Extracted logic to service

caption_linker.services.yml

@@ -0,0 +1,7 @@
+services:
+  caption_linker.caption_linker:
+    class: Drupal\caption_linker\Service\CaptionLinker
+    arguments:
+      - '@entity_type.manager'
+      - '@islandora.utils'
+      - '@logger.channel.islandora'

src/Plugin/Action/LinkCaption.php

@@ -1,16 +1,13 @@
 <?php
 
 declare(strict_types=1);
-
 namespace Drupal\caption_linker\Plugin\Action;
 
+use Drupal\caption_linker\Service\CaptionLinker;
 use Drupal\Core\Action\ActionBase;
 use Drupal\Core\Entity\ContentEntityInterface;
-use Drupal\Core\Entity\EntityTypeManagerInterface;
-use Drupal\Core\Logger\LoggerChannelInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Session\AccountInterface;
-use Drupal\islandora\IslandoraUtils;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -22,20 +19,6 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  *   type = "node",
  *   category = @Translation("Custom"),
  * )
- *
- * @DCG
- * For updating entity fields consider extending FieldUpdateActionBase.
- * @see \Drupal\Core\Field\FieldUpdateActionBase
- *
- * @DCG
- * In order to set up the action through admin interface the plugin has to be
- * configurable.
- * @see https://www.drupal.org/project/drupal/issues/2815301
- * @see https://www.drupal.org/project/drupal/issues/2815297
- *
- * @DCG
- * The whole action API is subject of change.
- * @see https://www.drupal.org/project/drupal/issues/2011038
  */
 final class LinkCaption extends ActionBase implements ContainerFactoryPluginInterface {
 
@@ -46,9 +29,7 @@ final class LinkCaption extends ActionBase implements ContainerFactoryPluginInte
     array $configuration,
     $plugin_id,
     $plugin_definition,
-    private readonly EntityTypeManagerInterface $entityTypeManager,
-    private readonly IslandoraUtils $islandoraUtils,
-    private readonly LoggerChannelInterface $loggerChannelIslandora,
+    private readonly CaptionLinker $captionLinker,
   ) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
   }
@@ -61,9 +42,7 @@ final class LinkCaption extends ActionBase implements ContainerFactoryPluginInte
       $configuration,
       $plugin_id,
       $plugin_definition,
-      $container->get('entity_type.manager'),
-      $container->get('islandora.utils'),
-      $container->get('logger.channel.islandora'),
+       $container->get('caption_linker.caption_linker')
     );
   }
 
@@ -74,7 +53,6 @@ final class LinkCaption extends ActionBase implements ContainerFactoryPluginInte
     /** @var \Drupal\node\NodeInterface $object */
     $access = $object->access('update', $account, TRUE)
       ->andIf($object->status->access('edit', $account, TRUE));
-
     return $return_as_object ? $access : $access->isAllowed();
   }
 
@@ -82,26 +60,7 @@ final class LinkCaption extends ActionBase implements ContainerFactoryPluginInte
    * {@inheritdoc}
    */
   public function execute(ContentEntityInterface $entity = NULL): void {
-    $transcript_media = $this->getMediaByUri($entity, 'http://pcdm.org/use#Transcript');
-    $host_media = $this->getMediaByUri($entity, 'http://pcdm.org/use#ServiceFile')
-        ?? $this->getMediaByUri($entity, 'http://pcdm.org/use#OriginalFile');
-
-    if ($transcript_media && $host_media
-        && $transcript_media->bundle() === 'able_player_caption'
-        && $host_media->hasField('field_ableplayer_media_caption')
-        && $host_media->get('field_ableplayer_media_caption')->isEmpty()) {
-
-      $host_media->set('field_ableplayer_media_caption', ['target_id' => $transcript_media->id()]);
-      $host_media->save();
-    }
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getMediaByUri($entity, $uri) {
-    $term = $this->islandoraUtils->getTermForUri($uri);
-    return $this->islandoraUtils->getMediaWithTerm($entity, $term);
+    $this->captionLinker->linkCaption($entity);
   }
 
 }

src/Service/CaptionLinker.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace Drupal\caption_linker\Service;
+
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Logger\LoggerChannelInterface;
+use Drupal\islandora\IslandoraUtils;
+
+/**
+ * Service to link transcript media items to host media items as captions.
+ */
+class CaptionLinker {
+
+  /**
+   * Constructs a new CaptionLinker service.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entityTypeManager
+   *   The entity type manager service.
+   * @param \Drupal\islandora\IslandoraUtils $islandoraUtils
+   *   The Islandora utils service.
+   * @param \Drupal\Core\Logger\LoggerChannelInterface $logger
+   *   The logger for the Islandora channel.
+   */
+  public function __construct(
+    protected readonly EntityTypeManagerInterface $entityTypeManager,
+    protected readonly IslandoraUtils $islandoraUtils,
+    protected readonly LoggerChannelInterface $logger
+  ) {}
+
+  /**
+   * Links a transcript media item to a host media item as a caption.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+   *   The node entity to process.
+   */
+  public function linkCaption(ContentEntityInterface $entity): void {
+    $transcript_media = $this->getMediaByUri($entity, 'http://pcdm.org/use#Transcript');
+    $host_media = $this->getMediaByUri($entity, 'http://pcdm.org/use#ServiceFile')
+      ?? $this->getMediaByUri($entity, 'http://pcdm.org/use#OriginalFile');
+
+    if ($transcript_media && $host_media
+        && $transcript_media->bundle() === 'able_player_caption'
+        && $host_media->hasField('field_ableplayer_media_caption')
+        && $host_media->get('field_ableplayer_media_caption')->isEmpty()) {
+      $host_media->set('field_ableplayer_media_caption', ['target_id' => $transcript_media->id()]);
+      $host_media->save();
+    }
+  }
+
+  /**
+   * Gets a media item from an entity by its RDF use URI.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+   *   The node or media entity.
+   * @param string $uri
+   *   The RDF use URI.
+   *
+   * @return \Drupal\media\MediaInterface|null
+   *   The matching media item or NULL if not found.
+   */
+  protected function getMediaByUri(ContentEntityInterface $entity, string $uri) {
+    $term = $this->islandoraUtils->getTermForUri($uri);
+    return $this->islandoraUtils->getMediaWithTerm($entity, $term);
+  }
+
+}

tests/src/Unit/Service/CaptionLinkerTest.php

@@ -0,0 +1,101 @@
+<?php
+
+namespace Drupal\Tests\caption_linker\Unit\Service;
+
+use Drupal\caption_linker\Service\CaptionLinker;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Logger\LoggerChannelInterface;
+use Drupal\islandora\IslandoraUtils;
+use Drupal\media\MediaInterface;
+use Drupal\node\NodeInterface;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @coversDefaultClass \Drupal\caption_linker\Service\CaptionLinker
+ * @group caption_linker
+ */
+class CaptionLinkerTest extends TestCase {
+
+  /**
+   * The service under test.
+   */
+  protected CaptionLinker $captionLinker;
+
+  protected MockObject $islandoraUtils;
+  protected MockObject $entityTypeManager;
+  protected MockObject $logger;
+
+  protected function setUp(): void {
+    $this->islandoraUtils = $this->createMock(IslandoraUtils::class);
+    $this->entityTypeManager = $this->createMock(EntityTypeManagerInterface::class);
+    $this->logger = $this->createMock(LoggerChannelInterface::class);
+
+    $this->captionLinker = new CaptionLinker(
+      $this->entityTypeManager,
+      $this->islandoraUtils,
+      $this->logger
+    );
+  }
+
+  /**
+   * Tests linking the caption when all conditions are met.
+   */
+  public function testLinkCaption(): void {
+    $node = $this->createMock(NodeInterface::class);
+    $transcript = $this->createMock(MediaInterface::class);
+    $host = $this->createMock(MediaInterface::class);
+
+    // Mock the Islandora methods.
+    $this->islandoraUtils->method('getTermForUri')->willReturn('mock_term');
+    $this->islandoraUtils->method('getMediaWithTerm')
+      ->withConsecutive([$node, 'mock_term'], [$node, 'mock_term'], [$node, 'mock_term'])
+      ->willReturnOnConsecutiveCalls($transcript, $host, null);
+
+    $transcript->method('bundle')->willReturn('able_player_caption');
+
+    // Field checks and save expectations.
+    $host->method('hasField')->with('field_ableplayer_media_caption')->willReturn(TRUE);
+    $host->method('get')->with('field_ableplayer_media_caption')->willReturn(
+      new class {
+        public function isEmpty() { return TRUE; }
+      }
+    );
+
+    $host->expects($this->once())->method('set')->with(
+      'field_ableplayer_media_caption',
+      ['target_id' => $transcript->id()]
+    );
+    $host->expects($this->once())->method('save');
+
+    $transcript->method('id')->willReturn(42);
+
+    $this->captionLinker->linkCaption($node);
+  }
+
+  /**
+   * Tests that no linking occurs if caption field is not empty.
+   */
+  public function testNoLinkIfFieldPopulated(): void {
+    $node = $this->createMock(NodeInterface::class);
+    $transcript = $this->createMock(MediaInterface::class);
+    $host = $this->createMock(MediaInterface::class);
+
+    $this->islandoraUtils->method('getTermForUri')->willReturn('mock_term');
+    $this->islandoraUtils->method('getMediaWithTerm')->willReturnOnConsecutiveCalls($transcript, $host);
+
+    $transcript->method('bundle')->willReturn('able_player_caption');
+    $host->method('hasField')->willReturn(TRUE);
+    $host->method('get')->willReturn(
+      new class {
+        public function isEmpty() { return FALSE; }
+      }
+    );
+
+    $host->expects($this->never())->method('set');
+    $host->expects($this->never())->method('save');
+
+    $this->captionLinker->linkCaption($node);
+  }
+
+}