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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) 2011 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 templates from other loaders.
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*
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* @package twig
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* @author Fabien Potencier <fabien@symfony.com>
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*/
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class Twig_Loader_Chain implements Twig_LoaderInterface
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{
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protected $loaders;
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/**
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* Constructor.
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*
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* @param Twig_LoaderInterface[] $loaders An array of loader instances
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*/
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public function __construct(array $loaders = array())
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{
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$this->loaders = array();
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foreach ($loaders as $loader) {
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$this->addLoader($loader);
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}
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}
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/**
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* Adds a loader instance.
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*
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* @param Twig_LoaderInterface $loader A Loader instance
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*/
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public function addLoader(Twig_LoaderInterface $loader)
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{
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$this->loaders[] = $loader;
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}
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/**
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* Gets the source code of a template, given its name.
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*
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* @param string $name The name of the template to load
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*
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* @return string The template source code
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*/
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public function getSource($name)
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{
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foreach ($this->loaders as $loader) {
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try {
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return $loader->getSource($name);
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} catch (Twig_Error_Loader $e) {
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}
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}
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throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
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}
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/**
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* Gets the cache key to use for the cache for a given template name.
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*
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* @param string $name The name of the template to load
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*
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* @return string The cache key
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*/
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public function getCacheKey($name)
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{
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foreach ($this->loaders as $loader) {
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try {
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return $loader->getCacheKey($name);
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} catch (Twig_Error_Loader $e) {
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}
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}
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throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
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}
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/**
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* Returns true if the template is still fresh.
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*
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* @param string $name The template name
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* @param timestamp $time The last modification time of the cached template
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*/
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public function isFresh($name, $time)
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{
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foreach ($this->loaders as $loader) {
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try {
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return $loader->isFresh($name, $time);
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} catch (Twig_Error_Loader $e) {
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}
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}
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throw new Twig_Error_Loader(sprintf('Template "%s" is not defined.', $name));
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}
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}
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