Skeleton is ready

app/Kernel/Http/Middleware/CheckAcceptHeader.php

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+<?php
+
+declare(strict_types=1);
+
+namespace App\Kernel\Http\Middleware;
+
+use App\Kernel\Http\ContentType;
+use App\Kernel\Http\Header;
+use App\Kernel\Object\Enum;
+use Closure;
+use Illuminate\Http\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Exception\NotAcceptableHttpException;
+
+class CheckAcceptHeader
+{
+    public function handle(Request $request, Closure $next): Response
+    {
+        $headerFound = false;
+
+        if ($this->acceptApplicationJson($request)) {
+            $headerFound = true;
+        }
+
+        if ($request->isMethod('OPTIONS') || $headerFound) {
+            return $next($request);
+        }
+
+        throw new NotAcceptableHttpException('Valid accept header not found');
+    }
+
+    private function acceptApplicationJson(Request $request): bool
+    {
+        $passedHeader = $request->headers->get(Header::Accept->value);
+        $expectedHeader = Enum::value(ContentType::ApplicationJson);
+
+        return $passedHeader === $expectedHeader;
+    }
+}