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diff --git a/web/modules/contrib/diff/src/DiffEntityParser.php b/web/modules/contrib/diff/src/DiffEntityParser.php
new file mode 100644
index 000000000..bc41aa241
--- /dev/null
+++ b/web/modules/contrib/diff/src/DiffEntityParser.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace Drupal\diff;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Core\Language\LanguageInterface;
+
+/**
+ * Transforms an entity into an array of strings for diff.
+ */
+class DiffEntityParser {
+
+  /**
+   * The diff field builder plugin manager.
+   *
+   * @var \Drupal\diff\DiffBuilderManager
+   */
+  protected $diffBuilderManager;
+
+  /**
+   * Wrapper object for simple configuration from diff.settings.yml.
+   *
+   * @var \Drupal\Core\Config\ImmutableConfig
+   */
+  protected $config;
+
+  /**
+   * Wrapper object for simple configuration from diff.plugins.yml.
+   *
+   * @var \Drupal\Core\Config\ImmutableConfig
+   */
+  protected $pluginsConfig;
+
+  /**
+   * Constructs a DiffEntityParser object.
+   *
+   * @param \Drupal\diff\DiffBuilderManager $diff_builder_manager
+   *   The diff builder manager.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The configuration factory.
+   */
+  public function __construct(DiffBuilderManager $diff_builder_manager, ConfigFactoryInterface $config_factory) {
+    $this->config = $config_factory->get('diff.settings');
+    $this->pluginsConfig = $config_factory->get('diff.plugins');
+    $this->diffBuilderManager = $diff_builder_manager;
+  }
+
+  /**
+   * Transforms an entity into an array of strings.
+   *
+   * Parses an entity's fields and for every field it builds an array of string
+   * to be compared. Basically this function transforms an entity into an array
+   * of strings.
+   *
+   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
+   *   An entity containing fields.
+   *
+   * @return array
+   *   Array of strings resulted by parsing the entity.
+   */
+  public function parseEntity(ContentEntityInterface $entity) {
+    $result = array();
+    $langcode = \Drupal::languageManager()->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId();
+    // Load entity of current language, otherwise fields are always compared by
+    // their default language.
+    if ($entity->hasTranslation($langcode)) {
+      $entity = $entity->getTranslation($langcode);
+    }
+    $entity_type_id = $entity->getEntityTypeId();
+    // Loop through entity fields and transform every FieldItemList object
+    // into an array of strings according to field type specific settings.
+    /** @var \Drupal\Core\Field\FieldItemListInterface $field_items */
+    foreach ($entity as $field_items) {
+      // Define if the current field should be displayed as a diff change.
+      $show_diff = $this->diffBuilderManager->showDiff($field_items->getFieldDefinition()->getFieldStorageDefinition());
+      if (!$show_diff || !$entity->get($field_items->getFieldDefinition()->getName())->access('view')) {
+        continue;
+      }
+      // Create a plugin instance for the field definition.
+      $plugin = $this->diffBuilderManager->createInstanceForFieldDefinition($field_items->getFieldDefinition());
+      if ($plugin) {
+        // Create the array with the fields of the entity. Recursive if the
+        // field contains entities.
+        if ($plugin instanceof FieldReferenceInterface) {
+          foreach ($plugin->getEntitiesToDiff($field_items) as $entity_key => $reference_entity) {
+            foreach ($this->parseEntity($reference_entity) as $key => $build) {
+              $result[$key] = $build;
+              $result[$key]['label'] = $field_items->getFieldDefinition()->getLabel() . ' > ' . $result[$key]['label'];
+            };
+          }
+        }
+        else {
+          $build = $plugin->build($field_items);
+          if (!empty($build)) {
+            $result[$entity->id() . ':' . $entity_type_id . '.' . $field_items->getName()] = $build;
+            $result[$entity->id() . ':' . $entity_type_id . '.' . $field_items->getName()]['label'] = $field_items->getFieldDefinition()->getLabel();
+          }
+        }
+      }
+    }
+
+    $this->diffBuilderManager->clearCachedDefinitions();
+    return $result;
+  }
+
+}