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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;
use Symfony\Component\Config\Exception\FileLoaderLoadException;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\Config\Resource\ResourceInterface;
/**
* Helps add and import routes into a RouteCollection.
*
* @author Ryan Weaver <ryan@knpuniversity.com>
*/
class RouteCollectionBuilder
{
/**
* @var Route[]|RouteCollectionBuilder[]
*/
private $routes = array();
private $loader;
private $defaults = array();
private $prefix;
private $host;
private $condition;
private $requirements = array();
private $options = array();
private $schemes;
private $methods;
private $resources = array();
public function __construct(LoaderInterface $loader = null)
{
$this->loader = $loader;
}
/**
* Import an external routing resource and returns the RouteCollectionBuilder.
*
* $routes->import('blog.yml', '/blog');
*
* @param mixed $resource
* @param string|null $prefix
* @param string $type
*
* @return self
*
* @throws FileLoaderLoadException
*/
public function import($resource, $prefix = '/', $type = null)
{
/** @var RouteCollection[] $collections */
$collections = $this->load($resource, $type);
// create a builder from the RouteCollection
$builder = $this->createBuilder();
foreach ($collections as $collection) {
if (null === $collection) {
continue;
}
foreach ($collection->all() as $name => $route) {
$builder->addRoute($route, $name);
}
foreach ($collection->getResources() as $resource) {
$builder->addResource($resource);
}
}
// mount into this builder
$this->mount($prefix, $builder);
return $builder;
}
/**
* Adds a route and returns it for future modification.
*
* @param string $path The route path
* @param string $controller The route's controller
* @param string|null $name The name to give this route
*
* @return Route
*/
public function add($path, $controller, $name = null)
{
$route = new Route($path);
$route->setDefault('_controller', $controller);
$this->addRoute($route, $name);
return $route;
}
/**
* Returns a RouteCollectionBuilder that can be configured and then added with mount().
*
* @return self
*/
public function createBuilder()
{
return new self($this->loader);
}
/**
* Add a RouteCollectionBuilder.
*
* @param string $prefix
* @param RouteCollectionBuilder $builder
*/
public function mount($prefix, self $builder)
{
$builder->prefix = trim(trim($prefix), '/');
$this->routes[] = $builder;
}
/**
* Adds a Route object to the builder.
*
* @param Route $route
* @param string|null $name
*
* @return $this
*/
public function addRoute(Route $route, $name = null)
{
if (null === $name) {
// used as a flag to know which routes will need a name later
$name = '_unnamed_route_'.spl_object_hash($route);
}
$this->routes[$name] = $route;
return $this;
}
/**
* Sets the host on all embedded routes (unless already set).
*
* @param string $pattern
*
* @return $this
*/
public function setHost($pattern)
{
$this->host = $pattern;
return $this;
}
/**
* Sets a condition on all embedded routes (unless already set).
*
* @param string $condition
*
* @return $this
*/
public function setCondition($condition)
{
$this->condition = $condition;
return $this;
}
/**
* Sets a default value that will be added to all embedded routes (unless that
* default value is already set).
*
* @param string $key
* @param mixed $value
*
* @return $this
*/
public function setDefault($key, $value)
{
$this->defaults[$key] = $value;
return $this;
}
/**
* Sets a requirement that will be added to all embedded routes (unless that
* requirement is already set).
*
* @param string $key
* @param mixed $regex
*
* @return $this
*/
public function setRequirement($key, $regex)
{
$this->requirements[$key] = $regex;
return $this;
}
/**
* Sets an option that will be added to all embedded routes (unless that
* option is already set).
*
* @param string $key
* @param mixed $value
*
* @return $this
*/
public function setOption($key, $value)
{
$this->options[$key] = $value;
return $this;
}
/**
* Sets the schemes on all embedded routes (unless already set).
*
* @param array|string $schemes
*
* @return $this
*/
public function setSchemes($schemes)
{
$this->schemes = $schemes;
return $this;
}
/**
* Sets the methods on all embedded routes (unless already set).
*
* @param array|string $methods
*
* @return $this
*/
public function setMethods($methods)
{
$this->methods = $methods;
return $this;
}
/**
* Adds a resource for this collection.
*
* @return $this
*/
private function addResource(ResourceInterface $resource): self
{
$this->resources[] = $resource;
return $this;
}
/**
* Creates the final RouteCollection and returns it.
*
* @return RouteCollection
*/
public function build()
{
$routeCollection = new RouteCollection();
foreach ($this->routes as $name => $route) {
if ($route instanceof Route) {
$route->setDefaults(array_merge($this->defaults, $route->getDefaults()));
$route->setOptions(array_merge($this->options, $route->getOptions()));
foreach ($this->requirements as $key => $val) {
if (!$route->hasRequirement($key)) {
$route->setRequirement($key, $val);
}
}
if (null !== $this->prefix) {
$route->setPath('/'.$this->prefix.$route->getPath());
}
if (!$route->getHost()) {
$route->setHost($this->host);
}
if (!$route->getCondition()) {
$route->setCondition($this->condition);
}
if (!$route->getSchemes()) {
$route->setSchemes($this->schemes);
}
if (!$route->getMethods()) {
$route->setMethods($this->methods);
}
// auto-generate the route name if it's been marked
if ('_unnamed_route_' === substr($name, 0, 15)) {
$name = $this->generateRouteName($route);
}
$routeCollection->add($name, $route);
} else {
/* @var self $route */
$subCollection = $route->build();
$subCollection->addPrefix($this->prefix);
$routeCollection->addCollection($subCollection);
}
}
foreach ($this->resources as $resource) {
$routeCollection->addResource($resource);
}
return $routeCollection;
}
/**
* Generates a route name based on details of this route.
*/
private function generateRouteName(Route $route): string
{
$methods = implode('_', $route->getMethods()).'_';
$routeName = $methods.$route->getPath();
$routeName = str_replace(array('/', ':', '|', '-'), '_', $routeName);
$routeName = preg_replace('/[^a-z0-9A-Z_.]+/', '', $routeName);
// Collapse consecutive underscores down into a single underscore.
$routeName = preg_replace('/_+/', '_', $routeName);
return $routeName;
}
/**
* Finds a loader able to load an imported resource and loads it.
*
* @param mixed $resource A resource
* @param string|null $type The resource type or null if unknown
*
* @return RouteCollection[]
*
* @throws FileLoaderLoadException If no loader is found
*/
private function load($resource, string $type = null): array
{
if (null === $this->loader) {
throw new \BadMethodCallException('Cannot import other routing resources: you must pass a LoaderInterface when constructing RouteCollectionBuilder.');
}
if ($this->loader->supports($resource, $type)) {
$collections = $this->loader->load($resource, $type);
return \is_array($collections) ? $collections : array($collections);
}
if (null === $resolver = $this->loader->getResolver()) {
throw new FileLoaderLoadException($resource, null, null, null, $type);
}
if (false === $loader = $resolver->resolve($resource, $type)) {
throw new FileLoaderLoadException($resource, null, null, null, $type);
}
$collections = $loader->load($resource, $type);
return \is_array($collections) ? $collections : array($collections);
}
}