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<?php | |
/** | |
* @file | |
* Contains \Drupal\Core\ParamConverter\ParamConverterManager. | |
*/ | |
namespace Drupal\Core\ParamConverter; | |
use Symfony\Cmf\Component\Routing\RouteObjectInterface; | |
use Symfony\Component\Routing\RouteCollection; | |
/** | |
* Manages converter services for converting request parameters to full objects. | |
* | |
* A typical use case for this would be upcasting (converting) a node id to a | |
* node entity. | |
*/ | |
class ParamConverterManager implements ParamConverterManagerInterface { | |
/** | |
* Array of loaded converter services keyed by their ids. | |
* | |
* @var array | |
*/ | |
protected $converters = array(); | |
/** | |
* {@inheritdoc} | |
*/ | |
public function addConverter(ParamConverterInterface $param_converter, $id) { | |
$this->converters[$id] = $param_converter; | |
return $this; | |
} | |
/** | |
* {@inheritdoc} | |
*/ | |
public function getConverter($converter) { | |
if (isset($this->converters[$converter])) { | |
return $this->converters[$converter]; | |
} | |
else { | |
throw new \InvalidArgumentException(sprintf('No converter has been registered for %s', $converter)); | |
} | |
} | |
/** | |
* {@inheritdoc} | |
*/ | |
public function setRouteParameterConverters(RouteCollection $routes) { | |
foreach ($routes->all() as $route) { | |
if (!$parameters = $route->getOption('parameters')) { | |
// Continue with the next route if no parameters have been defined. | |
continue; | |
} | |
// Loop over all defined parameters and look up the right converter. | |
foreach ($parameters as $name => &$definition) { | |
if (isset($definition['converter'])) { | |
// Skip parameters that already have a manually set converter. | |
continue; | |
} | |
foreach (array_keys($this->converters) as $converter) { | |
if ($this->getConverter($converter)->applies($definition, $name, $route)) { | |
$definition['converter'] = $converter; | |
break; | |
} | |
} | |
} | |
// Override the parameters array. | |
$route->setOption('parameters', $parameters); | |
} | |
} | |
/** | |
* {@inheritdoc} | |
*/ | |
public function convert(array $defaults) { | |
/** @var $route \Symfony\Component\Routing\Route */ | |
$route = $defaults[RouteObjectInterface::ROUTE_OBJECT]; | |
// Skip this enhancer if there are no parameter definitions. | |
if (!$parameters = $route->getOption('parameters')) { | |
return $defaults; | |
} | |
// Invoke the registered converter for each parameter. | |
foreach ($parameters as $name => $definition) { | |
if (!isset($defaults[$name])) { | |
// Do not try to convert anything that is already set to NULL. | |
continue; | |
} | |
if (!isset($definition['converter'])) { | |
// Continue if no converter has been specified. | |
continue; | |
} | |
// If a converter returns NULL it means that the parameter could not be | |
// converted. | |
$defaults[$name] = $this->getConverter($definition['converter'])->convert($defaults[$name], $definition, $name, $defaults); | |
if (!isset($defaults[$name])) { | |
throw new ParamNotConvertedException(sprintf('The "%s" parameter was not converted for the path "%s" (route name: "%s")', $name, $route->getPath(), $defaults[RouteObjectInterface::ROUTE_NAME])); | |
} | |
} | |
return $defaults; | |
} | |
} |