the whole shebang

vendor/symfony/dom-crawler/Symfony/Component/DomCrawler/Link.php

@@ -0,0 +1,197 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DomCrawler;
+
+/**
+ * Link represents an HTML link (an HTML a tag).
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @api
+ */
+class Link
+{
+    /**
+     * @var \DOMNode A \DOMNode instance
+     */
+    protected $node;
+    /**
+     * @var string The method to use for the link
+     */
+    protected $method;
+    /**
+     * @var string The URI of the page where the link is embedded (or the base href)
+     */
+    protected $currentUri;
+
+    /**
+     * Constructor.
+     *
+     * @param \DOMNode $node       A \DOMNode instance
+     * @param string   $currentUri The URI of the page where the link is embedded (or the base href)
+     * @param string   $method     The method to use for the link (get by default)
+     *
+     * @throws \InvalidArgumentException if the node is not a link
+     *
+     * @api
+     */
+    public function __construct(\DOMNode $node, $currentUri, $method = 'GET')
+    {
+        if (!in_array(strtolower(substr($currentUri, 0, 4)), array('http', 'file'))) {
+            throw new \InvalidArgumentException(sprintf('Current URI must be an absolute URL ("%s").', $currentUri));
+        }
+
+        $this->setNode($node);
+        $this->method = $method ? strtoupper($method) : null;
+        $this->currentUri = $currentUri;
+    }
+
+    /**
+     * Gets the node associated with this link.
+     *
+     * @return \DOMNode A \DOMNode instance
+     */
+    public function getNode()
+    {
+        return $this->node;
+    }
+
+    /**
+     * Gets the method associated with this link.
+     *
+     * @return string The method
+     *
+     * @api
+     */
+    public function getMethod()
+    {
+        return $this->method;
+    }
+
+    /**
+     * Gets the URI associated with this link.
+     *
+     * @return string The URI
+     *
+     * @api
+     */
+    public function getUri()
+    {
+        $uri = trim($this->getRawUri());
+
+        // absolute URL?
+        if (null !== parse_url($uri, PHP_URL_SCHEME)) {
+            return $uri;
+        }
+
+        // empty URI
+        if (!$uri) {
+            return $this->currentUri;
+        }
+
+        // only an anchor
+        if ('#' === $uri[0]) {
+            $baseUri = $this->currentUri;
+            if (false !== $pos = strpos($baseUri, '#')) {
+                $baseUri = substr($baseUri, 0, $pos);
+            }
+
+            return $baseUri.$uri;
+        }
+
+        // only a query string
+        if ('?' === $uri[0]) {
+            $baseUri = $this->currentUri;
+
+            // remove the query string from the current uri
+            if (false !== $pos = strpos($baseUri, '?')) {
+                $baseUri = substr($baseUri, 0, $pos);
+            }
+
+            return $baseUri.$uri;
+        }
+
+        // absolute URL with relative schema
+        if (0 === strpos($uri, '//')) {
+            return preg_replace('#^([^/]*)//.*$#', '$1', $this->currentUri).$uri;
+        }
+
+        $baseUri = preg_replace('#^(.*?//[^/]*)(?:\/.*)?$#', '$1', $this->currentUri);
+
+        // absolute path
+        if ('/' === $uri[0]) {
+            return $baseUri.$uri;
+        }
+
+        // relative path
+        $path = parse_url(substr($this->currentUri, strlen($baseUri)), PHP_URL_PATH);
+        $path = $this->canonicalizePath(substr($path, 0, strrpos($path, '/')).'/'.$uri);
+
+        return $baseUri.('' === $path || '/' !== $path[0] ? '/' : '').$path;
+    }
+
+    /**
+     * Returns raw uri data.
+     *
+     * @return string
+     */
+    protected function getRawUri()
+    {
+        return $this->node->getAttribute('href');
+    }
+
+    /**
+     * Returns the canonicalized URI path (see RFC 3986, section 5.2.4)
+     *
+     * @param string $path URI path
+     *
+     * @return string
+     */
+    protected function canonicalizePath($path)
+    {
+        if ('' === $path || '/' === $path) {
+            return $path;
+        }
+
+        if ('.' === substr($path, -1)) {
+            $path = $path.'/';
+        }
+
+        $output = array();
+
+        foreach (explode('/', $path) as $segment) {
+            if ('..' === $segment) {
+                array_pop($output);
+            } elseif ('.' !== $segment) {
+                array_push($output, $segment);
+            }
+        }
+
+        return implode('/', $output);
+    }
+
+    /**
+     * Sets current \DOMNode instance.
+     *
+     * @param \DOMNode $node A \DOMNode instance
+     *
+     * @throws \LogicException If given node is not an anchor
+     */
+    protected function setNode(\DOMNode $node)
+    {
+        if ('a' != $node->nodeName) {
+            throw new \LogicException(sprintf('Unable to click on a "%s" tag.', $node->nodeName));
+        }
+
+        $this->node = $node;
+    }
+}