| <?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).')' : '')); |
| } |
| } |