Viewing file:  ChainLoader.php (3.01 KB) -rw-r--r--
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<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Twig\Loader;
use Twig\Error\LoaderError;
use Twig\Source;
/**
* Loads templates from other loaders.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
final class ChainLoader implements LoaderInterface
{
private $hasSourceCache = [];
private $loaders = [];
/**
* @param LoaderInterface[] $loaders
*/
public function __construct(array $loaders = [])
{
foreach ($loaders as $loader) {
$this->addLoader($loader);
}
}
public function addLoader(LoaderInterface $loader): void
{
$this->loaders[] = $loader;
$this->hasSourceCache = [];
}
/**
* @return LoaderInterface[]
*/
public function getLoaders(): array
{
return $this->loaders;
}
public function getSourceContext(string $name): Source
{
$exceptions = [];
foreach ($this->loaders as $loader) {
if (!$loader->exists($name)) {
continue;
}
try {
return $loader->getSourceContext($name);
} catch (LoaderError $e) {
$exceptions[] = $e->getMessage();
}
}
throw new LoaderError(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
}
public function exists(string $name): bool
{
if (isset($this->hasSourceCache[$name])) {
return $this->hasSourceCache[$name];
}
foreach ($this->loaders as $loader) {
if ($loader->exists($name)) {
return $this->hasSourceCache[$name] = true;
}
}
return $this->hasSourceCache[$name] = false;
}
public function getCacheKey(string $name): string
{
$exceptions = [];
foreach ($this->loaders as $loader) {
if (!$loader->exists($name)) {
continue;
}
try {
return $loader->getCacheKey($name);
} catch (LoaderError $e) {
$exceptions[] = \get_class($loader).': '.$e->getMessage();
}
}
throw new LoaderError(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
}
public function isFresh(string $name, int $time): bool
{
$exceptions = [];
foreach ($this->loaders as $loader) {
if (!$loader->exists($name)) {
continue;
}
try {
return $loader->isFresh($name, $time);
} catch (LoaderError $e) {
$exceptions[] = \get_class($loader).': '.$e->getMessage();
}
}
throw new LoaderError(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' ('.implode(', ', $exceptions).')' : ''));
}
}
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