Pre-populate the next podcast episode number

modules/opd_podcast/src/Action/GetNextPodcastEpisodeNumber.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\opd_podcast\Action;
+
+use Drupal\opd_podcast\Repository\PodcastNodeRepository;
+
+readonly final class GetNextPodcastEpisodeNumber {
+
+  public function __construct(private PodcastNodeRepository $repository) {
+  }
+
+  public function __invoke(): int {
+    $episodes = $this->repository->getPublished();
+
+    return count($episodes) + 1;
+  }
+
+}

modules/opd_podcast/src/Repository/PodcastNodeRepository.php

@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\opd_podcast\Repository;
+
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\node\NodeInterface;
+use Drupal\node\NodeStorageInterface;
+
+readonly final class PodcastNodeRepository {
+
+  private NodeStorageInterface $nodeStorage;
+
+  public function __construct(EntityTypeManagerInterface $entityTypeManager) {
+    $this->nodeStorage = $entityTypeManager->getStorage('node');
+  }
+
+  /**
+   * @return list<NodeInterface>
+   */
+  public function getPublished(): array {
+    $query = $this->nodeStorage->getQuery();
+    $query->accessCheck();
+    $query->condition('status', NodeInterface::PUBLISHED);
+    $query->condition('type', 'podcast_episode');
+
+    $nodeIds = $query->execute();
+
+    return $this->nodeStorage->loadMultiple($nodeIds);
+  }
+
+}