Add status route

Author: jdecool

config/routes.yaml

@@ -3,6 +3,10 @@ index:
     methods: [GET]
     controller: App\Controller\DefaultController::index
 
+status:
+    path: /status
+    controller: App\Controller\StatusController
+
 versions_all:
     path: /all.{_format}
     methods: [GET]

src/Controller/StatusController.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Controller;
+
+use App\PDOFactory;
+use PDO;
+use PDOException;
+use Symfony\Component\HttpFoundation\Response;
+
+class StatusController
+{
+    public function __construct(
+        private PDOFactory $factory,
+    ) {
+    }
+
+    public function __invoke(): Response
+    {
+        try {
+            $db = $this->factory->create();
+        } catch (PDOException) {
+            return new Response('FAILED: database connection error.', Response::HTTP_INTERNAL_SERVER_ERROR);
+        }
+
+        if (false === $db->exec('SELECT 1')) {
+            return new Response('FAILED: database access error.', Response::HTTP_INTERNAL_SERVER_ERROR);
+        }
+
+        return new Response('OK', Response::HTTP_OK);
+    }
+}