<?php
/**
* This file is part of the CodeIgniter 4 framework.
*
* (c) CodeIgniter Foundation <admin@codeigniter.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace CodeIgniter\Router;
use CodeIgniter\Exceptions\PageNotFoundException;
use CodeIgniter\HTTP\Request;
use CodeIgniter\Router\Exceptions\RedirectException;
use CodeIgniter\Router\Exceptions\RouterException;
/**
* Request router.
*/
class Router implements RouterInterface
{
/**
* A RouteCollection instance.
*
* @var RouteCollectionInterface
*/
protected $collection;
/**
* Sub-directory that contains the requested controller class.
* Primarily used by 'autoRoute'.
*
* @var string|null
*/
protected $directory;
/**
* The name of the controller class.
*
* @var string
*/
protected $controller;
/**
* The name of the method to use.
*
* @var string
*/
protected $method;
/**
* An array of binds that were collected
* so they can be sent to closure routes.
*
* @var array
*/
protected $params = [];
/**
* The name of the front controller.
*
* @var string
*/
protected $indexPage = 'index.php';
/**
* Whether dashes in URI's should be converted
* to underscores when determining method names.
*
* @var boolean
*/
protected $translateURIDashes = false;
/**
* The route that was matched for this request.
*
* @var array|null
*/
protected $matchedRoute;
/**
* The options set for the matched route.
*
* @var array|null
*/
protected $matchedRouteOptions;
/**
* The locale that was detected in a route.
*
* @var string
*/
protected $detectedLocale;
/**
* The filter info from Route Collection
* if the matched route should be filtered.
*
* @var string|null
*/
protected $filterInfo;
//--------------------------------------------------------------------
/**
* Stores a reference to the RouteCollection object.
*
* @param RouteCollectionInterface $routes
* @param Request $request
*/
public function __construct(RouteCollectionInterface $routes, Request $request = null)
{
$this->collection = $routes;
$this->controller = $this->collection->getDefaultController();
$this->method = $this->collection->getDefaultMethod();
// @phpstan-ignore-next-line
$this->collection->setHTTPVerb($request->getMethod() ?? strtolower($_SERVER['REQUEST_METHOD']));
}
//--------------------------------------------------------------------
/**
* @param string|null $uri
*
* @return mixed|string
* @throws RedirectException
* @throws PageNotFoundException
*/
public function handle(string $uri = null)
{
$this->translateURIDashes = $this->collection->shouldTranslateURIDashes();
// If we cannot find a URI to match against, then
// everything runs off of it's default settings.
if ($uri === null || $uri === '')
{
return strpos($this->controller, '\\') === false
? $this->collection->getDefaultNamespace() . $this->controller
: $this->controller;
}
// Decode URL-encoded string
$uri = urldecode($uri);
// Restart filterInfo
$this->filterInfo = null;
if ($this->checkRoutes($uri))
{
if ($this->collection->isFiltered($this->matchedRoute[0]))
{
$this->filterInfo = $this->collection->getFilterForRoute($this->matchedRoute[0]);
}
return $this->controller;
}
// Still here? Then we can try to match the URI against
// Controllers/directories, but the application may not
// want this, like in the case of API's.
if (! $this->collection->shouldAutoRoute())
{
throw new PageNotFoundException("Can't find a route for '{$uri}'.");
}
$this->autoRoute($uri);
return $this->controllerName();
}
//--------------------------------------------------------------------
/**
* Returns the filter info for the matched route, if any.
*
* @return string
*/
public function getFilter()
{
return $this->filterInfo;
}
//--------------------------------------------------------------------
/**
* Returns the name of the matched controller.
*
* @return mixed
*/
public function controllerName()
{
return $this->translateURIDashes
? str_replace('-', '_', $this->controller)
: $this->controller;
}
//--------------------------------------------------------------------
/**
* Returns the name of the method to run in the
* chosen container.
*
* @return string
*/
public function methodName(): string
{
return $this->translateURIDashes
? str_replace('-', '_', $this->method)
: $this->method;
}
//--------------------------------------------------------------------
/**
* Returns the 404 Override settings from the Collection.
* If the override is a string, will split to controller/index array.
*/
public function get404Override()
{
$route = $this->collection->get404Override();
if (is_string($route))
{
$routeArray = explode('::', $route);
return [
$routeArray[0], // Controller
$routeArray[1] ?? 'index', // Method
];
}
if (is_callable($route))
{
return $route;
}
return null;
}
//--------------------------------------------------------------------
/**
* Returns the binds that have been matched and collected
* during the parsing process as an array, ready to send to
* instance->method(...$params).
*
* @return array
*/
public function params(): array
{
return $this->params;
}
//--------------------------------------------------------------------
/**
* Returns the name of the sub-directory the controller is in,
* if any. Relative to APPPATH.'Controllers'.
*
* Only used when auto-routing is turned on.
*
* @return string
*/
public function directory(): string
{
return ! empty($this->directory) ? $this->directory : '';
}
//--------------------------------------------------------------------
/**
* Returns the routing information that was matched for this
* request, if a route was defined.
*
* @return array|null
*/
public function getMatchedRoute()
{
return $this->matchedRoute;
}
//--------------------------------------------------------------------
/**
* Returns all options set for the matched route
*
* @return array|null
*/
public function getMatchedRouteOptions()
{
return $this->matchedRouteOptions;
}
//--------------------------------------------------------------------
/**
* Sets the value that should be used to match the index.php file. Defaults
* to index.php but this allows you to modify it in case your are using
* something like mod_rewrite to remove the page. This allows you to set
* it a blank.
*
* @param string $page
*
* @return $this
*/
public function setIndexPage($page): self
{
$this->indexPage = $page;
return $this;
}
//--------------------------------------------------------------------
/**
* Tells the system whether we should translate URI dashes or not
* in the URI from a dash to an underscore.
*
* @param boolean|false $val
*
* @return $this
*/
public function setTranslateURIDashes(bool $val = false): self
{
$this->translateURIDashes = $val;
return $this;
}
//--------------------------------------------------------------------
/**
* Returns true/false based on whether the current route contained
* a {locale} placeholder.
*
* @return boolean
*/
public function hasLocale()
{
return (bool) $this->detectedLocale;
}
//--------------------------------------------------------------------
/**
* Returns the detected locale, if any, or null.
*
* @return string
*/
public function getLocale()
{
return $this->detectedLocale;
}
//--------------------------------------------------------------------
/**
* Compares the uri string against the routes that the
* RouteCollection class defined for us, attempting to find a match.
* This method will modify $this->controller, etal as needed.
*
* @param string $uri The URI path to compare against the routes
*
* @return boolean Whether the route was matched or not.
* @throws RedirectException
*/
protected function checkRoutes(string $uri): bool
{
$routes = $this->collection->getRoutes($this->collection->getHTTPVerb());
// Don't waste any time
if (empty($routes))
{
return false;
}
$uri = $uri === '/'
? $uri
: ltrim($uri, '/ ');
// Loop through the route array looking for wildcards
foreach ($routes as $key => $val)
{
// Reset localeSegment
$localeSegment = null;
$key = $key === '/'
? $key
: ltrim($key, '/ ');
$matchedKey = $key;
// Are we dealing with a locale?
if (strpos($key, '{locale}') !== false)
{
$localeSegment = array_search('{locale}', preg_split('/[\/]*((^[a-zA-Z0-9])|\(([^()]*)\))*[\/]+/m', $key), true);
// Replace it with a regex so it
// will actually match.
$key = str_replace('/', '\/', $key);
$key = str_replace('{locale}', '[^\/]+', $key);
}
// Does the RegEx match?
if (preg_match('#^' . $key . '$#u', $uri, $matches))
{
// Is this route supposed to redirect to another?
if ($this->collection->isRedirect($key))
{
throw new RedirectException(is_array($val) ? key($val) : $val, $this->collection->getRedirectCode($key));
}
// Store our locale so CodeIgniter object can
// assign it to the Request.
if (isset($localeSegment))
{
// The following may be inefficient, but doesn't upset NetBeans :-/
$temp = (explode('/', $uri));
$this->detectedLocale = $temp[$localeSegment];
}
// Are we using Closures? If so, then we need
// to collect the params into an array
// so it can be passed to the controller method later.
if (! is_string($val) && is_callable($val))
{
$this->controller = $val;
// Remove the original string from the matches array
array_shift($matches);
$this->params = $matches;
$this->matchedRoute = [
$matchedKey,
$val,
];
$this->matchedRouteOptions = $this->collection->getRoutesOptions($matchedKey);
return true;
}
// Are we using the default method for back-references?
// Support resource route when function with subdirectory
// ex: $routes->resource('Admin/Admins');
if (strpos($val, '$') !== false && strpos($key, '(') !== false && strpos($key, '/') !== false)
{
$replacekey = str_replace('/(.*)', '', $key);
$val = preg_replace('#^' . $key . '$#u', $val, $uri);
$val = str_replace($replacekey, str_replace('/', '\\', $replacekey), $val);
}
elseif (strpos($val, '$') !== false && strpos($key, '(') !== false)
{
$val = preg_replace('#^' . $key . '$#u', $val, $uri);
}
elseif (strpos($val, '/') !== false)
{
[
$controller,
$method,
] = explode('::', $val);
// Only replace slashes in the controller, not in the method.
$controller = str_replace('/', '\\', $controller);
$val = $controller . '::' . $method;
}
$this->setRequest(explode('/', $val));
$this->matchedRoute = [
$matchedKey,
$val,
];
$this->matchedRouteOptions = $this->collection->getRoutesOptions($matchedKey);
return true;
}
}
return false;
}
//--------------------------------------------------------------------
/**
* Attempts to match a URI path against Controllers and directories
* found in APPPATH/Controllers, to find a matching route.
*
* @param string $uri
*/
public function autoRoute(string $uri)
{
$segments = explode('/', $uri);
$segments = $this->scanControllers($segments);
// If we don't have any segments left - try the default controller;
// WARNING: Directories get shifted out of the segments array.
if (empty($segments))
{
$this->setDefaultController();
}
// If not empty, then the first segment should be the controller
else
{
$this->controller = ucfirst(array_shift($segments));
}
$controllerName = $this->controllerName();
if (! $this->isValidSegment($controllerName))
{
throw new PageNotFoundException($this->controller . ' is not a valid controller name');
}
// Use the method name if it exists.
// If it doesn't, no biggie - the default method name
// has already been set.
if (! empty($segments))
{
$this->method = array_shift($segments) ?: $this->method;
}
if (! empty($segments))
{
$this->params = $segments;
}
$defaultNamespace = $this->collection->getDefaultNamespace();
if ($this->collection->getHTTPVerb() !== 'cli')
{
$controller = '\\' . $defaultNamespace;
$controller .= $this->directory ? str_replace('/', '\\', $this->directory) : '';
$controller .= $controllerName;
$controller = strtolower($controller);
$methodName = strtolower($this->methodName());
foreach ($this->collection->getRoutes('cli') as $route)
{
if (is_string($route))
{
$route = strtolower($route);
if (strpos($route, $controller . '::' . $methodName) === 0)
{
throw new PageNotFoundException();
}
if ($route === $controller)
{
throw new PageNotFoundException();
}
}
}
}
// Load the file so that it's available for CodeIgniter.
$file = APPPATH . 'Controllers/' . $this->directory . $controllerName . '.php';
if (is_file($file))
{
include_once $file;
}
// Ensure the controller stores the fully-qualified class name
// We have to check for a length over 1, since by default it will be '\'
if (strpos($this->controller, '\\') === false && strlen($defaultNamespace) > 1)
{
$this->controller = '\\' . ltrim(str_replace('/', '\\', $defaultNamespace . $this->directory . $controllerName), '\\');
}
}
//--------------------------------------------------------------------
/**
* Scans the controller directory, attempting to locate a controller matching the supplied uri $segments
*
* @param array $segments URI segments
*
* @return array returns an array of remaining uri segments that don't map onto a directory
*
* @deprecated this function name does not properly describe its behavior so it has been deprecated
*
* @codeCoverageIgnore
*/
protected function validateRequest(array $segments): array
{
return $this->scanControllers($segments);
}
//--------------------------------------------------------------------
/**
* Scans the controller directory, attempting to locate a controller matching the supplied uri $segments
*
* @param array $segments URI segments
*
* @return array returns an array of remaining uri segments that don't map onto a directory
*/
protected function scanControllers(array $segments): array
{
$segments = array_filter($segments, function ($segment) {
return $segment !== '';
});
// numerically reindex the array, removing gaps
$segments = array_values($segments);
// if a prior directory value has been set, just return segments and get out of here
if (isset($this->directory))
{
return $segments;
}
// Loop through our segments and return as soon as a controller
// is found or when such a directory doesn't exist
$c = count($segments);
while ($c-- > 0)
{
$segmentConvert = ucfirst($this->translateURIDashes === true ? str_replace('-', '_', $segments[0]) : $segments[0]);
// as soon as we encounter any segment that is not PSR-4 compliant, stop searching
if (! $this->isValidSegment($segmentConvert))
{
return $segments;
}
$test = APPPATH . 'Controllers/' . $this->directory . $segmentConvert;
// as long as each segment is *not* a controller file but does match a directory, add it to $this->directory
if (! is_file($test . '.php') && is_dir($test))
{
$this->setDirectory($segmentConvert, true, false);
array_shift($segments);
continue;
}
return $segments;
}
// This means that all segments were actually directories
return $segments;
}
//--------------------------------------------------------------------
/**
* Sets the sub-directory that the controller is in.
*
* @param string|null $dir
* @param boolean $append
* @param boolean $validate if true, checks to make sure $dir consists of only PSR4 compliant segments
*/
public function setDirectory(string $dir = null, bool $append = false, bool $validate = true)
{
if (empty($dir))
{
$this->directory = null;
return;
}
if ($validate)
{
$segments = explode('/', trim($dir, '/'));
foreach ($segments as $segment)
{
if (! $this->isValidSegment($segment))
{
return;
}
}
}
if ($append !== true || empty($this->directory))
{
$this->directory = trim($dir, '/') . '/';
}
else
{
$this->directory .= trim($dir, '/') . '/';
}
}
/**
* Returns true if the supplied $segment string represents a valid PSR-4 compliant namespace/directory segment
*
* regex comes from https://www.php.net/manual/en/language.variables.basics.php
*
* @param string $segment
* @return boolean
*/
private function isValidSegment(string $segment): bool
{
return (bool) preg_match('/^[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*$/', $segment);
}
//--------------------------------------------------------------------
/**
* Set request route
*
* Takes an array of URI segments as input and sets the class/method
* to be called.
*
* @param array $segments URI segments
*/
protected function setRequest(array $segments = [])
{
// If we don't have any segments - try the default controller;
if (empty($segments))
{
$this->setDefaultController();
return;
}
[$controller, $method] = array_pad(explode('::', $segments[0]), 2, null);
$this->controller = $controller;
// $this->method already contains the default method name,
// so don't overwrite it with emptiness.
if (! empty($method))
{
$this->method = $method;
}
array_shift($segments);
$this->params = $segments;
}
//--------------------------------------------------------------------
/**
* Sets the default controller based on the info set in the RouteCollection.
*/
protected function setDefaultController()
{
if (empty($this->controller))
{
throw RouterException::forMissingDefaultRoute();
}
// Is the method being specified?
if (sscanf($this->controller, '%[^/]/%s', $class, $this->method) !== 2)
{
$this->method = 'index';
}
if (! is_file(APPPATH . 'Controllers/' . $this->directory . ucfirst($class) . '.php'))
{
return;
}
$this->controller = ucfirst($class);
log_message('info', 'Used the default controller.');
}
//--------------------------------------------------------------------
}
MGatner