Add method to the base class for fetching the url

Closes #3448925

src/Plugin/DatasetDestination/FileDestinationBase.php

@@ -12,6 +12,7 @@ use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\StreamWrapper\StreamWrapperInterface;
 use Drupal\Core\StreamWrapper\StreamWrapperManagerInterface;
 use Drupal\Core\StringTranslation\TranslatableMarkup;
+use Drupal\Core\Url;
 use Drupal\data_pipelines\Destination\DatasetDestinationPluginBase;
 use Drupal\data_pipelines\Entity\DatasetInterface;
 use Drupal\data_pipelines\Entity\DestinationInterface;
@@ -186,6 +187,27 @@ abstract class FileDestinationBase extends DatasetDestinationPluginBase implemen
     return $this->getDirPath() . $this->getFilename($dataset);
   }
 
+  /**
+   * Get the Url object for the file of the dataset.
+   *
+   * @param \Drupal\data_pipelines\Entity\DatasetInterface $dataset
+   *   The dataset.
+   *
+   * @return \Drupal\Core\Url
+   *   File Url.
+   */
+  public function getFileUrl(DatasetInterface $dataset): Url {
+    $fileUri = $this->getFilePath($dataset);
+    $filePath = $this->fileSystem->realpath($fileUri);
+    // Add the timestamp as a cache-bursting parameter.
+    $timestamp = file_exists($filePath) ? filemtime($filePath) : time();
+    return Url::fromUri($fileUri, [
+      'query' => [
+        't' => $timestamp,
+      ],
+    ]);
+  }
+
   /**
    * Get the dataset filename.
    *