Refactor to a repository

web/modules/custom/opdavies_talks/opdavies_talks.services.yml

@@ -0,0 +1,4 @@
+services:
+  Drupal\opdavies_talks\Controller\TalksPageController:
+    autowire: true
+  Drupal\opdavies_talks\Repository\TalkNodeRepository: []

web/modules/custom/opdavies_talks/src/Controller/TalksPageController.php

@@ -5,13 +5,17 @@ declare(strict_types=1);
 namespace Drupal\opdavies_talks\Controller;
 
 use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\opdavies_talks\Repository\TalkNodeRepository;
 
 final class TalksPageController {
 
   use StringTranslationTrait;
 
+  public function __construct(private TalkNodeRepository $talkRepository) {
+  }
+
   public function __invoke(): array {
-    $talkCount = 2;
+    $talkCount = $this->talkRepository->getCount();
 
     return ['#markup' => $this->t('<span data-talk-count>:count talks</span>', [':count' => $talkCount])];
   }

web/modules/custom/opdavies_talks/src/Repository/TalkNodeRepository.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\opdavies_talks\Repository;
+
+final class TalkNodeRepository {
+
+  public function getCount(): int {
+    return 2;
+  }
+
+}

web/modules/custom/opdavies_talks/tests/src/Kernel/Repository/TalkNodeRepositoryTest.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\Tests\opdavies_talks\Kernel\Repository;
+
+use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
+use Drupal\opdavies_talks\Repository\TalkNodeRepository;
+
+final class TalkNodeRepositoryTest extends EntityKernelTestBase {
+
+  protected static $modules = ['opdavies_talks'];
+
+  public function test_it_returns_a_count(): void {
+    $talkRepository = $this->container->get(TalkNodeRepository::class);
+
+    self::assertSame(2, $talkRepository->getCount());
+  }
+
+}