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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 Doctrine\Common\Annotations\Reader;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\Config\Loader\LoaderResolverInterface;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\Routing\Annotation\Route as RouteAnnotation;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;
/**
* AnnotationClassLoader loads routing information from a PHP class and its methods.
*
* You need to define an implementation for the configureRoute() method. Most of the
* time, this method should define some PHP callable to be called for the route
* (a controller in MVC speak).
*
* The @Route annotation can be set on the class (for global parameters),
* and on each method.
*
* The @Route annotation main value is the route path. The annotation also
* recognizes several parameters: requirements, options, defaults, schemes,
* methods, host, and name. The name parameter is mandatory.
* Here is an example of how you should be able to use it:
* /**
* * @Route("/Blog")
* * /
* class Blog
* {
* /**
* * @Route("/", name="blog_index")
* * /
* public function index()
* {
* }
* /**
* * @Route("/{id}", name="blog_post", requirements = {"id" = "\d+"})
* * /
* public function show()
* {
* }
* }
*
* On PHP 8, the annotation class can be used as an attribute as well:
* #[Route('/Blog')]
* class Blog
* {
* #[Route('/', name: 'blog_index')]
* public function index()
* {
* }
* #[Route('/{id}', name: 'blog_post', requirements: ["id" => '\d+'])]
* public function show()
* {
* }
* }
*
* @author Fabien Potencier <fabien@symfony.com>
* @author Alexander M. Turek <me@derrabus.de>
*/
abstract class AnnotationClassLoader implements LoaderInterface
{
protected $reader;
protected $env;
/**
* @var string
*/
protected $routeAnnotationClass = RouteAnnotation::class;
/**
* @var int
*/
protected $defaultRouteIndex = 0;
public function __construct(Reader $reader = null, string $env = null)
{
$this->reader = $reader;
$this->env = $env;
}
/**
* Sets the annotation class to read route properties from.
*/
public function setRouteAnnotationClass(string $class)
{
$this->routeAnnotationClass = $class;
}
/**
* Loads from annotations from a class.
*
* @param string $class A class name
*
* @return RouteCollection
*
* @throws \InvalidArgumentException When route can't be parsed
*/
public function load($class, string $type = null)
{
if (!class_exists($class)) {
throw new \InvalidArgumentException(sprintf('Class "%s" does not exist.', $class));
}
$class = new \ReflectionClass($class);
if ($class->isAbstract()) {
throw new \InvalidArgumentException(sprintf('Annotations from class "%s" cannot be read as it is abstract.', $class->getName()));
}
$globals = $this->getGlobals($class);
$collection = new RouteCollection();
$collection->addResource(new FileResource($class->getFileName()));
if ($globals['env'] && $this->env !== $globals['env']) {
return $collection;
}
foreach ($class->getMethods() as $method) {
$this->defaultRouteIndex = 0;
foreach ($this->getAnnotations($method) as $annot) {
$this->addRoute($collection, $annot, $globals, $class, $method);
}
}
if (0 === $collection->count() && $class->hasMethod('__invoke')) {
$globals = $this->resetGlobals();
foreach ($this->getAnnotations($class) as $annot) {
$this->addRoute($collection, $annot, $globals, $class, $class->getMethod('__invoke'));
}
}
return $collection;
}
/**
* @param RouteAnnotation $annot or an object that exposes a similar interface
*/
protected function addRoute(RouteCollection $collection, object $annot, array $globals, \ReflectionClass $class, \ReflectionMethod $method)
{
if ($annot->getEnv() && $annot->getEnv() !== $this->env) {
return;
}
$name = $annot->getName();
if (null === $name) {
$name = $this->getDefaultRouteName($class, $method);
}
$name = $globals['name'].$name;
$requirements = $annot->getRequirements();
foreach ($requirements as $placeholder => $requirement) {
if (\is_int($placeholder)) {
throw new \InvalidArgumentException(sprintf('A placeholder name must be a string (%d given). Did you forget to specify the placeholder key for the requirement "%s" of route "%s" in "%s::%s()"?', $placeholder, $requirement, $name, $class->getName(), $method->getName()));
}
}
$defaults = array_replace($globals['defaults'], $annot->getDefaults());
$requirements = array_replace($globals['requirements'], $requirements);
$options = array_replace($globals['options'], $annot->getOptions());
$schemes = array_merge($globals['schemes'], $annot->getSchemes());
$methods = array_merge($globals['methods'], $annot->getMethods());
$host = $annot->getHost();
if (null === $host) {
$host = $globals['host'];
}
$condition = $annot->getCondition() ?? $globals['condition'];
$priority = $annot->getPriority() ?? $globals['priority'];
$path = $annot->getLocalizedPaths() ?: $annot->getPath();
$prefix = $globals['localized_paths'] ?: $globals['path'];
$paths = [];
if (\is_array($path)) {
if (!\is_array($prefix)) {
foreach ($path as $locale => $localePath) {
$paths[$locale] = $prefix.$localePath;
}
} elseif ($missing = array_diff_key($prefix, $path)) {
throw new \LogicException(sprintf('Route to "%s" is missing paths for locale(s) "%s".', $class->name.'::'.$method->name, implode('", "', array_keys($missing))));
} else {
foreach ($path as $locale => $localePath) {
if (!isset($prefix[$locale])) {
throw new \LogicException(sprintf('Route to "%s" with locale "%s" is missing a corresponding prefix in class "%s".', $method->name, $locale, $class->name));
}
$paths[$locale] = $prefix[$locale].$localePath;
}
}
} elseif (\is_array($prefix)) {
foreach ($prefix as $locale => $localePrefix) {
$paths[$locale] = $localePrefix.$path;
}
} else {
$paths[] = $prefix.$path;
}
foreach ($method->getParameters() as $param) {
if (isset($defaults[$param->name]) || !$param->isDefaultValueAvailable()) {
continue;
}
foreach ($paths as $locale => $path) {
if (preg_match(sprintf('/\{%s(?:<.*?>)?\}/', preg_quote($param->name)), $path)) {
$defaults[$param->name] = $param->getDefaultValue();
break;
}
}
}
foreach ($paths as $locale => $path) {
$route = $this->createRoute($path, $defaults, $requirements, $options, $host, $schemes, $methods, $condition);
$this->configureRoute($route, $class, $method, $annot);
if (0 !== $locale) {
$route->setDefault('_locale', $locale);
$route->setRequirement('_locale', preg_quote($locale));
$route->setDefault('_canonical_route', $name);
$collection->add($name.'.'.$locale, $route, $priority);
} else {
$collection->add($name, $route, $priority);
}
}
}
/**
* {@inheritdoc}
*/
public function supports($resource, string $type = null)
{
return \is_string($resource) && preg_match('/^(?:\\\\?[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)+$/', $resource) && (!$type || 'annotation' === $type);
}
/**
* {@inheritdoc}
*/
public function setResolver(LoaderResolverInterface $resolver)
{
}
/**
* {@inheritdoc}
*/
public function getResolver()
{
}
/**
* Gets the default route name for a class method.
*
* @return string
*/
protected function getDefaultRouteName(\ReflectionClass $class, \ReflectionMethod $method)
{
$name = str_replace('\\', '_', $class->name).'_'.$method->name;
$name = \function_exists('mb_strtolower') && preg_match('//u', $name) ? mb_strtolower($name, 'UTF-8') : strtolower($name);
if ($this->defaultRouteIndex > 0) {
$name .= '_'.$this->defaultRouteIndex;
}
++$this->defaultRouteIndex;
return $name;
}
protected function getGlobals(\ReflectionClass $class)
{
$globals = $this->resetGlobals();
$annot = null;
if (\PHP_VERSION_ID >= 80000 && ($attribute = $class->getAttributes($this->routeAnnotationClass, \ReflectionAttribute::IS_INSTANCEOF)[0] ?? null)) {
$annot = $attribute->newInstance();
}
if (!$annot && $this->reader) {
$annot = $this->reader->getClassAnnotation($class, $this->routeAnnotationClass);
}
if ($annot) {
if (null !== $annot->getName()) {
$globals['name'] = $annot->getName();
}
if (null !== $annot->getPath()) {
$globals['path'] = $annot->getPath();
}
$globals['localized_paths'] = $annot->getLocalizedPaths();
if (null !== $annot->getRequirements()) {
$globals['requirements'] = $annot->getRequirements();
}
if (null !== $annot->getOptions()) {
$globals['options'] = $annot->getOptions();
}
if (null !== $annot->getDefaults()) {
$globals['defaults'] = $annot->getDefaults();
}
if (null !== $annot->getSchemes()) {
$globals['schemes'] = $annot->getSchemes();
}
if (null !== $annot->getMethods()) {
$globals['methods'] = $annot->getMethods();
}
if (null !== $annot->getHost()) {
$globals['host'] = $annot->getHost();
}
if (null !== $annot->getCondition()) {
$globals['condition'] = $annot->getCondition();
}
$globals['priority'] = $annot->getPriority() ?? 0;
$globals['env'] = $annot->getEnv();
foreach ($globals['requirements'] as $placeholder => $requirement) {
if (\is_int($placeholder)) {
throw new \InvalidArgumentException(sprintf('A placeholder name must be a string (%d given). Did you forget to specify the placeholder key for the requirement "%s" in "%s"?', $placeholder, $requirement, $class->getName()));
}
}
}
return $globals;
}
private function resetGlobals(): array
{
return [
'path' => null,
'localized_paths' => [],
'requirements' => [],
'options' => [],
'defaults' => [],
'schemes' => [],
'methods' => [],
'host' => '',
'condition' => '',
'name' => '',
'priority' => 0,
'env' => null,
];
}
protected function createRoute(string $path, array $defaults, array $requirements, array $options, ?string $host, array $schemes, array $methods, ?string $condition)
{
return new Route($path, $defaults, $requirements, $options, $host, $schemes, $methods, $condition);
}
abstract protected function configureRoute(Route $route, \ReflectionClass $class, \ReflectionMethod $method, object $annot);
/**
* @param \ReflectionClass|\ReflectionMethod $reflection
*
* @return iterable<int, RouteAnnotation>
*/
private function getAnnotations(object $reflection): iterable
{
if (\PHP_VERSION_ID >= 80000) {
foreach ($reflection->getAttributes($this->routeAnnotationClass, \ReflectionAttribute::IS_INSTANCEOF) as $attribute) {
yield $attribute->newInstance();
}
}
if (!$this->reader) {
return;
}
$anntotations = $reflection instanceof \ReflectionClass
? $this->reader->getClassAnnotations($reflection)
: $this->reader->getMethodAnnotations($reflection);
foreach ($anntotations as $annotation) {
if ($annotation instanceof $this->routeAnnotationClass) {
yield $annotation;
}
}
}
}