Select search backend by query parameter

[lhc/web/wiklou.git] / includes / search / SearchEngine.php

diff --git a/includes/search/SearchEngine.php b/includes/search/SearchEngine.php
index 4f4e31d..bfe7dda 100644 (file)
--- a/includes/search/SearchEngine.php
+++ b/includes/search/SearchEngine.php
@@ -453,13 +453,17 @@ class SearchEngine {
         * Load up the appropriate search engine class for the currently
         * active database backend, and return a configured instance.
         *
+        * @param String $type Type of search backend, if not the default
         * @return SearchEngine
         */
-       public static function create() {
+       public static function create( $type = null ) {
                global $wgSearchType;
                $dbr = null;
-               if ( $wgSearchType ) {
-                       $class = $wgSearchType;
+
+               $alternatives = self::getSearchTypes();
+               $type = $type !== null ? $type : $wgSearchType;
+               if ( $type && in_array( $type, $alternatives ) ) {
+                       $class = $type;
                } else {
                        $dbr = wfGetDB( DB_SLAVE );
                        $class = $dbr->getSearchEngine();
@@ -469,6 +473,22 @@ class SearchEngine {
                return $search;
        }
 
+       /**
+        * Return the search engines we support. If only $wgSearchType
+        * is set, it'll be an array of just that one item.
+        *
+        * @return array
+        */
+       public static function getSearchTypes() {
+               global $wgSearchType, $wgSearchTypeAlternatives;
+               static $alternatives = null;
+               if ( $alternatives === null ) {
+                       $alternatives = $wgSearchTypeAlternatives ?: array();
+                       array_unshift( $alternatives, $wgSearchType );
+               }
+               return $alternatives;
+       }
+
        /**
         * Create or update the search index record for the given page.
         * Title and text should be pre-processed.