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<?php
namespace Illuminate\Routing;
use Illuminate\Support\Arr;
class RouteParameterBinder
{
/**
* The route instance.
*
* @var \Illuminate\Routing\Route
*/
protected $route;
/**
* Create a new Route parameter binder instance.
*
* @param \Illuminate\Routing\Route $route
* @return void
*/
public function __construct($route)
{
$this->route = $route;
}
/**
* Get the parameters for the route.
*
* @param \Illuminate\Http\Request $request
* @return array
*/
public function parameters($request)
{
// If the route has a regular expression for the host part of the URI, we will
// compile that and get the parameter matches for this domain. We will then
// merge them into this parameters array so that this array is completed.
$parameters = $this->bindPathParameters($request);
// If the route has a regular expression for the host part of the URI, we will
// compile that and get the parameter matches for this domain. We will then
// merge them into this parameters array so that this array is completed.
if (! is_null($this->route->compiled->getHostRegex())) {
$parameters = $this->bindHostParameters(
$request, $parameters
);
}
return $this->replaceDefaults($parameters);
}
/**
* Get the parameter matches for the path portion of the URI.
*
* @param \Illuminate\Http\Request $request
* @return array
*/
protected function bindPathParameters($request)
{
$path = '/'.ltrim($request->decodedPath(), '/');
preg_match($this->route->compiled->getRegex(), $path, $matches);
return $this->matchToKeys(array_slice($matches, 1));
}
/**
* Extract the parameter list from the host part of the request.
*
* @param \Illuminate\Http\Request $request
* @param array $parameters
* @return array
*/
protected function bindHostParameters($request, $parameters)
{
preg_match($this->route->compiled->getHostRegex(), $request->getHost(), $matches);
return array_merge($this->matchToKeys(array_slice($matches, 1)), $parameters);
}
/**
* Combine a set of parameter matches with the route's keys.
*
* @param array $matches
* @return array
*/
protected function matchToKeys(array $matches)
{
if (empty($parameterNames = $this->route->parameterNames())) {
return [];
}
$parameters = array_intersect_key($matches, array_flip($parameterNames));
return array_filter($parameters, function ($value) {
return is_string($value) && strlen($value) > 0;
});
}
/**
* Replace null parameters with their defaults.
*
* @param array $parameters
* @return array
*/
protected function replaceDefaults(array $parameters)
{
foreach ($parameters as $key => $value) {
$parameters[$key] = $value ?? Arr::get($this->route->defaults, $key);
}
foreach ($this->route->defaults as $key => $value) {
if (! isset($parameters[$key])) {
$parameters[$key] = $value;
}
}
return $parameters;
}
}
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