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<?php |
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namespace Bee4\RobotsTxt; |
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use Bee4\RobotsTxt\Exception\DuplicateRuleException; |
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/** |
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* Class Rules |
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* Represent a collection of Rules |
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* |
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* @copyright Bee4 2015 |
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* @author Stephane HULARD <[email protected]> |
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*/ |
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class Rules |
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{ |
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const DEFAULT_UA = '*'; |
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/** |
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* The collection of rules |
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* @var array |
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*/ |
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protected $collection = []; |
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/** |
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* Default rule used if robots.txt is empty |
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* @var Rule |
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*/ |
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private $defaultRule; |
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public function __construct() |
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{ |
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$this->defaultRule = new Rule(); |
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$this->add(self::DEFAULT_UA, $this->defaultRule); |
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} |
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/** |
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* Add a new rule to the collection |
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* @param string $userAgent |
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* @param Rule $rule |
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* @return Rules |
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*/ |
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public function add($userAgent, Rule $rule) |
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{ |
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$userAgent = $this->handleUa($userAgent); |
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if (isset($this->collection[$userAgent]) && |
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$this->collection[$userAgent] !== $this->defaultRule ) { |
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throw (new DuplicateRuleException( |
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'You can\'t add 2 rules for the same UserAgent' |
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)) |
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->setRule($rule) |
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->setUserAgent($userAgent); |
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} |
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$this->collection[$userAgent] = $rule; |
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return $this; |
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} |
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/** |
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* Check if the URL match for the given UA or not |
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* @param string $userAgent |
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* @param string $url |
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* @return boolean |
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*/ |
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public function match($userAgent, $url) |
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{ |
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if (($rule = $this->get($userAgent)) === null) { |
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return false; |
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} |
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return $rule->match($url); |
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} |
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/** |
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* Retrieve rules for a given UA |
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* @param string $userAgent |
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* @return null|Rule |
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*/ |
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public function get($userAgent) |
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{ |
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$item = null; |
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$iterator = new \ArrayIterator($this->collection); |
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iterator_apply( |
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$iterator, |
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function (\ArrayIterator $iterator, $userAgent) use (&$item) { |
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if ($iterator->key() != Rules::DEFAULT_UA && |
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preg_match($iterator->key(), $userAgent) === 1 ) { |
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$item = $iterator->current(); |
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return false; |
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} |
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return true; |
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}, |
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[$iterator, $userAgent] |
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); |
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return $item!==null? |
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$item: |
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(isset($this->collection[self::DEFAULT_UA])? |
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$this->collection[self::DEFAULT_UA]: |
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null); |
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} |
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/** |
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* Update the UA to make a valid regexp |
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* @param string $userAgent |
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* @return string |
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*/ |
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private function handleUa($userAgent) |
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{ |
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if ($userAgent == self::DEFAULT_UA) { |
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return $userAgent; |
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} |
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return '/^'.preg_quote($userAgent).'.*/i'; |
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} |
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} |
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bee4 /
robots.txt
