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<?php
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/*
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* This file is part of Twig.
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*
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* (c) 2009 Fabien Potencier
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Loads template from the filesystem.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Twig_Loader_Filesystem implements Twig_LoaderInterface, Twig_ExistsLoaderInterface
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{
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protected $paths;
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protected $cache;
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/**
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* Constructor.
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*
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* @param string|array $paths A path or an array of paths where to look for templates
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*/
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public function __construct($paths = array())
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{
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if ($paths) {
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$this->setPaths($paths);
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}
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}
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/**
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* Returns the paths to the templates.
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*
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* @param string $namespace A path namespace
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*
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* @return array The array of paths where to look for templates
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*/
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public function getPaths($namespace = '__main__')
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{
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return isset($this->paths[$namespace]) ? $this->paths[$namespace] : array();
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}
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/**
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* Returns the path namespaces.
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*
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* The "__main__" namespace is always defined.
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*
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* @return array The array of defined namespaces
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*/
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public function getNamespaces()
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{
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return array_keys($this->paths);
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}
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/**
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* Sets the paths where templates are stored.
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*
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* @param string|array $paths A path or an array of paths where to look for templates
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* @param string $namespace A path namespace
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*/
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public function setPaths($paths, $namespace = '__main__')
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{
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if (!is_array($paths)) {
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$paths = array($paths);
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}
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$this->paths[$namespace] = array();
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foreach ($paths as $path) {
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$this->addPath($path, $namespace);
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}
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}
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/**
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* Adds a path where templates are stored.
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*
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* @param string $path A path where to look for templates
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* @param string $namespace A path name
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*
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* @throws Twig_Error_Loader
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*/
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public function addPath($path, $namespace = '__main__')
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{
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// invalidate the cache
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$this->cache = array();
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if (!is_dir($path)) {
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throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
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}
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$this->paths[$namespace][] = rtrim($path, '/\\');
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}
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/**
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* Prepends a path where templates are stored.
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*
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* @param string $path A path where to look for templates
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* @param string $namespace A path name
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*
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* @throws Twig_Error_Loader
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*/
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public function prependPath($path, $namespace = '__main__')
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{
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// invalidate the cache
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$this->cache = array();
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if (!is_dir($path)) {
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throw new Twig_Error_Loader(sprintf('The "%s" directory does not exist.', $path));
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}
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$path = rtrim($path, '/\\');
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if (!isset($this->paths[$namespace])) {
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$this->paths[$namespace][] = $path;
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} else {
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array_unshift($this->paths[$namespace], $path);
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function getSource($name)
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{
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return file_get_contents($this->findTemplate($name));
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}
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/**
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* {@inheritdoc}
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*/
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public function getCacheKey($name)
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{
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return $this->findTemplate($name);
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}
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/**
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* {@inheritdoc}
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*/
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public function exists($name)
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{
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$name = (string) $name;
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if (isset($this->cache[$name])) {
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return true;
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}
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try {
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$this->findTemplate($name);
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return true;
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} catch (Twig_Error_Loader $exception) {
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return false;
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function isFresh($name, $time)
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{
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return filemtime($this->findTemplate($name)) <= $time;
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}
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protected function findTemplate($name)
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{
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$name = (string) $name;
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// normalize name
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$name = preg_replace('#/{2,}#', '/', strtr($name, '\\', '/'));
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if (isset($this->cache[$name])) {
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return $this->cache[$name];
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}
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$this->validateName($name);
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$namespace = '__main__';
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if (isset($name[0]) && '@' == $name[0]) {
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if (false === $pos = strpos($name, '/')) {
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throw new Twig_Error_Loader(sprintf('Malformed namespaced template name "%s" (expecting "@namespace/template_name").', $name));
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}
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$namespace = substr($name, 1, $pos - 1);
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$name = substr($name, $pos + 1);
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}
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if (!isset($this->paths[$namespace])) {
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throw new Twig_Error_Loader(sprintf('There are no registered paths for namespace "%s".', $namespace));
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}
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foreach ($this->paths[$namespace] as $path) {
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if (is_file($path.'/'.$name)) {
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return $this->cache[$name] = $path.'/'.$name;
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}
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}
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throw new Twig_Error_Loader(sprintf('Unable to find template "%s" (looked into: %s).', $name, implode(', ', $this->paths[$namespace])));
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}
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protected function validateName($name)
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{
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if (false !== strpos($name, "\0")) {
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throw new Twig_Error_Loader('A template name cannot contain NUL bytes.');
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}
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$name = ltrim($name, '/');
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$parts = explode('/', $name);
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$level = 0;
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foreach ($parts as $part) {
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if ('..' === $part) {
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--$level;
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} elseif ('.' !== $part) {
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++$level;
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}
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if ($level < 0) {
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throw new Twig_Error_Loader(sprintf('Looks like you try to load a template outside configured directories (%s).', $name));
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}
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}
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}
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}
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