feat: error-codes in flash messages to reference log entries

src/Twig/ErrorCodeExtension.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Twig;
+
+use App\Service\ErrorCodeService;
+use Twig\Extension\AbstractExtension;
+use Twig\TwigFunction;
+
+class ErrorCodeExtension extends AbstractExtension
+{
+    public function __construct(
+        private readonly ErrorCodeService $errorCodeService,
+    ) {
+    }
+
+    public function getFunctions(): array
+    {
+        return [
+            new TwigFunction('error_code', [$this, 'getErrorCode']),
+            new TwigFunction('has_error_code', [$this, 'hasErrorCode']),
+        ];
+    }
+
+    public function getErrorCode(): ?string
+    {
+        return $this->errorCodeService->getErrorCode();
+    }
+
+    public function hasErrorCode(): bool
+    {
+        return $this->errorCodeService->hasError();
+    }
+}