Index: branches/RC/core/units/categories/categories_tag_processor.php
===================================================================
diff -u -N -r10538 -r10908
--- branches/RC/core/units/categories/categories_tag_processor.php	(.../categories_tag_processor.php)	(revision 10538)
+++ branches/RC/core/units/categories/categories_tag_processor.php	(.../categories_tag_processor.php)	(revision 10908)
@@ -769,6 +769,86 @@
 
 		return $this->Application->HREF($t, '', $params);
 	}
+	
+	
+	/**
+	 * Returns spelling suggestions against search keyword
+	 *
+	 * @param Array $params
+	 * @return string
+	 */
+	function SpellingSuggestions($params)
+	{
+		$keywords = unhtmlentities( trim($this->Application->GetVar('keywords')) );
+		if (!$keywords) {
+			return ;
+		}
+
+		// 1. try to get already cached suggestion
+		$suggestion = $this->Application->getCache('search.suggestion', $keywords);
+		if ($suggestion !== false) {
+			return $suggestion;
+		}
+
+		$table_name = $this->Application->getUnitOption('spelling-dictionary', 'TableName');
+
+		// 2. search suggestion in database
+		$sql = 'SELECT SuggestedCorrection
+				FROM ' . $table_name . '
+				WHERE MisspelledWord = ' . $this->Conn->qstr($keywords);
+		$suggestion = $this->Conn->GetOne($sql);
+		if ($suggestion !== false) {
+			$this->Application->setCache('search.suggestion', $keywords, $suggestion);
+			return $suggestion;
+		}
+
+		// 3. suggestion not found in database, ask webservice
+		$app_id = $this->Application->ConfigValue('YahooApplicationId');
+		$url = 'http://search.yahooapis.com/WebSearchService/V1/spellingSuggestion?appid=' . $app_id . '&query=';
+
+		$curl_helper =& $this->Application->recallObject('CurlHelper');
+		/* @var $curl_helper kCurlHelper */
+
+		$xml_data = $curl_helper->Send($url . urlencode($keywords));
+
+		$xml_helper =& $this->Application->recallObject('kXMLHelper');
+		/* @var $xml_helper kXMLHelper */
+
+		$root_node =& $xml_helper->Parse($xml_data);
+
+		$result = $root_node->FindChild('RESULT');
+		/* @var $result kXMLNode */
+
+		if (is_object($result)) {
+			// webservice responded -> save in local database
+			$fields_hash = Array (
+				'MisspelledWord' => $keywords,
+				'SuggestedCorrection' => $result->Data,
+			);
+
+			$this->Conn->doInsert($fields_hash, $table_name);
+			$this->Application->setCache('search.suggestion', $keywords, $result->Data);
+
+			return $result->Data;
+		}
+
+		return '';
+	}
+
+	/**
+	 * Shows link for searching by suggested word
+	 *
+	 * @param Array $params
+	 * @return string
+	 */
+	function SuggestionLink($params)
+	{
+		$params['keywords'] = $this->SpellingSuggestions($params);
+
+		return $this->Application->ProcessParsedTag('m', 'Link', $params);
+	}
+
+	
 }
 
 ?>
\ No newline at end of file