Adds event before delete search keywords

src/events/DeleteKeywordsEvent.php

@@ -0,0 +1,36 @@
+<?php
+/**
+ * @link https://craftcms.com/
+ * @copyright Copyright (c) Pixel & Tonic, Inc.
+ * @license https://craftcms.github.io/license/
+ */
+
+namespace craft\events;
+
+use craft\base\ElementInterface;
+use craft\base\FieldInterface;
+use yii\base\Event;
+
+/**
+ * CancelableEvent class.
+ *
+ * @author Pixel & Tonic, Inc. <support@pixelandtonic.com>
+ * @since 3.0.0
+ */
+class DeleteKeywordsEvent extends Event
+{
+    /**
+     * @var ElementInterface The element being indexed
+     */
+    public ElementInterface $element;
+
+    /**
+     * @var FieldInterface[] List fields whose keywords are being updated
+     */
+    public array $updateFields = [];
+
+    /**
+     * @var int[] List field IDs to be left alone in the {{searchindexes}} table
+     */
+    public array $ignoreFieldIds = [];
+}

src/services/Search.php

@@ -15,6 +15,7 @@
 use craft\db\Query;
 use craft\db\Table;
 use craft\elements\db\ElementQuery;
+use craft\events\DeleteKeywordsEvent;
 use craft\events\IndexKeywordsEvent;
 use craft\events\SearchEvent;
 use craft\helpers\ArrayHelper;
@@ -49,6 +50,11 @@
      */
     public const EVENT_BEFORE_INDEX_KEYWORDS = 'beforeIndexKeywords';
 
+    /**
+     * @event DeleteKeywordsEvent The event that is triggered before keywords are deleted for an element.
+     */
+    public const EVENT_BEFORE_DELETE_KEYWORDS = 'beforeDeleteKeywords';
+
     /**
      * @event SearchEvent The event that is triggered before a search is performed.
      */
@@ -168,6 +174,18 @@
             }
         }
 
+        if ($this->hasEventHandlers(self::EVENT_BEFORE_DELETE_KEYWORDS)) {
+            $event = new DeleteKeywordsEvent([
+                'element' => $element,
+                'updateFields' => $updateFields,
+                'ignoreFieldIds' => $ignoreFieldIds,
+            ]);
+
+            $this->trigger(self::EVENT_BEFORE_DELETE_KEYWORDS, $event);
+            $updateFields = $event->updateFields;
+            $ignoreFieldIds = $event->ignoreFieldIds;
+        }
+
         // Clear the element’s current search keywords
         $deleteCondition = [
             'elementId' => $element->id,