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<?php |
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namespace BramR\TorExits; |
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use BramR\TorExits\Parser\ParserInterface; |
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use BramR\TorExits\Cache\IpListCacheInterface; |
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/** |
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* Class IpList, contains a list of IPv4 addresses |
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*/ |
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class IpList implements \Countable, \Iterator, \Serializable, \JsonSerializable |
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{ |
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protected $position = 0; |
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protected $addresses = array(); |
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protected $addressInList = array(); |
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/** |
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* @param array $addresses of IPv4 addresses as string |
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*/ |
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public function __construct(array $addresses = array()) |
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{ |
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$this->position = 0; |
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if (!empty($addresses)) { |
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$this->add($addresses); |
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} |
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} |
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/** |
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* fromParser, factory method for creating an ipList from parser |
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* |
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* @param ParserInterface $parser |
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* @return IpList |
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*/ |
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public static function fromParser(ParserInterface $parser) |
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{ |
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return $parser->parse(); |
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} |
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/** |
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* fromParserWithCache, factory method for creating an ipList from parser while |
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* checking a cache layer first. |
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* If the cache layer is not filled and a nonempty list is returned by parser then |
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* the cache is set with that list |
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* |
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* @param ParserInterface $parser |
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* @param IpListCacheInterface $cache |
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* @return IpList |
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*/ |
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public static function fromParserWithCache(ParserInterface $parser, IpListCacheInterface $cache) |
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{ |
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$ipList = $cache->fetch(); |
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if (!is_null($ipList)) { |
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return $ipList; |
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} else { |
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$ipList = self::fromParser($parser); |
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if (!empty($ipList)) { |
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if (!$cache->store($ipList)) { |
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throw new \RuntimeException('Failed storing new tor exit node list in cache.'); |
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} |
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} |
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return $ipList; |
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} |
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} |
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/** |
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* add addresses to an IpList |
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* Ignores invalid IPv4 Addresses |
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* |
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* @param mixed $addresses (array|string) |
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* @return IpList |
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*/ |
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public function add($addresses) |
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{ |
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if (!is_array($addresses)) { |
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$addresses = (array) $addresses; |
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} |
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foreach ($addresses as $address) { |
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$ip = ip2long($address); |
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if ($ip && !isset($this->addressInList[$ip])) { |
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$this->addresses[] = $ip; |
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$this->addressInList[$ip] = true; |
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} |
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} |
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return $this; |
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} |
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/** |
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* fromArray load an IpList from an array |
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* Ignores invalid IPv4 Addresses |
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* |
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* @param mixed $addresses (array|string) |
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* @return IpList |
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*/ |
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public function remove($addresses) |
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{ |
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if (!is_array($addresses)) { |
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$addresses = (array) $addresses; |
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} |
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foreach ($addresses as $address) { |
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$ip = ip2long($address); |
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if ($ip && isset($this->addressInList[$ip])) { |
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unset($this->addressInList[$ip]); |
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if (false !== $key = array_search($ip, $this->addresses)) { |
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unset($this->addresses[$key]); |
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} |
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} |
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} |
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return $this; |
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} |
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/** |
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* toArray, convert to array |
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* @return array (with IPv4 addresses as strings) |
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*/ |
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public function toArray() |
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{ |
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$result = array(); |
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foreach ($this->addresses as $ip) { |
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$result[] = long2ip($ip); |
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} |
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return $result; |
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} |
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/** |
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* contains, an ip address |
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* @param string $address ip |
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* @return boolean |
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*/ |
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public function contains($address) |
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{ |
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$ip = ip2long($address); |
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return $ip ? isset($this->addressInList[$ip]) : false; |
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} |
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/** |
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* doesNotContain, an ip address (for semantics) |
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* @param string $address ip |
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* @return boolean |
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*/ |
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public function doesNotContain($address) |
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{ |
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return !$this->contains($address); |
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} |
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/** |
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* isEmpty |
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* @return boolean |
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*/ |
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public function isEmpty() |
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{ |
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return empty($this->addresses); |
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} |
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public function clear() |
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{ |
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$this->position = 0; |
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$this->addresses = array(); |
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$this->addressInList = array(); |
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return $this; |
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} |
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//Implement Countable |
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public function count() |
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{ |
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return count($this->addresses); |
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} |
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//Implement Iterator |
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public function rewind() |
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{ |
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$this->position = 0; |
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} |
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public function current() |
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{ |
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return long2ip($this->addresses[$this->position]); |
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} |
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public function key() |
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{ |
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return $this->position; |
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} |
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public function next() |
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{ |
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++$this->position; |
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} |
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public function valid() |
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{ |
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return isset($this->addresses[$this->position]); |
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} |
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public function sort() |
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{ |
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sort($this->addresses); |
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return $this; |
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} |
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//Implement JsonSerializable |
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public function jsonSerialize() |
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{ |
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return $this->toArray(); |
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} |
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//Implement Serializable |
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public function serialize() |
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{ |
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return serialize(array( |
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$this->addresses, |
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$this->addressInList |
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)); |
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} |
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public function unserialize($data) |
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{ |
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list( |
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$this->addresses, |
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$this->addressInList |
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) = unserialize($data); |
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} |
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} |
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