Add visual button presets, jump targets and menu controls

src/Twig/VersionExtension.php

@@ -14,12 +14,28 @@ use Twig\TwigFunction;
  */
 final class VersionExtension extends AbstractExtension
 {
-    public function __construct(private Updater $updater)
+    public function __construct(private Updater $updater, private \Doctrine\DBAL\Connection $db)
     {
     }
 
     public function getFunctions(): array
     {
-        return [new TwigFunction('kant_version', $this->updater->version(...))];
+        return [new TwigFunction('kant_version', $this->updater->version(...)), new TwigFunction('kant_update_version', $this->available(...))];
+    }
+
+    public function available(): ?string
+    {
+        // The daily worker already checks releases. Rendering navigation never contacts Git.
+        try {
+            $message = $this->db->fetchOne('SELECT last_message FROM scheduled_task WHERE name = ?', ['update-check']);
+            if (is_string($message) && 1 === preg_match('/^Fassung (\d+\.\d+\.\d+) ist verfügbar/', $message, $match)
+                && version_compare($match[1], $this->updater->version(), '>')) {
+                return $match[1];
+            }
+        } catch (\Doctrine\DBAL\Exception) {
+            // An installation still waiting for migrations has no task table yet.
+        }
+
+        return null;
     }
 }