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<?php |
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namespace Zenstruck\CacheBundle\Url; |
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use Http\Client\HttpClient; |
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use Http\Message\MessageFactory; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Log\LoggerInterface; |
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use Psr\Log\LogLevel; |
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/** |
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* @author Kevin Bond <[email protected]> |
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*/ |
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class Crawler implements \Countable |
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{ |
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private $httpClient; |
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private $messageFactory; |
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private $logger; |
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private $urlProviders; |
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/** |
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* @param HttpClient $httpClient |
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* @param MessageFactory $messageFactory |
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* @param LoggerInterface $logger |
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* @param UrlProvider[] $urlProviders |
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*/ |
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public function __construct(HttpClient $httpClient, MessageFactory $messageFactory, LoggerInterface $logger = null, array $urlProviders = []) |
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{ |
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$this->httpClient = $httpClient; |
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$this->messageFactory = $messageFactory; |
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$this->logger = $logger; |
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$this->urlProviders = $urlProviders; |
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} |
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/** |
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* @param UrlProvider $provider |
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*/ |
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public function addUrlProvider(UrlProvider $provider) |
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{ |
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$this->urlProviders[] = $provider; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function count() |
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{ |
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$count = 0; |
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foreach ($this->urlProviders as $provider) { |
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$count += count($provider); |
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} |
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return $count; |
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} |
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/** |
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* @param callable $callback Response as first argument, calling URL as second |
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*/ |
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public function crawl(callable $callback = null) |
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{ |
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foreach ($this->getUrls() as $url) { |
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$response = $this->httpClient->sendRequest($this->messageFactory->createRequest('GET', $url)); |
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$this->log($response, $url); |
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if ($callback) { |
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$callback($response, $url); |
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} |
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} |
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} |
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/** |
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* @param ResponseInterface $response |
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* @param string $url |
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*/ |
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private function log(ResponseInterface $response, $url) |
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{ |
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if (null === $this->logger) { |
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return; |
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} |
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$status = $response->getStatusCode(); |
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$this->logger->log($status == 200 ? LogLevel::DEBUG : LogLevel::NOTICE, sprintf('[%s] %s', $status, $url)); |
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} |
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/** |
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* @return array |
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*/ |
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private function getUrls() |
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{ |
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$urls = []; |
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foreach ($this->urlProviders as $provider) { |
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$urls = array_merge($urls, $provider->getUrls()); |
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} |
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return $urls; |
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} |
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} |
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kbond /
ZenstruckCacheBundle
