move controller service logics into a service

src/Service/TagRebuildStatusProvider.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\TagRebuildJob;
+use Doctrine\ORM\EntityManagerInterface;
+
+final readonly class TagRebuildStatusProvider
+{
+    public function __construct(
+        private EntityManagerInterface $em
+    ) {}
+
+    public function getLatestStatus(): ?array
+    {
+        $this->em->clear();
+
+        $job = $this->em->createQueryBuilder()
+            ->select('j')
+            ->from(TagRebuildJob::class, 'j')
+            ->orderBy('j.createdAt', 'DESC')
+            ->setMaxResults(1)
+            ->getQuery()
+            ->getOneOrNullResult();
+
+        if (!$job instanceof TagRebuildJob) {
+            return null;
+        }
+
+        return [
+            'status'     => $job->getStatus(),
+            'startedAt'  => $job->getStartedAt()?->format(DATE_ATOM),
+            'finishedAt' => $job->getFinishedAt()?->format(DATE_ATOM),
+            'error'      => $job->getErrorMessage(),
+        ];
+    }
+}