Version 1

[yaffs-website] / web / core / modules / editor / src / Plugin / Filter / EditorFileReference.php

diff --git a/web/core/modules/editor/src/Plugin/Filter/EditorFileReference.php b/web/core/modules/editor/src/Plugin/Filter/EditorFileReference.php
new file mode 100644 (file)
index 0000000..cf725a7
--- /dev/null
+++ b/web/core/modules/editor/src/Plugin/Filter/EditorFileReference.php
@@ -0,0 +1,100 @@
+<?php
+
+namespace Drupal\editor\Plugin\Filter;
+
+use Drupal\Component\Utility\Html;
+use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\filter\FilterProcessResult;
+use Drupal\filter\Plugin\FilterBase;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides a filter to track images uploaded via a Text Editor.
+ *
+ * Generates file URLs and associates the cache tags of referenced files.
+ *
+ * @Filter(
+ *   id = "editor_file_reference",
+ *   title = @Translation("Track images uploaded via a Text Editor"),
+ *   description = @Translation("Ensures that the latest versions of images uploaded via a Text Editor are displayed."),
+ *   type = Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_REVERSIBLE
+ * )
+ */
+class EditorFileReference extends FilterBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * An entity manager object.
+   *
+   * @var \Drupal\Core\Entity\EntityManagerInterface
+   */
+  protected $entityManager;
+
+  /**
+   * Constructs a \Drupal\editor\Plugin\Filter\EditorFileReference object.
+   *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin_id for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
+   *   An entity manager object.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityManagerInterface $entity_manager) {
+    $this->entityManager = $entity_manager;
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  static public function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('entity.manager')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function process($text, $langcode) {
+    $result = new FilterProcessResult($text);
+
+    if (stristr($text, 'data-entity-type="file"') !== FALSE) {
+      $dom = Html::load($text);
+      $xpath = new \DOMXPath($dom);
+      $processed_uuids = [];
+      foreach ($xpath->query('//*[@data-entity-type="file" and @data-entity-uuid]') as $node) {
+        $uuid = $node->getAttribute('data-entity-uuid');
+
+        // If there is a 'src' attribute, set it to the file entity's current
+        // URL. This ensures the URL works even after the file location changes.
+        if ($node->hasAttribute('src')) {
+          $file = $this->entityManager->loadEntityByUuid('file', $uuid);
+          if ($file) {
+            $node->setAttribute('src', file_url_transform_relative(file_create_url($file->getFileUri())));
+          }
+        }
+
+        // Only process the first occurrence of each file UUID.
+        if (!isset($processed_uuids[$uuid])) {
+          $processed_uuids[$uuid] = TRUE;
+
+          $file = $this->entityManager->loadEntityByUuid('file', $uuid);
+          if ($file) {
+            $result->addCacheTags($file->getCacheTags());
+          }
+        }
+      }
+      $result->setProcessedText(Html::serialize($dom));
+    }
+
+    return $result;
+  }
+
+}