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<?php
namespace Illuminate\Routing;
use Illuminate\Routing\Exceptions\UrlGenerationException;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
class RouteUrlGenerator
{
/**
* The URL generator instance.
*
* @var \Illuminate\Routing\UrlGenerator
*/
protected $url;
/**
* The request instance.
*
* @var \Illuminate\Http\Request
*/
protected $request;
/**
* The named parameter defaults.
*
* @var array
*/
public $defaultParameters = [];
/**
* Characters that should not be URL encoded.
*
* @var array
*/
public $dontEncode = [
'%2F' => '/',
'%40' => '@',
'%3A' => ':',
'%3B' => ';',
'%2C' => ',',
'%3D' => '=',
'%2B' => '+',
'%21' => '!',
'%2A' => '*',
'%7C' => '|',
'%3F' => '?',
'%26' => '&',
'%23' => '#',
'%25' => '%',
];
/**
* Create a new Route URL generator.
*
* @param \Illuminate\Routing\UrlGenerator $url
* @param \Illuminate\Http\Request $request
* @return void
*/
public function __construct($url, $request)
{
$this->url = $url;
$this->request = $request;
}
/**
* Generate a URL for the given route.
*
* @param \Illuminate\Routing\Route $route
* @param array $parameters
* @param bool $absolute
* @return string
*
* @throws \Illuminate\Routing\Exceptions\UrlGenerationException
*/
public function to($route, $parameters = [], $absolute = false)
{
$domain = $this->getRouteDomain($route, $parameters);
// First we will construct the entire URI including the root and query string. Once it
// has been constructed, we'll make sure we don't have any missing parameters or we
// will need to throw the exception to let the developers know one was not given.
$uri = $this->addQueryString($this->url->format(
$root = $this->replaceRootParameters($route, $domain, $parameters),
$this->replaceRouteParameters($route->uri(), $parameters),
$route
), $parameters);
if (preg_match_all('/{(.*?)}/', $uri, $matchedMissingParameters)) {
throw UrlGenerationException::forMissingParameters($route, $matchedMissingParameters[1]);
}
// Once we have ensured that there are no missing parameters in the URI we will encode
// the URI and prepare it for returning to the developer. If the URI is supposed to
// be absolute, we will return it as-is. Otherwise we will remove the URL's root.
$uri = strtr(rawurlencode($uri), $this->dontEncode);
if (! $absolute) {
$uri = preg_replace('#^(//|[^/?])+#', '', $uri);
if ($base = $this->request->getBaseUrl()) {
$uri = preg_replace('#^'.$base.'#i', '', $uri);
}
return '/'.ltrim($uri, '/');
}
return $uri;
}
/**
* Get the formatted domain for a given route.
*
* @param \Illuminate\Routing\Route $route
* @param array $parameters
* @return string
*/
protected function getRouteDomain($route, &$parameters)
{
return $route->getDomain() ? $this->formatDomain($route, $parameters) : null;
}
/**
* Format the domain and port for the route and request.
*
* @param \Illuminate\Routing\Route $route
* @param array $parameters
* @return string
*/
protected function formatDomain($route, &$parameters)
{
return $this->addPortToDomain(
$this->getRouteScheme($route).$route->getDomain()
);
}
/**
* Get the scheme for the given route.
*
* @param \Illuminate\Routing\Route $route
* @return string
*/
protected function getRouteScheme($route)
{
if ($route->httpOnly()) {
return 'http://';
} elseif ($route->httpsOnly()) {
return 'https://';
}
return $this->url->formatScheme();
}
/**
* Add the port to the domain if necessary.
*
* @param string $domain
* @return string
*/
protected function addPortToDomain($domain)
{
$secure = $this->request->isSecure();
$port = (int) $this->request->getPort();
return ($secure && $port === 443) || (! $secure && $port === 80)
? $domain : $domain.':'.$port;
}
/**
* Replace the parameters on the root path.
*
* @param \Illuminate\Routing\Route $route
* @param string $domain
* @param array $parameters
* @return string
*/
protected function replaceRootParameters($route, $domain, &$parameters)
{
$scheme = $this->getRouteScheme($route);
return $this->replaceRouteParameters(
$this->url->formatRoot($scheme, $domain), $parameters
);
}
/**
* Replace all of the wildcard parameters for a route path.
*
* @param string $path
* @param array $parameters
* @return string
*/
protected function replaceRouteParameters($path, array &$parameters)
{
$path = $this->replaceNamedParameters($path, $parameters);
$path = preg_replace_callback('/\{.*?\}/', function ($match) use (&$parameters) {
// Reset only the numeric keys...
$parameters = array_merge($parameters);
return (! isset($parameters[0]) && ! Str::endsWith($match[0], '?}'))
? $match[0]
: Arr::pull($parameters, 0);
}, $path);
return trim(preg_replace('/\{.*?\?\}/', '', $path), '/');
}
/**
* Replace all of the named parameters in the path.
*
* @param string $path
* @param array $parameters
* @return string
*/
protected function replaceNamedParameters($path, &$parameters)
{
return preg_replace_callback('/\{(.*?)(\?)?\}/', function ($m) use (&$parameters) {
if (isset($parameters[$m[1]]) && $parameters[$m[1]] !== '') {
return Arr::pull($parameters, $m[1]);
} elseif (isset($this->defaultParameters[$m[1]])) {
return $this->defaultParameters[$m[1]];
} elseif (isset($parameters[$m[1]])) {
Arr::pull($parameters, $m[1]);
}
return $m[0];
}, $path);
}
/**
* Add a query string to the URI.
*
* @param string $uri
* @param array $parameters
* @return mixed|string
*/
protected function addQueryString($uri, array $parameters)
{
// If the URI has a fragment we will move it to the end of this URI since it will
// need to come after any query string that may be added to the URL else it is
// not going to be available. We will remove it then append it back on here.
if (! is_null($fragment = parse_url($uri, PHP_URL_FRAGMENT))) {
$uri = preg_replace('/#.*/', '', $uri);
}
$uri .= $this->getRouteQueryString($parameters);
return is_null($fragment) ? $uri : $uri."#{$fragment}";
}
/**
* Get the query string for a given route.
*
* @param array $parameters
* @return string
*/
protected function getRouteQueryString(array $parameters)
{
// First we will get all of the string parameters that are remaining after we
// have replaced the route wildcards. We'll then build a query string from
// these string parameters then use it as a starting point for the rest.
if (count($parameters) === 0) {
return '';
}
$query = Arr::query(
$keyed = $this->getStringParameters($parameters)
);
// Lastly, if there are still parameters remaining, we will fetch the numeric
// parameters that are in the array and add them to the query string or we
// will make the initial query string if it wasn't started with strings.
if (count($keyed) < count($parameters)) {
$query .= '&'.implode(
'&', $this->getNumericParameters($parameters)
);
}
$query = trim($query, '&');
return $query === '' ? '' : "?{$query}";
}
/**
* Get the string parameters from a given list.
*
* @param array $parameters
* @return array
*/
protected function getStringParameters(array $parameters)
{
return array_filter($parameters, 'is_string', ARRAY_FILTER_USE_KEY);
}
/**
* Get the numeric parameters from a given list.
*
* @param array $parameters
* @return array
*/
protected function getNumericParameters(array $parameters)
{
return array_filter($parameters, 'is_numeric', ARRAY_FILTER_USE_KEY);
}
/**
* Set the default named parameters used by the URL generator.
*
* @param array $defaults
* @return void
*/
public function defaults(array $defaults)
{
$this->defaultParameters = array_merge(
$this->defaultParameters, $defaults
);
}
}