Files
simple-php-router/src/Pecee/SimpleRouter/Router.php
2023-04-24 20:05:33 +02:00

977 lines
28 KiB
PHP

<?php
namespace Pecee\SimpleRouter;
use Exception;
use Pecee\Exceptions\InvalidArgumentException;
use Pecee\Http\Exceptions\MalformedUrlException;
use Pecee\Http\Middleware\BaseCsrfVerifier;
use Pecee\Http\Request;
use Pecee\Http\Url;
use Pecee\SimpleRouter\ClassLoader\ClassLoader;
use Pecee\SimpleRouter\ClassLoader\IClassLoader;
use Pecee\SimpleRouter\Exceptions\HttpException;
use Pecee\SimpleRouter\Exceptions\NotFoundHttpException;
use Pecee\SimpleRouter\Handlers\EventHandler;
use Pecee\SimpleRouter\Handlers\IEventHandler;
use Pecee\SimpleRouter\Handlers\IExceptionHandler;
use Pecee\SimpleRouter\Route\IControllerRoute;
use Pecee\SimpleRouter\Route\IGroupRoute;
use Pecee\SimpleRouter\Route\ILoadableRoute;
use Pecee\SimpleRouter\Route\IPartialGroupRoute;
use Pecee\SimpleRouter\Route\IRoute;
class Router
{
/**
* Current request
* @var Request
*/
protected Request $request;
/**
* Defines if a route is currently being processed.
* @var bool
*/
protected bool $isProcessingRoute;
/**
* Defines all data from current processing route.
* @var ILoadableRoute
*/
protected ILoadableRoute $currentProcessingRoute;
/**
* All added routes
* @var array
*/
protected array $routes = [];
/**
* List of processed routes
* @var array|ILoadableRoute[]
*/
protected array $processedRoutes = [];
/**
* Stack of routes used to keep track of sub-routes added
* when a route is being processed.
* @var array
*/
protected array $routeStack = [];
/**
* List of added bootmanagers
* @var array
*/
protected array $bootManagers = [];
/**
* Csrf verifier class
* @var BaseCsrfVerifier|null
*/
protected ?BaseCsrfVerifier $csrfVerifier;
/**
* Get exception handlers
* @var array
*/
protected array $exceptionHandlers = [];
/**
* List of loaded exception that has been loaded.
* Used to ensure that exception-handlers aren't loaded twice when rewriting route.
*
* @var array
*/
protected array $loadedExceptionHandlers = [];
/**
* Enable or disabled debugging
* @var bool
*/
protected bool $debugEnabled = false;
/**
* The start time used when debugging is enabled
* @var float
*/
protected float $debugStartTime;
/**
* List containing all debug messages
* @var array
*/
protected array $debugList = [];
/**
* Contains any registered event-handler.
* @var array
*/
protected array $eventHandlers = [];
/**
* Class loader instance
* @var IClassLoader
*/
protected IClassLoader $classLoader;
/**
* When enabled the router will render all routes that matches.
* When disabled the router will stop execution when first route is found.
* @var bool
*/
protected bool $renderMultipleRoutes = false;
/**
* Router constructor.
*/
public function __construct()
{
$this->reset();
}
/**
* Resets the router by reloading request and clearing all routes and data.
*/
public function reset(): void
{
$this->debugStartTime = microtime(true);
$this->isProcessingRoute = false;
try {
$this->request = new Request();
} catch (MalformedUrlException $e) {
$this->debug(sprintf('Invalid request-uri url: %s', $e->getMessage()));
}
$this->routes = [];
$this->bootManagers = [];
$this->routeStack = [];
$this->processedRoutes = [];
$this->exceptionHandlers = [];
$this->loadedExceptionHandlers = [];
$this->eventHandlers = [];
$this->debugList = [];
$this->csrfVerifier = null;
$this->classLoader = new ClassLoader();
}
/**
* Add route
* @param IRoute $route
* @return IRoute
*/
public function addRoute(IRoute $route): IRoute
{
$this->fireEvents(EventHandler::EVENT_ADD_ROUTE, [
'route' => $route,
'isSubRoute' => $this->isProcessingRoute,
]);
/*
* If a route is currently being processed, that means that the route being added are rendered from the parent
* routes callback, so we add them to the stack instead.
*/
if ($this->isProcessingRoute === true) {
$this->routeStack[] = $route;
} else {
$this->routes[] = $route;
}
return $route;
}
/**
* Render and process any new routes added.
*
* @param IRoute $route
* @throws NotFoundHttpException
*/
protected function renderAndProcess(IRoute $route): void
{
$this->isProcessingRoute = true;
$route->renderRoute($this->request, $this);
$this->isProcessingRoute = false;
if (count($this->routeStack) !== 0) {
/* Pop and grab the routes added when executing group callback earlier */
$stack = $this->routeStack;
$this->routeStack = [];
/* Route any routes added to the stack */
$this->processRoutes($stack, ($route instanceof IGroupRoute) ? $route : null);
}
}
/**
* Process added routes.
*
* @param array|IRoute[] $routes
* @param IGroupRoute|null $group
* @throws NotFoundHttpException
*/
protected function processRoutes(array $routes, ?IGroupRoute $group = null): void
{
$this->debug('Processing routes');
// Stop processing routes if no valid route is found.
if ($this->request->getRewriteRoute() === null && $this->request->getUrl()->getOriginalUrl() === '') {
$this->debug('Halted route-processing as no valid route was found');
return;
}
$url = $this->request->getRewriteUrl() ?? $this->request->getUrl()->getPath();
// Loop through each route-request
foreach ($routes as $route) {
$this->debug('Processing route "%s"', get_class($route));
if ($group !== null) {
/* Add the parent group */
$route->setGroup($group);
}
/* @var $route IGroupRoute */
if ($route instanceof IGroupRoute) {
if ($route->matchRoute($url, $this->request) === true) {
/* Add exception handlers */
if (count($route->getExceptionHandlers()) !== 0) {
if ($route->getMergeExceptionHandlers() === true) {
foreach ($route->getExceptionHandlers() as $handler) {
$this->exceptionHandlers[] = $handler;
}
} else {
$this->exceptionHandlers = $route->getExceptionHandlers();
}
}
/* Only render partial group if it matches */
if ($route instanceof IPartialGroupRoute === true) {
$this->renderAndProcess($route);
continue;
}
}
if ($route instanceof IPartialGroupRoute === false) {
$this->renderAndProcess($route);
}
continue;
}
if ($route instanceof ILoadableRoute === true) {
/* Add the route to the map, so we can find the active one when all routes has been loaded */
$this->processedRoutes[] = $route;
}
}
}
/**
* Load routes
* @return void
* @throws NotFoundHttpException
*/
public function loadRoutes(): void
{
$this->debug('Loading routes');
$this->fireEvents(EventHandler::EVENT_LOAD_ROUTES, [
'routes' => $this->routes,
]);
/* Loop through each route-request */
$this->processRoutes($this->routes);
$this->fireEvents(EventHandler::EVENT_BOOT, [
'bootmanagers' => $this->bootManagers,
]);
/* Initialize boot-managers */
/* @var $manager IRouterBootManager */
foreach ($this->bootManagers as $manager) {
$className = get_class($manager);
$this->debug('Rendering bootmanager "%s"', $className);
$this->fireEvents(EventHandler::EVENT_RENDER_BOOTMANAGER, [
'bootmanagers' => $this->bootManagers,
'bootmanager' => $manager,
]);
/* Render bootmanager */
$manager->boot($this, $this->request);
$this->debug('Finished rendering bootmanager "%s"', $className);
}
$this->debug('Finished loading routes');
}
/**
* Start the routing
*
* @return string|null
* @throws NotFoundHttpException
* @throws \Pecee\Http\Middleware\Exceptions\TokenMismatchException
* @throws HttpException
* @throws Exception
*/
public function start(): ?string
{
$this->debug('Router starting');
$this->fireEvents(EventHandler::EVENT_INIT);
$this->loadRoutes();
if ($this->csrfVerifier !== null) {
$this->fireEvents(EventHandler::EVENT_RENDER_CSRF, [
'csrfVerifier' => $this->csrfVerifier,
]);
try {
/* Verify csrf token for request */
$this->csrfVerifier->handle($this->request);
} catch (Exception $e) {
return $this->handleException($e);
}
}
$output = $this->routeRequest();
$this->fireEvents(EventHandler::EVENT_LOAD, [
'loadedRoutes' => $this->getRequest()->getLoadedRoutes(),
]);
$this->debug('Routing complete');
return $output;
}
/**
* Routes the request
*
* @return string|null
* @throws HttpException
* @throws Exception
*/
public function routeRequest(): ?string
{
$this->debug('Routing request');
$methodNotAllowed = null;
try {
$url = $this->request->getRewriteUrl() ?? $this->request->getUrl()->getPath();
/* @var $route ILoadableRoute */
foreach ($this->processedRoutes as $key => $route) {
$this->debug('Matching route "%s"', get_class($route));
/* Add current processing route to constants */
$this->currentProcessingRoute = $route;
/* If the route matches */
if ($route->matchRoute($url, $this->request) === true) {
$this->fireEvents(EventHandler::EVENT_MATCH_ROUTE, [
'route' => $route,
]);
/* Check if request method matches */
if (count($route->getRequestMethods()) !== 0 && in_array($this->request->getMethod(), $route->getRequestMethods(), true) === false) {
$this->debug('Method "%s" not allowed', $this->request->getMethod());
// Only set method not allowed is not already set
if ($methodNotAllowed === null) {
$methodNotAllowed = true;
}
continue;
}
$this->fireEvents(EventHandler::EVENT_RENDER_MIDDLEWARES, [
'route' => $route,
'middlewares' => $route->getMiddlewares(),
]);
$route->loadMiddleware($this->request, $this);
$output = $this->handleRouteRewrite($key, $url);
if ($output !== null) {
return $output;
}
$methodNotAllowed = false;
$this->request->addLoadedRoute($route);
$this->fireEvents(EventHandler::EVENT_RENDER_ROUTE, [
'route' => $route,
]);
$routeOutput = $route->renderRoute($this->request, $this);
if ($this->renderMultipleRoutes === true) {
if ($routeOutput !== '') {
return $routeOutput;
}
$output = $this->handleRouteRewrite($key, $url);
if ($output !== null) {
return $output;
}
} else {
$output = $this->handleRouteRewrite($key, $url);
return $output ?? $routeOutput;
}
}
}
} catch (Exception $e) {
return $this->handleException($e);
}
if ($methodNotAllowed === true) {
$message = sprintf('Route "%s" or method "%s" not allowed.', $this->request->getUrl()->getPath(), $this->request->getMethod());
return $this->handleException(new NotFoundHttpException($message, 403));
}
if (count($this->request->getLoadedRoutes()) === 0) {
$rewriteUrl = $this->request->getRewriteUrl();
if ($rewriteUrl !== null) {
$message = sprintf('Route not found: "%s" (rewrite from: "%s")', $rewriteUrl, $this->request->getUrl()->getPath());
} else {
$message = sprintf('Route not found: "%s"', $this->request->getUrl()->getPath());
}
$this->debug($message);
return $this->handleException(new NotFoundHttpException($message, 404));
}
return null;
}
/**
* Handle route-rewrite
*
* @param string $key
* @param string $url
* @return string|null
* @throws HttpException
* @throws Exception
*/
protected function handleRouteRewrite(string $key, string $url): ?string
{
/* If the request has changed */
if ($this->request->hasPendingRewrite() === false) {
return null;
}
$route = $this->request->getRewriteRoute();
if ($route !== null) {
/* Add rewrite route */
$this->processedRoutes[] = $route;
}
if ($this->request->getRewriteUrl() !== $url) {
unset($this->processedRoutes[$key]);
$this->request->setHasPendingRewrite(false);
$this->fireEvents(EventHandler::EVENT_REWRITE, [
'rewriteUrl' => $this->request->getRewriteUrl(),
'rewriteRoute' => $this->request->getRewriteRoute(),
]);
return $this->routeRequest();
}
return null;
}
/**
* @param Exception $e
* @return string|null
* @throws Exception
* @throws HttpException
*/
protected function handleException(Exception $e): ?string
{
$this->debug('Starting exception handling for "%s"', get_class($e));
$this->fireEvents(EventHandler::EVENT_LOAD_EXCEPTIONS, [
'exception' => $e,
'exceptionHandlers' => $this->exceptionHandlers,
]);
/* @var $handler IExceptionHandler */
foreach (array_reverse($this->exceptionHandlers) as $key => $handler) {
if (is_object($handler) === false) {
$handler = new $handler();
}
$this->fireEvents(EventHandler::EVENT_RENDER_EXCEPTION, [
'exception' => $e,
'exceptionHandler' => $handler,
'exceptionHandlers' => $this->exceptionHandlers,
]);
$this->debug('Processing exception-handler "%s"', get_class($handler));
if (($handler instanceof IExceptionHandler) === false) {
throw new HttpException('Exception handler must implement the IExceptionHandler interface.', 500);
}
try {
$this->debug('Start rendering exception handler');
$handler->handleError($this->request, $e);
$this->debug('Finished rendering exception-handler');
if (isset($this->loadedExceptionHandlers[$key]) === false && $this->request->hasPendingRewrite() === true) {
$this->loadedExceptionHandlers[$key] = $handler;
$this->debug('Exception handler contains rewrite, reloading routes');
$this->fireEvents(EventHandler::EVENT_REWRITE, [
'rewriteUrl' => $this->request->getRewriteUrl(),
'rewriteRoute' => $this->request->getRewriteRoute(),
]);
if ($this->request->getRewriteRoute() !== null) {
$this->processedRoutes[] = $this->request->getRewriteRoute();
}
return $this->routeRequest();
}
} catch (Exception $e) {
}
$this->debug('Finished processing');
}
$this->debug('Finished exception handling - exception not handled, throwing');
throw $e;
}
/**
* Find route by alias, class, callback or method.
*
* @param string $name
* @return ILoadableRoute|null
*/
public function findRoute(string $name): ?ILoadableRoute
{
$this->debug('Finding route by name "%s"', $name);
$this->fireEvents(EventHandler::EVENT_FIND_ROUTE, [
'name' => $name,
]);
foreach ($this->processedRoutes as $route) {
/* Check if the name matches with a name on the route. Should match either router alias or controller alias. */
if ($route->hasName($name) === true) {
$this->debug('Found route "%s" by name "%s"', $route->getUrl(), $name);
return $route;
}
/* Direct match to controller */
if ($route instanceof IControllerRoute && strtoupper($route->getController()) === strtoupper($name)) {
$this->debug('Found route "%s" by controller "%s"', $route->getUrl(), $name);
return $route;
}
/* Using @ is most definitely a controller@method or alias@method */
if (strpos($name, '@') !== false) {
[$controller, $method] = array_map('strtolower', explode('@', $name));
if ($controller === strtolower((string)$route->getClass()) && $method === strtolower((string)$route->getMethod())) {
$this->debug('Found route "%s" by controller "%s" and method "%s"', $route->getUrl(), $controller, $method);
return $route;
}
}
/* Check if callback matches (if it's not a function) */
$callback = $route->getCallback();
if (is_string($callback) === true && is_callable($callback) === false && strpos($name, '@') !== false && strpos($callback, '@') !== false) {
/* Check if the entire callback is matching */
if (strpos($callback, $name) === 0 || strtolower($callback) === strtolower($name)) {
$this->debug('Found route "%s" by callback "%s"', $route->getUrl(), $name);
return $route;
}
/* Check if the class part of the callback matches (class@method) */
if (strtolower($name) === strtolower($route->getClass())) {
$this->debug('Found route "%s" by class "%s"', $route->getUrl(), $name);
return $route;
}
}
}
$this->debug('Route not found');
return null;
}
/**
* Get url for a route by using either name/alias, class or method name.
*
* The name parameter supports the following values:
* - Route name
* - Controller/resource name (with or without method)
* - Controller class name
*
* When searching for controller/resource by name, you can use this syntax "route.name@method".
* You can also use the same syntax when searching for a specific controller-class "MyController@home".
* If no arguments is specified, it will return the url for the current loaded route.
*
* @param string|null $name
* @param string|array|null $parameters
* @param array|null $getParams
* @return Url
* @throws InvalidArgumentException
*/
public function getUrl(?string $name = null, $parameters = null, ?array $getParams = null): Url
{
$this->debug('Finding url', func_get_args());
$this->fireEvents(EventHandler::EVENT_GET_URL, [
'name' => $name,
'parameters' => $parameters,
'getParams' => $getParams,
]);
if ($name === '' && $parameters === '') {
return new Url('/');
}
/* Only merge $_GET when all parameters are null */
$getParams = ($name === null && $parameters === null && $getParams === null) ? $_GET : (array)$getParams;
/* Return current route if no options has been specified */
if ($name === null && $parameters === null) {
return $this->request
->getUrlCopy()
->setParams($getParams);
}
$loadedRoute = $this->request->getLoadedRoute();
/* If nothing is defined and a route is loaded we use that */
if ($name === null && $loadedRoute !== null) {
return $this->request
->getUrlCopy()
->setPath($loadedRoute->findUrl($loadedRoute->getMethod(), $parameters, $name))
->setParams($getParams);
}
if ($name !== null) {
/* We try to find a match on the given name */
$route = $this->findRoute($name);
if ($route !== null) {
return $this->request
->getUrlCopy()
->setPath($route->findUrl($route->getMethod(), $parameters, $name))
->setParams($getParams);
}
}
/* Using @ is most definitely a controller@method or alias@method */
if (is_string($name) === true && strpos($name, '@') !== false) {
[$controller, $method] = explode('@', $name);
/* Loop through all the routes to see if we can find a match */
/* @var $route ILoadableRoute */
foreach ($this->processedRoutes as $processedRoute) {
/* Check if the route contains the name/alias */
if ($processedRoute->hasName($controller) === true) {
return $this->request
->getUrlCopy()
->setPath($processedRoute->findUrl($method, $parameters, $name))
->setParams($getParams);
}
/* Check if the route controller is equal to the name */
if ($processedRoute instanceof IControllerRoute && strtolower($processedRoute->getController()) === strtolower($controller)) {
return $this->request
->getUrlCopy()
->setPath($processedRoute->findUrl($method, $parameters, $name))
->setParams($getParams);
}
}
}
/* No result so we assume that someone is using a hardcoded url and join everything together. */
$url = trim(implode('/', array_merge((array)$name, (array)$parameters)), '/');
$url = (($url === '') ? '/' : '/' . $url . '/');
return $this->request
->getUrlCopy()
->setPath($url)
->setParams($getParams);
}
/**
* Get BootManagers
* @return array
*/
public function getBootManagers(): array
{
return $this->bootManagers;
}
/**
* Set BootManagers
*
* @param array $bootManagers
* @return static
*/
public function setBootManagers(array $bootManagers): self
{
$this->bootManagers = $bootManagers;
return $this;
}
/**
* Add BootManager
*
* @param IRouterBootManager $bootManager
* @return static
*/
public function addBootManager(IRouterBootManager $bootManager): self
{
$this->bootManagers[] = $bootManager;
return $this;
}
/**
* Get routes that has been processed.
*
* @return array
*/
public function getProcessedRoutes(): array
{
return $this->processedRoutes;
}
/**
* @return array
*/
public function getRoutes(): array
{
return $this->routes;
}
/**
* Set routes
*
* @param array $routes
* @return static
*/
public function setRoutes(array $routes): self
{
$this->routes = $routes;
return $this;
}
/**
* Get current request
*
* @return Request
*/
public function getRequest(): Request
{
return $this->request;
}
/**
* Get csrf verifier class
* @return BaseCsrfVerifier
*/
public function getCsrfVerifier(): ?BaseCsrfVerifier
{
return $this->csrfVerifier;
}
/**
* Set csrf verifier class
*
* @param BaseCsrfVerifier $csrfVerifier
*/
public function setCsrfVerifier(BaseCsrfVerifier $csrfVerifier): void
{
$this->csrfVerifier = $csrfVerifier;
}
/**
* Set class loader
*
* @param IClassLoader $loader
*/
public function setClassLoader(IClassLoader $loader): void
{
$this->classLoader = $loader;
}
/**
* Get class loader
*
* @return IClassLoader
*/
public function getClassLoader(): IClassLoader
{
return $this->classLoader;
}
/**
* Register event handler
*
* @param IEventHandler $handler
*/
public function addEventHandler(IEventHandler $handler): void
{
$this->eventHandlers[] = $handler;
}
/**
* Get registered event-handler.
*
* @return array
*/
public function getEventHandlers(): array
{
return $this->eventHandlers;
}
/**
* Fire event in event-handler.
*
* @param string $name
* @param array $arguments
*/
protected function fireEvents(string $name, array $arguments = []): void
{
if (count($this->eventHandlers) === 0) {
return;
}
/* @var IEventHandler $eventHandler */
foreach ($this->eventHandlers as $eventHandler) {
$eventHandler->fireEvents($this, $name, $arguments);
}
}
/**
* Add new debug message
* @param string $message
* @param array $args
*/
public function debug(string $message, ...$args): void
{
if ($this->debugEnabled === false) {
return;
}
$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
$this->debugList[] = [
'message' => vsprintf($message, $args),
'time' => number_format(microtime(true) - $this->debugStartTime, 10),
'trace' => end($trace),
];
}
/**
* Enable or disables debugging
*
* @param bool $enabled
* @return static
*/
public function setDebugEnabled(bool $enabled): self
{
$this->debugEnabled = $enabled;
return $this;
}
/**
* Get the list containing all debug messages.
*
* @return array
*/
public function getDebugLog(): array
{
return $this->debugList;
}
/**
* Get the current processing route details.
*
* @return ILoadableRoute
*/
public function getCurrentProcessingRoute(): ILoadableRoute
{
return $this->currentProcessingRoute;
}
/**
* Changes the rendering behavior of the router.
* When enabled the router will render all routes that matches.
* When disabled the router will stop rendering at the first route that matches.
*
* @param bool $bool
* @return $this
*/
public function setRenderMultipleRoutes(bool $bool): self
{
$this->renderMultipleRoutes = $bool;
return $this;
}
public function addExceptionHandler(IExceptionHandler $handler): self
{
$this->exceptionHandlers[] = $handler;
return $this;
}
}