTtl().PHP_EOL; |
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} |
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foreach ($zone as $rr) { |
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if (null !== $rr->getRdata()) { |
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$master .= preg_replace('/\s+/', ' ', trim(sprintf('%s %s %s %s %s', |
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$rr->getName(), |
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$rr->getTtl(), |
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$rr->getClass(), |
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$rr->getType(), |
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$rr->getRdata()->output() |
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))); |
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} |
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if (null !== $rr->getComment()) { |
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$master .= '; '.$rr->getComment(); |
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} |
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$master .= PHP_EOL; |
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} |
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return $master; |
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} |
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/** |
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* Fills out all of the data of each resource record. The function will add the parent domain to all non-qualified |
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* sub-domains, replace '@' with the zone name, ensure the class and TTL are on each record. |
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* |
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* @param Zone $zone |
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*/ |
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public static function fillOutZone(Zone $zone) |
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{ |
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$class = $zone->getClass(); |
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foreach ($zone as &$rr) { |
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$rr->setName(self::fullyQualify($rr->getName(), $zone->getName())); |
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$rr->setTtl($rr->getTtl() ?? $zone->getDefaultTtl()); |
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$rr->setClass($class); |
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$rdata = $rr->getRdata(); |
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static::fillOutRdata($rdata, $zone); |
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} |
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} |
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/** |
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* Add the parent domain to the sub-domain if the sub-domain if it is not fully qualified. |
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* |
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* @param string|null $subDomain |
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* @param string $parent |
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* |
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* @return string |
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*/ |
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private static function fullyQualify(?string $subDomain, string $parent): string |
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{ |
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if ('@' === $subDomain || null === $subDomain) { |
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return $parent; |
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} |
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if ('.' !== substr($subDomain, -1, 1)) { |
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return $subDomain.'.'.$parent; |
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} |
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return $subDomain; |
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} |
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/** |
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* @param RdataInterface $rdata |
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* @param Zone $zone |
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*/ |
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private static function fillOutRdata(RdataInterface $rdata, Zone $zone): void |
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{ |
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$mappings = [ |
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SOA::class => 'static::fillOutSoa', |
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Cname::class => 'static::fillOutCname', |
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MX::class => 'static::fillOutMx', |
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AAAA::class => 'static::fillOutAaaa', |
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]; |
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foreach ($mappings as $class => $callable) { |
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if (!is_callable($callable)) { |
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throw new \InvalidArgumentException(sprintf('The argument "%s" is not callable.', $callable)); |
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} |
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if ($rdata instanceof $class) { |
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call_user_func($callable, $rdata, $zone); |
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} |
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} |
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} |
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/** |
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* @param SOA $rdata |
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* @param Zone $zone |
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*/ |
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private static function fillOutSoa(SOA $rdata, Zone $zone): void |
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{ |
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$rdata->setMname(self::fullyQualify($rdata->getMname(), $zone->getName())); |
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$rdata->setRname(self::fullyQualify($rdata->getRname(), $zone->getName())); |
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} |
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/** |
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* @param CNAME $rdata |
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* @param Zone $zone |
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*/ |
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private static function fillOutCname(Cname $rdata, Zone $zone): void |
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{ |
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$rdata->setTarget(self::fullyQualify($rdata->getTarget(), $zone->getName())); |
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} |
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/** |
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* @param MX $rdata |
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* @param Zone $zone |
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*/ |
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private static function fillOutMx(MX $rdata, Zone $zone): void |
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{ |
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$rdata->setExchange(self::fullyQualify($rdata->getExchange(), $zone->getName())); |
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} |
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/** |
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* @param AAAA $rdata |
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* @param Zone $zone |
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*/ |
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private static function fillOutAaaa(AAAA $rdata, Zone $zone): void |
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{ |
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$rdata->setAddress(Toolbox::expandIpv6($rdata->getAddress())); |
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} |
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} |
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Badcow /
DNS
Loading history...
Let’s assume you have a class which uses late-static binding:
}
The code above will run fine in your PHP runtime. However, if you now create a sub-class and call the
getSomeVariable()on that sub-class, you will receive a runtime error:In the case above, it makes sense to update
SomeClassto useselfinstead: