move controller service logics into a service

src/Service/Admin/SystemPromptAdminService.php

@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service\Admin;
+
+use App\Entity\SystemPrompt;
+use App\Repository\SystemPromptRepository;
+use Doctrine\ORM\EntityManagerInterface;
+
+final readonly class SystemPromptAdminService
+{
+    public function __construct(
+        private SystemPromptRepository $repo,
+        private EntityManagerInterface $em,
+    ) {}
+
+    /**
+     * @return array{
+     *   active:?SystemPrompt,
+     *   all:array
+     * }
+     */
+    public function getIndexData(): array
+    {
+        return [
+            'active' => $this->repo->findActive(),
+            'all'    => $this->repo->findBy([], ['version' => 'DESC']),
+        ];
+    }
+
+    public function create(string $content, ?string $comment): SystemPrompt
+    {
+        $content = trim($content);
+
+        if ($content === '') {
+            throw new \InvalidArgumentException('System Prompt darf nicht leer sein.');
+        }
+
+        // aktive Version deaktivieren
+        $active = $this->repo->findActive();
+        if ($active instanceof SystemPrompt) {
+            $active->deactivate();
+        }
+
+        $new = new SystemPrompt(
+            version: $this->repo->getNextVersion(),
+            content: $content,
+            comment: $comment ? trim($comment) : null,
+            active: true
+        );
+
+        $this->em->persist($new);
+        $this->em->flush();
+
+        return $new;
+    }
+
+    public function activate(SystemPrompt $prompt): void
+    {
+        // alle aktiven deaktivieren (sicherheitsrobust)
+        foreach ($this->repo->findBy(['active' => true]) as $p) {
+            $p->deactivate();
+        }
+
+        $prompt->activate();
+
+        $this->em->flush();
+    }
+
+    public function delete(SystemPrompt $prompt): void
+    {
+        if ($prompt->isActive()) {
+            throw new \RuntimeException('Aktive Version kann nicht gelöscht werden.');
+        }
+
+        $this->em->remove($prompt);
+        $this->em->flush();
+    }
+}