Rename custom module directories

- Rename `opdavies_blog` to `blog`.
- Rename `opdavies_blog_test` to `blog_test`.
- Rename `opdavies_talks` to `talks`.
- Rename `opdavies_talks_test` to `talks_test`.

The files within the directories haven't changed, so there is no
breaking change caused by renaming the directories.

 Please enter the commit message for your changes. Lines starting

web/modules/custom/talks/src/Entity/Node/Talk.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace Drupal\opdavies_talks\Entity\Node;
+
+use Drupal\discoverable_entity_bundle_classes\ContentEntityBundleInterface;
+use Drupal\node\Entity\Node;
+use Drupal\paragraphs\ParagraphInterface;
+use Illuminate\Support\Collection;
+
+/**
+ * Defines an talk node class.
+ *
+ * @ContentEntityBundleClass(
+ *   label = @Translation("Talk"),
+ *   entity_type = "node",
+ *   bundle = "talk"
+ * );
+ */
+class Talk extends Node implements ContentEntityBundleInterface {
+
+  public function addEvent(ParagraphInterface $event): void {
+    $this->set(
+      'field_events',
+      $this->getEvents()->push($event)->toArray()
+    );
+  }
+
+  public function getEvents(): Collection {
+    return Collection::make($this->get('field_events')
+      ->referencedEntities());
+  }
+
+  public function getNextDate(): ?int {
+    if ($this->get('field_event_date')->isEmpty()) {
+      return NULL;
+    }
+
+    return (int) $this->get('field_event_date')->getString();
+  }
+
+  /**
+   * Find the date for the latest event.
+   *
+   * @return string|null
+   */
+  public function findLatestEventDate(): ?string {
+    return $this->getEvents()
+      ->map(fn(ParagraphInterface $event) => $event->get('field_date')
+        ->getString())
+      ->max();
+  }
+
+  public function setNextDate(int $date): void {
+    $this->set('field_event_date', $date);
+  }
+
+}