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<?php |
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namespace vipnytt\RobotsTxtParser\Client\Directives; |
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use vipnytt\RobotsTxtParser\Exceptions\ClientException; |
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use vipnytt\RobotsTxtParser\Parser\Directives\DirectiveParserCommons; |
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use vipnytt\RobotsTxtParser\Parser\Directives\SubDirectiveHandler; |
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use vipnytt\RobotsTxtParser\Parser\StatusCodeParser; |
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use vipnytt\RobotsTxtParser\Parser\UrlParser; |
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use vipnytt\RobotsTxtParser\RobotsTxtInterface; |
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class Checks implements RobotsTxtInterface |
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{ |
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use UrlParser; |
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use DirectiveParserCommons; |
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/** |
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* Base Uri |
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* @var string |
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*/ |
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private $base; |
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/** |
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* Status code |
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* @var int|null |
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*/ |
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private $statusCode; |
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/** |
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* Rules |
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* @var SubDirectiveHandler |
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*/ |
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private $handler; |
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/** |
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* DisAllowClient constructor. |
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* |
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* @param string $base |
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* @param int|null $statusCode |
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* @param SubDirectiveHandler $handler |
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*/ |
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public function __construct($base, $statusCode, SubDirectiveHandler $handler) |
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{ |
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$this->base = $base; |
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$this->statusCode = $statusCode; |
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$this->handler = $handler; |
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} |
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/** |
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* Check if URL is allowed to crawl |
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* |
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* @param string $url |
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* @return bool |
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*/ |
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public function isAllowed($url) |
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{ |
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return $this->check(self::DIRECTIVE_ALLOW, $url); |
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} |
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/** |
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* Check |
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* |
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* @param string $directive |
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* @param string $url - URL to check |
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* @return bool |
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* @throws ClientException |
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*/ |
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private function check($directive, $url) |
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{ |
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$directive = $this->validateDirective($directive, [self::DIRECTIVE_DISALLOW, self::DIRECTIVE_ALLOW]); |
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$url = $this->urlConvertToFull($url, $this->base); |
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if (!$this->isUrlApplicable([$url, $this->base])) { |
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throw new ClientException('URL belongs to a different robots.txt'); |
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} |
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$statusCodeParser = new StatusCodeParser($this->statusCode, parse_url($this->base, PHP_URL_SCHEME)); |
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$statusCodeParser->replaceUnofficial(); |
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if (($result = $statusCodeParser->check()) !== null) { |
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return $directive === $result; |
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} |
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if ($this->handler->visitTime()->client()->isVisitTime() === false) { |
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return $result === self::DIRECTIVE_DISALLOW; |
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} |
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$result = self::DIRECTIVE_ALLOW; |
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foreach ( |
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[ |
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self::DIRECTIVE_DISALLOW => $this->handler->disallow()->client(), |
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self::DIRECTIVE_ALLOW => $this->handler->allow()->client(), |
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] as $currentDirective => $ruleClient |
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) { |
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if ($ruleClient->affected($url)) { |
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$result = $currentDirective; |
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} |
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} |
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return $directive === $result; |
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} |
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/** |
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* Check if the URL belongs to current robots.txt |
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* |
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* @param string[] $urls |
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* @return bool |
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*/ |
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private function isUrlApplicable($urls) |
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{ |
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foreach ($urls as $url) { |
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$parsed = parse_url($url); |
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$parsed['port'] = is_int($port = parse_url($url, PHP_URL_PORT)) ? $port : getservbyname($parsed['scheme'], 'tcp'); |
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$assembled = $parsed['scheme'] . '://' . $parsed['host'] . ':' . $parsed['port']; |
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if (!isset($result)) { |
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$result = $assembled; |
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} elseif ($result !== $assembled) { |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Check if URL is disallowed to crawl |
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* |
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* @param string $url |
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* @return bool |
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*/ |
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public function isDisallowed($url) |
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{ |
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return $this->check(self::DIRECTIVE_DISALLOW, $url); |
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} |
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} |
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VIPnytt /
RobotsTxtParser
