/
Router.php
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/
Router.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\Routing;
use Symfony\Component\Routing\Router as BaseRouter;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Routing\RouteCollection;
use Symfony\Component\HttpKernel\CacheWarmer\WarmableInterface;
use Symfony\Component\DependencyInjection\Exception\ParameterNotFoundException;
use Symfony\Component\DependencyInjection\Exception\RuntimeException;
/**
* This Router creates the Loader only when the cache is empty.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Router extends BaseRouter implements WarmableInterface
{
private $container;
/**
* Constructor.
*
* @param ContainerInterface $container A ContainerInterface instance
* @param mixed $resource The main resource to load
* @param array $options An array of options
* @param RequestContext $context The context
*/
public function __construct(ContainerInterface $container, $resource, array $options = array(), RequestContext $context = null)
{
$this->container = $container;
$this->resource = $resource;
$this->context = null === $context ? new RequestContext() : $context;
$this->setOptions($options);
}
/**
* {@inheritdoc}
*/
public function getRouteCollection()
{
if (null === $this->collection) {
$this->collection = $this->container->get('routing.loader')->load($this->resource, $this->options['resource_type']);
$this->resolveParameters($this->collection);
}
return $this->collection;
}
/**
* {@inheritdoc}
*/
public function warmUp($cacheDir)
{
$currentDir = $this->getOption('cache_dir');
// force cache generation
$this->setOption('cache_dir', $cacheDir);
$this->getMatcher();
$this->getGenerator();
$this->setOption('cache_dir', $currentDir);
}
/**
* Replaces placeholders with service container parameter values in:
* - the route defaults,
* - the route requirements,
* - the route pattern.
*
* @param RouteCollection $collection
*/
private function resolveParameters(RouteCollection $collection)
{
foreach ($collection as $route) {
if ($route instanceof RouteCollection) {
$this->resolveParameters($route);
} else {
foreach ($route->getDefaults() as $name => $value) {
$route->setDefault($name, $this->resolveString($value));
}
foreach ($route->getRequirements() as $name => $value) {
$route->setRequirement($name, $this->resolveString($value));
}
$collection->setPrefix('/'.ltrim($this->resolveString($collection->getPrefix()), '/'));
$route->setPattern($this->resolveString($route->getPattern()));
}
}
}
/**
* Replaces placeholders with the service container parameters in the given string.
*
* @param mixed $value The source string which might contain %placeholders%
*
* @return mixed A string where the placeholders have been replaced, or the original value if not a string.
*
* @throws ParameterNotFoundException When a placeholder does not exist as a container parameter
* @throws RuntimeException When a container value is not a string or a numeric value
*/
private function resolveString($value)
{
$container = $this->container;
if (null === $value || false === $value || true === $value || is_object($value) || is_array($value)) {
return $value;
}
$escapedValue = preg_replace_callback('/%%|%([^%\s]+)%/', function ($match) use ($container, $value) {
// skip %%
if (!isset($match[1])) {
return '%%';
}
$key = strtolower($match[1]);
if (!$container->hasParameter($key)) {
throw new ParameterNotFoundException($key);
}
$resolved = $container->getParameter($key);
if (is_string($resolved) || is_numeric($resolved)) {
return (string) $resolved;
}
throw new RuntimeException(sprintf(
'A string value must be composed of strings and/or numbers,' .
'but found parameter "%s" of type %s inside string value "%s".',
$key,
gettype($resolved),
$value)
);
}, $value);
return str_replace('%%', '%', $escapedValue);
}
}