Add the format_bytes filter for Contao 4.13 (#393)

config/services.php

@@ -5,6 +5,7 @@
 namespace Symfony\Component\DependencyInjection\Loader\Configurator;
 
 use Codefog\HasteBundle\StringParser;
+use Contao\CoreBundle\Framework\ContaoFramework;
 use Symfony\Contracts\Translation\TranslatorInterface;
 use Terminal42\NotificationCenterBundle\Backend\AutoSuggester;
 use Terminal42\NotificationCenterBundle\BulkyItem\BulkyItemStorage;
@@ -88,6 +89,7 @@
     $services->set(NotificationCenterExtension::class);
     $services->set(NotificationCenterRuntime::class)
         ->args([
+            service(ContaoFramework::class),
             service(BulkyItemStorage::class),
         ])
     ;

src/Twig/NotificationCenterExtension.php

@@ -4,7 +4,9 @@
 
 namespace Terminal42\NotificationCenterBundle\Twig;
 
+use Contao\CoreBundle\Twig\Runtime\FormatterRuntime;
 use Twig\Extension\AbstractExtension;
+use Twig\TwigFilter;
 use Twig\TwigFunction;
 
 class NotificationCenterExtension extends AbstractExtension
@@ -15,4 +17,20 @@ public function getFunctions(): array
             new TwigFunction('notification_center_file_url', [NotificationCenterRuntime::class, 'fileUrl']),
         ];
     }
+
+    public function getFilters(): array
+    {
+        // This class only exists in Contao 5 and provides the format_bytes filter.
+        if (class_exists(FormatterRuntime::class)) {
+            return [];
+        }
+
+        return [
+            new TwigFilter(
+                'format_bytes',
+                [NotificationCenterRuntime::class, 'formatBytes'],
+                ['is_safe' => ['html']],
+            ),
+        ];
+    }
 }

src/Twig/NotificationCenterRuntime.php

@@ -4,17 +4,31 @@
 
 namespace Terminal42\NotificationCenterBundle\Twig;
 
+use Contao\CoreBundle\Framework\ContaoFramework;
+use Contao\System;
 use Terminal42\NotificationCenterBundle\BulkyItem\BulkyItemStorage;
 use Twig\Extension\RuntimeExtensionInterface;
 
 final class NotificationCenterRuntime implements RuntimeExtensionInterface
 {
-    public function __construct(private readonly BulkyItemStorage $bulkyItemStorage)
-    {
+    public function __construct(
+        private readonly ContaoFramework $framework,
+        private readonly BulkyItemStorage $bulkyItemStorage,
+    ) {
     }
 
     public function fileUrl(string $voucher, int|null $ttl = null): string
     {
         return $this->bulkyItemStorage->generatePublicUri($voucher, $ttl);
     }
+
+    /**
+     * Convert a byte value into a human-readable format.
+     */
+    public function formatBytes(int $bytes, int $decimals = 1): string
+    {
+        $this->framework->initialize();
+
+        return System::getReadableSize($bytes, $decimals);
+    }
 }