feat: maintenance mode

.env

@@ -104,3 +104,8 @@ FEATURE_DATEV_EMAIL=false
 FEATURE_MYEP_LOGIN=false
 
 UPLOAD_REPLACEMENT_FILE=assets/pdf/chicken.pdf
+
+MAINTENANCE_MODE_ENABLED=false
+MAINTENANCE_MODE_IP_WHITELIST=188.245.62.21
+MAINTENANCE_MODE_ROUTE_WHITELIST=
+MAINTENANCE_MODE_PATH_WHITELIST=

config/services.yaml

@@ -1,3 +1,4 @@
+# yaml-language-server: $schema=../vendor/symfony/dependency-injection/Loader/schema/services.schema.json
 parameters:
     bpn_crm_id_admin: '%env(int:APP_BPN_CRM_ID_ADMIN)%'
     bpn_crm_id_manager: '%env(int:APP_BPN_CRM_ID_MANAGER)%'
@@ -245,6 +246,14 @@ services:
             $binGs: '%env(BIN_GS)%'
             $binConvert: '%env(BIN_CONVERT)%'
 
+    App\EventListener\MaintenanceModeListener:
+        arguments:
+            $options:
+                enabled: '%env(bool:MAINTENANCE_MODE_ENABLED)%'
+                whitelisted_ips: '%env(csv:MAINTENANCE_MODE_IP_WHITELIST)%'
+                whitelisted_routes: '%env(csv:MAINTENANCE_MODE_ROUTE_WHITELIST)%'
+                whitelisted_paths: '%env(csv:MAINTENANCE_MODE_PATH_WHITELIST)%'
+
     App\EventListener\UploadSessionListener:
         tags:
             - name: kernel.event_listener

src/EventListener/MaintenanceModeListener.php

@@ -0,0 +1,86 @@
+<?php
+
+namespace App\EventListener;
+
+use Symfony\Component\EventDispatcher\Attribute\AsEventListener;
+use Symfony\Component\HttpFoundation\IpUtils;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+use Twig\Environment;
+
+#[AsEventListener(event: KernelEvents::REQUEST, method: 'onKernelRequest')]
+class MaintenanceModeListener
+{
+    /**
+     * @var array<string, mixed>
+     */
+    private array $config;
+
+    /**
+     * @param array<string, mixed> $options
+     */
+    public function __construct(private readonly Environment $twig, array $options)
+    {
+        $this->config = $this->resolveConfig($options);
+    }
+
+    public function onKernelRequest(RequestEvent $event): void
+    {
+        if (false === $event->isMainRequest()) {
+            return;
+        }
+
+        if (false === $this->config['enabled']) {
+            return;
+        }
+
+        $request = $event->getRequest();
+
+        // Check requested path against whitelist
+        foreach ($this->config['whitelisted_paths'] as $whitelistedPath) {
+            $prefix = rtrim((string) $whitelistedPath, '/');
+
+            if ($request->getPathInfo() === $prefix || str_starts_with($request->getPathInfo(), $prefix.'/')) {
+                return;
+            }
+        }
+
+        // Check user's IP against whitelist
+        if (true === IpUtils::checkIp($request->getClientIp(), $this->config['whitelisted_ips'])) {
+            $request->attributes->set('_maintenance_mode_allowed', true);
+
+            return;
+        }
+
+        // Check requested route against whitelist
+        if (true === in_array($request->attributes->get('_route'), $this->config['whitelisted_routes'])) {
+            return;
+        }
+
+        $content = $this->twig->render('maintenance/index.html.twig');
+
+        $event->setResponse(new Response($content, Response::HTTP_SERVICE_UNAVAILABLE));
+    }
+
+    /**
+     * @param array<string, mixed> $options
+     *
+     * @return array<string, mixed>
+     */
+    private function resolveConfig(array $options): array
+    {
+        $optionsResolver = new OptionsResolver();
+        $optionsResolver
+            ->setDefaults([
+                'enabled' => false,
+                'whitelisted_ips' => [],
+                'whitelisted_routes' => [],
+                'whitelisted_paths' => [],
+            ])
+        ;
+
+        return $optionsResolver->resolve($options);
+    }
+}

templates/maintenance/index.html.twig

@@ -0,0 +1,22 @@
+{% extends 'base.html.twig' %}
+
+{% block body %}
+<div class="w-full h-screen flex flex-col items-center justify-center px-4">
+    <div class="w-full max-w-md p-8 bg-gray-100 border border-gray-200 rounded-md">
+        <h1 class="flex items-center justify-between mb-6">
+            <img class="h-10 w-auto" src="{{ asset('build/images/logo.svg') }}" alt="My E&amp;P Team">
+            <span class="text-3xl md:text-4xl leading-none font-bold text-gray-900">MyE&amp;P Team</span>
+        </h1>
+        <h2 class="text-2xl font-bold mb-8">
+            ...ist außer Betrieb
+        </h2>
+        <p class="mb-8">
+            Wir müssen gerade leider unaufschiebbare Wartungsarbeiten durchführen, sind aber schnellstmöglich wieder
+            online. Versprochen.
+        </p>
+        <p>
+            Vielen Dank für Dein Verständnis!
+        </p>
+    </div>
+</div>
+{% endblock %}