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TemplateLocator.php
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TemplateLocator.php
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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Bundle\FrameworkBundle\Templating\Loader;
use Symfony\Component\Config\FileLocatorInterface;
use Symfony\Component\Templating\TemplateReferenceInterface;
/**
* TemplateLocator locates templates in bundles.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class TemplateLocator implements FileLocatorInterface
{
protected $locator;
protected $cache;
private $cacheHits = [];
/**
* @param FileLocatorInterface $locator A FileLocatorInterface instance
* @param string $cacheDir The cache path
*/
public function __construct(FileLocatorInterface $locator, $cacheDir = null)
{
if (null !== $cacheDir && file_exists($cache = $cacheDir.'/templates.php')) {
$this->cache = require $cache;
}
$this->locator = $locator;
}
/**
* Returns a full path for a given file.
*
* @return string The full path for the file
*/
protected function getCacheKey($template)
{
return $template->getLogicalName();
}
/**
* Returns a full path for a given file.
*
* @param TemplateReferenceInterface $template A template
* @param string $currentPath Unused
* @param bool $first Unused
*
* @return string The full path for the file
*
* @throws \InvalidArgumentException When the template is not an instance of TemplateReferenceInterface
* @throws \InvalidArgumentException When the template file can not be found
*/
public function locate($template, $currentPath = null, $first = true)
{
if (!$template instanceof TemplateReferenceInterface) {
throw new \InvalidArgumentException('The template must be an instance of TemplateReferenceInterface.');
}
$key = $this->getCacheKey($template);
if (isset($this->cacheHits[$key])) {
return $this->cacheHits[$key];
}
if (isset($this->cache[$key])) {
return $this->cacheHits[$key] = realpath($this->cache[$key]) ?: $this->cache[$key];
}
try {
return $this->cacheHits[$key] = $this->locator->locate($template->getPath(), $currentPath);
} catch (\InvalidArgumentException $e) {
throw new \InvalidArgumentException(sprintf('Unable to find template "%s": ', $template).$e->getMessage(), 0, $e);
}
}
}