1 files changed, 115 insertions, 0 deletions
diff --git a/phpBB/phpbb/filesystem.php b/phpBB/phpbb/filesystem.php
index 27cab48fb0..5d70b88a29 100644
--- a/phpBB/phpbb/filesystem.php
+++ b/phpBB/phpbb/filesystem.php
@@ -6,6 +6,9 @@
 * @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
 *
 */
+
+use Symfony\Component\HttpFoundation\Request;
+
 /**
 * @ignore
 */
@@ -20,6 +23,118 @@ if (!defined('IN_PHPBB'))
 */
 class phpbb_filesystem
 {
+	/** @var string */
+	protected $phpbb_root_path;
+
+	/** @var string */
+	protected $web_root_path;
+
+	/**
+	* Constructor
+	*
+	* @param string $phpbb_root_path
+	*/
+	public function __construct($phpbb_root_path)
+	{
+		$this->phpbb_root_path = $phpbb_root_path;
+	}
+
+	/**
+	* Get the phpBB root path
+	*
+	* @return string
+	*/
+	public function get_phpbb_root_path()
+	{
+		return $this->phpbb_root_path;
+	}
+
+	/**
+	* Update a path to the correct relative root path
+	*
+	* This replaces $phpbb_root_path . some_url with
+	*	get_web_root_path() . some_url OR if $phpbb_root_path
+	*	is not at the beginning of $path, just prepends the
+	*	web root path
+	*
+	* @param Request $symfony_request Symfony Request object
+	* @return string
+	*/
+	public function update_web_root_path($path, Request $symfony_request = null)
+	{
+		$web_root_path = $this->get_web_root_path($symfony_request);
+
+		if (strpos($path, $this->phpbb_root_path) === 0)
+		{
+			$path = substr($path, strlen($this->phpbb_root_path));
+		}
+
+		return $web_root_path . $path;
+	}
+
+	/**
+	* Get a relative root path from the current URL
+	*
+	* @param Request $symfony_request Symfony Request object
+	* @return string
+	*/
+	public function get_web_root_path(Request $symfony_request = null)
+	{
+		if ($symfony_request === null)
+		{
+			return $this->phpbb_root_path;
+		}
+
+		if (null !== $this->web_root_path)
+		{
+			return $this->web_root_path;
+		}
+
+		// Path info (e.g. /foo/bar)
+		$path_info = $this->clean_path($symfony_request->getPathInfo());
+
+		// Full request URI (e.g. phpBB/app.php/foo/bar)
+		$request_uri = $symfony_request->getRequestUri();
+
+		// Script name URI (e.g. phpBB/app.php)
+		$script_name = $symfony_request->getScriptName();
+
+		/*
+		* If the path info is empty (single /), then we're not using
+		*	a route like app.php/foo/bar
+		*/
+		if ($path_info === '/')
+		{
+			return $this->web_root_path = $this->phpbb_root_path;
+		}
+
+		// How many corrections might we need?
+		$corrections = substr_count($path_info, '/');
+
+		/*
+		* If the script name (e.g. phpBB/app.php) exists in the
+		*	requestUri (e.g. phpBB/app.php/foo/template), then we
+		*	are have a non-rewritten URL.
+		*/
+		if (strpos($request_uri, $script_name) === 0)
+		{
+			/*
+			* Append ../ to the end of the phpbb_root_path as many times
+			*	as / exists in path_info
+			*/
+			return $this->web_root_path = $this->phpbb_root_path . str_repeat('../', $corrections);
+		}
+
+		/*
+		* If we're here it means we're at a re-written path, so we must
+		*	correct the relative path for web URLs. We must append ../
+		*	to the end of the root path as many times as / exists in path_info
+		*	less one time (because the script, e.g. /app.php, doesn't exist in
+		*	the URL)
+		*/
+		return $this->web_root_path = $this->phpbb_root_path . str_repeat('../', $corrections - 1);
+	}
+
 	/**
 	* Eliminates useless . and .. components from specified path.
 	*