From 6b54631f46ed64e9e7af8325a5a6ea1c292a44c6 Mon Sep 17 00:00:00 2001
From: Oliver Davies <oliver@oliverdavies.uk>
Date: Sun, 13 Jul 2025 01:12:40 +0100
Subject: [PATCH] Pre-populate the next podcast episode number

---
 modules/opd_podcast/opd_podcast.module        | 14 ++++++++
 modules/opd_podcast/opd_podcast.services.yml  |  5 +++
 .../Action/GetNextPodcastEpisodeNumber.php    | 20 +++++++++++
 .../src/Repository/PodcastNodeRepository.php  | 33 +++++++++++++++++++
 todo.txt                                      |  1 -
 5 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 modules/opd_podcast/opd_podcast.services.yml
 create mode 100644 modules/opd_podcast/src/Action/GetNextPodcastEpisodeNumber.php
 create mode 100644 modules/opd_podcast/src/Repository/PodcastNodeRepository.php

diff --git a/modules/opd_podcast/opd_podcast.module b/modules/opd_podcast/opd_podcast.module
index 494bd7b5f..68daff3c5 100644
--- a/modules/opd_podcast/opd_podcast.module
+++ b/modules/opd_podcast/opd_podcast.module
@@ -2,12 +2,26 @@
 
 declare(strict_types=1);
 
+use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Render\BubbleableMetadata;
 use Drupal\Core\StringTranslation\TranslatableMarkup;
 use Drupal\node\NodeInterface;
+use Drupal\opd_podcast\Action\GetNextPodcastEpisodeNumber;
 use Drupal\opd_podcast\Episode;
 use Drupal\opd_podcast\Guest;
 
+/**
+ * Implements hook_form_FORM_ID_alter().
+ *
+ * @param array{} $form
+ */
+function opd_podcast_form_node_podcast_episode_form_alter(array &$form, FormStateInterface $formState): void {
+  $nextEpisodeNumber = \Drupal::service(GetNextPodcastEpisodeNumber::class);
+  assert($nextEpisodeNumber instanceof GetNextPodcastEpisodeNumber);
+
+  $form['field_episode_number']['widget'][0]['value']['#default_value'] = $nextEpisodeNumber();
+}
+
 /**
  * Implements hook_entity_bundle_info_alter().
  *
diff --git a/modules/opd_podcast/opd_podcast.services.yml b/modules/opd_podcast/opd_podcast.services.yml
new file mode 100644
index 000000000..ff56c3f97
--- /dev/null
+++ b/modules/opd_podcast/opd_podcast.services.yml
@@ -0,0 +1,5 @@
+services:
+  Drupal\opd_podcast\Action\GetNextPodcastEpisodeNumber:
+    autowire: true
+  Drupal\opd_podcast\Repository\PodcastNodeRepository:
+    autowire: true
diff --git a/modules/opd_podcast/src/Action/GetNextPodcastEpisodeNumber.php b/modules/opd_podcast/src/Action/GetNextPodcastEpisodeNumber.php
new file mode 100644
index 000000000..bc65e89b6
--- /dev/null
+++ b/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;
+  }
+
+}
diff --git a/modules/opd_podcast/src/Repository/PodcastNodeRepository.php b/modules/opd_podcast/src/Repository/PodcastNodeRepository.php
new file mode 100644
index 000000000..24ae7ba9f
--- /dev/null
+++ b/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);
+  }
+
+}
diff --git a/todo.txt b/todo.txt
index 1c50e2880..d4ef27599 100644
--- a/todo.txt
+++ b/todo.txt
@@ -12,7 +12,6 @@ Podcast:
 - Link field for episode links.
 - Quotes and talking points in episodes.
 - Add copyright statement to podcast episodes.
-- Pre-populate the episode number to a default value based on the number of nodes.
 
 Testimonials: