[10.x] Add "substituteImplicitBindingsUsing" method to router (#49200)

* Add "substituteImplicitBindingsUsing" method to router

* Remove un-used test method

* formatting

* simplify code

---------

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/Routing/Router.php

@@ -119,6 +119,13 @@ class Router implements BindingRegistrar, RegistrarContract
      */
     protected $groupStack = [];
 
+    /**
+     * The registered custom implicit binding callback.
+     *
+     * @var array
+     */
+    protected $implicitBindingCallback;
+
     /**
      * All of the verbs supported by the router.
      *
@@ -949,7 +956,25 @@ public function substituteBindings($route)
      */
     public function substituteImplicitBindings($route)
     {
-        ImplicitRouteBinding::resolveForRoute($this->container, $route);
+        $default = fn () => ImplicitRouteBinding::resolveForRoute($this->container, $route);
+
+        return call_user_func(
+            $this->implicitBindingCallback ?? $default, $this->container, $route, $default
+        );
+
+    }
+
+    /**
+     * Register a callback to to run after implicit bindings are substituted.
+     *
+     * @param  callable  $callback
+     * @return $this
+     */
+    public function substituteImplicitBindingsUsing($callback)
+    {
+        $this->implicitBindingCallback = $callback;
+
+        return $this;
     }
 
     /**

tests/Routing/RoutingRouteTest.php

@@ -1756,6 +1756,27 @@ public function testImplicitBindings()
         $this->assertSame('taylor', $router->dispatch(Request::create('foo/taylor', 'GET'))->getContent());
     }
 
+    public function testImplicitBindingsWithClosure()
+    {
+        $router = $this->getRouter();
+
+        $router->substituteImplicitBindingsUsing(function ($container, $route, $default) {
+            $default = $default();
+
+            $model = $route->parameter('bar');
+            $model->value = 'otwell';
+        });
+
+        $router->get('foo/{bar}', [
+            'middleware' => SubstituteBindings::class,
+            'uses' => function (RoutingTestUserModel $bar) {
+                return $bar->value;
+            },
+        ]);
+
+        $this->assertSame('otwell', $router->dispatch(Request::create('foo/taylor', 'GET'))->getContent());
+    }
+
     public function testImplicitBindingsWhereScopedBindingsArePrevented()
     {
         $router = $this->getRouter();