Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\DomCrawler;
Chris@0: 
Chris@0: /**
Chris@0:  * Any HTML element that can link to an URI.
Chris@0:  *
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  */
Chris@0: abstract class AbstractUriElement
Chris@0: {
Chris@0:     /**
Chris@0:      * @var \DOMElement
Chris@0:      */
Chris@0:     protected $node;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var string The method to use for the element
Chris@0:      */
Chris@0:     protected $method;
Chris@0: 
Chris@0:     /**
Chris@0:      * @var string The URI of the page where the element is embedded (or the base href)
Chris@0:      */
Chris@0:     protected $currentUri;
Chris@0: 
Chris@0:     /**
Chris@0:      * @param \DOMElement $node       A \DOMElement instance
Chris@0:      * @param string      $currentUri The URI of the page where the link is embedded (or the base href)
Chris@0:      * @param string      $method     The method to use for the link (get by default)
Chris@0:      *
Chris@0:      * @throws \InvalidArgumentException if the node is not a link
Chris@0:      */
Chris@0:     public function __construct(\DOMElement $node, $currentUri, $method = 'GET')
Chris@0:     {
Chris@17:         if (!\in_array(strtolower(substr($currentUri, 0, 4)), ['http', 'file'])) {
Chris@0:             throw new \InvalidArgumentException(sprintf('Current URI must be an absolute URL ("%s").', $currentUri));
Chris@0:         }
Chris@0: 
Chris@0:         $this->setNode($node);
Chris@0:         $this->method = $method ? strtoupper($method) : null;
Chris@0:         $this->currentUri = $currentUri;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the node associated with this link.
Chris@0:      *
Chris@0:      * @return \DOMElement A \DOMElement instance
Chris@0:      */
Chris@0:     public function getNode()
Chris@0:     {
Chris@0:         return $this->node;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the method associated with this link.
Chris@0:      *
Chris@0:      * @return string The method
Chris@0:      */
Chris@0:     public function getMethod()
Chris@0:     {
Chris@0:         return $this->method;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Gets the URI associated with this link.
Chris@0:      *
Chris@0:      * @return string The URI
Chris@0:      */
Chris@0:     public function getUri()
Chris@0:     {
Chris@0:         $uri = trim($this->getRawUri());
Chris@0: 
Chris@0:         // absolute URL?
Chris@0:         if (null !== parse_url($uri, PHP_URL_SCHEME)) {
Chris@0:             return $uri;
Chris@0:         }
Chris@0: 
Chris@0:         // empty URI
Chris@0:         if (!$uri) {
Chris@0:             return $this->currentUri;
Chris@0:         }
Chris@0: 
Chris@0:         // an anchor
Chris@0:         if ('#' === $uri[0]) {
Chris@0:             return $this->cleanupAnchor($this->currentUri).$uri;
Chris@0:         }
Chris@0: 
Chris@0:         $baseUri = $this->cleanupUri($this->currentUri);
Chris@0: 
Chris@0:         if ('?' === $uri[0]) {
Chris@0:             return $baseUri.$uri;
Chris@0:         }
Chris@0: 
Chris@0:         // absolute URL with relative schema
Chris@0:         if (0 === strpos($uri, '//')) {
Chris@0:             return preg_replace('#^([^/]*)//.*$#', '$1', $baseUri).$uri;
Chris@0:         }
Chris@0: 
Chris@0:         $baseUri = preg_replace('#^(.*?//[^/]*)(?:\/.*)?$#', '$1', $baseUri);
Chris@0: 
Chris@0:         // absolute path
Chris@0:         if ('/' === $uri[0]) {
Chris@0:             return $baseUri.$uri;
Chris@0:         }
Chris@0: 
Chris@0:         // relative path
Chris@17:         $path = parse_url(substr($this->currentUri, \strlen($baseUri)), PHP_URL_PATH);
Chris@0:         $path = $this->canonicalizePath(substr($path, 0, strrpos($path, '/')).'/'.$uri);
Chris@0: 
Chris@0:         return $baseUri.('' === $path || '/' !== $path[0] ? '/' : '').$path;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns raw URI data.
Chris@0:      *
Chris@0:      * @return string
Chris@0:      */
Chris@0:     abstract protected function getRawUri();
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns the canonicalized URI path (see RFC 3986, section 5.2.4).
Chris@0:      *
Chris@0:      * @param string $path URI path
Chris@0:      *
Chris@0:      * @return string
Chris@0:      */
Chris@0:     protected function canonicalizePath($path)
Chris@0:     {
Chris@0:         if ('' === $path || '/' === $path) {
Chris@0:             return $path;
Chris@0:         }
Chris@0: 
Chris@0:         if ('.' === substr($path, -1)) {
Chris@0:             $path .= '/';
Chris@0:         }
Chris@0: 
Chris@17:         $output = [];
Chris@0: 
Chris@0:         foreach (explode('/', $path) as $segment) {
Chris@0:             if ('..' === $segment) {
Chris@0:                 array_pop($output);
Chris@0:             } elseif ('.' !== $segment) {
Chris@0:                 $output[] = $segment;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return implode('/', $output);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Sets current \DOMElement instance.
Chris@0:      *
Chris@0:      * @param \DOMElement $node A \DOMElement instance
Chris@0:      *
Chris@0:      * @throws \LogicException If given node is not an anchor
Chris@0:      */
Chris@0:     abstract protected function setNode(\DOMElement $node);
Chris@0: 
Chris@0:     /**
Chris@0:      * Removes the query string and the anchor from the given uri.
Chris@0:      *
Chris@0:      * @param string $uri The uri to clean
Chris@0:      *
Chris@0:      * @return string
Chris@0:      */
Chris@0:     private function cleanupUri($uri)
Chris@0:     {
Chris@0:         return $this->cleanupQuery($this->cleanupAnchor($uri));
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Remove the query string from the uri.
Chris@0:      *
Chris@0:      * @param string $uri
Chris@0:      *
Chris@0:      * @return string
Chris@0:      */
Chris@0:     private function cleanupQuery($uri)
Chris@0:     {
Chris@0:         if (false !== $pos = strpos($uri, '?')) {
Chris@0:             return substr($uri, 0, $pos);
Chris@0:         }
Chris@0: 
Chris@0:         return $uri;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Remove the anchor from the uri.
Chris@0:      *
Chris@0:      * @param string $uri
Chris@0:      *
Chris@0:      * @return string
Chris@0:      */
Chris@0:     private function cleanupAnchor($uri)
Chris@0:     {
Chris@0:         if (false !== $pos = strpos($uri, '#')) {
Chris@0:             return substr($uri, 0, $pos);
Chris@0:         }
Chris@0: 
Chris@0:         return $uri;
Chris@0:     }
Chris@0: }