feat: improved contingents api performance with db backed snapshots

src/Repository/Groups/ContingentSyncStateRepository.php

@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Repository\Groups;
+
+use App\Entity\Groups\Accommodation;
+use App\Entity\Groups\ContingentSyncState;
+use Doctrine\Bundle\DoctrineBundle\Repository\ServiceEntityRepository;
+use Doctrine\Persistence\ManagerRegistry;
+
+/**
+ * @extends ServiceEntityRepository<ContingentSyncState>
+ */
+class ContingentSyncStateRepository extends ServiceEntityRepository
+{
+    public function __construct(ManagerRegistry $registry)
+    {
+        parent::__construct($registry, ContingentSyncState::class);
+    }
+
+    public function findOneByAccommodation(Accommodation $accommodation): ?ContingentSyncState
+    {
+        return $this->findOneBy(['accommodation' => $accommodation]);
+    }
+
+    /**
+     * Returns every sync state keyed by accommodation id, for the revisions endpoint.
+     *
+     * @return array<int, ContingentSyncState>
+     */
+    public function findAllIndexedByAccommodationId(): array
+    {
+        $indexed = [];
+
+        foreach ($this->findAll() as $state) {
+            $accommodation = $state->getAccommodation();
+
+            if (null === $accommodation || null === $accommodation->getId()) {
+                continue;
+            }
+
+            $indexed[$accommodation->getId()] = $state;
+        }
+
+        return $indexed;
+    }
+}