optimize tag and rebuilding

src/Tag/TagService.php

@@ -0,0 +1,134 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tag;
+
+use App\Entity\Tag;
+use App\Entity\Document;
+use App\Entity\DocumentTag;
+use App\Service\TagRebuildJobService;
+use Doctrine\ORM\EntityManagerInterface;
+
+final class TagService
+{
+    public function __construct(
+        private EntityManagerInterface $em,
+        private TagRebuildJobService $jobs,
+    ) {}
+
+    // =========================================================
+    // TAG CREATE
+    // =========================================================
+
+    public function create(string $slug, string $label, ?string $description = null): Tag
+    {
+        $slug  = trim($slug);
+        $label = trim($label);
+
+        if ($label === '' || $slug === '') {
+            throw new \InvalidArgumentException('Label und Slug sind Pflichtfelder.');
+        }
+
+        if ($this->slugExists($slug)) {
+            throw new \RuntimeException('Slug existiert bereits.');
+        }
+
+        $tag = new Tag($slug, $label, $description);
+
+        $this->em->persist($tag);
+        $this->em->flush();
+
+        $this->triggerRebuildIfIdle();
+
+        return $tag;
+    }
+
+    // =========================================================
+    // TAG DELETE
+    // =========================================================
+
+    public function deleteById(string $tagId): void
+    {
+        $tag = $this->em->getRepository(Tag::class)->find($tagId);
+
+        if (!$tag instanceof Tag) {
+            throw new \RuntimeException('Tag nicht gefunden.');
+        }
+
+        $this->delete($tag);
+    }
+
+    public function delete(Tag $tag): void
+    {
+        $this->em->remove($tag);
+        $this->em->flush();
+
+        $this->triggerRebuildIfIdle();
+    }
+
+    // =========================================================
+    // DOCUMENT TAG SYNC
+    // =========================================================
+
+    /**
+     * Synchronisiert alle Tags eines Dokuments.
+     * Löst einen Rebuild aus, da document_ids Teil des NDJSON sind.
+     */
+    public function syncDocumentTags(Document $document, array $newTagIds): void
+    {
+        $newTagIds = array_unique($newTagIds);
+
+        $currentRelations = $this->em
+            ->getRepository(DocumentTag::class)
+            ->findBy(['document' => $document]);
+
+        $currentTagIds = array_map(
+            fn(DocumentTag $dt) => (string) $dt->getTag()->getId(),
+            $currentRelations
+        );
+
+        $toAdd    = array_diff($newTagIds, $currentTagIds);
+        $toRemove = array_diff($currentTagIds, $newTagIds);
+
+        foreach ($toAdd as $tagId) {
+            $tag = $this->em->getRepository(Tag::class)->find($tagId);
+            if ($tag instanceof Tag) {
+                $this->em->persist(new DocumentTag($document, $tag));
+            }
+        }
+
+        foreach ($currentRelations as $relation) {
+            if (in_array((string) $relation->getTag()->getId(), $toRemove, true)) {
+                $this->em->remove($relation);
+            }
+        }
+
+        if ($toAdd || $toRemove) {
+            $this->em->flush();
+            $this->triggerRebuildIfIdle();
+        }
+    }
+
+    // =========================================================
+    // INTERNAL HELPERS
+    // =========================================================
+
+    private function slugExists(string $slug): bool
+    {
+        return (int) $this->em->createQueryBuilder()
+                ->select('COUNT(t.id)')
+                ->from(Tag::class, 't')
+                ->where('t.slug = :slug')
+                ->setParameter('slug', $slug)
+                ->getQuery()
+                ->getSingleScalarResult() > 0;
+    }
+
+    private function triggerRebuildIfIdle(): void
+    {
+        if (!$this->jobs->hasActiveJob()) {
+            $this->jobs->enqueueAndStartAsync();
+        }
+    }
+}