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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\Component\Routing\Loader;
use Symfony\Component\Routing\RouteCollection;
use Symfony\Component\Routing\Route;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\Yaml\Yaml;
use Symfony\Component\Config\Loader\FileLoader;
/**
* YamlFileLoader loads Yaml routing files.
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Tobias Schultze <http://tobion.de>
*
* @api
*/
class YamlFileLoader extends FileLoader
{
private static $availableKeys = array(
'resource', 'type', 'prefix', 'pattern', 'hostname_pattern', 'defaults', 'requirements', 'options',
);
/**
* Loads a Yaml file.
*
* @param string $file A Yaml file path
* @param string|null $type The resource type
*
* @return RouteCollection A RouteCollection instance
*
* @throws \InvalidArgumentException When a route can't be parsed because YAML is invalid
*
* @api
*/
public function load($file, $type = null)
{
$path = $this->locator->locate($file);
$config = Yaml::parse($path);
$collection = new RouteCollection();
$collection->addResource(new FileResource($path));
// empty file
if (null === $config) {
return $collection;
}
// not an array
if (!is_array($config)) {
throw new \InvalidArgumentException(sprintf('The file "%s" must contain a YAML array.', $path));
}
foreach ($config as $name => $config) {
$this->validate($config, $name, $path);
if (isset($config['resource'])) {
$this->parseImport($collection, $config, $path, $file);
} else {
$this->parseRoute($collection, $name, $config, $path);
}
}
return $collection;
}
/**
* {@inheritdoc}
*
* @api
*/
public function supports($resource, $type = null)
{
return is_string($resource) && 'yml' === pathinfo($resource, PATHINFO_EXTENSION) && (!$type || 'yaml' === $type);
}
/**
* Parses a route and adds it to the RouteCollection.
*
* @param RouteCollection $collection A RouteCollection instance
* @param string $name Route name
* @param array $config Route definition
* @param string $path Full path of the YAML file being processed
*/
protected function parseRoute(RouteCollection $collection, $name, array $config, $path)
{
$defaults = isset($config['defaults']) ? $config['defaults'] : array();
$requirements = isset($config['requirements']) ? $config['requirements'] : array();
$options = isset($config['options']) ? $config['options'] : array();
$hostnamePattern = isset($config['hostname_pattern']) ? $config['hostname_pattern'] : null;
$route = new Route($config['pattern'], $defaults, $requirements, $options, $hostnamePattern);
$collection->add($name, $route);
}
/**
* Parses an import and adds the routes in the resource to the RouteCollection.
*
* @param RouteCollection $collection A RouteCollection instance
* @param array $config Route definition
* @param string $path Full path of the YAML file being processed
* @param string $file Loaded file name
*/
protected function parseImport(RouteCollection $collection, array $config, $path, $file)
{
$type = isset($config['type']) ? $config['type'] : null;
$prefix = isset($config['prefix']) ? $config['prefix'] : '';
$defaults = isset($config['defaults']) ? $config['defaults'] : array();
$requirements = isset($config['requirements']) ? $config['requirements'] : array();
$options = isset($config['options']) ? $config['options'] : array();
$hostnamePattern = isset($config['hostname_pattern']) ? $config['hostname_pattern'] : null;
$this->setCurrentDir(dirname($path));
$subCollection = $this->import($config['resource'], $type, false, $file);
/* @var $subCollection RouteCollection */
$subCollection->addPrefix($prefix);
if (null !== $hostnamePattern) {
$subCollection->setHostnamePattern($hostnamePattern);
}
$subCollection->addDefaults($defaults);
$subCollection->addRequirements($requirements);
$subCollection->addOptions($options);
$collection->addCollection($subCollection);
}
/**
* Validates the route configuration.
*
* @param array $config A resource config
* @param string $name The config key
* @param string $path The loaded file path
*
* @throws \InvalidArgumentException If one of the provided config keys is not supported,
* something is missing or the combination is nonesense
*/
protected function validate($config, $name, $path)
{
if (!is_array($config)) {
throw new \InvalidArgumentException(sprintf('The definition of "%s" in "%s" must be a YAML array.', $name, $path));
}
if ($extraKeys = array_diff(array_keys($config), self::$availableKeys)) {
throw new \InvalidArgumentException(sprintf(
'The routing file "%s" contains unsupport keys for "%s": "%s". Expected one of: "%s".',
$path, $name, implode('", "', $extraKeys), implode('", "', self::$availableKeys)
));
}
if (isset($config['resource']) && isset($config['pattern'])) {
throw new \InvalidArgumentException(sprintf(
'The routing file "%s" must not specify both the "resource" key and the "pattern" key for "%s". Choose between an import and a route definition.',
$path, $name
));
}
if (!isset($config['resource']) && isset($config['type'])) {
throw new \InvalidArgumentException(sprintf(
'The "type" key for the route definition "%s" in "%s" is unsupported. It is only available for imports in combination with the "resource" key.',
$name, $path
));
}
if (!isset($config['resource']) && !isset($config['pattern'])) {
throw new \InvalidArgumentException(sprintf(
'You must define a "pattern" for the route "%s" in file "%s".',
$name, $path
));
}
}
}
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