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<?php
/*
* This file is part of Twig.
*
* (c) 2009 Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Loads template from the filesystem.
*
* @package twig
* @author Fabien Potencier <fabien@symfony.com>
*/
class Twig_Loader_Filesystem implements Twig_LoaderInterface
{
protected $paths;
protected $cache;
/**
* Constructor.
*
* @param string|array $paths A path or an array of paths where to look for templates
*/
public function __construct($paths)
{
$this->setPaths($paths);
}
/**
* Returns the paths to the templates.
*
* @return array The array of paths where to look for templates
*/
public function getPaths()
{
return $this->paths;
}
/**
* Sets the paths where templates are stored.
*
* @param string|array $paths A path or an array of paths where to look for templates
*/
public function setPaths($paths)
{
if (!is_array($paths)) {
$paths = array($paths);
}
$this->paths = array();
foreach ($paths as $path) {
$this->addPath($path);
}
}
/**
* Adds a path where templates are stored.
*
* @param string $path A path where to look for templates
*/
public function addPath($path)
{
// invalidate the cache
$this->cache = array();
if (!is_dir($path)) {
throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
}
$this->paths[] = $path;
}
/**
* Gets the source code of a template, given its name.
*
* @param string $name The name of the template to load
*
* @return string The template source code
*/
public function getSource($name)
{
return file_get_contents($this->findTemplate($name));
}
/**
* Gets the cache key to use for the cache for a given template name.
*
* @param string $name The name of the template to load
*
* @return string The cache key
*/
public function getCacheKey($name)
{
return $this->findTemplate($name);
}
/**
* Returns true if the template is still fresh.
*
* @param string $name The template name
* @param timestamp $time The last modification time of the cached template
*/
public function isFresh($name, $time)
{
return filemtime($this->findTemplate($name)) < $time;
}
protected function findTemplate($name)
{
// normalize name
$name = preg_replace('#/{2,}#', '/', strtr($name, '\\', '/'));
if (isset($this->cache[$name])) {
return $this->cache[$name];
}
$this->validateName($name);
foreach ($this->paths as $path) {
if (is_file($path.'/'.$name)) {
return $this->cache[$name] = $path.'/'.$name;
}
}
throw new Twig_Error_Loader(sprintf('Unable to find template "%s" (looked into: %s).', $name, implode(', ', $this->paths)));
}
protected function validateName($name)
{
if (false !== strpos($name, "\0")) {
throw new Twig_Error_Loader('A template name cannot contain NUL bytes.');
}
$parts = explode('/', $name);
$level = 0;
foreach ($parts as $part) {
if ('..' === $part) {
--$level;
} elseif ('.' !== $part) {
++$level;
}
if ($level < 0) {
throw new Twig_Error_Loader(sprintf('Looks like you try to load a template outside configured directories (%s).', $name));
}
}
}
}
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