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src/Frontend/Frontend.php

@@ -49,7 +49,9 @@ class Frontend
     {
         $forumDocument = $this->getForumDocument($request);
 
-        $document = new Document($this->view, $forumDocument, $request);
+        $responseDocument = resolve('flarum.frontend.document');
+
+        $document = $responseDocument($forumDocument, $request);
 
         $this->populate($document, $request);
 

src/Frontend/FrontendServiceProvider.php

@@ -16,6 +16,8 @@ use Flarum\Http\UrlGenerator;
 use Flarum\Settings\SettingsRepositoryInterface;
 use Illuminate\Contracts\Container\Container;
 use Illuminate\Contracts\View\Factory as ViewFactory;
+use Illuminate\View\Factory;
+use Psr\Http\Message\ServerRequestInterface as Request;
 
 class FrontendServiceProvider extends AbstractServiceProvider
 {
@@ -57,6 +59,16 @@ class FrontendServiceProvider extends AbstractServiceProvider
                 return $frontend;
             };
         });
+
+        $this->container->singleton('flarum.frontend.document', function (Container $container) {
+            return function (array $apiDocument, Request $request) use ($container) {
+                return new Document(
+                    $container->make(Factory::class),
+                    $apiDocument,
+                    $request
+                );
+            };
+        });
     }
 
     /**