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<?php |
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namespace BramR\TorExits\Cache; |
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use BramR\TorExits\IpList; |
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/** |
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* Class IpListJsonCache |
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*/ |
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class IpListJsonCache implements IpListCacheInterface |
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{ |
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const DEFAULT_LOCATION = '/tmp/tor-exits.cache.json'; |
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const DEFAULT_TTL = 7200; |
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protected $location; |
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protected $ttl; |
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/** |
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* Setter for location |
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* |
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* @param string $location |
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* @return IpListJsonCache |
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*/ |
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public function setLocation($location) |
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{ |
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$this->location = $location; |
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return $this; |
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} |
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/** |
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* Setter for ttl |
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* |
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* @param int $ttl |
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* @return IpListJsonCache |
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*/ |
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public function setTtl($ttl) |
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{ |
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if (intval($ttl) < 1) { |
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throw new \InvalidArgumentException('Invalid ttl.'); |
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} |
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$this->ttl = $ttl; |
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return $this; |
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} |
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/** |
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* Getter for location |
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* |
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* return string |
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*/ |
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public function getLocation() |
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{ |
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return $this->location ? $this->location : self::DEFAULT_LOCATION; |
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} |
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/** |
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* Getter for location |
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* |
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* return int |
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*/ |
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public function getTtl() |
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{ |
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return $this->ttl ? $this->ttl : self::DEFAULT_TTL; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function store(IpList $ipList, $ttl = null) |
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{ |
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if (is_null($ttl)) { |
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$ttl = $this->getTtl(); |
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} |
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$store = new \stdClass(); |
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$store->iplist = $ipList; |
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$store->expires = $this->calculateExpiration($ttl)->format('c'); |
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if (!is_writable(dirname($this->getLocation())) || |
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(file_exists($this->getLocation()) && !is_writable($this->getLocation())) |
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) { |
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return false; |
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} |
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return (bool) file_put_contents($this->getLocation(), json_encode($store)); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function fetch() |
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{ |
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if (!is_readable($this->getLocation())) { |
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return null; |
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} |
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$data = json_decode(file_get_contents($this->getLocation())); |
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if (!isset($data->iplist) || !isset($data->expires)) { |
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return null; |
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} |
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if (new \DateTime($data->expires) < new \DateTime()) { |
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return null; |
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} |
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return new IpList($data->iplist); |
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} |
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/** |
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* calculateExpiration, calculate expiration DateTime based on ttl |
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* |
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* @param int|null $ttl |
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* @return DateTime |
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*/ |
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protected function calculateExpiration($ttl = null) |
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{ |
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if (!is_int($ttl) && $ttl < 1) { |
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throw new \InvalidArgumentException('Invalid ttl.'); |
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} |
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2 |
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return new \DateTime(sprintf('+%d seconds', $ttl)); |
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} |
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} |
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bramr /
tor-exits
