Ability to set root view on the new middleware

src/Middleware.php

@@ -8,6 +8,14 @@
 
 class Middleware
 {
+    /**
+     * The root template that's loaded on the first page visit.
+     *
+     * @see https://inertiajs.com/server-side-setup#root-template
+     * @var string
+     */
+    protected $rootView = 'app';
+
     /**
      * Determines the current asset version.
      *
@@ -42,6 +50,18 @@ public function share(Request $request)
         ];
     }
 
+    /**
+     * Sets the root template that's loaded on the first page visit.
+     *
+     * @see https://inertiajs.com/server-side-setup#root-template
+     * @param Request $request
+     * @return string
+     */
+    public function rootView(Request $request)
+    {
+        return $this->rootView;
+    }
+
     /**
      * Handle the incoming request.
      *
@@ -57,6 +77,8 @@ public function handle(Request $request, Closure $next)
 
         Inertia::share($this->share($request));
 
+        Inertia::setRootView($this->rootView($request));
+
         $response = $next($request);
         $response = $this->checkVersion($request, $response);
         $response = $this->changeRedirectCode($request, $response);

stubs/middleware.stub

@@ -7,6 +7,14 @@ use Inertia\Middleware;
 
 class {{ class }} extends Middleware
 {
+    /**
+     * The root template that's loaded on the first page visit.
+     *
+     * @see https://inertiajs.com/server-side-setup#root-template
+     * @var string
+     */
+    protected $rootView = 'app';
+
     /**
      * Determines the current asset version.
      *

tests/MiddlewareTest.php

@@ -9,6 +9,7 @@
 use Illuminate\Support\MessageBag;
 use Illuminate\Support\ViewErrorBag;
 use Inertia\Inertia;
+use Inertia\Middleware;
 use Inertia\Tests\Stubs\ExampleMiddleware;
 
 class MiddlewareTest extends TestCase
@@ -139,10 +140,39 @@ public function test_default_validation_errors_can_be_overwritten()
         ]);
     }
 
-    private function prepareMockEndpoint($version = null, $shared = [])
+    public function test_middleware_can_change_the_root_view_via_a_property()
     {
-        return Route::middleware(StartSession::class)->get('/', function (Request $request) use ($version, $shared) {
-            return (new ExampleMiddleware($version, $shared))->handle($request, function ($request) {
+        $this->prepareMockEndpoint(null, [], new class extends Middleware {
+            protected $rootView = 'welcome';
+        });
+
+        $response = $this->get('/');
+        $response->assertOk();
+        $response->assertViewIs('welcome');
+    }
+
+    public function test_middleware_can_change_the_root_view_by_overriding_the_rootview_method()
+    {
+        $this->prepareMockEndpoint(null, [], new class extends Middleware {
+            public function rootView(Request $request)
+            {
+                return 'welcome';
+            }
+        });
+
+        $response = $this->get('/');
+        $response->assertOk();
+        $response->assertViewIs('welcome');
+    }
+
+    private function prepareMockEndpoint($version = null, $shared = [], $middleware = null)
+    {
+        if (is_null($middleware)) {
+            $middleware = new ExampleMiddleware($version, $shared);
+        }
+
+        return Route::middleware(StartSession::class)->get('/', function (Request $request) use ($middleware) {
+            return $middleware->handle($request, function ($request) {
                 return Inertia::render('User/Edit', ['user' => ['name' => 'Jonathan']])->toResponse($request);
             });
         });