Some settings

src/Command/MercurePublishCommand.php

@@ -0,0 +1,65 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Command;
+
+use Symfony\Component\Console\Attribute\AsCommand;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\HttpClient\HttpClient;
+use Symfony\Component\Mercure\HubInterface;
+use Symfony\Component\Mercure\Update;
+
+#[AsCommand(
+    name: 'app:mercure:publish',
+    description: 'Publishes a test update to the Mercure hub.'
+)]
+final class MercurePublishCommand extends Command
+{
+    public function __construct(private readonly HubInterface $hub)
+    {
+        parent::__construct();
+    }
+
+    protected function configure(): void
+    {
+        $this
+            ->addArgument('topic', InputArgument::OPTIONAL, 'Topic URL to publish to', $_ENV['MERCURE_TOPIC_BASE'] . '/game/hub')
+            ->addOption('type', null, InputOption::VALUE_REQUIRED, 'Update type (for clients to filter)', 'game.event')
+            ->addOption('data', null, InputOption::VALUE_REQUIRED, 'JSON payload to send', '{"message":"Hello from Mercure!"}')
+            ->addOption('private', null, InputOption::VALUE_NONE, 'Mark the update as private');
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $topic = (string) $input->getArgument('topic');
+        $type = (string) $input->getOption('type');
+        $data = (string) $input->getOption('data');
+        $isPrivate = (bool) $input->getOption('private');
+
+        // Validate JSON
+        $decoded = json_decode($data, true);
+        if ($decoded === null && json_last_error() !== JSON_ERROR_NONE) {
+            $output->writeln('<error>Invalid JSON provided for --data.</error>');
+            return Command::FAILURE;
+        }
+
+        $update = new Update(
+            topics: $topic,
+            data: json_encode([
+                'type' => $type,
+                'payload' => $decoded,
+                'ts' => date('c'),
+            ], JSON_THROW_ON_ERROR),
+            private: $isPrivate
+        );
+
+        $this->hub->publish($update);
+
+        $output->writeln('<info>Published update to topic:</info> ' . $topic);
+        return Command::SUCCESS;
+    }
+}

src/Game/Controller/GameApiController.php

@@ -0,0 +1,49 @@
+<?php
+declare(strict_types=1);
+
+namespace App\Game\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Annotation\Route;
+
+#[Route('/game/api', name: 'game_api_')]
+final class GameApiController extends AbstractController
+{
+    #[Route('/ping', name: 'ping', methods: ['GET'])]
+    public function ping(): JsonResponse
+    {
+        return $this->json([
+            'ok' => true,
+            'service' => 'game-api',
+            'ts' => date('c'),
+        ]);
+    }
+
+    #[Route('/echo', name: 'echo', methods: ['POST'])]
+    public function echo(Request $request): JsonResponse
+    {
+        $raw = (string) $request->getContent();
+        $data = null;
+        if ($raw !== '') {
+            try {
+                /** @var array<string,mixed>|null $decoded */
+                $decoded = json_decode($raw, true, 512, JSON_THROW_ON_ERROR);
+                $data = $decoded;
+            } catch (\Throwable $e) {
+                return $this->json([
+                    'ok' => false,
+                    'error' => 'Invalid JSON: ' . $e->getMessage(),
+                ], Response::HTTP_BAD_REQUEST);
+            }
+        }
+
+        return $this->json([
+            'ok' => true,
+            'received' => $data,
+            'ts' => date('c'),
+        ]);
+    }
+}

src/Game/Controller/GameController.php

@@ -7,11 +7,11 @@ use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\Routing\Annotation\Route;
 
-final class HubController extends AbstractController
+final class GameController extends AbstractController
 {
-    #[Route(path: '', name: 'game_hub')]
+    #[Route(path: '', name: 'game')]
     public function index(): Response
     {
-        return $this->render('game/hub/index.html.twig');
+        return $this->render('game/index.html.twig');
     }
 }