Index: branches/5.2.x/core/units/helpers/page_helper.php
===================================================================
diff -u -N -r16513 -r16634
--- branches/5.2.x/core/units/helpers/page_helper.php	(.../page_helper.php)	(revision 16513)
+++ branches/5.2.x/core/units/helpers/page_helper.php	(.../page_helper.php)	(revision 16634)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: page_helper.php 16513 2017-01-20 14:10:53Z alex $
+* @version	$Id: page_helper.php 16634 2018-11-13 09:38:24Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2011 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -438,4 +438,50 @@
 
 		return $content_block->isLoaded();
 	}
+
+	/**
+	 * Returns revision content
+	 *
+	 * @param integer $page_revision_id Page revision Id.
+	 *
+	 * @return array
+	 */
+	public function getRevisionContent($page_revision_id)
+	{
+		$sql = 'SELECT *
+				FROM ' . TABLE_PREFIX . 'PageContent
+				WHERE RevisionId = ' . $page_revision_id;
+		$blocks = $this->Conn->GetIterator($sql);
+
+		/** @var kMultiLanguageHelper $ml_helper */
+		$ml_helper = $this->Application->recallObject('kMultiLanguageHelper');
+		$content = array();
+
+		foreach ( $ml_helper->getLanguages() as $lang_id ) {
+			$parts = array();
+
+			foreach ( $blocks as $block_data ) {
+				if ( (string)$block_data['l' . $lang_id . '_Content'] !== '' ) {
+					$parts[] = $this->makeSearchable($block_data['l' . $lang_id . '_Content']);
+				}
+			}
+
+			$content['l' . $lang_id . '_PageContent'] = implode(' ', $parts);
+		}
+
+		return $content;
+	}
+
+	/**
+	 * Unescapes and removes tags
+	 *
+	 * @param string $content Content.
+	 *
+	 * @return string
+	 */
+	protected function makeSearchable($content)
+	{
+		return trim(strip_tags(html_entity_decode($content, ENT_QUOTES, 'UTF-8')));
+	}
+
 }