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PhpMatcherDumper.php
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PhpMatcherDumper.php
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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\Matcher\Dumper;
use Symfony\Component\Routing\Route;
use Symfony\Component\Routing\RouteCollection;
/**
* PhpMatcherDumper creates a PHP class able to match URLs for a given set of routes.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class PhpMatcherDumper extends MatcherDumper
{
/**
* Dumps a set of routes to a PHP class.
*
* Available options:
*
* * class: The class name
* * base_class: The base class name
*
* @param array $options An array of options
*
* @return string A PHP class representing the matcher class
*/
public function dump(array $options = array())
{
$options = array_merge(array(
'class' => 'ProjectUrlMatcher',
'base_class' => 'Symfony\\Component\\Routing\\Matcher\\UrlMatcher',
), $options);
// trailing slash support is only enabled if we know how to redirect the user
$interfaces = class_implements($options['base_class']);
$supportsRedirections = isset($interfaces['Symfony\Component\Routing\Matcher\RedirectableUrlMatcherInterface']);
return
$this->startClass($options['class'], $options['base_class']).
$this->addConstructor().
$this->addMatcher($supportsRedirections).
$this->endClass()
;
}
private function addMatcher($supportsRedirections)
{
// we need to deep clone the routes as we will modify the structure to optimize the dump
$code = rtrim($this->compileRoutes(clone $this->getRoutes(), $supportsRedirections), "\n");
return <<<EOF
public function match(\$pathinfo)
{
\$allow = array();
\$pathinfo = urldecode(\$pathinfo);
$code
throw 0 < count(\$allow) ? new MethodNotAllowedException(array_unique(\$allow)) : new ResourceNotFoundException();
}
EOF;
}
private function compileRoutes(RouteCollection $routes, $supportsRedirections, $parentPrefix = null)
{
$code = '';
$routeIterator = $routes->getIterator();
$keys = array_keys($routeIterator->getArrayCopy());
$keysCount = count($keys);
$i = 0;
foreach ($routeIterator as $name => $route) {
$i++;
if ($route instanceof RouteCollection) {
$prefix = $route->getPrefix();
$optimizable = $prefix && count($route->all()) > 1 && false === strpos($route->getPrefix(), '{');
$optimized = false;
if ($optimizable) {
for ($j = $i; $j < $keysCount; $j++) {
if (null === $keys[$j]) {
continue;
}
$testRoute = $routeIterator->offsetGet($keys[$j]);
$isCollection = ($testRoute instanceof RouteCollection);
$testPrefix = $isCollection ? $testRoute->getPrefix() : $testRoute->getPattern();
if (0 === strpos($testPrefix, $prefix)) {
$routeIterator->offsetUnset($keys[$j]);
if ($isCollection) {
$route->addCollection($testRoute);
} else {
$route->add($keys[$j], $testRoute);
}
$i++;
$keys[$j] = null;
}
}
if ($prefix !== $parentPrefix) {
$code .= sprintf(" if (0 === strpos(\$pathinfo, %s)) {\n", var_export($prefix, true));
$optimized = true;
}
}
if ($optimized) {
foreach (explode("\n", $this->compileRoutes($route, $supportsRedirections, $prefix)) as $line) {
if ('' !== $line) {
$code .= ' '; // apply extra indention
}
$code .= $line."\n";
}
$code = substr($code, 0, -2); // remove redundant last two line breaks
$code .= " }\n\n";
} else {
$code .= $this->compileRoutes($route, $supportsRedirections, $prefix);
}
} else {
$code .= $this->compileRoute($route, $name, $supportsRedirections, $parentPrefix)."\n";
}
}
return $code;
}
private function compileRoute(Route $route, $name, $supportsRedirections, $parentPrefix = null)
{
$code = '';
$compiledRoute = $route->compile();
$conditions = array();
$hasTrailingSlash = false;
$matches = false;
$methods = array();
if ($req = $route->getRequirement('_method')) {
$methods = explode('|', strtoupper($req));
// GET and HEAD are equivalent
if (in_array('GET', $methods) && !in_array('HEAD', $methods)) {
$methods[] = 'HEAD';
}
}
$supportsTrailingSlash = $supportsRedirections && (!$methods || in_array('HEAD', $methods));
if (!count($compiledRoute->getVariables()) && false !== preg_match('#^(.)\^(?P<url>.*?)\$\1#', str_replace(array("\n", ' '), '', $compiledRoute->getRegex()), $m)) {
if ($supportsTrailingSlash && substr($m['url'], -1) === '/') {
$conditions[] = sprintf("rtrim(\$pathinfo, '/') === %s", var_export(rtrim(str_replace('\\', '', $m['url']), '/'), true));
$hasTrailingSlash = true;
} else {
$conditions[] = sprintf("\$pathinfo === %s", var_export(str_replace('\\', '', $m['url']), true));
}
} else {
if ($compiledRoute->getStaticPrefix() && $compiledRoute->getStaticPrefix() != $parentPrefix) {
$conditions[] = sprintf("0 === strpos(\$pathinfo, %s)", var_export($compiledRoute->getStaticPrefix(), true));
}
$regex = str_replace(array("\n", ' '), '', $compiledRoute->getRegex());
if ($supportsTrailingSlash && $pos = strpos($regex, '/$')) {
$regex = substr($regex, 0, $pos).'/?$'.substr($regex, $pos + 2);
$hasTrailingSlash = true;
}
$conditions[] = sprintf("preg_match(%s, \$pathinfo, \$matches)", var_export($regex, true));
$matches = true;
}
$conditions = implode(' && ', $conditions);
$code .= <<<EOF
// $name
if ($conditions) {
EOF;
if ($methods) {
$gotoname = 'not_'.preg_replace('/[^A-Za-z0-9_]/', '', $name);
if (1 === count($methods)) {
$code .= <<<EOF
if (\$this->context->getMethod() != '$methods[0]') {
\$allow[] = '$methods[0]';
goto $gotoname;
}
EOF;
} else {
$methods = implode("', '", $methods);
$code .= <<<EOF
if (!in_array(\$this->context->getMethod(), array('$methods'))) {
\$allow = array_merge(\$allow, array('$methods'));
goto $gotoname;
}
EOF;
}
}
if ($hasTrailingSlash) {
$code .= <<<EOF
if (substr(\$pathinfo, -1) !== '/') {
return \$this->redirect(\$pathinfo.'/', '$name');
}
EOF;
}
if ($scheme = $route->getRequirement('_scheme')) {
if (!$supportsRedirections) {
throw new \LogicException('The "_scheme" requirement is only supported for URL matchers that implement RedirectableUrlMatcherInterface.');
}
$code .= <<<EOF
if (\$this->context->getScheme() !== '$scheme') {
return \$this->redirect(\$pathinfo, '$name', '$scheme');
}
EOF;
}
// optimize parameters array
if (true === $matches && $compiledRoute->getDefaults()) {
$code .= sprintf(" return array_merge(\$this->mergeDefaults(\$matches, %s), array('_route' => '%s'));\n"
, str_replace("\n", '', var_export($compiledRoute->getDefaults(), true)), $name);
} elseif (true === $matches) {
$code .= sprintf(" \$matches['_route'] = '%s';\n", $name);
$code .= " return \$matches;\n";
} elseif ($compiledRoute->getDefaults()) {
$code .= sprintf(" return %s;\n", str_replace("\n", '', var_export(array_merge($compiledRoute->getDefaults(), array('_route' => $name)), true)));
} else {
$code .= sprintf(" return array('_route' => '%s');\n", $name);
}
$code .= " }\n";
if ($methods) {
$code .= " $gotoname:\n";
}
return $code;
}
private function startClass($class, $baseClass)
{
return <<<EOF
<?php
use Symfony\Component\Routing\Exception\MethodNotAllowedException;
use Symfony\Component\Routing\Exception\ResourceNotFoundException;
use Symfony\Component\Routing\RequestContext;
/**
* $class
*
* This class has been auto-generated
* by the Symfony Routing Component.
*/
class $class extends $baseClass
{
EOF;
}
private function addConstructor()
{
return <<<EOF
/**
* Constructor.
*/
public function __construct(RequestContext \$context)
{
\$this->context = \$context;
}
EOF;
}
private function endClass()
{
return <<<EOF
}
EOF;
}
}