feat(blog): use the article repository

Use the `ArticleRepository` within `BlogPageController` to load and
retrieve article nodes.

web/modules/custom/my_module/my_module.services.yml

@@ -1,3 +1,6 @@
 services:
+  Drupal\my_module\Controller\BlogPageController:
+    autowire: true
+
   Drupal\my_module\Repository\ArticleRepository:
     autowire: true

web/modules/custom/my_module/src/Controller/BlogPageController.php

@@ -4,18 +4,47 @@ declare(strict_types=1);
 
 namespace Drupal\my_module\Controller;
 
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Entity\EntityViewBuilderInterface;
+use Drupal\Core\Render\RendererInterface;
 use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\my_module\Repository\ArticleRepository;
 
 final class BlogPageController {
 
   use StringTranslationTrait;
 
+  private EntityViewBuilderInterface $nodeViewBuilder;
+
+  public function __construct(
+    private RendererInterface $renderer,
+    EntityTypeManagerInterface $entityTypeManager,
+    private ArticleRepository $articleRepository,
+  ) {
+    $this->nodeViewBuilder = $entityTypeManager->getViewBuilder(entity_type_id: 'node');
+  }
+
   /**
    * @return array<string, mixed>
    */
   public function __invoke(): array {
+    $articles = $this->articleRepository->getAll();
+
+    if ($articles === []) {
+      return ['#markup' => $this->t('Welcome to my blog!')];
+    }
+
+    $build = [];
+
+    foreach ($articles as $article) {
+      $build[] = $this->nodeViewBuilder->view(
+        entity: $article,
+        view_mode: 'teaser',
+      );
+    }
+
     return [
-      '#markup' => $this->t('Welcome to my blog!'),
+      '#markup' => $this->renderer->render($build),
     ];
   }
 

web/modules/custom/my_module/tests/src/Functional/BlogPageTest.php

@@ -30,4 +30,21 @@ final class BlogPageTest extends BrowserTestBase {
     $assert->pageTextContains('Welcome to my blog!');
   }
 
+  /** @test */
+  public function it_shows_articles(): void {
+    $this->createContentType(['type' => 'article']);
+
+    $this->createNode([
+      'title' => 'This is a test article',
+      'type' => 'article',
+    ]);
+
+    $this->drupalGet('/blog');
+
+    $assert = $this->assertSession();
+
+    $assert->statusCodeEquals(Response::HTTP_OK);
+    $assert->pageTextContains('This is a test article');
+  }
+
 }