The start of something beautiful

vendor/symfony/security-bundle/Security/FirewallMap.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\Bundle\SecurityBundle\Security;
+
+use Psr\Container\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Security\Http\FirewallMapInterface;
+
+/**
+ * This is a lazy-loading firewall map implementation.
+ *
+ * Listeners will only be initialized if we really need them.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class FirewallMap implements FirewallMapInterface
+{
+    private ContainerInterface $container;
+    private iterable $map;
+
+    public function __construct(ContainerInterface $container, iterable $map)
+    {
+        $this->container = $container;
+        $this->map = $map;
+    }
+
+    public function getListeners(Request $request): array
+    {
+        $context = $this->getFirewallContext($request);
+
+        if (null === $context) {
+            return [[], null, null];
+        }
+
+        return [$context->getListeners(), $context->getExceptionListener(), $context->getLogoutListener()];
+    }
+
+    public function getFirewallConfig(Request $request): ?FirewallConfig
+    {
+        return $this->getFirewallContext($request)?->getConfig();
+    }
+
+    private function getFirewallContext(Request $request): ?FirewallContext
+    {
+        if ($request->attributes->has('_firewall_context')) {
+            $storedContextId = $request->attributes->get('_firewall_context');
+            foreach ($this->map as $contextId => $requestMatcher) {
+                if ($contextId === $storedContextId) {
+                    return $this->container->get($contextId);
+                }
+            }
+
+            $request->attributes->remove('_firewall_context');
+        }
+
+        foreach ($this->map as $contextId => $requestMatcher) {
+            if (null === $requestMatcher || $requestMatcher->matches($request)) {
+                $request->attributes->set('_firewall_context', $contextId);
+
+                return $this->container->get($contextId);
+            }
+        }
+
+        return null;
+    }
+}