[Routing] Add alias in {foo:bar} syntax in route parameter

Author: eltharin

EventListener/RouterListener.php

@@ -117,7 +117,14 @@ public function onKernelRequest(RequestEvent $event): void
                 $attributes = [];
 
                 foreach ($parameters as $parameter => $value) {
-                    $attribute = $mapping[$parameter] ?? $parameter;
+                    if (!isset($mapping[$parameter])) {
+                        $attribute = $parameter;
+                    } elseif (\is_array($mapping[$parameter])) {
+                        [$attribute, $parameter] = $mapping[$parameter];
+                        $mappedAttributes[$attribute] = '';
+                    } else {
+                        $attribute = $mapping[$parameter];
+                    }
 
                     if (!isset($mappedAttributes[$attribute])) {
                         $attributes[$attribute] = $value;

Tests/EventListener/RouterListenerTest.php

@@ -323,5 +323,49 @@ public static function provideRouteMapping(): iterable
                 ],
             ],
         ];
+
+        yield [
+            [
+                'conference' => ['slug' => 'vienna-2024'],
+            ],
+            [
+                'slug' => 'vienna-2024',
+                '_route_mapping' => [
+                    'slug' => [
+                        'conference',
+                        'slug',
+                    ],
+                ],
+            ],
+        ];
+
+        yield [
+            [
+                'article' => [
+                    'id' => 'abc123',
+                    'date' => '2024-04-24',
+                    'slug' => 'symfony-rocks',
+                ],
+            ],
+            [
+                'id' => 'abc123',
+                'date' => '2024-04-24',
+                'slug' => 'symfony-rocks',
+                '_route_mapping' => [
+                    'id' => [
+                        'article',
+                        'id'
+                    ],
+                    'date' => [
+                        'article',
+                        'date',
+                    ],
+                    'slug' => [
+                        'article',
+                        'slug',
+                    ],
+                ],
+            ],
+        ];
     }
 }