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<?php |
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namespace yswery\DNS\Resolver; |
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use yswery\DNS\ClassEnum; |
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use yswery\DNS\RecordTypeEnum; |
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use yswery\DNS\ResourceRecord; |
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use yswery\DNS\UnsupportedTypeException; |
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class JsonResolver extends AbstractResolver |
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{ |
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/** |
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* @var string |
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*/ |
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protected $defaultClass = ClassEnum::INTERNET; |
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/** |
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* @var int |
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*/ |
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protected $defaultTtl; |
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/** |
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* JsonResolver constructor. |
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* |
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* @param array $files |
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* @param int $defaultTtl |
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* |
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* @throws UnsupportedTypeException |
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*/ |
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public function __construct(array $files, $defaultTtl = 300) |
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{ |
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$this->isAuthoritative = true; |
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$this->allowRecursion = false; |
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$this->defaultTtl = $defaultTtl; |
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foreach ($files as $file) { |
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$zone = json_decode(file_get_contents($file), true); |
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$resourceRecords = $this->isLegacyFormat($zone) ? $this->processLegacyZone($zone) : $this->processZone($zone); |
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$this->addZone($resourceRecords); |
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} |
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} |
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/** |
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* @param array $zone |
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* |
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* @return ResourceRecord[] |
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* |
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* @throws UnsupportedTypeException |
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*/ |
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protected function processZone(array $zone): array |
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{ |
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$parent = rtrim($zone['domain'], '.').'.'; |
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$defaultTtl = $zone['default-ttl']; |
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$rrs = $zone['resource-records']; |
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$resourceRecords = []; |
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foreach ($rrs as $rr) { |
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$name = $rr['name'] ?? $parent; |
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$class = isset($rr['class']) ? ClassEnum::getClassFromName($rr['class']) : $this->defaultClass; |
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$resourceRecords[] = (new ResourceRecord()) |
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->setName($this->handleName($name, $parent)) |
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->setClass($class) |
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->setType($type = RecordTypeEnum::getTypeIndex($rr['type'])) |
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->setTtl($rr['ttl'] ?? $defaultTtl) |
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->setRdata($this->extractRdata($rr, $type, $parent)); |
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} |
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return $resourceRecords; |
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} |
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/** |
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* Determine if a $zone is in the legacy format. |
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* |
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* @param array $zone |
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* |
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* @return bool |
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*/ |
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protected function isLegacyFormat(array $zone): bool |
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{ |
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$keys = array_map(function ($value) { |
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return strtolower($value); |
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}, array_keys($zone)); |
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return |
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(false === array_search('domain', $keys, true)) || |
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(false === array_search('resource-records', $keys, true)); |
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} |
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/** |
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* @param array $zones |
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* |
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* @return ResourceRecord[] |
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*/ |
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protected function processLegacyZone(array $zones): array |
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{ |
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$resourceRecords = []; |
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foreach ($zones as $domain => $types) { |
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$domain = rtrim($domain, '.').'.'; |
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foreach ($types as $type => $data) { |
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$data = (array) $data; |
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$type = RecordTypeEnum::getTypeIndex($type); |
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foreach ($data as $rdata) { |
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$resourceRecords[] = (new ResourceRecord()) |
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->setName($domain) |
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->setType($type) |
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->setClass($this->defaultClass) |
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->setTtl($this->defaultTtl) |
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->setRdata($rdata); |
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} |
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} |
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} |
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return $resourceRecords; |
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} |
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} |
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samuelwilliams /
PHP-DNS-SERVER
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